Coastal Waters Forecast
Issued by NWS Boston, MA

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000 FZUS51 KBOX 172302 CWFBOX Coastal Waters Forecast for Massachusetts and Rhode Island National Weather Service Boston/Norton MA 701 PM EDT Wed Apr 17 2024 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ200-181200- 701 PM EDT Wed Apr 17 2024 .Synopsis for Massachusetts and Rhode Island coastal waters... High pres shifts into the Gulf of ME this evening. A warm front lifts toward the southern waters on Thu, while high pres remains planted over the Gulf of ME/Nova Scotia. The high nudges back in for much of Fri before a cold front sweeps through late Fri into Sat. $$ ANZ250-181200- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 701 PM EDT Wed Apr 17 2024 .TONIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 2 ft at 8 seconds and N 1 ft at 4 seconds. .THU...E winds around 10 kt. Seas 2 to 3 ft. Wave Detail: NE 2 ft at 4 seconds and SE 2 ft at 8 seconds. .THU NIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 2 ft at 4 seconds and E 2 ft at 12 seconds. .FRI...E winds 5 to 10 kt, becoming SE 10 to 15 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: E 2 ft at 5 seconds and E 2 ft at 11 seconds. .FRI NIGHT AND SAT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: S 3 ft at 4 seconds and E 2 ft at 11 seconds. A chance of showers. .SAT NIGHT...W winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: W 3 ft at 4 seconds and SE 2 ft at 5 seconds. .SUN THROUGH MON...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. .MON NIGHT...S winds around 10 kt. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-181200- Massachusetts Bay and Ipswich Bay- 701 PM EDT Wed Apr 17 2024 .TONIGHT...SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 2 ft at 3 seconds and E 2 ft at 9 seconds. .THU...E winds around 10 kt. Seas around 2 ft. Wave Detail: E 2 ft at 4 seconds and E 2 ft at 8 seconds. .THU NIGHT...E winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 2 ft at 4 seconds and SE 1 ft at 8 seconds. .FRI...E winds 5 to 10 kt, becoming SE 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas around 2 ft. Wave Detail: SE 2 ft at 5 seconds and E 1 ft at 11 seconds. .FRI NIGHT AND SAT...SW winds 15 to 20 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 4 seconds and SE 2 ft at 4 seconds. A chance of showers. .SAT NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: W 2 ft at 3 seconds and SE 1 ft at 5 seconds. .SUN THROUGH MON NIGHT...S winds 10 to 15 kt with gusts up to 20 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. $$ ANZ231-181200- Cape Cod Bay- 701 PM EDT Wed Apr 17 2024 .TONIGHT...SE winds 5 to 10 kt. Seas around 2 ft this evening, then 1 foot or less. Wave Detail: N 1 ft at 3 seconds and E 1 ft at 3 seconds, becoming NW 1 ft at 3 seconds and E 1 ft at 4 seconds. .THU...E winds around 10 kt. Seas 1 foot or less, then around 2 ft in the afternoon. Wave Detail: E 1 ft at 3 seconds and SE 1 ft at 8 seconds, becoming E 1 ft at 2 seconds and SE 1 ft at 7 seconds. .THU NIGHT...E winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 1 ft at 3 seconds and SE 1 ft at 7 seconds. .FRI...SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 6 seconds and E 1 ft at 3 seconds. .FRI NIGHT AND SAT...SW winds around 10 kt. Seas around 2 ft. Wave Detail: S 2 ft at 4 seconds and SE 1 ft at 3 seconds. A chance of showers through the day. .SAT NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: W 2 ft at 3 seconds and SE 1 ft at 6 seconds. .SUN THROUGH MON NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-181200- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 701 PM EDT Wed Apr 17 2024 .TONIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 8 seconds and N 1 ft at 4 seconds. .THU...E winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: E 2 ft at 3 seconds and SE 2 ft at 7 seconds. .THU NIGHT...E winds 10 to 15 kt, diminishing to 5 to 10 kt after midnight. Seas 2 to 4 ft. Wave Detail: E 2 ft at 4 seconds and S 2 ft at 7 seconds. .FRI...E winds around 10 kt. Seas 3 to 4 ft. Wave Detail: E 2 ft at 5 seconds and E 2 ft at 11 seconds. .FRI NIGHT...S winds around 10 kt. Seas around 3 ft. Wave Detail: SE 3 ft at 5 seconds and E 2 ft at 11 seconds. .SAT...SW winds around 10 kt. Seas around 3 ft. Wave Detail: S 3 ft at 4 seconds and E 2 ft at 11 seconds. A chance of showers. .SAT NIGHT...W winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to 4 ft. .SUN THROUGH MON...W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. .MON NIGHT...S winds around 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. $$ ANZ255-181200- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- 701 PM EDT Wed Apr 17 2024 .TONIGHT...E winds 10 to 15 kt. Gusts up to 20 kt after midnight. Seas 2 to 3 ft. Wave Detail: S 3 ft at 7 seconds and E 1 ft at 3 seconds. A slight chance of showers. .THU...E winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: E 3 ft at 3 seconds and SE 2 ft at 7 seconds. .THU NIGHT...E winds around 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. Wave Detail: SE 3 ft at 5 seconds and SE 1 ft at 12 seconds. .FRI...E winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: SE 4 ft at 7 seconds and E 1 ft at 4 seconds. .FRI NIGHT...SE winds 10 to 15 kt. Seas 2 to 4 ft. Wave Detail: SE 4 ft at 7 seconds and E 1 ft at 4 seconds. .SAT...SW winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 6 seconds and W 2 ft at 4 seconds. A chance of showers. .SAT NIGHT...W winds around 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. .SUN THROUGH MON NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-181200- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 701 PM EDT Wed Apr 17 2024 ...SMALL CRAFT ADVISORY IN EFFECT FROM 5 AM EDT THURSDAY THROUGH THURSDAY EVENING... .TONIGHT...SE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 8 seconds and SE 2 ft at 3 seconds. A chance of showers this evening, then showers likely after midnight. Patchy fog after midnight. .THU...E winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 4 ft. Wave Detail: SE 4 ft at 5 seconds and SE 1 ft at 14 seconds. A chance of showers in the morning. .THU NIGHT...E winds around 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. Wave Detail: E 4 ft at 6 seconds and SE 1 ft at 12 seconds. .FRI...E winds 10 to 15 kt. Seas 3 to 5 ft. Wave Detail: SE 4 ft at 7 seconds and NE 1 ft at 3 seconds. .FRI NIGHT AND SAT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. Wave Detail: SE 4 ft at 7 seconds and W 2 ft at 4 seconds. A chance of showers through the day. .SAT NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas around 3 ft. Wave Detail: W 3 ft at 4 seconds and SE 3 ft at 7 seconds. .SUN THROUGH MON NIGHT...S 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. $$ ANZ232-181200- Nantucket Sound- 701 PM EDT Wed Apr 17 2024 .TONIGHT...SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 1 ft at 2 seconds and N 1 ft at 3 seconds. .THU...E winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: E 2 ft at 3 seconds and SE 1 ft at 7 seconds. .THU NIGHT...E winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas around 2 ft. Wave Detail: E 2 ft at 3 seconds and S 1 ft at 6 seconds. .FRI...E winds around 10 kt. Seas 2 to 3 ft. Wave Detail: SE 2 ft at 5 seconds and E 1 ft at 12 seconds. .FRI NIGHT...S winds around 10 kt. Seas around 2 ft. Wave Detail: E 2 ft at 4 seconds and S 2 ft at 4 seconds. A chance of showers after midnight. .SAT...SW winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and E 1 ft at 5 seconds. A chance of showers in the morning. .SAT NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. .SUN THROUGH MON NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-181200- Vineyard Sound- 701 PM EDT Wed Apr 17 2024 .TONIGHT...SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 1 ft at 3 seconds and S 1 ft at 7 seconds. A slight chance of showers. .THU...E winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: E 2 ft at 3 seconds and SE 2 ft at 6 seconds. .THU NIGHT...E winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 2 to 3 ft. Wave Detail: E 2 ft at 3 seconds and SE 2 ft at 6 seconds. .FRI...E winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SE 2 ft at 7 seconds and E 1 ft at 2 seconds. .FRI NIGHT AND SAT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: S 2 ft at 5 seconds and SE 1 ft at 3 seconds. A chance of showers through the day. .SAT NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: W 2 ft at 4 seconds and S 2 ft at 7 seconds. .SUN THROUGH MON NIGHT...SW winds 10 to 15 kt with gusts up to 20 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. $$ ANZ234-181200- Buzzards Bay- 701 PM EDT Wed Apr 17 2024 .TONIGHT...SE winds 5 to 10 kt. Seas around 2 ft this evening, then 1 foot or less. Wave Detail: E 1 ft at 2 seconds and SW 1 ft at 2 seconds, becoming E 1 ft at 2 seconds and S 1 ft at 7 seconds. A slight chance of showers after midnight. .THU...E winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: E 2 ft at 3 seconds and S 1 ft at 7 seconds. .THU NIGHT...E winds 10 to 15 kt, diminishing to 5 to 10 kt after midnight. Seas around 2 ft. Wave Detail: E 2 ft at 3 seconds and SE 2 ft at 6 seconds. .FRI...E winds 5 to 10 kt, becoming SE 10 to 15 kt in the afternoon. Seas around 2 ft. Wave Detail: SE 2 ft at 7 seconds and E 1 ft at 2 seconds. .FRI NIGHT AND SAT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: S 2 ft at 4 seconds and SE 1 ft at 3 seconds. A chance of showers through the day. .SAT NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 5 seconds and E 1 ft at 5 seconds. .SUN THROUGH MON NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-181200- Rhode Island Sound- 701 PM EDT Wed Apr 17 2024 .TONIGHT...SE winds 10 to 15 kt. Gusts up to 20 kt after midnight. Seas 2 to 3 ft. Wave Detail: S 3 ft at 8 seconds and SE 1 ft at 3 seconds. A chance of showers. .THU...E winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 5 seconds and SE 1 ft at 14 seconds. A chance of showers in the morning. .THU NIGHT...E winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 2 to 4 ft. Wave Detail: SE 4 ft at 7 seconds and E 2 ft at 4 seconds. .FRI...E winds 10 to 15 kt. Seas 2 to 4 ft. Wave Detail: SE 3 ft at 7 seconds and NE 1 ft at 3 seconds. .FRI NIGHT AND SAT...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 SW 2 ft at 4 seconds. A chance of showers through the day. .SAT NIGHT...W 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 SE 2 ft at 7 seconds. .SUN THROUGH MON NIGHT...SW 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. $$ ANZ237-181200- Block Island Sound- 701 PM EDT Wed Apr 17 2024 ...SMALL CRAFT ADVISORY IN EFFECT FROM 5 AM EDT THURSDAY THROUGH THURSDAY AFTERNOON... .TONIGHT...SE winds 10 to 15 kt. Gusts up to 20 kt after midnight. Seas around 2 ft. Wave Detail: S 2 ft at 8 seconds and SE 1 ft at 3 seconds. Showers likely. Patchy fog after midnight. .THU...E winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at 4 seconds and SE 3 ft at 7 seconds. A chance of showers. .THU NIGHT...NE winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 2 to 4 ft. Wave Detail: E 4 ft at 6 seconds and SE 1 ft at 13 seconds. A chance of showers in the evening. .FRI...E winds 10 to 15 kt. Seas 2 to 4 ft. Wave Detail: SE 4 ft at 7 seconds and E 1 ft at 4 seconds. .FRI NIGHT AND SAT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 7 seconds and W 2 ft at 3 seconds. A chance of showers through the day. .SAT NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: W 2 ft at 4 seconds and SE 2 ft at 7 seconds. .SUN THROUGH MON NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-181200- Boston Harbor- 701 PM EDT Wed Apr 17 2024 .TONIGHT...SE winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Waves 1 foot or less. .THU...E winds 10 to 15 kt. Waves 1 foot or less. .THU NIGHT...E winds 5 to 10 kt. Waves 1 foot or less. .FRI...E winds 5 to 10 kt, becoming SE 15 to 20 kt in the afternoon. Waves 1 foot or less, then around 2 ft in the afternoon. .FRI NIGHT AND SAT...W winds 15 to 20 kt. Waves around 2 ft. A chance of showers. .SAT NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft. .SUN THROUGH MON NIGHT...SW winds 10 to 15 kt with gusts up to 20 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. $$ ANZ236-181200- Narragansett Bay- 701 PM EDT Wed Apr 17 2024 .TONIGHT...SE winds 5 to 10 kt. Waves around 2 ft. A chance of showers. .THU...E winds 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft. .THU NIGHT...NE winds 5 to 10 kt. Waves around 2 ft. A chance of showers in the evening. .FRI...E winds 5 to 10 kt, becoming SE 10 to 15 kt with gusts up to 20 kt in the afternoon. Waves 2 to 3 ft. .FRI NIGHT AND SAT...SW winds 10 to 15 kt with gusts up to 20 kt. Waves 2 to 3 ft. A chance of showers through the day. .SAT NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft. .SUN THROUGH MON NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ 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

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