Coastal Waters Forecast
Issued by NWS Boston, MA
Issued by NWS Boston, MA
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368 FZUS51 KBOX 161705 CWFBOX Coastal Waters Forecast for Massachusetts and Rhode Island National Weather Service Boston/Norton MA 104 PM EDT Wed Sep 16 2026 Coastal waters from the Merrimack River MA to Watch Hill RI out to 60 NM ANZ200-170600- 104 PM EDT Wed Sep 16 2026 .Synopsis for Massachusetts and Rhode Island coastal waters... High pres overhead today bringing dry conditions and southwesterly winds. Cold front will cross the waters Thu night into early Fri. Showers possible late Thu into early Fri. High pres builds back in across the waters Sat. $$ ANZ250-170600- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 104 PM EDT Wed Sep 16 2026 .THIS AFTERNOON...S winds around 10 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds and E 1 foot at 5 seconds. .TONIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S 2 ft at 3 seconds and E 2 ft at 7 seconds. .THU...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 2 ft at 7 seconds and SW 1 foot at 3 seconds. .THU NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: E 2 ft at 4 seconds and SW 2 ft at 4 seconds. A chance of showers. .FRI...W winds around 10 kt with gusts up to 20 kt, becoming NW in the afternoon. Seas 2 to 3 ft. Wave Detail: W 2 ft at 3 seconds and SW 2 ft at 4 seconds. A chance of showers in the morning. .FRI NIGHT...N winds 10 to 15 kt, increasing to 15 to 20 kt after midnight. Gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: N 4 ft at 5 seconds and SW 1 foot at 3 seconds. .SAT AND SAT NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt, becoming S 5 to 10 kt. Seas 2 to 4 ft. .SUN AND SUN NIGHT...S winds 5 to 10 kt, becoming E. Seas 2 to 3 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-170600- Massachusetts Bay and Ipswich Bay- 104 PM EDT Wed Sep 16 2026 .THIS AFTERNOON...S winds around 10 kt. Seas around 2 ft. Wave Detail: SW 1 foot at 3 seconds and E 1 foot at 5 seconds. .TONIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: W 2 ft at 3 seconds and E 2 ft at 9 seconds. .THU...N winds around 5 kt, becoming SE in the afternoon. Seas around 2 ft. Wave Detail: E 2 ft at 8 seconds and S 1 foot at 3 seconds. .THU NIGHT...S winds 5 to 10 kt, becoming SW 10 to 15 kt with gusts up to 20 kt after midnight. Seas around 2 ft. Wave Detail: E 2 ft at 4 seconds and E 2 ft at 7 seconds. A chance of showers. .FRI...NW winds 5 to 10 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: E 2 ft at 7 seconds and W 1 foot at 2 seconds. A chance of showers in the morning. .FRI NIGHT...N winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: N 3 ft at 4 seconds and SW 2 ft at 7 seconds. .SAT AND SAT NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt, becoming S 5 to 10 kt. Seas 2 to 3 ft. .SUN AND SUN NIGHT...S winds 5 to 10 kt, becoming E 10 to 15 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. $$ ANZ231-170600- Cape Cod Bay- 104 PM EDT Wed Sep 16 2026 .THIS AFTERNOON...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S 1 foot at 2 seconds and N 1 foot at 4 seconds. .TONIGHT...SW winds 5 to 10 kt. Seas around 2 ft in the evening, then 1 foot or less. Wave Detail: SW 1 foot at 3 seconds and NE 1 foot at 4 seconds, becoming SW 1 foot at 2 seconds and NE 1 foot at 5 seconds. .THU...SW winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft in the afternoon. Wave Detail: SW 1 foot at 2 seconds and NE 1 foot at 7 seconds, becoming E 2 ft at 8 seconds and SW 1 foot at 3 seconds. .THU NIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt after midnight. Seas around 2 ft. Wave Detail: SW 1 foot at 2 seconds and W 1 foot at 3 seconds. A chance of showers after midnight. .FRI...W winds around 10 kt, becoming N in the afternoon. Gusts up to 20 kt. Seas around 2 ft. Wave Detail: SW 1 foot at 3 seconds and W 1 foot at 3 seconds. A chance of showers in the morning. .FRI NIGHT...N winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: N 4 ft at 4 seconds and SW 1 foot at 4 seconds. .SAT AND SAT NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt, becoming SE around 5 kt. Seas 2 to 3 ft. .SUN AND SUN NIGHT...SE winds 5 to 10 kt. Seas around 2 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-170600- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 NM- 104 PM EDT Wed Sep 16 2026 .THIS AFTERNOON...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: NE 2 ft at 7 seconds and SE 2 ft at 9 seconds. .TONIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 2 ft at 8 seconds and SW 1 foot at 3 seconds. .THU...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 2 ft at 8 seconds and SW 1 foot at 4 seconds. .THU NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: S 2 ft at 3 seconds and E 2 ft at 7 seconds. A chance of showers after midnight. .FRI...W winds 10 to 15 kt, becoming NW in the afternoon. Gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 4 seconds and E 2 ft at 7 seconds. A chance of showers in the morning. .FRI NIGHT...N winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: NE 4 ft at 6 seconds and NW 2 ft at 3 seconds. .SAT AND SAT NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt, becoming SE around 5 kt. Seas 2 to 4 ft. .SUN AND SUN NIGHT...SE winds 5 to 10 kt, increasing to 10 to 15 kt. Seas 2 to 4 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. $$ ANZ255-170600- Coastal Waters extending out to 25 NM South of Marthas Vineyard and Nantucket- 104 PM EDT Wed Sep 16 2026 .THIS AFTERNOON...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 2 ft at 6 seconds and NW 1 foot at 5 seconds. .TONIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 2 ft at 6 seconds and E 2 ft at 9 seconds. .THU...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 2 ft at 8 seconds and W 1 foot at 3 seconds. .THU NIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt after midnight. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and E 2 ft at 7 seconds. A chance of showers after midnight. .FRI...W winds around 15 kt, becoming NW in the afternoon. Gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: W 3 ft at 4 seconds and SW 3 ft at 5 seconds. A chance of showers in the morning. .FRI NIGHT...N winds 10 to 15 kt, becoming NE 15 to 20 kt after midnight. Gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: N 3 ft at 4 seconds and W 2 ft at 5 seconds. .SAT AND SAT NIGHT...NE winds 15 to 20 kt, becoming E 5 to 10 kt. Seas 2 to 3 ft. .SUN AND SUN NIGHT...SE winds 10 to 15 kt. Gusts up to 20 kt. Seas 2 to 4 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-170600- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 NM South of Block Island- 104 PM EDT Wed Sep 16 2026 .THIS AFTERNOON...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW 1 foot at 4 seconds and NW 1 foot at 4 seconds. .TONIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 2 ft at 7 seconds and SW 1 foot at 3 seconds. .THU...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and E 2 ft at 7 seconds. .THU NIGHT...SW winds 10 to 15 kt, increasing to 15 to 20 kt after midnight. Seas 2 to 4 ft. Wave Detail: SW 3 ft at 5 seconds and E 2 ft at 8 seconds. .FRI...W winds 10 to 15 kt with gusts up to 20 kt, becoming NW in the afternoon. Seas 2 to 4 ft. Wave Detail: SW 3 ft at 5 seconds and NW 2 ft at 4 seconds. .FRI NIGHT...N winds 15 to 20 kt. Seas 2 to 4 ft. Wave Detail: N 4 ft at 4 seconds and SW 2 ft at 5 seconds. .SAT AND SAT NIGHT...NE winds 15 to 20 kt, becoming SE around 10 kt. Seas 2 to 4 ft. .SUN AND SUN NIGHT...SE winds 10 to 15 kt, increasing to 15 to 20 kt. Seas 2 to 4 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. $$ ANZ232-170600- Nantucket Sound- 104 PM EDT Wed Sep 16 2026 .THIS AFTERNOON...SW winds around 10 kt. Seas around 2 ft. Wave Detail: SW 1 foot at 3 seconds and E 1 foot at 5 seconds. .TONIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW 1 foot at 3 seconds and W 1 foot at 3 seconds. .THU...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: W 1 foot at 3 seconds and NE 1 foot at 8 seconds. .THU NIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt after midnight. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 3 seconds and W 1 foot at 3 seconds. A chance of showers after midnight. .FRI...W winds 10 to 15 kt, becoming N in the afternoon. Gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 4 seconds and W 1 foot at 3 seconds. A chance of showers in the morning. .FRI NIGHT...N winds 10 to 15 kt, increasing to 15 to 20 kt after midnight. Seas 2 to 3 ft. Wave Detail: N 3 ft at 4 seconds and SW 1 foot at 5 seconds. .SAT AND SAT NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt, becoming SE 5 to 10 kt. Seas 2 to 3 ft. .SUN AND SUN NIGHT...SE winds 10 to 15 kt. Gusts up to 20 kt. Seas 2 to 3 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-170600- Vineyard Sound- 104 PM EDT Wed Sep 16 2026 .THIS AFTERNOON...SW winds around 10 kt. Seas around 2 ft. Wave Detail: SW 1 foot at 3 seconds and NW 1 foot at 4 seconds. .TONIGHT...SW winds 5 to 10 kt. Seas around 2 ft in the evening, then 1 foot or less. Wave Detail: W 1 foot at 3 seconds and E 1 foot at 5 seconds. .THU...SW winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft in the afternoon. Wave Detail: SW 1 foot at 3 seconds and E 1 foot at 8 seconds, becoming W 1 foot at 3 seconds and NE 1 foot at 8 seconds. .THU NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and E 1 foot at 7 seconds. A chance of showers after midnight. .FRI...W winds 10 to 15 kt with gusts up to 20 kt, becoming NW in the afternoon. Seas 2 to 3 ft. Wave Detail: W 3 ft at 4 seconds and E 1 foot at 7 seconds. A chance of showers in the morning. .FRI NIGHT...N winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: N 2 ft at 3 seconds and SW 2 ft at 5 seconds. .SAT AND SAT NIGHT...NE winds 10 to 15 kt, becoming SE 5 to 10 kt. Seas around 2 ft, then 1 foot or less. .SUN AND SUN NIGHT...SE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 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. $$ ANZ234-170600- Buzzards Bay- 104 PM EDT Wed Sep 16 2026 .THIS AFTERNOON...SW winds 10 to 15 kt. Seas around 2 ft. Wave Detail: SW 1 foot at 3 seconds and NW 1 foot at 4 seconds. .TONIGHT...SW winds 5 to 10 kt. Seas around 2 ft in the evening, then 1 foot or less. Wave Detail: W 1 foot at 4 seconds and E 1 foot at 5 seconds, becoming SW 1 foot at 3 seconds and E 1 foot at 5 seconds. .THU...SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 1 foot or less, then around 2 ft in the afternoon. Wave Detail: SW 1 foot at 3 seconds and E 1 foot at 8 seconds, becoming SW 1 foot at 3 seconds and NE 1 foot at 8 seconds. .THU NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and NE 1 foot at 7 seconds. A chance of showers after midnight. .FRI...W winds 10 to 15 kt with gusts up to 20 kt, becoming N 5 to 10 kt in the afternoon. Seas around 2 ft. Wave Detail: SW 2 ft at 5 seconds and W 1 foot at 3 seconds. A chance of showers in the morning. .FRI NIGHT...N winds 10 to 15 kt. Gusts up to 20 kt after midnight. Seas around 2 ft. Wave Detail: N 2 ft at 3 seconds and SW 1 foot at 5 seconds. .SAT AND SAT NIGHT...NE winds 10 to 15 kt, becoming SE 5 to 10 kt. Seas around 2 ft, then 1 foot or less. .SUN AND SUN NIGHT...SE winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-170600- Rhode Island Sound- 104 PM EDT Wed Sep 16 2026 .THIS AFTERNOON...SW winds around 10 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds and NW 1 foot at 4 seconds. .TONIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: W 2 ft at 3 seconds and E 1 foot at 5 seconds. .THU...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds and E 1 foot at 7 seconds. .THU NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and NE 1 foot at 7 seconds. A chance of showers after midnight. .FRI...W winds 10 to 15 kt with gusts up to 20 kt, becoming NW 5 to 10 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: W 3 ft at 4 seconds and E 1 foot at 7 seconds. A chance of showers in the morning. .FRI NIGHT...N winds 15 to 20 kt. Seas 2 to 3 ft. Wave Detail: N 3 ft at 3 seconds and SW 2 ft at 5 seconds. .SAT AND SAT NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt, becoming SE 5 to 10 kt. Seas 2 to 3 ft. .SUN AND SUN NIGHT...SE winds 10 to 15 kt, becoming E 15 to 20 kt. Seas 2 to 4 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. $$ ANZ237-170600- Block Island Sound- 104 PM EDT Wed Sep 16 2026 .THIS AFTERNOON...SW winds around 10 kt. Seas around 2 ft. Wave Detail: SW 1 foot at 3 seconds and E 1 foot at 5 seconds. .TONIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW 1 foot at 3 seconds and E 1 foot at 5 seconds. .THU...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: W 1 foot at 2 seconds and SW 1 foot at 4 seconds. .THU NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 3 seconds and E 1 foot at 8 seconds. .FRI...W winds 10 to 15 kt, becoming NW 5 to 10 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 4 seconds and N 1 foot at 5 seconds. .FRI NIGHT...N winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: NE 2 ft at 3 seconds and NW 1 foot at 3 seconds. .SAT AND SAT NIGHT...E winds 10 to 15 kt with gusts up to 20 kt, becoming SE 5 to 10 kt. Seas 2 to 3 ft. .SUN AND SUN NIGHT...SE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-170600- Boston Harbor- 104 PM EDT Wed Sep 16 2026 .THIS AFTERNOON...S winds 5 to 10 kt. Waves 1 foot or less. .TONIGHT...SW winds 5 to 10 kt, diminishing to around 5 kt after midnight. Waves 1 foot or less. .THU...N winds around 5 kt, becoming E in the afternoon. Waves 1 foot or less. .THU NIGHT...S winds 5 to 10 kt, becoming SW after midnight. Waves 1 foot or less. A chance of showers. .FRI AND FRI NIGHT...N winds around 10 kt with gusts up to 20 kt. Waves around 2 ft. .SAT AND SAT NIGHT...NE winds 5 to 10 kt, becoming S. Waves 1 foot or less. .SUN AND SUN NIGHT...SE winds 5 to 10 kt, becoming E. Waves 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. $$ ANZ236-170600- Narragansett Bay- 104 PM EDT Wed Sep 16 2026 .THIS AFTERNOON...SW winds around 10 kt. Waves around 2 ft. .TONIGHT...SW winds 5 to 10 kt. Waves around 2 ft in the evening, then 1 foot or less. .THU...SW winds 5 to 10 kt. Gusts up to 20 kt in the afternoon. Waves 1 foot or less, then around 2 ft in the afternoon. .THU NIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt after midnight. Waves around 2 ft. A chance of showers after midnight. .FRI...W winds around 10 kt, becoming N in the afternoon. Waves around 2 ft. A chance of showers in the morning. .FRI NIGHT...N winds 10 to 15 kt. Waves around 2 ft. .SAT AND SAT NIGHT...NE winds 5 to 10 kt, becoming SE. Waves around 2 ft, then 1 foot or less. .SUN AND SUN NIGHT...SE winds 10 to 15 kt, becoming E. Gusts up to 20 kt. Waves around 2 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ280-170600- Ocean Waters from the Merrimack River to Plymouth from 40 to 60 NM- 104 PM EDT Wed Sep 16 2026 .THIS AFTERNOON...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 3 seconds and E 2 ft at 9 seconds. .TONIGHT...SW winds 10 to 15 kt, diminishing to 5 to 10 kt after midnight. Seas 2 to 3 ft. Wave Detail: S 2 ft at 3 seconds and E 2 ft at 8 seconds. .THU...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds and E 2 ft at 8 seconds. .THU NIGHT...SW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and E 2 ft at 7 seconds. A chance of showers in the evening, then showers likely after midnight. .FRI...W winds 10 to 15 kt, becoming NW in the afternoon. Gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and W 2 ft at 4 seconds. Showers likely in the morning. .FRI NIGHT...N winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft, building to 4 to 5 ft after midnight. Wave Detail: N 4 ft at 5 seconds and SW 1 foot at 4 seconds, becoming N 4 ft at 6 seconds and SW 1 foot at 5 seconds. .SAT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. .SAT NIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft. .SUN AND SUN NIGHT...S winds 5 to 10 kt, becoming SE 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 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. $$ ANZ281-170600- Ocean Waters from Provincetown to Nantucket from 20 to 60 NM- 104 PM EDT Wed Sep 16 2026 .THIS AFTERNOON...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at 9 seconds and NE 2 ft at 7 seconds. .TONIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: NE 3 ft at 7 seconds and W 1 foot at 4 seconds. .THU...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: NE 2 ft at 7 seconds and E 2 ft at 8 seconds. .THU NIGHT...SW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and E 2 ft at 7 seconds. A chance of showers after midnight. .FRI...W winds around 15 kt, becoming NW in the afternoon. Gusts up to 20 kt. Seas around 3 ft. Wave Detail: SW 3 ft at 4 seconds and NW 3 ft at 4 seconds. A chance of showers in the morning. .FRI NIGHT...N winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: NE 5 ft at 7 seconds and N 3 ft at 4 seconds. .SAT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. .SAT NIGHT...E winds 5 to 10 kt. Seas 2 to 4 ft. .SUN...SE winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers. .SUN NIGHT...SE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ282-170600- Ocean Waters from Marthas Vineyard to Nantucket from 25 to 60 NM- 104 PM EDT Wed Sep 16 2026 .THIS AFTERNOON...SW winds around 5 kt. Seas 2 to 3 ft. Wave Detail: NE 3 ft at 6 seconds and SE 1 foot at 9 seconds. .TONIGHT...SW winds around 5 kt. Seas 2 to 3 ft. Wave Detail: NE 3 ft at 7 seconds and E 3 ft at 9 seconds. .THU...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 2 ft at 8 seconds and W 1 foot at 3 seconds. .THU NIGHT...S winds 5 to 10 kt, becoming SW 10 to 15 kt with gusts up to 20 kt after midnight. Seas 2 to 3 ft. Wave Detail: W 3 ft at 4 seconds and E 2 ft at 7 seconds. .FRI...W winds 10 to 15 kt, becoming NW in the afternoon. Gusts up to 20 kt. Seas 3 to 4 ft. Wave Detail: SW 3 ft at 5 seconds and NW 3 ft at 5 seconds. .FRI NIGHT...N winds 10 to 15 kt. Gusts up to 20 kt after midnight. Seas 3 to 4 ft. Wave Detail: NW 4 ft at 5 seconds and E 1 foot at 7 seconds. .SAT AND SAT NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt, becoming E 5 to 10 kt. Seas 3 to 4 ft. .SUN AND SUN NIGHT...SE winds 10 to 15 kt. Gusts up to 20 kt. Seas 3 to 5 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. $$ ANZ283-170600- Ocean Waters from Montauk NY to Marthas Vineyard from 25 to 60 NM- 104 PM EDT Wed Sep 16 2026 .THIS AFTERNOON...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 2 ft at 6 seconds and SW 1 foot at 3 seconds. .TONIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 2 ft at 8 seconds and SW 1 foot at 3 seconds. .THU...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and E 2 ft at 7 seconds. .THU NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: SW 3 ft at 5 seconds and E 2 ft at 8 seconds. .FRI...W winds around 15 kt, becoming NW in the afternoon. Gusts up to 20 kt. Seas 3 to 4 ft. Wave Detail: SW 4 ft at 5 seconds and NW 3 ft at 5 seconds. .FRI NIGHT...N winds 10 to 15 kt, becoming NE 15 to 20 kt after midnight. Seas 3 to 4 ft. Wave Detail: NE 4 ft at 6 seconds and SW 3 ft at 5 seconds. .SAT AND SAT NIGHT...NE winds 15 to 20 kt, becoming E around 10 kt. Seas 3 to 4 ft. .SUN AND SUN NIGHT...SE winds 10 to 15 kt, increasing to 15 to 20 kt. Seas 3 to 5 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ 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