Coastal Waters Forecast
Issued by NWS Boston, MA
Issued by NWS Boston, MA
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277 FZUS51 KBOX 301405 CWFBOX Coastal Waters Forecast for Massachusetts and Rhode Island National Weather Service Boston/Norton MA 1005 AM EDT Wed Sep 30 2026 Coastal waters from the Merrimack River MA to Watch Hill RI out to 60 NM ANZ200-010300- 1005 AM EDT Wed Sep 30 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. $$ ANZ250-010300- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 1005 AM EDT Wed Sep 30 2026 .THIS AFTERNOON...NW winds around 5 kt, becoming S. Seas around 3 ft. Wave Detail: E 3 ft at 9 seconds and N 1 foot at 4 seconds. .TONIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at 9 seconds and W 1 foot at 2 seconds. .THU...SW winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: E 3 ft at 9 seconds and SW 2 ft at 3 seconds. .THU NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and E 2 ft at 9 seconds. .FRI...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and E 2 ft at 8 seconds. .FRI NIGHT...SW winds 10 to 15 kt, becoming NW after midnight. Gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and E 2 ft at 11 seconds. A chance of showers. .SAT THROUGH SUN...E winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. .SUN NIGHT...S winds 5 to 10 kt. Seas 2 to 4 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-010300- Massachusetts Bay and Ipswich Bay- 1005 AM EDT Wed Sep 30 2026 .THIS AFTERNOON...NW winds around 5 kt, becoming SE. Seas 2 to 3 ft. Wave Detail: E 3 ft at 9 seconds and N 1 foot at 5 seconds. .TONIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at 9 seconds and NE 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 2 ft at 9 seconds. .THU NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 3 seconds and E 2 ft at 9 seconds. .FRI...SW winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds and E 2 ft at 8 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: W 2 ft at 3 seconds and SE 2 ft at 4 seconds. A chance of showers. .SAT THROUGH SUN...E winds 10 to 15 kt. Seas around 2 ft. .SUN NIGHT...S winds 5 to 10 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. $$ ANZ231-010300- Cape Cod Bay- 1005 AM EDT Wed Sep 30 2026 .THIS AFTERNOON...NW winds around 5 kt, becoming SE. Seas around 2 ft. Wave Detail: N 1 foot at 5 seconds and S 1 foot at 7 seconds. .TONIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW 1 foot at 4 seconds and NE 1 foot at 4 seconds. .THU...SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: SW 1 foot at 2 seconds and NE 1 foot at 4 seconds. .THU NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 3 seconds and NE 1 foot at 4 seconds. .FRI...SW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 3 seconds and SE 1 foot at 3 seconds. .FRI NIGHT...SW winds 10 to 15 kt, becoming NW after midnight. Gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 3 seconds and SE 1 foot at 3 seconds. A chance of showers. .SAT THROUGH SUN...E winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. .SUN NIGHT...SE winds 5 to 10 kt. Seas around 2 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-010300- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 NM- 1005 AM EDT Wed Sep 30 2026 .THIS AFTERNOON...N winds around 5 kt, becoming W around 5 kt. Seas 3 to 4 ft. Wave Detail: E 3 ft at 9 seconds and N 1 foot at 5 seconds. .TONIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at 9 seconds and W 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 W 2 ft at 3 seconds. Patchy fog in the morning with vsby 1 NM or less. .THU NIGHT...SW winds around 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...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 8 seconds. .FRI NIGHT...SW winds 15 to 20 kt, becoming W 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 3 to 4 ft. Wave Detail: SW 4 ft at 5 seconds and E 2 ft at 11 seconds. A chance of showers. .SAT...N winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. A chance of showers. .SAT NIGHT AND SUN...NE winds 5 to 10 kt. Seas 2 to 3 ft. .SUN NIGHT...SE winds 5 to 10 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. $$ ANZ255-010300- Coastal Waters extending out to 25 NM South of Marthas Vineyard and Nantucket- 1005 AM EDT Wed Sep 30 2026 .THIS AFTERNOON...N winds around 5 kt, becoming S. Seas 2 to 3 ft. Wave Detail: E 3 ft at 9 seconds and S 2 ft at 7 seconds. .TONIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 2 ft at 9 seconds and SW 1 foot at 3 seconds. Patchy fog after midnight with vsby 1 NM or less. .THU...SW winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 6 seconds and SW 2 ft at 3 seconds. .THU NIGHT...SW winds 15 to 20 kt. Seas 3 to 4 ft. Wave Detail: SW 4 ft at 4 seconds and E 2 ft at 8 seconds. .FRI...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 4 ft. Wave Detail: SW 4 ft at 5 seconds and E 2 ft at 8 seconds. .FRI NIGHT...SW winds 15 to 20 kt, becoming W 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 4 to 5 ft. Wave Detail: SW 5 ft at 7 seconds and W 2 ft at 4 seconds. A chance of showers after midnight. .SAT...N winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. A chance of showers. .SAT NIGHT...NE winds 10 to 15 kt. Seas 2 to 3 ft. .SUN AND SUN NIGHT...E winds 10 to 15 kt, becoming SE 5 to 10 kt. Seas 2 to 4 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-010300- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 NM South of Block Island- 1005 AM EDT Wed Sep 30 2026 .THIS AFTERNOON...N winds around 5 kt, becoming SW around 5 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 10 seconds and SE 2 ft at 9 seconds. .TONIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 2 ft at 9 seconds and SW 1 foot at 2 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 4 seconds and E 2 ft at 9 seconds. .THU NIGHT...SW winds 15 to 20 kt. Seas 3 to 4 ft. Wave Detail: SW 4 ft at 4 seconds and E 2 ft at 9 seconds. .FRI...SW winds 15 to 20 kt. Seas 3 to 5 ft. Wave Detail: SW 5 ft at 5 seconds and E 1 foot at 8 seconds. .FRI NIGHT...SW winds 15 to 20 kt, becoming W 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 4 to 5 ft. Wave Detail: SW 5 ft at 7 seconds and W 3 ft at 4 seconds. A chance of showers after midnight. .SAT...NE 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. Seas 2 to 3 ft. .SUN AND SUN NIGHT...NE winds 10 to 15 kt. Seas around 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. $$ ANZ232-010300- Nantucket Sound- 1005 AM EDT Wed Sep 30 2026 .THIS AFTERNOON...N winds around 5 kt, becoming S. Seas around 2 ft. Wave Detail: S 1 foot at 5 seconds and N 1 foot at 5 seconds. .TONIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW 1 foot at 4 seconds and N 1 foot at 4 seconds. Patchy fog after midnight with vsby 1 NM or less. .THU...SW winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 4 seconds and NE 1 foot at 4 seconds. Patchy fog in the morning with vsby 1 to 3 NM. .THU NIGHT...SW winds around 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 4 seconds and NE 1 foot at 4 seconds. .FRI...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and E 1 foot at 2 seconds. .FRI NIGHT...SW winds 15 to 20 kt, becoming W 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 6 seconds and W 2 ft at 3 seconds. A chance of showers. .SAT...N winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of showers. .SAT NIGHT AND SUN...NE winds 5 to 10 kt, becoming E 10 to 15 kt. Seas around 2 ft. .SUN NIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-010300- Vineyard Sound- 1005 AM EDT Wed Sep 30 2026 .THIS AFTERNOON...Light and variable winds, becoming SW around 5 kt. Seas 1 foot or less. Wave Detail: N 1 foot at 4 seconds and SW 1 foot at 5 seconds. .TONIGHT...SW winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: SW 1 foot at 2 seconds and N 1 foot at 4 seconds. Patchy fog after midnight with vsby 1 to 3 NM. .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 3 ft at 4 seconds and NE 1 foot at 4 seconds. .THU NIGHT...SW winds around 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 9 seconds. .FRI...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: SW 4 ft at 4 seconds and E 1 foot at 2 seconds. .FRI NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt, becoming W 10 to 15 kt after midnight. Seas 2 to 4 ft. Wave Detail: SW 4 ft at 6 seconds and SW 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 AND SUN...E winds 5 to 10 kt. Seas around 2 ft. .SUN 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. $$ ANZ234-010300- Buzzards Bay- 1005 AM EDT Wed Sep 30 2026 .THIS AFTERNOON...Light and variable winds, becoming SW 5 to 10 kt. Seas 1 foot or less. Wave Detail: N 1 foot at 4 seconds and SW 1 foot at 5 seconds. .TONIGHT...SW winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: SW 1 foot at 3 seconds and N 1 foot at 4 seconds. Patchy fog after midnight with vsby 1 to 3 NM. .THU...SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 4 seconds and NE 1 foot at 4 seconds. .THU NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and NE 1 foot at 4 seconds. .FRI...SW winds 10 to 15 kt, increasing to 15 to 20 kt in the afternoon. Gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: SW 3 ft at 4 seconds and E 1 foot at 2 seconds. .FRI NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt, becoming W around 10 kt after midnight. Seas 2 to 4 ft. Wave Detail: SW 3 ft at 6 seconds and SW 2 ft at 3 seconds. A chance of showers. .SAT...N winds 10 to 15 kt. Seas around 2 ft. A chance of showers. .SAT NIGHT AND SUN...E winds 5 to 10 kt. Seas around 2 ft. .SUN NIGHT...E winds 5 to 10 kt. Seas 1 foot or less. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-010300- Rhode Island Sound- 1005 AM EDT Wed Sep 30 2026 .THIS AFTERNOON...N winds around 5 kt, becoming S around 5 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 9 seconds and NW 1 foot at 2 seconds. .TONIGHT...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. Patchy fog after midnight with vsby 1 to 3 NM. .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 4 seconds and NE 1 foot at 4 seconds. .THU NIGHT...SW winds around 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 9 seconds. .FRI...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: SW 4 ft at 6 seconds and W 2 ft at 3 seconds. .FRI NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt, becoming W 10 to 15 kt after midnight. Seas 3 to 4 ft. Wave Detail: SW 4 ft at 7 seconds and SW 2 ft at 3 seconds. A chance of showers. .SAT...NE winds 10 to 15 kt. Seas 2 to 4 ft. A chance of showers. .SAT NIGHT AND SUN...NE winds 5 to 10 kt, becoming E 10 to 15 kt. Seas around 2 ft. .SUN NIGHT...NE 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. $$ ANZ237-010300- Block Island Sound- 1005 AM EDT Wed Sep 30 2026 .THIS AFTERNOON...NW winds around 5 kt, becoming SW around 5 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 9 seconds and NE 1 foot at 5 seconds. .TONIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 9 seconds and SW 1 foot at 2 seconds. .THU...SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: S 2 ft at 7 seconds and SW 1 foot at 2 seconds. .THU NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 4 seconds and E 1 foot at 9 seconds. .FRI...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: SE 3 ft at 7 seconds and E 1 foot at 3 seconds. .FRI NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, becoming NW after midnight. Seas 2 to 4 ft. Wave Detail: S 3 ft at 7 seconds and W 1 foot at 4 seconds. A chance of showers. .SAT...NE winds 10 to 15 kt. Seas 2 to 3 ft. A chance of showers. .SAT NIGHT AND SUN...NE winds 5 to 10 kt, becoming E 10 to 15 kt. Seas 2 to 3 ft. .SUN NIGHT...NE winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-010300- Boston Harbor- 1005 AM EDT Wed Sep 30 2026 .THIS AFTERNOON...W winds around 5 kt, becoming SE. Waves 1 foot or less. .TONIGHT...S winds 5 to 10 kt. Waves 1 foot or less. .THU...SW winds around 5 kt, increasing to around 10 kt in the afternoon. Waves 1 foot or less. .THU NIGHT...SW winds around 10 kt. Waves around 2 ft. .FRI...SW winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Waves 1 foot or less, then around 2 ft in the afternoon. .FRI NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, becoming NW after midnight. Waves around 2 ft. A chance of showers. .SAT THROUGH SUN...E winds 5 to 10 kt. Waves 1 foot or less. .SUN NIGHT...S 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. $$ ANZ236-010300- Narragansett Bay- 1005 AM EDT Wed Sep 30 2026 .THIS AFTERNOON...W winds around 5 kt, becoming S around 5 kt. Waves 1 foot or less. .TONIGHT...SW winds around 5 kt. Waves 1 foot or less. .THU...SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Waves 2 to 3 ft. .THU NIGHT...SW winds 10 to 15 kt. Waves around 2 ft. .FRI...SW winds 10 to 15 kt with gusts up to 25 kt. Waves 2 to 3 ft. .FRI NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, becoming NW after midnight. Waves 2 to 3 ft. A chance of showers. .SAT THROUGH SUN...E winds 5 to 10 kt. Waves around 2 ft. .SUN NIGHT...S winds 5 to 10 kt. Waves around 2 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ280-010300- Ocean Waters from the Merrimack River to Plymouth from 40 to 60 NM- 1005 AM EDT Wed Sep 30 2026 .THIS AFTERNOON...N winds around 5 kt, becoming W. Seas 3 to 4 ft. Wave Detail: E 3 ft at 9 seconds and N 2 ft at 5 seconds. .TONIGHT...SW winds 5 to 10 kt. Seas around 3 ft. Wave Detail: E 3 ft at 9 seconds and S 2 ft at 7 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. Patchy fog. Vsby 1 NM or less, increasing to 1 to 3 NM in the afternoon. .THU NIGHT...SW winds around 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...SW winds 15 to 20 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 8 seconds. .FRI NIGHT...SW winds 15 to 20 kt, becoming NW 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 3 to 4 ft. Wave Detail: SW 4 ft at 5 seconds and E 2 ft at 11 seconds. A chance of showers. .SAT AND SAT NIGHT...N winds 10 to 15 kt. Gusts up to 20 kt. Seas 2 to 4 ft. .SUN...E winds 10 to 15 kt. Seas 3 to 5 ft. .SUN NIGHT...S 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. $$ ANZ281-010300- Ocean Waters from Provincetown to Nantucket from 20 to 60 NM- 1005 AM EDT Wed Sep 30 2026 .THIS AFTERNOON...NW winds around 5 kt. Seas 3 to 4 ft. Wave Detail: E 3 ft at 9 seconds and N 2 ft at 5 seconds. .TONIGHT...SW winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: E 3 ft at 9 seconds and W 1 foot at 4 seconds. Patchy fog after midnight with vsby 1 NM or less. .THU...SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 3 to 4 ft. Wave Detail: SW 3 ft at 5 seconds and E 3 ft at 9 seconds. Patchy fog in the morning with vsby 1 NM or less. .THU NIGHT...SW winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to 4 ft. Wave Detail: SW 3 ft at 4 seconds and E 2 ft at 8 seconds. .FRI...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 5 ft. Wave Detail: W 4 ft at 5 seconds and E 2 ft at 8 seconds. .FRI NIGHT...SW winds 15 to 20 kt, becoming W 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 4 to 5 ft. Wave Detail: W 5 ft at 5 seconds and E 2 ft at 8 seconds. A chance of showers. .SAT...N winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 5 ft. A chance of showers. .SAT NIGHT AND SUN...NE winds 10 to 15 kt. Seas 3 to 5 ft. .SUN NIGHT...SE winds 5 to 10 kt. Seas 4 to 6 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ282-010300- Ocean Waters from Marthas Vineyard to Nantucket from 25 to 60 NM- 1005 AM EDT Wed Sep 30 2026 .THIS AFTERNOON...N winds around 5 kt. Seas 3 to 4 ft. Wave Detail: E 3 ft at 9 seconds and SW 2 ft at 6 seconds. .TONIGHT...SW winds around 5 kt. Seas around 3 ft. Wave Detail: E 3 ft at 9 seconds and SW 1 foot at 4 seconds. Patchy fog. Vsby 1 NM or less after midnight. .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...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. Wave Detail: SW 4 ft at 5 seconds and E 2 ft at 9 seconds. .FRI...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 4 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 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 5 to 6 ft. Wave Detail: SW 6 ft at 7 seconds and W 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 3 to 5 ft. A chance of showers. .SAT NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. .SUN AND SUN NIGHT...E winds 10 to 15 kt, becoming SE 5 to 10 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. $$ ANZ283-010300- Ocean Waters from Montauk NY to Marthas Vineyard from 25 to 60 NM- 1005 AM EDT Wed Sep 30 2026 .THIS AFTERNOON...N winds around 5 kt, becoming W around 5 kt. Seas around 3 ft. Wave Detail: E 3 ft at 9 seconds and S 2 ft at 8 seconds. .TONIGHT...SW winds 5 to 10 kt. Seas around 3 ft. Wave Detail: E 3 ft at 9 seconds and SW 1 foot at 3 seconds. .THU...SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 3 to 4 ft. Wave Detail: SW 3 ft at 5 seconds and E 3 ft at 9 seconds. .THU NIGHT...SW winds 15 to 20 kt. Seas 3 to 4 ft. Wave Detail: SW 4 ft at 5 seconds and E 2 ft at 9 seconds. .FRI...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 6 ft. Wave Detail: SW 6 ft at 6 seconds and E 2 ft at 8 seconds. .FRI NIGHT...SW winds 15 to 20 kt, becoming W after midnight. Gusts up to 25 kt. Seas 5 to 6 ft. Wave Detail: SW 6 ft at 7 seconds and W 4 ft at 4 seconds. A chance of showers after midnight. .SAT...N winds around 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. A chance of showers. .SAT NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. .SUN AND SUN NIGHT...E winds 10 to 15 kt with gusts up to 20 kt, becoming S. Seas 3 to 4 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ 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