Coastal Waters Forecast
Issued by NWS Boston, MA
Issued by NWS Boston, MA
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819 FZUS51 KBOX 142003 CWFBOX Coastal Waters Forecast for Massachusetts and Rhode Island National Weather Service Boston/Norton MA 403 PM EDT Fri Aug 14 2026 Coastal waters from the Merrimack River MA to Watch Hill RI out to 60 NM ANZ200-150900- 403 PM EDT Fri Aug 14 2026 .Synopsis for Massachusetts and Rhode Island coastal waters... High pres builds over the waters this weekend, leading to calmer boating conditions. Next system Sunday night brings gusty winds and building seas that may warrant Small Craft Advisories. High pres returns Tue through the middle of next week. $$ ANZ250-150900- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 403 PM EDT Fri Aug 14 2026 .TONIGHT...W winds 5 to 10 kt, becoming N after midnight. Seas around 2 ft. Wave Detail: NE 2 ft at 9 seconds and NW 1 foot at 3 seconds. .SAT...N winds 5 to 10 kt, becoming NE in the afternoon. Seas around 2 ft. Wave Detail: N 2 ft at 6 seconds and NW 1 foot at 3 seconds. .SAT NIGHT...S winds around 5 kt, becoming NW after midnight. Seas 1 foot or less. Wave Detail: S 1 foot at 2 seconds and NE 1 foot at 7 seconds. .SUN...E winds around 5 kt, becoming S 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 1 foot or less, then 2 to 3 ft in the afternoon. Wave Detail: W 1 foot at 2 seconds and SE 1 foot at 8 seconds, becoming S 2 ft at 3 seconds and SE 1 foot at 9 seconds. .SUN NIGHT...S winds 15 to 20 kt. Gusts up to 20 kt, increasing to 30 kt after midnight. Seas 2 to 3 ft. Wave Detail: S 3 ft at 4 seconds and SE 1 foot at 10 seconds. A chance of showers in the evening, then showers after midnight. .MON...S winds 15 to 20 kt, becoming SE 10 to 15 kt in the afternoon. Gusts up to 30 kt. Seas 2 to 4 ft. Wave Detail: S 4 ft at 5 seconds and SE 3 ft at 9 seconds. Showers likely, mainly in the morning. .MON NIGHT...N winds 5 to 10 kt. Seas 2 to 3 ft. .TUE THROUGH WED NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-150900- Massachusetts Bay and Ipswich Bay- 403 PM EDT Fri Aug 14 2026 .TONIGHT...W winds 5 to 10 kt, becoming N after midnight. Seas 1 foot or less. Wave Detail: W 1 foot at 2 seconds and NE 1 foot at 9 seconds. .SAT...N winds around 5 kt, becoming E in the afternoon. Seas 1 foot or less. Wave Detail: NW 1 foot at 2 seconds and NE 1 foot at 5 seconds. .SAT NIGHT...S winds 5 to 10 kt, becoming NW after midnight. Seas 1 foot or less. Wave Detail: SE 1 foot at 2 seconds and NE 1 foot at 6 seconds. .SUN...NE winds around 5 kt, becoming SE 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 1 foot or less, then around 2 ft in the afternoon. Wave Detail: SW 1 foot at 2 seconds and NE 1 foot at 7 seconds, becoming SE 2 ft at 3 seconds and E 1 foot at 10 seconds. .SUN NIGHT...S winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: S 2 ft at 3 seconds and E 1 foot at 10 seconds. A chance of showers in the evening, then showers after midnight. .MON...SE winds 15 to 20 kt, diminishing to 5 to 10 kt in the afternoon. Gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 4 seconds and SE 2 ft at 9 seconds. Showers, mainly in the morning. .MON NIGHT...N winds 5 to 10 kt. Seas around 2 ft. .TUE THROUGH WED NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ231-150900- Cape Cod Bay- 403 PM EDT Fri Aug 14 2026 .TONIGHT...SW winds 5 to 10 kt, becoming N after midnight. Seas 1 foot or less, then around 2 ft after midnight. Wave Detail: NW 1 foot at 3 seconds and NE 1 foot at 10 seconds, becoming N 1 foot at 3 seconds and N 1 foot at 7 seconds. .SAT...N winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: N 1 foot at 3 seconds. .SAT NIGHT...SE winds around 5 kt, becoming SW after midnight. Seas 1 foot or less. Wave Detail: N 1 foot at 4 seconds. .SUN...E winds around 5 kt, becoming S 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 1 foot or less, then around 2 ft in the afternoon. Wave Detail: NW 1 foot at 4 seconds, becoming S 1 foot at 3 seconds and NE 1 foot at 4 seconds. .SUN NIGHT...S winds 10 to 15 kt, increasing to 15 to 20 kt after midnight. Gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: SE 2 ft at 4 seconds. A chance of showers in the evening, then showers likely after midnight. .MON...S winds 15 to 20 kt, becoming SE 10 to 15 kt in the afternoon. Gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: S 2 ft at 3 seconds and SE 1 foot at 12 seconds. Showers likely, mainly in the morning. .MON NIGHT...N winds 5 to 10 kt. Seas around 2 ft. .TUE THROUGH WED NIGHT...S winds 5 to 10 kt. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-150900- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 NM- 403 PM EDT Fri Aug 14 2026 .TONIGHT...SW winds 5 to 10 kt, becoming N after midnight. Seas around 2 ft. Wave Detail: W 1 foot at 4 seconds and E 1 foot at 10 seconds. .SAT...N winds 5 to 10 kt. Seas around 2 ft. Wave Detail: N 2 ft at 6 seconds and SW 1 foot at 6 seconds. .SAT NIGHT...NE winds around 5 kt, becoming W around 5 kt after midnight. Seas around 2 ft. Wave Detail: N 2 ft at 6 seconds and S 1 foot at 6 seconds. .SUN...E winds around 5 kt, becoming S in the afternoon. Seas around 2 ft. Wave Detail: S 2 ft at 4 seconds and NE 1 foot at 7 seconds. .SUN NIGHT...S winds 10 to 15 kt with gusts up to 20 kt, increasing to 15 to 20 kt with gusts up to 30 kt after midnight. Seas 2 to 3 ft. Wave Detail: S 3 ft at 4 seconds and SE 1 foot at 8 seconds. Showers likely after midnight. .MON...S winds 20 to 25 kt, becoming SE 15 to 20 kt in the afternoon. Gusts up to 30 kt. Seas 3 to 5 ft. Wave Detail: S 5 ft at 5 seconds and SE 1 foot at 10 seconds. Showers likely in the morning. A chance of showers in the afternoon. .MON NIGHT...NE winds 10 to 15 kt, becoming N 5 to 10 kt after midnight. Seas 3 to 5 ft. .TUE AND TUE NIGHT...N winds 5 to 10 kt, becoming SW. Seas 2 to 4 ft. .WED AND WED NIGHT...SW winds 5 to 10 kt, becoming S 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ255-150900- Coastal Waters extending out to 25 NM South of Marthas Vineyard and Nantucket- 403 PM EDT Fri Aug 14 2026 .TONIGHT...SW winds 5 to 10 kt, becoming N after midnight. Seas around 2 ft. Wave Detail: SW 1 foot at 4 seconds and E 1 foot at 10 seconds. .SAT...NE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: NE 2 ft at 5 seconds and S 1 foot at 5 seconds. .SAT NIGHT...SE winds around 5 kt, becoming SW after midnight. Seas around 2 ft in the evening, then 1 foot or less. Wave Detail: SE 1 foot at 6 seconds, becoming SW 1 foot at 5 seconds and E 1 foot at 8 seconds. .SUN...S winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft in the afternoon. Wave Detail: SW 1 foot at 5 seconds and E 1 foot at 8 seconds, becoming S 2 ft at 4 seconds and SE 1 foot at 8 seconds. .SUN NIGHT...S winds 10 to 15 kt, increasing to 20 to 25 kt after midnight. Seas 2 to 3 ft, building to 3 to 5 ft after midnight. Wave Detail: S 2 ft at 4 seconds and SE 1 foot at 9 seconds, becoming S 5 ft at 7 seconds. A chance of showers after midnight. .MON...S winds 20 to 25 kt, diminishing to 15 to 20 kt in the afternoon. Seas 5 to 7 ft. Wave Detail: S 7 ft at 7 seconds and E 2 ft at 10 seconds. Showers likely in the morning. A chance of showers in the afternoon. .MON NIGHT...NW winds 10 to 15 kt. Seas 3 to 5 ft. .TUE AND TUE NIGHT...N winds 5 to 10 kt, becoming SW. Seas 2 to 4 ft. .WED AND WED NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-150900- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 NM South of Block Island- 403 PM EDT Fri Aug 14 2026 .TONIGHT...SW winds 5 to 10 kt, becoming N 10 to 15 kt after midnight. Seas around 2 ft. Wave Detail: W 2 ft at 5 seconds and E 2 ft at 10 seconds. .SAT...NE winds 10 to 15 kt, becoming E 5 to 10 kt in the afternoon. Seas around 2 ft. Wave Detail: NE 2 ft at 5 seconds and SW 1 foot at 6 seconds. .SAT NIGHT...SW winds 5 to 10 kt. Seas around 2 ft in the evening, then 1 foot or less. Wave Detail: S 1 foot at 5 seconds and SE 1 foot at 8 seconds, becoming S 1 foot at 4 seconds and SE 1 foot at 9 seconds. .SUN...SW winds around 5 kt, becoming S 10 to 15 kt in the afternoon. Seas 1 foot or less, then around 2 ft in the afternoon. Wave Detail: S 1 foot at 4 seconds and SE 1 foot at 9 seconds, becoming S 2 ft at 4 seconds and SE 1 foot at 9 seconds. .SUN NIGHT...S winds 15 to 20 kt, increasing to 20 to 25 kt after midnight. Gusts up to 30 kt. Seas 2 to 4 ft, building to 4 to 6 ft after midnight. Wave Detail: S 3 ft at 5 seconds and SE 1 foot at 9 seconds, becoming S 6 ft at 6 seconds and SE 1 foot at 9 seconds. A chance of showers in the evening, then showers after midnight. .MON...S winds 20 to 25 kt, becoming SW 15 to 20 kt in the afternoon. Gusts up to 30 kt. Seas 5 to 7 ft. Wave Detail: S 7 ft at 7 seconds. Showers, mainly in the morning. .MON NIGHT...N winds 10 to 15 kt. Seas 3 to 4 ft. .TUE AND TUE NIGHT...N winds 5 to 10 kt, becoming SW. Seas 2 to 4 ft. .WED AND WED NIGHT...SW winds 5 to 10 kt, becoming S 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ232-150900- Nantucket Sound- 403 PM EDT Fri Aug 14 2026 .TONIGHT...SW winds 5 to 10 kt, becoming N after midnight. Seas 1 foot or less. Wave Detail: SW 1 foot at 3 seconds and E 1 foot at 12 seconds. .SAT...N winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: NE 1 foot at 3 seconds and SW 1 foot at 4 seconds. .SAT NIGHT...SE winds around 5 kt, becoming SW after midnight. Seas 1 foot or less. Wave Detail: S 1 foot at 3 seconds and NE 1 foot at 6 seconds. .SUN...SW winds around 5 kt, becoming S 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 1 foot or less, then around 2 ft in the afternoon. Wave Detail: SW 1 foot at 2 seconds and E 1 foot at 7 seconds, becoming S 2 ft at 3 seconds and E 1 foot at 9 seconds. .SUN NIGHT AND MON...SE winds 20 to 25 kt with gusts up to 30 kt. Seas 2 to 4 ft. Wave Detail: S 4 ft at 5 seconds and SE 2 ft at 10 seconds. Showers likely through the day. A chance of showers in the afternoon. .MON NIGHT...N winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 5 seconds and SE 1 foot at 5 seconds. .TUE THROUGH WED NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-150900- Vineyard Sound- 403 PM EDT Fri Aug 14 2026 .TONIGHT...SW winds 5 to 10 kt, becoming N after midnight. Seas 1 foot or less. Wave Detail: SW 1 foot at 4 seconds and SE 1 foot at 11 seconds. .SAT...N winds 5 to 10 kt, becoming W in the afternoon. Seas 1 foot or less. Wave Detail: NE 1 foot at 3 seconds and SW 1 foot at 5 seconds. .SAT NIGHT...SW winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: S 1 foot at 3 seconds and E 1 foot at 9 seconds. .SUN...SW winds around 5 kt, becoming S 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 1 foot or less, then around 2 ft in the afternoon. Wave Detail: SW 1 foot at 3 seconds and SE 1 foot at 9 seconds, becoming SW 2 ft at 3 seconds and SE 1 foot at 9 seconds. .SUN NIGHT...S winds 15 to 20 kt, increasing to 20 to 25 kt after midnight. Seas 2 to 4 ft. Wave Detail: SW 4 ft at 6 seconds and SE 1 foot at 9 seconds. A chance of showers in the evening, then showers after midnight. .MON...S winds 20 to 25 kt with gusts up to 30 kt, diminishing to 15 to 20 kt in the afternoon. Seas 3 to 5 ft. Wave Detail: S 5 ft at 7 seconds and SE 5 ft at 9 seconds. Showers, mainly in the morning. .MON NIGHT...N winds 10 to 15 kt, diminishing to 5 to 10 kt after midnight. Seas 2 to 3 ft. .TUE THROUGH WED NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ234-150900- Buzzards Bay- 403 PM EDT Fri Aug 14 2026 .TONIGHT...W winds 5 to 10 kt, becoming N after midnight. Seas 1 foot or less. Wave Detail: SW 1 foot at 3 seconds and E 1 foot at 10 seconds. .SAT...N winds 5 to 10 kt, becoming S in the afternoon. Seas 1 foot or less. Wave Detail: NE 1 foot at 2 seconds and SW 1 foot at 3 seconds. .SAT NIGHT...SW winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: S 1 foot at 3 seconds and E 1 foot at 9 seconds. .SUN...NW winds around 5 kt, becoming S 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 1 foot or less, then 2 to 3 ft in the afternoon. Wave Detail: SW 1 foot at 3 seconds and E 1 foot at 8 seconds, becoming SW 2 ft at 3 seconds and SE 1 foot at 8 seconds. .SUN NIGHT...S winds 15 to 20 kt, increasing to 20 to 25 kt with gusts up to 30 kt after midnight. Seas 2 to 4 ft. Wave Detail: SW 4 ft at 5 seconds and SE 1 foot at 8 seconds. A chance of showers in the evening. Showers likely after midnight. .MON...S winds 20 to 25 kt, becoming SE 15 to 20 kt in the afternoon. Gusts up to 30 kt. Seas 2 to 4 ft. Wave Detail: S 4 ft at 7 seconds and SE 4 ft at 12 seconds. Showers likely, mainly in the morning. .MON NIGHT...N winds 5 to 10 kt. Seas 2 to 3 ft. .TUE THROUGH WED...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. .WED NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-150900- Rhode Island Sound- 403 PM EDT Fri Aug 14 2026 .TONIGHT...W winds 5 to 10 kt, becoming N after midnight. Seas around 2 ft. Wave Detail: SW 1 foot at 4 seconds and SE 1 foot at 10 seconds. .SAT...NE winds 5 to 10 kt, becoming SW in the afternoon. Seas around 2 ft. Wave Detail: NE 2 ft at 4 seconds and S 1 foot at 6 seconds. .SAT NIGHT...SW winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: SW 1 foot at 4 seconds and SE 1 foot at 9 seconds. .SUN...N winds around 5 kt, becoming S 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 1 foot or less, then around 2 ft in the afternoon. Wave Detail: S 1 foot at 4 seconds and SE 1 foot at 9 seconds, becoming S 2 ft at 3 seconds and SE 1 foot at 9 seconds. .SUN NIGHT...S winds 15 to 20 kt, increasing to 20 to 25 kt after midnight. Seas 2 to 3 ft, building to 3 to 5 ft after midnight. Wave Detail: S 3 ft at 4 seconds and SE 1 foot at 9 seconds, becoming S 5 ft at 6 seconds and SE 1 foot at 9 seconds. A chance of showers in the evening, then showers after midnight. .MON...S winds 20 to 25 kt, becoming SW 15 to 20 kt in the afternoon. Seas 4 to 6 ft. Wave Detail: S 6 ft at 7 seconds and SE 6 ft at 10 seconds. A chance of showers. .MON NIGHT...N winds 10 to 15 kt. Seas 2 to 4 ft. .TUE THROUGH WED...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. .WED NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ237-150900- Block Island Sound- 403 PM EDT Fri Aug 14 2026 .TONIGHT...W winds 5 to 10 kt, becoming N after midnight. Seas 1 foot or less, then around 2 ft after midnight. Wave Detail: W 1 foot at 4 seconds and SE 1 foot at 10 seconds, becoming SW 1 foot at 5 seconds and E 1 foot at 10 seconds. Isolated showers this evening. .SAT...NE winds 5 to 10 kt, becoming S in the afternoon. Seas around 2 ft. Wave Detail: NE 1 foot at 5 seconds and S 1 foot at 6 seconds. .SAT NIGHT...SW winds around 5 kt, becoming NW after midnight. Seas 1 foot or less. Wave Detail: SW 1 foot at 4 seconds and SE 1 foot at 8 seconds. .SUN...NE winds around 5 kt, becoming S 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 1 foot or less, then around 2 ft in the afternoon. Wave Detail: SW 1 foot at 4 seconds and SE 1 foot at 9 seconds, becoming S 2 ft at 4 seconds and SE 1 foot at 9 seconds. .SUN NIGHT...S winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: S 5 ft at 6 seconds and SE 1 foot at 9 seconds. A chance of showers in the evening. Showers after midnight. .MON...S winds 15 to 20 kt, becoming W 10 to 15 kt in the afternoon. Gusts up to 25 kt. Seas 4 to 6 ft. Wave Detail: S 5 ft at 7 seconds. A chance of showers. .MON NIGHT...N winds 5 to 10 kt. Seas 2 to 3 ft. .TUE THROUGH WED...SW winds 5 to 10 kt. Seas 2 to 3 ft. .WED NIGHT...SW winds around 10 kt. Seas around 2 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-150900- Boston Harbor- 403 PM EDT Fri Aug 14 2026 .TONIGHT...NW winds 5 to 10 kt, becoming N after midnight. Waves 1 foot or less. Isolated showers and tstms this evening. Some tstms may produce gusty winds and small hail this evening. .SAT...N winds around 5 kt, becoming E in the afternoon. Waves 1 foot or less. .SAT NIGHT...SE winds 5 to 10 kt, becoming NW after midnight. Waves 1 foot or less. .SUN...NE winds around 5 kt, becoming SE 10 to 15 kt in the afternoon. Waves 1 foot or less, then around 2 ft in the afternoon. .SUN NIGHT...S winds 10 to 15 kt, increasing to 15 to 20 kt after midnight. Gusts up to 25 kt. Waves around 2 ft. A chance of showers in the evening, then showers after midnight. .MON...SE winds 15 to 20 kt, becoming E 5 to 10 kt in the afternoon. Waves around 2 ft. Showers, mainly in the morning. .MON NIGHT...N winds around 5 kt. Waves 1 foot or less. .TUE THROUGH WED...S winds 5 to 10 kt. Waves around 2 ft. .WED NIGHT...S winds around 10 kt. Waves around 2 ft. A chance of showers. Winds and waves higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ236-150900- Narragansett Bay- 403 PM EDT Fri Aug 14 2026 .TONIGHT...W winds 5 to 10 kt, becoming N after midnight. Waves 1 foot or less. Isolated showers and tstms this evening. Some tstms may produce gusty winds and small hail this evening. .SAT...N winds 5 to 10 kt, becoming SW in the afternoon. Waves 1 foot or less. .SAT NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Waves 1 foot or less. .SUN...NE winds around 5 kt, becoming S 10 to 15 kt with gusts up to 20 kt in the afternoon. Waves 1 foot or less, then around 2 ft in the afternoon. .SUN NIGHT...S winds 10 to 15 kt, increasing to 15 to 20 kt after midnight. Gusts up to 25 kt. Waves 2 to 3 ft. A chance of showers in the evening. Showers after midnight. .MON...S winds 15 to 20 kt, becoming E 10 to 15 kt in the afternoon. Gusts up to 25 kt. Waves 2 to 4 ft. Showers, mainly in the morning. .MON NIGHT...N winds 5 to 10 kt. Waves 2 to 3 ft. .TUE THROUGH WED...SW winds 10 to 15 kt. Waves around 2 ft. .WED NIGHT...S winds 10 to 15 kt. Waves around 2 ft. A chance of showers. Winds and waves higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ280-150900- Ocean Waters from the Merrimack River to Plymouth from 40 to 60 NM- 403 PM EDT Fri Aug 14 2026 .TONIGHT...W winds 5 to 10 kt, becoming N 10 to 15 kt after midnight. Seas around 2 ft. Wave Detail: W 2 ft at 4 seconds and E 1 foot at 11 seconds. .SAT...N winds 5 to 10 kt. Seas around 2 ft. Wave Detail: N 2 ft at 4 seconds and SE 1 foot at 10 seconds. .SAT NIGHT...W winds 5 to 10 kt. Seas around 2 ft. Wave Detail: NW 1 foot at 4 seconds and SE 1 foot at 10 seconds. .SUN...NE winds 5 to 10 kt, becoming S with gusts up to 20 kt in the afternoon. Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds and SE 1 foot at 9 seconds. .SUN NIGHT...S winds 10 to 15 kt, increasing to 20 to 25 kt after midnight. Gusts up to 30 kt. Seas 2 to 4 ft. Wave Detail: S 4 ft at 4 seconds and SE 1 foot at 9 seconds. Showers likely after midnight. .MON...S winds 20 to 25 kt, diminishing to 15 to 20 kt in the afternoon. Gusts up to 30 kt. Seas 3 to 5 ft. Wave Detail: S 5 ft at 5 seconds and SE 1 foot at 10 seconds. Showers likely, mainly in the morning. .MON NIGHT...NE winds 5 to 10 kt. Seas 3 to 4 ft. .TUE AND TUE NIGHT...N winds 5 to 10 kt, becoming SW. Seas 2 to 4 ft. .WED AND WED NIGHT...SW winds 5 to 10 kt, becoming S 10 to 15 kt with gusts up to 25 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ281-150900- Ocean Waters from Provincetown to Nantucket from 20 to 60 NM- 403 PM EDT Fri Aug 14 2026 .TONIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas around 2 ft. Wave Detail: W 2 ft at 4 seconds and E 1 foot at 10 seconds. .SAT...N winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: NW 2 ft at 5 seconds and E 2 ft at 9 seconds. .SAT NIGHT...NW winds around 5 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 5 seconds and NE 2 ft at 7 seconds. .SUN...NE winds around 5 kt, becoming S in the afternoon. Seas around 2 ft. Wave Detail: SW 2 ft at 5 seconds and SE 1 foot at 9 seconds. .SUN NIGHT...S winds 10 to 15 kt with gusts up to 20 kt, increasing to 15 to 20 kt with gusts up to 30 kt after midnight. Seas 2 to 3 ft. Wave Detail: S 3 ft at 4 seconds and SE 1 foot at 9 seconds. A chance of showers after midnight. .MON...S winds 15 to 20 kt with gusts up to 30 kt. Seas 4 to 6 ft. Wave Detail: S 6 ft at 7 seconds and SE 3 ft at 10 seconds. Showers likely in the morning. A chance of showers in the afternoon. .MON NIGHT...E winds 10 to 15 kt with gusts up to 20 kt, becoming N after midnight. Seas 4 to 6 ft. A chance of showers in the evening. .TUE...N winds 5 to 10 kt. Seas 3 to 5 ft. .TUE NIGHT THROUGH WED NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ282-150900- Ocean Waters from Marthas Vineyard to Nantucket from 25 to 60 NM- 403 PM EDT Fri Aug 14 2026 .TONIGHT...SW winds around 5 kt, becoming NW after midnight. Seas around 2 ft. Wave Detail: SW 1 foot at 5 seconds and E 1 foot at 10 seconds. .SAT...NE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: NE 2 ft at 8 seconds and SW 1 foot at 5 seconds. .SAT NIGHT...NE winds around 5 kt. Seas around 2 ft. Wave Detail: NE 2 ft at 7 seconds and S 1 foot at 5 seconds. .SUN...NE winds around 5 kt, becoming SE in the afternoon. Seas around 2 ft. Wave Detail: S 1 foot at 5 seconds and NE 1 foot at 7 seconds. .SUN NIGHT...S winds 10 to 15 kt, increasing to 15 to 20 kt after midnight. Gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: S 4 ft at 7 seconds. A chance of showers after midnight. .MON...S winds 15 to 20 kt with gusts up to 30 kt. Seas 4 to 6 ft. Wave Detail: S 6 ft at 6 seconds and SE 4 ft at 9 seconds. Showers likely in the morning. A chance of showers in the afternoon. .MON NIGHT...W winds 10 to 15 kt with gusts up to 20 kt, becoming N after midnight. Seas 4 to 6 ft. A chance of showers in the evening. .TUE AND TUE NIGHT...N winds 5 to 10 kt. Seas 2 to 4 ft. .WED AND WED NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ283-150900- Ocean Waters from Montauk NY to Marthas Vineyard from 25 to 60 NM- 403 PM EDT Fri Aug 14 2026 .TONIGHT...SW winds around 5 kt, becoming N after midnight. Seas around 2 ft. Wave Detail: W 2 ft at 5 seconds and E 2 ft at 10 seconds. .SAT...NE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S 2 ft at 6 seconds and NE 2 ft at 6 seconds. .SAT NIGHT...SE winds around 5 kt, becoming S after midnight. Seas around 2 ft. Wave Detail: E 2 ft at 7 seconds and S 1 foot at 6 seconds. .SUN...S winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft in the afternoon. Wave Detail: S 1 foot at 5 seconds and SE 1 foot at 8 seconds, becoming S 2 ft at 4 seconds and SE 1 foot at 9 seconds. .SUN NIGHT...S winds 15 to 20 kt, increasing to 20 to 25 kt after midnight. Gusts up to 30 kt. Seas 2 to 4 ft, building to 4 to 6 ft after midnight. Wave Detail: S 4 ft at 5 seconds and SE 1 foot at 9 seconds, becoming S 6 ft at 6 seconds and SE 1 foot at 9 seconds. Showers likely after midnight. .MON...S winds 20 to 25 kt, becoming SW 15 to 20 kt in the afternoon. Gusts up to 30 kt. Seas 5 to 7 ft. Wave Detail: S 7 ft at 7 seconds. Showers likely in the morning. A chance of showers in the afternoon. .MON NIGHT...NW winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 4 to 5 ft. .TUE AND TUE NIGHT...N winds 5 to 10 kt, becoming SW. Seas 2 to 4 ft. .WED AND WED NIGHT...SW winds 5 to 10 kt, becoming S 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ For the latest updates...please visit our webpage at www.weather.gov/boston You can follow us on Facebook at www.facebook.com/us.nationalweatherservice.boston.gov You can follow us on Twitter at @NWSBoston