Coastal Waters Forecast
Issued by NWS Boston, MA
Issued by NWS Boston, MA
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382 FZUS51 KBOX 151705 CWFBOX Coastal Waters Forecast for Massachusetts and Rhode Island National Weather Service Boston/Norton MA 104 PM EDT Tue Sep 15 2026 Coastal waters from the Merrimack River MA to Watch Hill RI out to 60 NM ANZ200-160600- 104 PM EDT Tue Sep 15 2026 .Synopsis for Massachusetts and Rhode Island coastal waters... High pres overhead today bringing dry conditions and light winds. High then shifts southeast of the waters by Wed-Thu ahead of an approaching cold front. Cold front will cross the waters Thu night into early Fri followed by high pres building across the waters Sat. $$ ANZ250-160600- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 104 PM EDT Tue Sep 15 2026 .THIS AFTERNOON...NE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: NE 2 ft at 6 seconds and NW 1 foot at 5 seconds. .TONIGHT...SE winds around 5 kt, becoming SW after midnight. Seas around 2 ft. Wave Detail: N 2 ft at 5 seconds and S 1 foot at 6 seconds. .WED...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 2 ft at 5 seconds and W 1 foot at 3 seconds. .WED NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 2 ft at 8 seconds and NE 2 ft at 12 seconds. .THU...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 2 ft at 4 seconds and E 2 ft at 7 seconds. .THU NIGHT...SW winds 5 to 10 kt. Gusts up to 20 kt after midnight. Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds and E 2 ft at 7 seconds. A chance of showers after midnight. .FRI...NW winds 5 to 10 kt with gusts up to 20 kt. Seas around 2 ft. A chance of showers. .FRI NIGHT AND SAT...N winds 10 to 15 kt, becoming NE. Gusts up to 25 kt. Seas 2 to 3 ft. .SAT NIGHT...S winds 10 to 15 kt. Seas 2 to 3 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-160600- Massachusetts Bay and Ipswich Bay- 104 PM EDT Tue Sep 15 2026 .THIS AFTERNOON...E winds 5 to 10 kt. Seas around 2 ft. Wave Detail: N 2 ft at 5 seconds and S 1 foot at 7 seconds. .TONIGHT...SE winds 5 to 10 kt, becoming SW after midnight. Seas around 2 ft. Wave Detail: N 2 ft at 5 seconds and S 1 foot at 8 seconds. .WED...S winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: SW 1 foot at 3 seconds and E 1 foot at 6 seconds. .WED NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 2 ft at 7 seconds and S 1 foot at 2 seconds. .THU...NW winds around 5 kt, becoming SE in the afternoon. Seas around 2 ft. Wave Detail: E 2 ft at 7 seconds and W 1 foot at 2 seconds. .THU NIGHT...S winds 5 to 10 kt, becoming SW after midnight. Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds and NE 1 foot at 4 seconds. A chance of showers. .FRI...NW winds 5 to 10 kt. Seas around 2 ft. A chance of showers. .FRI NIGHT AND SAT...N winds 10 to 15 kt, becoming NE. Gusts up to 20 kt. Seas 2 to 3 ft. .SAT NIGHT...S winds 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. $$ ANZ231-160600- Cape Cod Bay- 104 PM EDT Tue Sep 15 2026 .THIS AFTERNOON...NE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: NE 2 ft at 4 seconds and N 2 ft at 5 seconds. .TONIGHT...SE winds around 5 kt, becoming S after midnight. Seas around 2 ft. Wave Detail: N 2 ft at 5 seconds and S 1 foot at 7 seconds. .WED...SW winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft in the afternoon. Wave Detail: SW 1 foot at 3 seconds and N 1 foot at 5 seconds, becoming SW 1 foot at 2 seconds and N 1 foot at 4 seconds. .WED NIGHT...SW winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: SW 1 foot at 3 seconds and NE 1 foot at 5 seconds. .THU...SW winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft in the afternoon. Wave Detail: SW 1 foot at 2 seconds and E 1 foot at 4 seconds, becoming SW 1 foot at 2 seconds and W 1 foot at 3 seconds. .THU NIGHT...SW winds 5 to 10 kt. Gusts up to 20 kt after midnight. Seas around 2 ft. Wave Detail: W 2 ft at 3 seconds and SW 1 foot at 2 seconds. A chance of showers after midnight. .FRI...NW winds 5 to 10 kt with gusts up to 20 kt. Seas around 2 ft. A chance of showers. .FRI NIGHT THROUGH SAT NIGHT...SE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-160600- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 NM- 104 PM EDT Tue Sep 15 2026 .THIS AFTERNOON...NE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: N 3 ft at 6 seconds and S 1 foot at 6 seconds. .TONIGHT...E winds 5 to 10 kt, becoming S after midnight. Seas 2 to 3 ft. Wave Detail: N 3 ft at 6 seconds and S 1 foot at 6 seconds. .WED...SW winds around 5 kt, becoming S in the afternoon. Seas around 2 ft. Wave Detail: NE 2 ft at 5 seconds and SE 2 ft at 9 seconds. .WED NIGHT...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: E 2 ft at 7 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 2 ft at 4 seconds and E 2 ft at 7 seconds. A chance of showers after midnight. .FRI...NW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of showers. .FRI NIGHT THROUGH SAT NIGHT...SE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ255-160600- Coastal Waters extending out to 25 NM South of Marthas Vineyard and Nantucket- 104 PM EDT Tue Sep 15 2026 .THIS AFTERNOON...NE winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: NE 2 ft at 5 seconds and NW 1 foot at 4 seconds. .TONIGHT...E winds 5 to 10 kt, becoming SE after midnight. Seas around 2 ft. Wave Detail: E 2 ft at 5 seconds and NW 1 foot at 3 seconds. .WED...SW winds around 5 kt, increasing to 5 to 10 kt in the afternoon. Seas around 2 ft. Wave Detail: NE 2 ft at 5 seconds and SE 1 foot at 9 seconds. .WED NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 2 ft at 7 seconds and SW 1 foot at 3 seconds. .THU...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 2 ft at 7 seconds and W 1 foot at 3 seconds. .THU NIGHT...SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt after midnight. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and E 2 ft at 7 seconds. A chance of showers after midnight. .FRI...NW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of showers. .FRI NIGHT THROUGH SAT NIGHT...SE winds 15 to 20 kt. Seas 2 to 4 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-160600- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 NM South of Block Island- 104 PM EDT Tue Sep 15 2026 .THIS AFTERNOON...NE 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. .TONIGHT...E winds 5 to 10 kt, becoming S after midnight. Seas around 2 ft. Wave Detail: NE 2 ft at 4 seconds and S 1 foot at 6 seconds. .WED...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 8 seconds and E 1 foot at 5 seconds. .WED NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 2 ft at 7 seconds and W 1 foot at 3 seconds. .THU AND 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 5 seconds and E 2 ft at 7 seconds. .FRI THROUGH SAT NIGHT...SE winds 15 to 20 kt. Seas 2 to 4 ft. Wave Detail: NE 4 ft at 4 seconds and W 3 ft at 5 seconds. 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. $$ ANZ232-160600- Nantucket Sound- 104 PM EDT Tue Sep 15 2026 .THIS AFTERNOON...NE winds around 10 kt. Seas around 2 ft. Wave Detail: NE 2 ft at 3 seconds and NW 1 foot at 4 seconds. .TONIGHT...E winds 5 to 10 kt, becoming S after midnight. Seas around 2 ft. Wave Detail: NE 1 foot at 4 seconds and S 1 foot at 6 seconds. .WED...SW winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft in the afternoon. Wave Detail: S 1 foot at 4 seconds and NE 1 foot at 5 seconds, becoming SW 1 foot at 2 seconds and N 1 foot at 5 seconds. .WED NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: W 1 foot at 3 seconds and SW 1 foot at 3 seconds. .THU...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: W 1 foot at 3 seconds and SW 1 foot at 3 seconds. .THU NIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt after midnight. Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds and W 2 ft at 3 seconds. A chance of showers after midnight. .FRI...NW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. A chance of showers. .FRI NIGHT THROUGH SAT NIGHT...SE winds 15 to 20 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-160600- Vineyard Sound- 104 PM EDT Tue Sep 15 2026 .THIS AFTERNOON...NE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: N 1 foot at 4 seconds and S 1 foot at 6 seconds. .TONIGHT...E winds 5 to 10 kt, becoming S after midnight. Seas 1 foot or less. Wave Detail: NW 1 foot at 2 seconds and E 1 foot at 3 seconds. .WED...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 5 seconds and SE 1 foot at 9 seconds, becoming SW 1 foot at 3 seconds and NW 1 foot at 4 seconds. .WED NIGHT...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, becoming W 1 foot at 3 seconds and SW 1 foot at 3 seconds. .THU...SW winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft in the afternoon. Wave Detail: W 1 foot at 2 seconds and SW 1 foot at 3 seconds, becoming SW 1 foot at 3 seconds and E 1 foot at 7 seconds. .THU NIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt after midnight. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and E 1 foot at 7 seconds. A chance of showers after midnight. .FRI...NW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. A chance of showers. .FRI NIGHT THROUGH SAT NIGHT...SE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ234-160600- Buzzards Bay- 104 PM EDT Tue Sep 15 2026 .THIS AFTERNOON...NE winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: NE 1 foot at 2 seconds and NW 1 foot at 6 seconds. .TONIGHT...E winds around 5 kt, becoming S around 5 kt after midnight. Seas 1 foot or less. Wave Detail: NE 1 foot at 3 seconds and S 1 foot at 7 seconds. .WED...SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 1 foot or less, then around 2 ft in the afternoon. Wave Detail: NE 1 foot at 5 seconds and SE 1 foot at 9 seconds, becoming SW 1 foot at 3 seconds and NW 1 foot at 4 seconds. .WED NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Seas around 2 ft in the evening, then 1 foot or less. Wave Detail: W 1 foot at 3 seconds and E 1 foot at 5 seconds, becoming W 1 foot at 2 seconds and SW 1 foot at 3 seconds. .THU...SW winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Seas 1 foot or less, then around 2 ft in the afternoon. Wave Detail: SW 1 foot at 3 seconds and SE 1 foot at 7 seconds, becoming SW 1 foot at 3 seconds and E 1 foot at 7 seconds. .THU NIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt after midnight. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and SE 1 foot at 7 seconds. A chance of showers after midnight. .FRI...NW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. A chance of showers. .FRI NIGHT THROUGH SAT NIGHT...SE winds 10 to 15 kt. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-160600- Rhode Island Sound- 104 PM EDT Tue Sep 15 2026 .THIS AFTERNOON...NE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: NE 2 ft at 3 seconds and NW 1 foot at 3 seconds. .TONIGHT...SE winds 5 to 10 kt, becoming S after midnight. Seas around 2 ft in the evening, then 1 foot or less. Wave Detail: E 1 foot at 3 seconds and N 1 foot at 3 seconds. .WED...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: N 1 foot at 2 seconds and SE 1 foot at 5 seconds, becoming SW 1 foot at 3 seconds and NW 1 foot at 4 seconds. .WED NIGHT...SW winds 10 to 15 kt, diminishing to 5 to 10 kt after midnight. Seas around 2 ft. Wave Detail: SW 2 ft 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 2 seconds and SW 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 1 foot at 7 seconds. A chance of showers after midnight. .FRI...NW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of showers. .FRI NIGHT THROUGH SAT NIGHT...SE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ237-160600- Block Island Sound- 104 PM EDT Tue Sep 15 2026 .THIS AFTERNOON...E winds around 5 kt. Seas around 2 ft. Wave Detail: E 2 ft at 4 seconds and NW 1 foot at 2 seconds. .TONIGHT...SE winds around 5 kt, becoming S around 5 kt after midnight. Seas around 2 ft in the evening, then 1 foot or less. Wave Detail: N 1 foot at 3 seconds and E 1 foot at 4 seconds, becoming N 1 foot at 3 seconds and SE 1 foot at 5 seconds. .WED...SW winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Seas 1 foot or less, then around 2 ft in the afternoon. Wave Detail: E 1 foot at 4 seconds and SE 1 foot at 9 seconds, becoming W 1 foot at 3 seconds and E 1 foot at 5 seconds. .WED NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: W 1 foot at 3 seconds and SW 1 foot at 3 seconds. .THU...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: W 1 foot at 2 seconds and SW 1 foot at 3 seconds. .THU NIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt after midnight. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and SE 1 foot at 8 seconds. A chance of showers after midnight. .FRI...NW winds 10 to 15 kt. Seas around 2 ft. A chance of showers. .FRI NIGHT THROUGH SAT NIGHT...SE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-160600- Boston Harbor- 104 PM EDT Tue Sep 15 2026 .THIS AFTERNOON...E winds 5 to 10 kt. Waves 1 foot or less. .TONIGHT...SE winds 5 to 10 kt, becoming SW after midnight. Waves 1 foot or less. .WED...SW winds 5 to 10 kt. Waves 1 foot or less. .WED NIGHT...SW winds 5 to 10 kt. Waves 1 foot or less. .THU...NW winds around 5 kt, becoming SE 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...NW winds around 10 kt. Waves around 2 ft. A chance of showers. .FRI NIGHT AND SAT...N winds 10 to 15 kt, becoming NE 5 to 10 kt. Waves 1 foot or less. .SAT 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. $$ ANZ236-160600- Narragansett Bay- 104 PM EDT Tue Sep 15 2026 .THIS AFTERNOON...E winds around 5 kt. Waves around 2 ft. .TONIGHT...SE winds around 5 kt, becoming SW after midnight. Waves 1 foot or less. .WED...SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Waves 1 foot or less, then around 2 ft in the afternoon. .WED NIGHT...SW winds 5 to 10 kt. Waves 1 foot or less. .THU...SW winds around 5 kt, becoming S in the afternoon. Waves 1 foot or less, then around 2 ft in the afternoon. .THU NIGHT...SW winds around 10 kt. Waves around 2 ft. A chance of showers after midnight. .FRI...NW winds 5 to 10 kt. Waves around 2 ft. A chance of showers. .FRI NIGHT THROUGH SAT NIGHT...SE winds 5 to 10 kt. Waves around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ280-160600- Ocean Waters from the Merrimack River to Plymouth from 40 to 60 NM- 104 PM EDT Tue Sep 15 2026 .THIS AFTERNOON...NE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: N 3 ft at 6 seconds and S 1 foot at 7 seconds. .TONIGHT...SE winds around 5 kt, becoming SW after midnight. Seas 2 to 3 ft. Wave Detail: N 2 ft at 5 seconds and S 1 foot at 6 seconds. .WED...SW winds 5 to 10 kt, becoming S 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas around 2 ft. Wave Detail: W 2 ft at 4 seconds and E 2 ft at 6 seconds. .WED NIGHT...SW winds 10 to 15 kt, diminishing to 5 to 10 kt after midnight. Seas around 2 ft. Wave Detail: SW 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: NE 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 3 ft. Wave Detail: SW 3 ft at 4 seconds and E 2 ft at 7 seconds. A chance of showers after midnight. .FRI...NW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of showers. .FRI NIGHT THROUGH SAT NIGHT...S winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ281-160600- Ocean Waters from Provincetown to Nantucket from 20 to 60 NM- 104 PM EDT Tue Sep 15 2026 .THIS AFTERNOON...NE winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: N 4 ft at 6 seconds and S 1 foot at 6 seconds. .TONIGHT...E winds 5 to 10 kt, becoming SE after midnight. Seas 2 to 3 ft. Wave Detail: N 3 ft at 6 seconds and S 1 foot at 6 seconds. .WED...S winds around 5 kt, becoming SW in the afternoon. Seas 2 to 3 ft. Wave Detail: N 3 ft at 5 seconds and E 2 ft at 9 seconds. .WED NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 2 ft at 7 seconds and SW 1 foot at 3 seconds. .THU...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 2 ft at 7 seconds and W 1 foot at 3 seconds. .THU NIGHT...SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt after midnight. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 4 seconds and E 2 ft at 7 seconds. A chance of showers after midnight. .FRI...NW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of showers. .FRI NIGHT AND SAT...N winds 15 to 20 kt, becoming NE 10 to 15 kt. Gusts up to 25 kt. Seas 2 to 3 ft. .SAT NIGHT...SE winds 5 to 10 kt. Seas 3 to 5 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ282-160600- Ocean Waters from Marthas Vineyard to Nantucket from 25 to 60 NM- 104 PM EDT Tue Sep 15 2026 .THIS AFTERNOON...NE winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: N 3 ft at 5 seconds and S 1 foot at 6 seconds. .TONIGHT...NE winds 5 to 10 kt, diminishing to around 5 kt after midnight. Seas 2 to 3 ft. Wave Detail: N 3 ft at 5 seconds and S 1 foot at 6 seconds. .WED...NE winds around 5 kt, becoming S in the afternoon. Seas 2 to 3 ft. Wave Detail: N 3 ft at 5 seconds and SE 1 foot at 9 seconds. .WED NIGHT...SW winds around 5 kt. Seas 2 to 3 ft. Wave Detail: E 2 ft at 7 seconds and W 1 foot at 3 seconds. .THU AND THU NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and E 2 ft at 7 seconds. .FRI...NW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: W 3 ft at 5 seconds and NW 3 ft at 6 seconds. A chance of showers. .FRI NIGHT AND SAT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. .SAT NIGHT...E winds around 10 kt. Seas 3 to 5 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ283-160600- Ocean Waters from Montauk NY to Marthas Vineyard from 25 to 60 NM- 104 PM EDT Tue Sep 15 2026 .THIS AFTERNOON...NE winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: N 3 ft at 5 seconds and S 1 foot at 6 seconds. .TONIGHT...E winds 5 to 10 kt, diminishing to around 5 kt after midnight. Seas 2 to 3 ft. Wave Detail: N 2 ft at 5 seconds and S 1 foot at 6 seconds. .WED...NE winds around 5 kt, becoming SW in the afternoon. Seas around 2 ft. Wave Detail: E 2 ft at 6 seconds and SE 2 ft at 9 seconds. .WED NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 2 ft at 7 seconds and W 1 foot at 3 seconds. .THU AND THU NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: W 3 ft at 4 seconds and E 2 ft at 7 seconds. .FRI THROUGH SAT...E winds 15 to 20 kt. Seas 2 to 3 ft. Wave Detail: NE 3 ft at 4 seconds and W 3 ft at 5 seconds. .SAT NIGHT...SE winds 10 to 15 kt. Seas 3 to 5 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ For the latest updates...please visit our webpage at www.weather.gov/boston You can follow us on Facebook at www.facebook.com/us.nationalweatherservice.boston.gov You can follow us on Twitter at @NWSBoston