Coastal Waters Forecast
Issued by NWS Boston, MA
Issued by NWS Boston, MA
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271 FZUS51 KBOX 300205 CWFBOX Coastal Waters Forecast for Massachusetts and Rhode Island National Weather Service Boston/Norton MA 1005 PM EDT Tue Sep 29 2026 Coastal waters from the Merrimack River MA to Watch Hill RI out to 60 NM ANZ200-301500- 1005 PM EDT Tue Sep 29 2026 .Synopsis for Massachusetts and Rhode Island coastal waters... High pressure builds across the area Wednesday and then moves southeastward and into the Atlantic through Friday. $$ ANZ250-301500- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 1005 PM EDT Tue Sep 29 2026 .OVERNIGHT...NW winds around 5 kt. Seas 3 to 4 ft. Wave Detail: E 3 ft at 9 seconds and N 2 ft at 4 seconds. .WED...N winds around 5 kt. Seas 3 to 4 ft. Wave Detail: E 3 ft at 9 seconds and N 1 foot at 3 seconds. .WED NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at 9 seconds and SW 1 foot at 2 seconds. .THU...SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: E 3 ft at 9 seconds and SW 2 ft at 3 seconds. .THU NIGHT AND FRI...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and E 2 ft at 9 seconds. .FRI NIGHT...SW winds 10 to 15 kt, becoming NW after midnight. Gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: NW 2 ft at 3 seconds and E 2 ft at 8 seconds. A chance of showers. .SAT AND SAT NIGHT...N winds 10 to 15 kt with gusts up to 20 kt, becoming NE 5 to 10 kt. Seas 2 to 3 ft. .SUN AND SUN NIGHT...E winds 5 to 10 kt, becoming SW. Seas 2 to 3 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-301500- Massachusetts Bay and Ipswich Bay- 1005 PM EDT Tue Sep 29 2026 .OVERNIGHT...NW winds around 5 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at 9 seconds and N 2 ft at 4 seconds. .WED...NW winds around 5 kt, becoming E in the afternoon. Seas 2 to 3 ft. Wave Detail: E 3 ft at 9 seconds and SE 2 ft at 14 seconds. .WED NIGHT...S winds 5 to 10 kt, becoming SW after midnight. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 8 seconds and E 3 ft at 9 seconds. .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 3 seconds and E 2 ft at 9 seconds. .THU NIGHT AND FRI...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 4 seconds and E 2 ft at 9 seconds. .FRI NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, becoming NW after midnight. Seas around 2 ft. Wave Detail: NW 2 ft at 3 seconds and E 2 ft at 11 seconds. A chance of showers. .SAT AND SAT NIGHT...N winds 10 to 15 kt, becoming NE 5 to 10 kt. Seas around 2 ft. .SUN AND SUN NIGHT...E winds 5 to 10 kt, becoming W. 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. $$ ANZ231-301500- Cape Cod Bay- 1005 PM EDT Tue Sep 29 2026 .OVERNIGHT...Light and variable winds, becoming NW around 5 kt. Seas around 2 ft. Wave Detail: E 2 ft at 9 seconds and N 1 foot at 5 seconds. .WED...N winds around 5 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 13 seconds and N 1 foot at 5 seconds. .WED NIGHT...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 6 seconds and SW 1 foot at 3 seconds. .THU...SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds and NE 1 foot at 4 seconds. .THU NIGHT AND FRI...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 3 seconds and NE 1 foot at 5 seconds. .FRI NIGHT...SW winds 10 to 15 kt, becoming W after midnight. Gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: W 1 foot at 2 seconds and SE 1 foot at 3 seconds. A chance of showers. .SAT...N winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of showers. .SAT NIGHT...NE winds 5 to 10 kt. Seas around 2 ft. .SUN AND SUN NIGHT...E winds 5 to 10 kt, becoming SW. Seas around 2 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-301500- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 NM- 1005 PM EDT Tue Sep 29 2026 .OVERNIGHT...NW winds around 5 kt. Seas 3 to 4 ft. Wave Detail: E 3 ft at 9 seconds and S 2 ft at 6 seconds. .WED...N winds around 5 kt. Seas 3 to 4 ft. Wave Detail: E 3 ft at 9 seconds and N 1 foot at 5 seconds. .WED NIGHT...S winds around 5 kt, becoming SW after midnight. Seas 2 to 4 ft. Wave Detail: E 3 ft at 9 seconds and SW 1 foot at 4 seconds. Patchy fog after midnight with vsby 1 NM or less. .THU...SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: E 3 ft at 9 seconds and SW 2 ft at 3 seconds. Patchy fog in the morning with vsby 1 NM or less. .THU NIGHT AND FRI...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. Wave Detail: SW 3 ft at 4 seconds and E 2 ft at 9 seconds. .FRI NIGHT...SW winds around 15 kt, becoming W after midnight. Gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: S 3 ft at 6 seconds and NW 2 ft at 3 seconds. A chance of showers after midnight. .SAT...N winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. A chance of showers. .SAT NIGHT...NE winds 10 to 15 kt. Seas 2 to 3 ft. .SUN AND SUN NIGHT...E winds 10 to 15 kt, becoming SW. 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. $$ ANZ255-301500- Coastal Waters extending out to 25 NM South of Marthas Vineyard and Nantucket- 1005 PM EDT Tue Sep 29 2026 .OVERNIGHT...NW winds around 5 kt. Seas 2 to 3 ft. Wave Detail: S 2 ft at 6 seconds and NE 2 ft at 6 seconds. .WED...N winds around 5 kt, becoming W around 5 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: E 3 ft at 9 seconds and S 2 ft at 6 seconds. .WED NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at 9 seconds and SW 1 foot at 4 seconds. Patchy fog. Vsby 1 to 3 NM, decreasing to 1 NM or less after midnight. .THU...SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: S 3 ft at 7 seconds and SW 2 ft at 3 seconds. Patchy fog in the morning with vsby 1 to 3 NM. .THU NIGHT AND FRI...SW winds around 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. Wave Detail: SW 4 ft at 5 seconds and E 2 ft at 9 seconds. .FRI NIGHT...SW winds 15 to 20 kt, becoming W after midnight. Seas 3 to 5 ft. Wave Detail: SW 4 ft at 7 seconds and E 1 foot at 2 seconds. A chance of showers after midnight. .SAT...N winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. A chance of showers. .SAT NIGHT...NE winds 10 to 15 kt. Seas 2 to 3 ft. .SUN AND SUN NIGHT...E winds 10 to 15 kt with gusts up to 20 kt, becoming SW. Seas 2 to 4 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-301500- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 NM South of Block Island- 1005 PM EDT Tue Sep 29 2026 .OVERNIGHT...NW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: NE 2 ft at 4 seconds and S 2 ft at 6 seconds. .WED...N winds around 5 kt, becoming W in the afternoon. Seas 2 to 3 ft. Wave Detail: E 2 ft at 9 seconds and N 1 foot at 4 seconds. .WED NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 3 seconds and S 2 ft at 7 seconds. .THU...SW winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 7 seconds and SW 2 ft at 3 seconds. .THU NIGHT AND FRI...SW winds around 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. Wave Detail: SW 4 ft at 5 seconds and E 2 ft at 9 seconds. .FRI NIGHT...SW winds 15 to 20 kt, becoming W after midnight. Gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: SW 4 ft at 6 seconds and NW 2 ft at 3 seconds. A chance of showers after midnight. .SAT...N winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. A chance of showers. .SAT NIGHT...E winds 10 to 15 kt with gusts up to 20 kt. Seas around 3 ft. .SUN AND SUN NIGHT...E winds 10 to 15 kt with gusts up to 20 kt, becoming W. 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. $$ ANZ232-301500- Nantucket Sound- 1005 PM EDT Tue Sep 29 2026 .OVERNIGHT...NW winds around 5 kt. Seas around 2 ft. Wave Detail: NE 2 ft at 5 seconds and W 1 foot at 3 seconds. .WED...N winds around 5 kt, becoming S around 5 kt in the afternoon. Seas around 2 ft. Wave Detail: NE 1 foot at 5 seconds and W 1 foot at 5 seconds. .WED NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: N 1 foot at 4 seconds and SW 1 foot at 5 seconds. Patchy fog after midnight with vsby 1 NM or less. .THU...SW winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and NE 1 foot at 4 seconds. Patchy fog in the morning with vsby 1 NM or less. .THU NIGHT AND FRI...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 4 seconds and NE 1 foot at 6 seconds. .FRI NIGHT...SW winds 15 to 20 kt, becoming W 10 to 15 kt after midnight. Seas 2 to 3 ft. Wave Detail: W 2 ft at 3 seconds and SW 2 ft at 6 seconds. A chance of showers after midnight. .SAT...N winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of showers. .SAT NIGHT...NE winds 10 to 15 kt. Seas around 2 ft. .SUN AND SUN NIGHT...E winds 10 to 15 kt, becoming SW. Seas 2 to 3 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-301500- Vineyard Sound- 1005 PM EDT Tue Sep 29 2026 .OVERNIGHT...NW winds around 5 kt. Seas around 2 ft. Wave Detail: E 2 ft at 5 seconds and W 1 foot at 3 seconds. .WED...N winds around 5 kt, becoming SW in the afternoon. Seas 1 foot or less. Wave Detail: N 1 foot at 4 seconds and SW 1 foot at 6 seconds. .WED NIGHT...SW winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft after midnight. Wave Detail: SW 1 foot at 3 seconds and NE 1 foot at 5 seconds, becoming SW 1 foot at 3 seconds and NE 1 foot at 4 seconds. .THU...SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 5 seconds and NE 1 foot at 5 seconds. .THU NIGHT AND FRI...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 5 seconds and NE 1 foot at 7 seconds. .FRI NIGHT...SW winds around 15 kt, becoming W after midnight. Gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 6 seconds and SW 1 foot at 2 seconds. A chance of showers. .SAT...N winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of showers. .SAT NIGHT...NE winds 5 to 10 kt. Seas around 2 ft. .SUN AND SUN NIGHT...E winds 10 to 15 kt, becoming W 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. $$ ANZ234-301500- Buzzards Bay- 1005 PM EDT Tue Sep 29 2026 .OVERNIGHT...N winds around 5 kt. Seas 1 foot or less. Wave Detail: SW 1 foot at 4 seconds and NE 1 foot at 5 seconds. .WED...N winds around 5 kt, becoming SW in the afternoon. Seas 1 foot or less. Wave Detail: S 1 foot at 5 seconds and N 1 foot at 5 seconds. .WED NIGHT...SW winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: SW 1 foot at 3 seconds and S 1 foot at 5 seconds. .THU...SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 4 seconds and NE 1 foot at 4 seconds. Patchy fog in the morning with vsby 1 to 3 NM. .THU NIGHT AND FRI...SW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: SW 3 ft at 3 seconds and SW 3 ft at 6 seconds. .FRI NIGHT...SW winds around 15 kt, becoming W after midnight. Gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: SW 3 ft at 6 seconds and SW 2 ft at 4 seconds. A chance of showers. .SAT...N winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. A chance of showers. .SAT NIGHT...NE winds 5 to 10 kt. Seas around 2 ft. .SUN AND SUN NIGHT...E winds around 10 kt, becoming W. Seas around 2 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-301500- Rhode Island Sound- 1005 PM EDT Tue Sep 29 2026 .OVERNIGHT...NW winds around 5 kt, becoming N. Seas around 2 ft. Wave Detail: E 2 ft at 5 seconds and S 2 ft at 6 seconds. .WED...N winds around 5 kt, becoming SW in the afternoon. Seas around 2 ft. Wave Detail: SE 2 ft at 9 seconds and N 1 foot at 4 seconds. .WED NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 9 seconds and SW 1 foot at 3 seconds. .THU...SW winds around 10 kt, increasing to around 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and NE 1 foot at 5 seconds. .THU NIGHT AND FRI...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: SW 4 ft at 5 seconds and NE 1 foot at 7 seconds. .FRI NIGHT...SW winds 15 to 20 kt, becoming W 10 to 15 kt after midnight. Seas 2 to 4 ft. Wave Detail: SW 4 ft at 7 seconds and W 2 ft at 3 seconds. A chance of showers. .SAT...N winds 10 to 15 kt. Seas 2 to 3 ft. A chance of showers. .SAT NIGHT...NE winds 10 to 15 kt. Seas 2 to 3 ft. .SUN AND SUN NIGHT...E winds 10 to 15 kt, becoming NW. 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. $$ ANZ237-301500- Block Island Sound- 1005 PM EDT Tue Sep 29 2026 .OVERNIGHT...NW winds around 5 kt. Seas around 2 ft. Wave Detail: NE 2 ft at 4 seconds and W 1 foot at 3 seconds. .WED...N winds around 5 kt, becoming SW around 5 kt in the afternoon. Seas around 2 ft. Wave Detail: SE 2 ft at 9 seconds and N 1 foot at 4 seconds. .WED NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 9 seconds and SW 1 foot at 2 seconds. .THU...SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 3 seconds and S 2 ft at 6 seconds. .THU NIGHT AND FRI...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: S 3 ft at 6 seconds and W 1 foot at 3 seconds. .FRI NIGHT...SW winds 10 to 15 kt, becoming W after midnight. Gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: SE 3 ft at 7 seconds and W 1 foot at 3 seconds. A chance of showers. .SAT...NE winds 10 to 15 kt. Seas 2 to 3 ft. A chance of showers. .SAT NIGHT...E winds 10 to 15 kt. Seas 2 to 3 ft. .SUN AND SUN NIGHT...E winds 10 to 15 kt with gusts up to 20 kt, becoming N. Seas 2 to 3 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-301500- Boston Harbor- 1005 PM EDT Tue Sep 29 2026 .OVERNIGHT...NW winds around 5 kt. Waves 1 foot or less. .WED...NW winds around 5 kt, becoming E in the afternoon. Waves 1 foot or less. .WED NIGHT...S winds 5 to 10 kt, becoming SW after midnight. Waves 1 foot or less. Patchy fog after midnight with vsby 1 to 3 NM. .THU...SW winds 5 to 10 kt. Waves 1 foot or less, then around 2 ft in the afternoon. Patchy fog in the morning with vsby 1 to 3 NM. .THU NIGHT AND FRI...SW winds 5 to 10 kt with gusts up to 20 kt. Waves around 2 ft. .FRI NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, becoming NW after midnight. Waves around 2 ft in the evening, then 1 foot or less. A chance of showers. .SAT AND SAT NIGHT...N winds 5 to 10 kt, becoming NE. Waves 1 foot or less. .SUN AND SUN NIGHT...E winds 5 to 10 kt, becoming NW. 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. $$ ANZ236-301500- Narragansett Bay- 1005 PM EDT Tue Sep 29 2026 .OVERNIGHT...NW winds around 5 kt. Waves around 2 ft. .WED...N winds around 5 kt, becoming S in the afternoon. Waves 1 foot or less. .WED NIGHT...SW winds 5 to 10 kt. Waves 1 foot or less. .THU...SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Waves around 2 ft. .THU NIGHT AND FRI...SW winds 10 to 15 kt with gusts up to 20 kt. Waves 2 to 3 ft. .FRI NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, becoming W after midnight. Waves 2 to 3 ft. A chance of showers. .SAT...N winds 5 to 10 kt. Waves around 2 ft. A chance of showers. .SAT NIGHT...NE winds 5 to 10 kt. Waves around 2 ft. .SUN AND SUN NIGHT...E winds 5 to 10 kt, becoming N. Waves around 2 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ280-301500- Ocean Waters from the Merrimack River to Plymouth from 40 to 60 NM- 1005 PM EDT Tue Sep 29 2026 .OVERNIGHT...N winds 5 to 10 kt. Seas around 4 ft. Wave Detail: N 3 ft at 4 seconds and E 3 ft at 9 seconds. .WED...N winds 5 to 10 kt, becoming NW in the afternoon. Seas 3 to 4 ft. Wave Detail: E 3 ft at 9 seconds and N 2 ft at 4 seconds. .WED NIGHT...SW winds 5 to 10 kt. Seas around 3 ft. Wave Detail: E 3 ft at 9 seconds and SW 1 foot at 3 seconds. .THU...SW winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Seas 3 to 4 ft. Wave Detail: SW 3 ft at 4 seconds and E 3 ft at 9 seconds. .THU NIGHT AND FRI...SW winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to 4 ft. Wave Detail: SW 4 ft at 5 seconds and E 2 ft at 9 seconds. .FRI NIGHT...SW winds around 15 kt, becoming NW after midnight. Gusts up to 25 kt. Seas 3 to 4 ft. Wave Detail: NW 3 ft at 4 seconds and S 2 ft at 6 seconds. A chance of showers. .SAT AND SAT NIGHT...N winds 10 to 15 kt with gusts up to 20 kt, becoming NE. Seas 2 to 4 ft. .SUN AND SUN NIGHT...E winds 10 to 15 kt, becoming S. 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. $$ ANZ281-301500- Ocean Waters from Provincetown to Nantucket from 20 to 60 NM- 1005 PM EDT Tue Sep 29 2026 .OVERNIGHT...NW winds 5 to 10 kt. Seas 4 to 5 ft. Wave Detail: E 4 ft at 9 seconds and N 2 ft at 5 seconds. .WED...NW winds 5 to 10 kt, diminishing to around 5 kt in the afternoon. Seas around 4 ft. Wave Detail: E 4 ft at 9 seconds and N 2 ft at 5 seconds. .WED NIGHT...W winds around 5 kt, becoming SW after midnight. Seas 3 to 4 ft. Wave Detail: E 3 ft at 9 seconds and SW 1 foot at 4 seconds. .THU...SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 3 to 4 ft. Wave Detail: E 3 ft at 9 seconds and SW 2 ft at 3 seconds. Patchy fog in the morning with vsby 1 NM or less. .THU NIGHT AND FRI...SW winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: SW 4 ft at 5 seconds and E 2 ft at 9 seconds. .FRI NIGHT...SW winds around 15 kt, becoming W after midnight. Gusts up to 25 kt. Seas 4 to 5 ft. Wave Detail: SW 4 ft at 7 seconds and NW 2 ft at 4 seconds. A chance of showers after midnight. .SAT...N winds 10 to 15 kt with gusts up to 20 kt. Seas around 4 ft. A chance of showers. .SAT NIGHT...NE winds 10 to 15 kt. Seas 3 to 4 ft. .SUN AND SUN NIGHT...E winds 10 to 15 kt with gusts up to 20 kt, becoming SW. Seas 3 to 5 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ282-301500- Ocean Waters from Marthas Vineyard to Nantucket from 25 to 60 NM- 1005 PM EDT Tue Sep 29 2026 .OVERNIGHT...NW winds around 5 kt. Seas 3 to 4 ft. Wave Detail: E 3 ft at 9 seconds and SW 2 ft at 6 seconds. .WED...N winds around 5 kt. Seas 3 to 4 ft. Wave Detail: E 3 ft at 9 seconds and S 2 ft at 7 seconds. .WED NIGHT...S winds around 5 kt, becoming SW after midnight. Seas around 3 ft. Wave Detail: E 3 ft at 9 seconds and SW 1 foot at 4 seconds. Patchy fog after midnight with vsby 1 NM or less. .THU...SW winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Seas around 3 ft. Wave Detail: E 3 ft at 9 seconds and SW 2 ft at 4 seconds. .THU NIGHT AND FRI...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. Wave Detail: SW 5 ft at 5 seconds and E 2 ft at 9 seconds. .FRI NIGHT...SW winds 15 to 20 kt. Seas 4 to 5 ft. Wave Detail: SW 5 ft at 7 seconds and NW 2 ft at 3 seconds. A chance of showers after midnight. .SAT...N winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. A chance of showers. .SAT NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. .SUN...E winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. A chance of showers. .SUN NIGHT...SW winds 10 to 15 kt. Seas 4 to 6 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. $$ ANZ283-301500- Ocean Waters from Montauk NY to Marthas Vineyard from 25 to 60 NM- 1005 PM EDT Tue Sep 29 2026 .OVERNIGHT...NW winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: E 3 ft at 9 seconds and SW 2 ft at 6 seconds. .WED...NW winds around 5 kt. Seas around 3 ft. Wave Detail: E 3 ft at 9 seconds and S 2 ft at 8 seconds. .WED NIGHT...W winds 5 to 10 kt. Seas around 3 ft. Wave Detail: E 3 ft at 9 seconds and W 1 foot at 3 seconds. .THU...SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 3 to 4 ft. Wave Detail: SW 3 ft at 5 seconds and E 3 ft at 9 seconds. .THU NIGHT...SW winds 15 to 20 kt. Seas 3 to 5 ft. Wave Detail: SW 5 ft at 6 seconds and E 2 ft at 9 seconds. .FRI...SW winds around 15 kt with gusts up to 20 kt. Seas 5 to 6 ft. Wave Detail: W 5 ft at 6 seconds and E 2 ft at 8 seconds. .FRI NIGHT...SW winds 15 to 20 kt, becoming W after midnight. Gusts up to 25 kt. Seas 4 to 5 ft. A chance of showers after midnight. .SAT...N winds around 15 kt with gusts up to 20 kt. Seas around 4 ft. A chance of showers. .SAT NIGHT...NE winds around 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. .SUN AND SUN NIGHT...E winds around 15 kt, becoming SW. Gusts up to 20 kt. Seas 4 to 5 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ 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