Coastal Waters Forecast
Issued by NWS Boston, MA
Issued by NWS Boston, MA
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830 FZUS51 KBOX 130206 CWFBOX Coastal Waters Forecast for Massachusetts and Rhode Island National Weather Service Boston/Norton MA 1005 PM EDT Wed Aug 12 2026 Coastal waters from the Merrimack River MA to Watch Hill RI out to 60 NM ANZ200-131500- 1005 PM EDT Wed Aug 12 2026 .Synopsis for Massachusetts and Rhode Island coastal waters... Weak frontal boundaries will traverse the coastal waters through Fri, with little impact outside of scattered showers and thunderstorms. During this time, winds and seas will remain below advisory criteria. This weekend, brief high pres builds in from the NW, followed by low pres moving out of the northern Great Lakes late Sun into Mon, bringing a return to unsettled conditions. $$ ANZ250-131500- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 1005 PM EDT Wed Aug 12 2026 .OVERNIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: N 1 foot at 2 seconds and S 1 foot at 3 seconds. A slight chance of showers. .THU...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW 1 foot at 3 seconds and E 1 foot at 3 seconds. A chance of showers in the afternoon. .THU NIGHT...W winds 5 to 10 kt, becoming NW after midnight. Seas around 2 ft. Wave Detail: W 1 foot at 2 seconds and SE 1 foot at 3 seconds. A chance of showers in the evening. .FRI...NW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: N 2 ft at 3 seconds and S 1 foot at 4 seconds. .FRI NIGHT...W winds 5 to 10 kt, becoming N after midnight. Seas around 2 ft. Wave Detail: N 2 ft at 4 seconds and W 1 foot at 3 seconds. .SAT AND SAT NIGHT...W winds 5 to 10 kt. Seas around 2 ft. Wave Detail: N 2 ft at 4 seconds and S 1 foot at 7 seconds. .SUN...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. .SUN NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of showers. .MON...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of showers. .MON NIGHT...NE winds around 10 kt with gusts up to 20 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-131500- Massachusetts Bay and Ipswich Bay- 1005 PM EDT Wed Aug 12 2026 .OVERNIGHT...SW winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: NW 1 foot at 2 seconds and SE 1 foot at 3 seconds. A chance of showers. .THU...SW winds around 5 kt. Seas 1 foot or less. Wave Detail: W 1 foot at 2 seconds and SE 1 foot at 3 seconds. A chance of showers. .THU NIGHT...W winds 5 to 10 kt, becoming NW after midnight. Seas 1 foot or less. Wave Detail: W 1 foot at 2 seconds and SE 1 foot at 2 seconds. A chance of showers in the evening. .FRI...NW winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: S 1 foot at 3 seconds and N 1 foot at 3 seconds. .FRI NIGHT...NW winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft after midnight. Wave Detail: NW 1 foot at 2 seconds and NE 1 foot at 3 seconds, becoming NW 1 foot at 2 seconds and N 1 foot at 3 seconds. .SAT AND SAT NIGHT...W winds 5 to 10 kt. Seas around 2 ft. Wave Detail: NW 2 ft at 3 seconds and S 1 foot at 3 seconds. .SUN...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. .SUN NIGHT AND MON...S winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. A chance of showers. .MON NIGHT...N 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. $$ ANZ231-131500- Cape Cod Bay- 1005 PM EDT Wed Aug 12 2026 .OVERNIGHT...SW winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: S 1 foot at 2 seconds and N 1 foot at 3 seconds. A chance of showers. .THU...SW winds around 5 kt. Seas 1 foot or less. Wave Detail: SW 1 foot at 2 seconds and E 1 foot at 3 seconds. A chance of showers in the morning. .THU NIGHT...W winds around 5 kt, becoming NW after midnight. Seas 1 foot or less, then around 2 ft after midnight. Wave Detail: W 1 foot at 2 seconds and S 1 foot at 3 seconds, becoming NW 1 foot at 2 seconds and E 1 foot at 2 seconds. .FRI...NW winds 5 to 10 kt, becoming N in the afternoon. Seas around 2 ft in the morning, then 1 foot or less. Wave Detail: N 1 foot at 3 seconds and S 1 foot at 5 seconds. .FRI NIGHT AND SAT...NE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: N 1 foot at 3 seconds and S 1 foot at 4 seconds. .SAT NIGHT...S winds around 5 kt, becoming SW around 5 kt after midnight. Seas 1 foot or less. Wave Detail: N 1 foot at 4 seconds and S 1 foot at 7 seconds. .SUN...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. .SUN NIGHT AND MON...S winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. A chance of showers. .MON NIGHT...NE winds 5 to 10 kt. Seas around 2 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-131500- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 NM- 1005 PM EDT Wed Aug 12 2026 .OVERNIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S 2 ft at 4 seconds and NE 1 foot at 3 seconds. A slight chance of showers. .THU...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S 2 ft at 5 seconds and NW 1 foot at 3 seconds. A chance of showers in the morning. .THU NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas around 2 ft. Wave Detail: S 2 ft at 5 seconds and W 1 foot at 3 seconds. .FRI...NW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: N 2 ft at 3 seconds and S 1 foot at 5 seconds. .FRI NIGHT AND SAT...N winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: NW 2 ft at 4 seconds and N 2 ft at 4 seconds. .SAT NIGHT...W winds 5 to 10 kt. Seas around 2 ft. Wave Detail: N 2 ft at 4 seconds and S 1 foot at 6 seconds. .SUN...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. .SUN NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. A chance of showers. .MON...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. A chance of showers. .MON NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 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. $$ ANZ255-131500- Coastal Waters extending out to 25 NM South of Marthas Vineyard and Nantucket- 1005 PM EDT Wed Aug 12 2026 .OVERNIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and E 1 foot at 3 seconds. A slight chance of showers with isolated tstms. .THU...SW winds 10 to 15 kt. Seas around 2 ft. Wave Detail: W 2 ft at 6 seconds and NE 1 foot at 3 seconds. A chance of showers in the morning. .THU NIGHT...W winds around 10 kt, becoming NW after midnight. Seas around 2 ft. Wave Detail: SW 2 ft at 5 seconds and N 1 foot at 3 seconds. .FRI...N winds 5 to 10 kt, becoming W in the afternoon. Seas around 2 ft. Wave Detail: SW 2 ft at 5 seconds and N 1 foot at 3 seconds. .FRI NIGHT AND SAT...NE winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: N 2 ft at 3 seconds and SW 2 ft at 6 seconds. .SAT NIGHT...SE winds around 5 kt, becoming SW after midnight. Seas around 2 ft. Wave Detail: NW 1 foot at 3 seconds and NE 1 foot at 4 seconds. .SUN...SW winds 10 to 15 kt. Seas around 2 ft. .SUN NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 6 ft. A chance of showers. .MON...SW winds 15 to 20 kt. Seas 5 to 7 ft. A chance of showers. .MON NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. A chance of showers. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-131500- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 NM South of Block Island- 1005 PM EDT Wed Aug 12 2026 .OVERNIGHT...SW winds around 10 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and E 1 foot at 3 seconds. Isolated tstms. A slight chance of showers, then a chance of showers. .THU...SW winds 10 to 15 kt. Seas around 2 ft. Wave Detail: W 2 ft at 5 seconds and NE 1 foot at 3 seconds. A chance of showers in the morning. .THU NIGHT...W winds around 10 kt, becoming NW after midnight. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and N 1 foot at 3 seconds. .FRI...N winds 5 to 10 kt, becoming W in the afternoon. Seas around 2 ft. Wave Detail: S 2 ft at 5 seconds and N 1 foot at 3 seconds. .FRI NIGHT...W winds 5 to 10 kt, becoming N 10 to 15 kt after midnight. Seas 2 to 3 ft. Wave Detail: NW 2 ft at 3 seconds and S 2 ft at 6 seconds. .SAT AND SAT NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: NW 2 ft at 3 seconds and N 2 ft at 3 seconds. .SUN...SW winds 10 to 15 kt. Seas 2 to 3 ft. .SUN NIGHT...SW winds 15 to 20 kt. Seas 4 to 6 ft. A chance of showers. .MON...SW winds around 15 kt with gusts up to 20 kt. Seas 5 to 7 ft. A chance of showers. .MON NIGHT...N winds 10 to 15 kt. Seas 3 to 5 ft. A chance of showers. Winds and seas 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. $$ ANZ232-131500- Nantucket Sound- 1005 PM EDT Wed Aug 12 2026 .OVERNIGHT...SW winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: SW 1 foot at 3 seconds and E 1 foot at 3 seconds. A slight chance of showers with isolated tstms. .THU...SW winds 10 to 15 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds and NE 1 foot at 3 seconds. A chance of showers in the morning. .THU NIGHT...W winds around 10 kt, becoming NW after midnight. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and NE 1 foot at 3 seconds. .FRI...NW winds around 10 kt, becoming W in the afternoon. Seas around 2 ft in the morning, then 1 foot or less. Wave Detail: N 1 foot at 3 seconds and SW 1 foot at 5 seconds, becoming NW 1 foot at 2 seconds and N 1 foot at 3 seconds. .FRI NIGHT AND SAT...NE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: W 1 foot at 2 seconds and NE 1 foot at 3 seconds. .SAT NIGHT...S winds around 5 kt, becoming SW after midnight. Seas 1 foot or less. Wave Detail: NW 1 foot at 2 seconds and NE 1 foot at 3 seconds. .SUN...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. .SUN NIGHT AND MON...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. A chance of showers. .MON NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of showers. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-131500- Vineyard Sound- 1005 PM EDT Wed Aug 12 2026 .OVERNIGHT...SW winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: W 1 foot at 2 seconds and SW 1 foot at 5 seconds. A chance of showers with isolated tstms. .THU...SW winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Seas 1 foot or less, then around 2 ft in the afternoon. Wave Detail: NE 1 foot at 3 seconds and SW 1 foot at 4 seconds, becoming SW 2 ft at 5 seconds and NE 1 foot at 2 seconds. A chance of showers in the morning. .THU NIGHT...W winds around 10 kt, becoming NW after midnight. Seas around 2 ft. Wave Detail: SW 2 ft at 5 seconds and SW 1 foot at 2 seconds. .FRI...NW winds 5 to 10 kt, becoming W in the afternoon. Seas around 2 ft in the morning, then 1 foot or less. Wave Detail: SW 2 ft at 5 seconds and N 1 foot at 2 seconds, becoming W 1 foot at 2 seconds and N 1 foot at 2 seconds. .FRI NIGHT...W winds 5 to 10 kt, becoming N after midnight. Seas 1 foot or less, then around 2 ft after midnight. Wave Detail: SW 1 foot at 3 seconds and NE 1 foot at 3 seconds, becoming NW 1 foot at 3 seconds and N 1 foot at 4 seconds. .SAT AND SAT NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: N 1 foot at 2 seconds and NW 1 foot at 3 seconds. .SUN...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. .SUN NIGHT AND MON...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. A chance of showers. .MON NIGHT...NE winds 10 to 15 kt. Seas 2 to 3 ft. A chance of showers. Winds and seas 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. $$ ANZ234-131500- Buzzards Bay- 1005 PM EDT Wed Aug 12 2026 .OVERNIGHT...SW winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: E 1 foot at 3 seconds and SW 1 foot at 4 seconds. A chance of showers with isolated tstms. .THU...SW winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Seas 1 foot or less, then around 2 ft in the afternoon. Wave Detail: NE 1 foot at 3 seconds and SW 1 foot at 5 seconds, becoming SW 2 ft at 5 seconds and NE 1 foot at 2 seconds. A chance of showers in the morning. .THU NIGHT...W winds 5 to 10 kt, becoming NW after midnight. Seas around 2 ft in the evening, then 1 foot or less. Wave Detail: SW 2 ft at 4 seconds and NE 1 foot at 3 seconds, becoming NW 1 foot at 2 seconds and NE 1 foot at 2 seconds. .FRI...NW winds 5 to 10 kt, becoming W in the afternoon. Seas 1 foot or less, then around 2 ft in the afternoon. Wave Detail: N 1 foot at 2 seconds and SW 1 foot at 5 seconds, becoming N 1 foot at 3 seconds and SW 1 foot at 4 seconds. .FRI NIGHT...W winds 5 to 10 kt, becoming N after midnight. Seas 1 foot or less. Wave Detail: NE 1 foot at 3 seconds and SW 1 foot at 4 seconds. .SAT AND SAT NIGHT...SW winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: N 1 foot at 2 seconds and NW 1 foot at 3 seconds. .SUN...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. .SUN NIGHT THROUGH MON NIGHT...NE winds 15 to 20 kt. Seas 2 to 4 ft. A chance of showers. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-131500- Rhode Island Sound- 1005 PM EDT Wed Aug 12 2026 .OVERNIGHT...SW winds around 10 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and E 1 foot at 5 seconds. A slight chance of showers, then a chance of showers with isolated tstms. .THU...SW winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Seas around 2 ft. Wave Detail: S 2 ft at 7 seconds and NE 1 foot at 3 seconds. A chance of showers in the morning. .THU NIGHT...W winds around 10 kt, becoming NW after midnight. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and N 1 foot at 3 seconds. .FRI...N winds 5 to 10 kt, becoming W in the afternoon. Seas around 2 ft. Wave Detail: S 2 ft at 5 seconds and N 1 foot at 2 seconds. .FRI NIGHT...W winds 5 to 10 kt, becoming N after midnight. Seas around 2 ft. Wave Detail: N 2 ft at 3 seconds and W 2 ft at 3 seconds. .SAT AND SAT NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S 2 ft at 5 seconds and N 1 foot at 3 seconds. .SUN...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. .SUN NIGHT...SW winds around 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. A chance of showers. .MON...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 6 ft. A chance of showers. .MON NIGHT...NE winds 10 to 15 kt. Seas 2 to 4 ft. A chance of showers. Winds and seas 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. $$ ANZ237-131500- Block Island Sound- 1005 PM EDT Wed Aug 12 2026 .OVERNIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: W 1 foot at 2 seconds and E 1 foot at 2 seconds. Isolated tstms. A slight chance of showers, then a chance of showers. .THU...SW winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft in the afternoon. Wave Detail: NE 1 foot at 3 seconds and SW 1 foot at 4 seconds, becoming SW 2 ft at 4 seconds and NE 1 foot at 2 seconds. A chance of showers in the morning. .THU NIGHT...W winds 5 to 10 kt, becoming NW after midnight. Seas around 2 ft. Wave Detail: S 2 ft at 5 seconds and N 1 foot at 2 seconds. .FRI...NW winds 5 to 10 kt, becoming W in the afternoon. Seas around 2 ft. Wave Detail: N 1 foot at 3 seconds and S 1 foot at 5 seconds. .FRI NIGHT...W winds 5 to 10 kt, becoming N after midnight. Seas around 2 ft. Wave Detail: N 1 foot at 2 seconds and W 1 foot at 3 seconds. .SAT AND SAT NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: NE 1 foot at 2 seconds and NW 1 foot at 3 seconds. .SUN...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. .SUN NIGHT AND MON...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. A chance of showers. .MON NIGHT...N winds 5 to 10 kt. Seas 2 to 4 ft. A chance of showers. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-131500- Boston Harbor- 1005 PM EDT Wed Aug 12 2026 .OVERNIGHT...SW winds around 5 kt. Waves 1 foot or less. A chance of showers. .THU...SW winds around 5 kt. Waves 1 foot or less. A chance of showers. .THU NIGHT...NW winds 5 to 10 kt. Waves 1 foot or less. A chance of showers in the evening. .FRI...NW winds 5 to 10 kt. Waves 1 foot or less. .FRI NIGHT...NW winds 5 to 10 kt. Waves 1 foot or less. .SAT AND SAT NIGHT...W winds 5 to 10 kt. Waves 1 foot or less. .SUN...SW winds 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft. .SUN NIGHT AND MON...S winds 10 to 15 kt. Gusts up to 20 kt. Waves around 2 ft. A chance of showers. .MON NIGHT...N winds 5 to 10 kt. Waves 1 foot or less. 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. $$ ANZ236-131500- Narragansett Bay- 1005 PM EDT Wed Aug 12 2026 .OVERNIGHT...SW winds around 5 kt. Waves 1 foot or less. A slight chance of showers, then a chance of showers with isolated tstms. .THU...SW winds 5 to 10 kt. Waves 1 foot or less, then around 2 ft in the afternoon. A chance of showers in the morning. .THU NIGHT...W winds 5 to 10 kt, becoming NW after midnight. Waves 1 foot or less. .FRI...NW winds around 5 kt, becoming W in the afternoon. Waves 1 foot or less. .FRI NIGHT...W winds 5 to 10 kt, becoming N after midnight. Waves 1 foot or less. .SAT AND SAT NIGHT...SW winds 5 to 10 kt. Waves 1 foot or less. .SUN...SW winds 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft. .SUN NIGHT AND MON...SW winds 10 to 15 kt with gusts up to 20 kt. Waves 2 to 4 ft. A chance of showers. .MON NIGHT...N winds 5 to 10 kt. Waves 2 to 3 ft. A chance of showers. Winds and waves higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ280-131500- Ocean Waters from the Merrimack River to Plymouth from 40 to 60 NM- 1005 PM EDT Wed Aug 12 2026 .OVERNIGHT...SW winds around 10 kt. Seas around 2 ft. Wave Detail: W 2 ft at 4 seconds and SE 1 foot at 8 seconds. A slight chance of showers. .THU...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and SE 1 foot at 4 seconds. .THU NIGHT...W winds 5 to 10 kt, becoming NW 10 to 15 kt with gusts up to 20 kt after midnight. Seas around 2 ft. Wave Detail: NW 2 ft at 3 seconds and SE 1 foot at 4 seconds. .FRI...NW winds 10 to 15 kt with gusts up to 20 kt, becoming W 5 to 10 kt in the afternoon. Seas around 2 ft. Wave Detail: N 2 ft at 4 seconds and S 1 foot at 5 seconds. .FRI NIGHT AND SAT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: W 2 ft at 4 seconds and N 2 ft at 5 seconds. .SAT NIGHT...W winds 5 to 10 kt. Seas around 2 ft. Wave Detail: N 1 foot at 4 seconds and S 1 foot at 7 seconds. .SUN...SW winds 5 to 10 kt. Seas around 2 ft. .SUN NIGHT THROUGH MON NIGHT...NW winds 10 to 15 kt with gusts up to 25 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. $$ ANZ281-131500- Ocean Waters from Provincetown to Nantucket from 20 to 60 NM- 1005 PM EDT Wed Aug 12 2026 .OVERNIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 5 seconds and NW 1 foot at 3 seconds. .THU...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 6 seconds and NW 1 foot at 3 seconds. .THU NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas 2 to 3 ft. Wave Detail: W 2 ft at 4 seconds and SE 1 foot at 10 seconds. .FRI...NW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: N 2 ft at 4 seconds and S 2 ft at 6 seconds. .FRI NIGHT AND SAT...N winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: N 2 ft at 5 seconds and S 2 ft at 6 seconds. .SAT NIGHT...W winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: N 2 ft at 4 seconds and S 1 foot at 6 seconds. .SUN...SW winds 5 to 10 kt. Seas 2 to 3 ft. .SUN NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 6 ft. A chance of showers. .MON...SW winds 10 to 15 kt with gusts up to 25 kt. Seas 5 to 7 ft. A chance of showers. .MON NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 5 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ282-131500- Ocean Waters from Marthas Vineyard to Nantucket from 25 to 60 NM- 1005 PM EDT Wed Aug 12 2026 .OVERNIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: W 2 ft at 5 seconds and E 1 foot at 8 seconds. .THU...SW winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 5 seconds and SE 1 foot at 9 seconds. .THU NIGHT...W winds around 10 kt, becoming NW after midnight. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 5 seconds and SE 1 foot at 10 seconds. .FRI...NW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: N 2 ft at 4 seconds and SW 2 ft at 6 seconds. .FRI NIGHT AND SAT...N winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: NW 2 ft at 4 seconds and N 2 ft at 5 seconds. .SAT NIGHT...N winds around 5 kt, becoming W after midnight. Seas 2 to 3 ft. Wave Detail: N 1 foot at 4 seconds and S 1 foot at 6 seconds. .SUN...SW winds 5 to 10 kt. Seas 2 to 3 ft. .SUN NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 5 to 8 ft. A chance of showers. .MON...SW winds around 15 kt with gusts up to 20 kt. Seas 6 to 9 ft. A chance of showers. .MON NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas 4 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. $$ ANZ283-131500- Ocean Waters from Montauk NY to Marthas Vineyard from 25 to 60 NM- 1005 PM EDT Wed Aug 12 2026 .OVERNIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: W 2 ft at 4 seconds and S 2 ft at 7 seconds. A slight chance of showers with isolated tstms. .THU...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 5 seconds and NE 1 foot at 3 seconds. A chance of showers in the morning. .THU NIGHT...W winds around 10 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 5 seconds and NE 1 foot at 3 seconds. .FRI...N winds 5 to 10 kt, becoming NW in the afternoon. Seas around 2 ft. Wave Detail: N 2 ft at 4 seconds and S 2 ft at 6 seconds. .FRI NIGHT AND SAT...NE winds 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: W 2 ft at 3 seconds and N 2 ft at 4 seconds. .SAT NIGHT...SE winds around 5 kt, becoming SW after midnight. Seas around 2 ft. Wave Detail: N 1 foot at 4 seconds and S 1 foot at 6 seconds. .SUN...SW winds 10 to 15 kt. Seas 2 to 4 ft. .SUN NIGHT AND MON...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 5 to 8 ft. A chance of showers. .MON NIGHT...N winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 5 ft. A chance of showers. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ 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