Coastal Waters Forecast
Issued by NWS Boston, MA

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806 FZUS51 KBOX 091405 CWFBOX Coastal Waters Forecast for Massachusetts and Rhode Island National Weather Service Boston/Norton MA 1004 AM EDT Thu May 9 2024 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ200-100300- 1004 AM EDT Thu May 9 2024 .Synopsis for Massachusetts and Rhode Island coastal waters... Low pressure system passes well offshore to the southeast. This could bring some light rain to the southern waters late today into tonight. Light rain showers linger into Friday with drying conditions into the weekend and early next week. $$ ANZ250-100300- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 1005 AM EDT Thu May 9 2024 .THIS AFTERNOON...N winds 10 to 15 kt, becoming NE 5 to 10 kt. Gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: N 2 ft at 4 seconds and SE 2 ft at 6 seconds. .TONIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. Wave Detail: NE 4 ft at 6 seconds and SE 2 ft at 6 seconds. .FRI...NE winds 10 to 15 kt. Gusts up to 20 kt in the morning. Seas 3 to 4 ft. Wave Detail: NE 4 ft at 7 seconds and SE 1 foot at 6 seconds. .FRI NIGHT...NE winds 5 to 10 kt, increasing to 10 to 15 kt after midnight. Seas 3 to 5 ft. Wave Detail: E 3 ft at 7 seconds and E 1 foot at 10 seconds. .SAT AND SAT NIGHT...NE winds 10 to 15 kt. Seas 3 to 5 ft. Wave Detail: E 5 ft at 8 seconds and SE 1 foot at 8 seconds. .SUN THROUGH MON NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: E 4 ft at 8 seconds and S 3 ft at 4 seconds. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-100300- Massachusetts Bay and Ipswich Bay- 1005 AM EDT Thu May 9 2024 .THIS AFTERNOON...N winds 5 to 10 kt, becoming NE. Seas 2 to 3 ft. Wave Detail: N 1 foot at 4 seconds and SE 1 foot at 6 seconds. .TONIGHT...NE winds 10 to 15 kt. Gusts up to 20 kt after midnight. Seas 2 to 3 ft. Wave Detail: E 3 ft at 6 seconds and E 1 foot at 10 seconds. .FRI...NE winds 10 to 15 kt. Gusts up to 20 kt in the morning. Seas 2 to 3 ft. Wave Detail: E 3 ft at 6 seconds and E 1 foot at 11 seconds. .FRI NIGHT...NE winds 10 to 15 kt. Seas 2 to 4 ft. Wave Detail: E 3 ft at 7 seconds and E 1 foot at 10 seconds. .SAT AND SAT NIGHT...NE winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at 8 seconds and SE 1 foot at 15 seconds. .SUN THROUGH MON NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at 8 seconds and SW 2 ft at 3 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. $$ ANZ231-100300- Cape Cod Bay- 1005 AM EDT Thu May 9 2024 .THIS AFTERNOON...N winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: N 1 foot at 4 seconds and SE 1 foot at 6 seconds. .TONIGHT...NE winds 10 to 15 kt. Gusts up to 20 kt after midnight. Seas 2 to 3 ft. Wave Detail: N 2 ft at 3 seconds and S 1 foot at 6 seconds. .FRI...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: N 2 ft at 4 seconds and S 1 foot at 6 seconds. .FRI NIGHT...NE winds around 10 kt. Seas 2 to 3 ft. Wave Detail: N 2 ft at 4 seconds and S 1 foot at 7 seconds. .SAT AND SAT NIGHT...NE winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at 8 seconds and N 2 ft at 3 seconds. .SUN THROUGH MON NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 7 seconds and NE 1 foot at 3 seconds. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-100300- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 1005 AM EDT Thu May 9 2024 .THIS AFTERNOON...N winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. Wave Detail: S 3 ft at 6 seconds and N 2 ft at 4 seconds. .TONIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. Wave Detail: N 3 ft at 5 seconds and S 3 ft at 6 seconds. Patchy fog after midnight. .FRI...NE winds around 15 kt with gusts up to 20 kt. Seas 4 to 5 ft. Wave Detail: NE 4 ft at 7 seconds and S 2 ft at 7 seconds. A chance of showers in the morning. .FRI NIGHT...NE winds 10 to 15 kt. Seas 4 to 5 ft. Wave Detail: NE 4 ft at 7 seconds and S 1 foot at 7 seconds. .SAT AND SAT NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 5 ft. Wave Detail: NE 5 ft at 8 seconds and S 2 ft at 8 seconds. .SUN THROUGH MON NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. Wave Detail: E 5 ft at 8 seconds and SW 2 ft at 3 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. $$ ANZ255-100300- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- 1005 AM EDT Thu May 9 2024 .THIS AFTERNOON...NW winds around 10 kt, becoming NE. Gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: S 3 ft at 6 seconds and N 1 foot at 3 seconds. .TONIGHT...NE winds 10 to 15 kt, increasing to 15 to 20 kt after midnight. Gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: N 3 ft at 4 seconds and S 3 ft at 6 seconds. A chance of showers. .FRI...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 4 ft. Wave Detail: NE 4 ft at 4 seconds and S 2 ft at 7 seconds. A chance of showers. .FRI NIGHT...NE winds 15 to 20 kt. Seas 3 to 5 ft. Wave Detail: NE 4 ft at 5 seconds and S 2 ft at 8 seconds. A chance of showers. .SAT AND SAT NIGHT...NE winds 15 to 20 kt. Seas 3 to 5 ft. Wave Detail: NE 4 ft at 5 seconds and E 4 ft at 8 seconds. .SUN THROUGH MON NIGHT...SW winds 10 to 15 kt. Seas 2 to 4 ft. Wave Detail: E 4 ft at 8 seconds and SW 3 ft at 4 seconds. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-100300- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 1005 AM EDT Thu May 9 2024 .THIS AFTERNOON...NW winds 5 to 10 kt, becoming NE. Seas 2 to 3 ft. Wave Detail: S 3 ft at 6 seconds and E 1 foot at 10 seconds. A slight chance of showers. .TONIGHT...E winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to 4 ft. Wave Detail: E 3 ft at 4 seconds and S 3 ft at 6 seconds. A chance of showers. .FRI...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: NE 4 ft at 5 seconds and S 2 ft at 7 seconds. A chance of showers. .FRI NIGHT...NE winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Seas 4 to 5 ft. Wave Detail: NE 4 ft at 5 seconds and S 2 ft at 8 seconds. A chance of showers. .SAT AND SAT NIGHT...NE winds 15 to 20 kt. Seas 3 to 5 ft. Wave Detail: E 4 ft at 8 seconds and NE 3 ft at 5 seconds. .SUN THROUGH MON NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. Wave Detail: E 4 ft at 8 seconds and SW 3 ft at 4 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. $$ ANZ232-100300- Nantucket Sound- 1005 AM EDT Thu May 9 2024 .THIS AFTERNOON...N winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: N 2 ft at 4 seconds and S 1 foot at 6 seconds. .TONIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: NE 2 ft at 3 seconds and SW 1 foot at 6 seconds. .FRI...NE winds 15 to 20 kt. Seas 2 to 3 ft. Wave Detail: NE 3 ft at 4 seconds and S 1 foot at 7 seconds. A chance of showers in the morning. .FRI NIGHT...NE winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 2 to 3 ft. Wave Detail: NE 2 ft at 4 seconds and S 1 foot at 7 seconds. A chance of showers after midnight. .SAT AND SAT NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: NE 2 ft at 4 seconds and E 2 ft at 8 seconds. .SUN THROUGH MON NIGHT...SW winds 10 to 15 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds and E 2 ft at 8 seconds. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-100300- Vineyard Sound- 1005 AM EDT Thu May 9 2024 .THIS AFTERNOON...NW winds around 10 kt, becoming NE. Seas around 2 ft. Wave Detail: S 2 ft at 6 seconds and N 1 foot at 3 seconds. .TONIGHT...NE winds 10 to 15 kt. Gusts up to 20 kt after midnight. Seas around 2 ft. Wave Detail: SW 2 ft at 6 seconds and NE 1 foot at 3 seconds. .FRI...NE winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: NE 2 ft at 3 seconds and S 1 foot at 7 seconds. A chance of showers in the morning. .FRI NIGHT...NE winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 2 to 3 ft. Wave Detail: NE 2 ft at 3 seconds and S 1 foot at 7 seconds. A chance of showers after midnight. .SAT AND SAT NIGHT...NE winds 15 to 20 kt. Seas around 2 ft. Wave Detail: NE 2 ft at 3 seconds and E 2 ft at 8 seconds. .SUN THROUGH MON NIGHT...SW winds 10 to 15 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and E 2 ft at 8 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. $$ ANZ234-100300- Buzzards Bay- 1005 AM EDT Thu May 9 2024 .THIS AFTERNOON...N winds around 10 kt, becoming NE. Seas around 2 ft. Wave Detail: S 2 ft at 6 seconds and NW 1 foot at 4 seconds. .TONIGHT...NE winds 10 to 15 kt. Gusts up to 20 kt after midnight. Seas around 2 ft. Wave Detail: SW 2 ft at 6 seconds and NE 1 foot at 2 seconds. .FRI...NE winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: NE 2 ft at 3 seconds and S 1 foot at 7 seconds. A chance of showers in the morning. .FRI NIGHT...NE winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 2 to 3 ft. Wave Detail: NE 2 ft at 3 seconds and S 1 foot at 7 seconds. A chance of showers after midnight. .SAT AND SAT NIGHT...N winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: NE 2 ft at 3 seconds and E 2 ft at 8 seconds. .SUN THROUGH MON NIGHT...SW winds 10 to 15 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds and E 2 ft at 8 seconds. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-100300- Rhode Island Sound- 1005 AM EDT Thu May 9 2024 .THIS AFTERNOON...N winds 5 to 10 kt, becoming NE. Seas 2 to 3 ft. Wave Detail: S 3 ft at 6 seconds and N 1 foot at 3 seconds. A slight chance of showers. .TONIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 6 seconds and NE 2 ft at 3 seconds. A chance of showers. .FRI...NE winds around 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: NE 3 ft at 4 seconds and S 2 ft at 7 seconds. A chance of showers. .FRI NIGHT...NE winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 2 to 4 ft. Wave Detail: NE 3 ft at 4 seconds and S 1 foot at 7 seconds. A chance of showers after midnight. .SAT AND SAT NIGHT...NE winds 15 to 20 kt. Seas 2 to 3 ft. Wave Detail: NE 3 ft at 4 seconds and S 2 ft at 8 seconds. .SUN THROUGH MON 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 S 3 ft at 9 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. $$ ANZ237-100300- Block Island Sound- 1005 AM EDT Thu May 9 2024 .THIS AFTERNOON...N winds 5 to 10 kt, becoming E. Seas around 2 ft. Wave Detail: S 2 ft at 6 seconds and W 1 foot at 2 seconds. A slight chance of showers. .TONIGHT...E winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SE 2 ft at 5 seconds and E 1 foot at 10 seconds. A chance of showers. .FRI...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: E 3 ft at 4 seconds and S 2 ft at 7 seconds. A chance of showers. .FRI NIGHT...NE winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 3 to 4 ft. Wave Detail: E 3 ft at 5 seconds and S 1 foot at 7 seconds. A chance of showers after midnight. .SAT AND SAT NIGHT...NE winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: E 2 ft at 5 seconds and S 2 ft at 8 seconds. .SUN THROUGH MON NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 7 seconds and SW 2 ft at 3 seconds. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-100300- Boston Harbor- 1005 AM EDT Thu May 9 2024 .THIS AFTERNOON...N winds 5 to 10 kt, becoming E. Waves 1 foot or less. .TONIGHT...NE winds 10 to 15 kt. Waves 2 to 3 ft. A chance of showers in the evening. .FRI...NE winds 10 to 15 kt. Gusts up to 20 kt in the morning. Waves around 2 ft. .FRI NIGHT...NE winds 10 to 15 kt. Waves around 2 ft. .SAT AND SAT NIGHT...NE winds 10 to 15 kt. Waves around 2 ft. .SUN THROUGH MON NIGHT...SW 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. $$ ANZ236-100300- Narragansett Bay- 1005 AM EDT Thu May 9 2024 .THIS AFTERNOON...N winds around 10 kt, becoming NE. Waves around 2 ft. A slight chance of showers. .TONIGHT...NE winds 5 to 10 kt. Gusts up to 20 kt after midnight. Waves around 2 ft. A chance of showers. .FRI...NE winds 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft. .FRI NIGHT...NE winds 10 to 15 kt. Waves 2 to 3 ft. .SAT AND SAT NIGHT...N winds 10 to 15 kt. Waves 2 to 3 ft. .SUN THROUGH MON NIGHT...SW winds 10 to 15 kt. Waves 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ For the latest updates...please visit our webpage at www.weather.gov/boston You can follow us on Facebook at www.facebook.com/NWSBoston You can follow us on Twitter at @NWSBoston