Coastal Waters Forecast
Issued by NWS Boston, MA

Current Version | Previous Version | Text Only | Print | Product List | Glossary Off
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
246 FZUS51 KBOX 172316 CWFBOX Coastal Waters Forecast National Weather Service Boston/Norton MA 716 PM EDT Tue Apr 17 2018 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ200-181200- 716 PM EDT Tue Apr 17 2018 .Synopsis for Massachusetts and Rhode Island coastal waters... Low pressure departs through the Maritimes today and Wednesday. Brief weak high pres will move over the waters Wed, followed by another low pressure area approaching from the southwest on Thu. This low may linger near the Maritimes for Fri. High pres to build over the waters this weekend. For information on possible hazardous weather beyond the 24-36 hour forecast period, please visit www.weather.gov/boston and follow the Current Hazards link above the map on the left. $$ ANZ250-181200- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 716 PM EDT Tue Apr 17 2018 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY EVENING... .TONIGHT...W winds 10 to 15 kt, increasing to 15 to 20 kt after midnight. Gusts up to 25 kt. Seas 5 to 7 ft. A slight chance of rain and snow showers this evening. .WED...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 7 ft. .WED NIGHT...W winds 10 to 15 kt, becoming SW 5 to 10 kt after midnight. Gusts up to 25 kt. Seas 2 to 4 ft. A chance of rain. .THU...SE winds 10 to 15 kt, becoming NE with gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Rain likely. Vsby 1 NM or less. .THU NIGHT...N winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Rain likely. Vsby 1 NM or less. .FRI...NW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. A chance of rain. .FRI NIGHT...NW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt after midnight. Seas 2 to 3 ft. .SAT...NW winds 10 to 15 kt. Seas 2 to 3 ft. .SAT NIGHT...NW winds 5 to 10 kt. Seas around 2 ft. .SUN...N winds 5 to 10 kt. Seas around 2 ft. .SUN NIGHT...W winds 5 to 10 kt. Seas 1 foot or less. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-181200- Massachusetts Bay and Ipswich Bay- 716 PM EDT Tue Apr 17 2018 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY AFTERNOON... .TONIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 6 ft. A slight chance of rain and snow showers this evening. .WED...W winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. .WED NIGHT...W winds 10 to 15 kt, becoming SW 5 to 10 kt after midnight. Gusts up to 20 kt. Seas 2 to 4 ft. A chance of rain. .THU...E winds 5 to 10 kt, becoming NE 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Rain likely. Vsby 1 NM or less. .THU NIGHT...N winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Rain likely. Vsby 1 NM or less. .FRI...NW winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt in the afternoon. Seas 2 to 3 ft. A chance of rain. .FRI NIGHT...NW winds 5 to 10 kt. Seas 2 to 3 ft. .SAT...NW winds 5 to 10 kt. Seas around 2 ft. .SAT NIGHT...NW winds 5 to 10 kt. Seas around 2 ft. .SUN...N winds 5 to 10 kt. Seas 1 foot or less. .SUN NIGHT...W winds 5 to 10 kt. Seas 1 foot or less. 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. $$ ANZ231-181200- Cape Cod Bay- 716 PM EDT Tue Apr 17 2018 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING... .TONIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of rain and snow showers this evening. A slight chance of rain and snow showers after midnight. .WED...W winds 15 to 20 kt, becoming SW 10 to 15 kt in the afternoon. Gusts up to 25 kt. Seas 2 to 3 ft. .WED NIGHT...W winds 10 to 15 kt with gusts up to 20 kt, becoming SW 5 to 10 kt after midnight. Seas around 2 ft. A chance of rain. .THU...E winds 5 to 10 kt, becoming NE in the afternoon. Seas around 2 ft. A chance of rain. Vsby 1 NM or less. .THU NIGHT...N winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Rain likely. Vsby 1 NM or less. .FRI...NW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. A chance of rain. .FRI NIGHT...NW winds 5 to 10 kt. Gusts up to 20 kt after midnight. Seas around 2 ft. .SAT...NW winds 5 to 10 kt. Seas around 2 ft. .SAT NIGHT...NW winds 5 to 10 kt. Seas 1 foot or less. .SUN...N winds 5 to 10 kt. Seas 1 foot or less. .SUN NIGHT...W winds 5 to 10 kt. Seas 1 foot or less. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-181200- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 716 PM EDT Tue Apr 17 2018 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE WEDNESDAY NIGHT... .TONIGHT...SW winds 15 to 20 kt, becoming W 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 6 to 9 ft. A chance of rain and snow showers this evening. A slight chance of rain and snow showers after midnight. .WED...SW winds 15 to 20 kt with gusts up to 30 kt. Seas 5 to 8 ft. .WED NIGHT...SW winds 15 to 20 kt with gusts up to 30 kt, diminishing to 5 to 10 kt with gusts up to 20 kt after midnight. Seas 4 to 7 ft. A chance of rain. .THU...SE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. A chance of rain. Vsby 1 NM or less. .THU NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 7 ft. A chance of rain. Vsby 1 NM or less. .FRI...NW winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 6 ft. A chance of rain. .FRI NIGHT...NW winds 10 to 15 kt. Gusts up to 20 kt after midnight. Seas 3 to 5 ft. .SAT...NW winds 5 to 10 kt. Seas 2 to 4 ft. .SAT NIGHT...NW winds 5 to 10 kt. Seas 2 to 3 ft. .SUN...NW winds 5 to 10 kt. Seas around 2 ft. .SUN NIGHT...W winds 5 to 10 kt. Seas 1 foot or less. 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. $$ ANZ255-181200- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- 716 PM EDT Tue Apr 17 2018 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE WEDNESDAY NIGHT... .TONIGHT...W winds 15 to 20 kt with gusts up to 30 kt. Seas 7 to 9 ft. A chance of rain and snow showers. .WED...W winds 15 to 20 kt, becoming SW 20 to 25 kt in the afternoon. Gusts up to 30 kt. Seas 6 to 9 ft. .WED NIGHT...SW winds 15 to 20 kt with gusts up to 30 kt, diminishing to 5 to 10 kt with gusts up to 20 kt after midnight. Seas 4 to 7 ft. A chance of rain. .THU...SE winds 10 to 15 kt, becoming SW in the afternoon. Gusts up to 20 kt. Seas 4 to 6 ft. A chance of rain. Vsby 1 NM or less. .THU NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 5 to 8 ft. A chance of rain. Vsby 1 NM or less. .FRI...NW winds 15 to 20 kt, diminishing to 10 to 15 kt in the afternoon. Seas 4 to 7 ft. .FRI NIGHT...NW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt after midnight. Seas 3 to 5 ft. .SAT...NW winds 10 to 15 kt. Seas 2 to 4 ft. .SAT NIGHT...NW winds 5 to 10 kt. Seas around 2 ft. .SUN...W winds 5 to 10 kt. Seas around 2 ft. .SUN NIGHT...W winds 5 to 10 kt. Seas 1 foot or less. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-181200- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 716 PM EDT Tue Apr 17 2018 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE WEDNESDAY NIGHT... .TONIGHT...W winds 15 to 20 kt with gusts up to 25 kt. Seas 6 to 9 ft. A chance of rain and snow showers, mainly this evening. .WED...W winds 15 to 20 kt, becoming SW 20 to 25 kt in the afternoon. Gusts up to 30 kt. Seas 6 to 8 ft. .WED NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt, becoming S 5 to 10 kt after midnight. Seas 4 to 7 ft. Rain likely. .THU...SE winds 5 to 10 kt, becoming SW 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 4 to 7 ft. A chance of rain. Vsby 1 NM or less. .THU NIGHT...W winds 15 to 20 kt with gusts up to 25 kt. Seas 6 to 9 ft. A chance of rain. Vsby 1 to 3 NM. .FRI...NW winds 15 to 20 kt, diminishing to 10 to 15 kt in the afternoon. Gusts up to 25 kt. Seas 4 to 7 ft. A chance of rain. .FRI NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. .SAT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. .SAT NIGHT...NW winds 5 to 10 kt. Seas around 2 ft. .SUN...W winds around 10 kt. Seas around 2 ft. .SUN NIGHT...W winds 5 to 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. $$ ANZ232-181200- Nantucket Sound- 716 PM EDT Tue Apr 17 2018 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY EVENING... .TONIGHT...W winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 2 to 4 ft. A chance of rain and snow showers. .WED...W winds 15 to 20 kt with gusts up to 30 kt. Seas 2 to 4 ft. .WED NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt, diminishing to 5 to 10 kt after midnight. Seas 2 to 4 ft. Rain likely. .THU...E winds 5 to 10 kt, becoming NW in the afternoon. Seas 2 to 3 ft. A chance of rain. Vsby 1 NM or less. .THU NIGHT...NW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt after midnight. Seas 2 to 3 ft. A chance of rain. Vsby 1 NM or less. .FRI...NW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of rain. .FRI NIGHT...NW winds 5 to 10 kt. Gusts up to 20 kt after midnight. Seas around 2 ft. .SAT...NW winds 5 to 10 kt. Seas around 2 ft. .SAT NIGHT...W winds 5 to 10 kt. Seas 1 foot or less. .SUN...NW winds 5 to 10 kt. Seas 1 foot or less. .SUN NIGHT...W winds around 5 kt. Seas 1 foot or less. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-181200- Vineyard Sound- 716 PM EDT Tue Apr 17 2018 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY EVENING... .TONIGHT...W winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 3 to 5 ft. A chance of rain and snow showers. .WED...W winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. .WED NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt, diminishing to 5 to 10 kt after midnight. Seas 2 to 4 ft. Rain likely. .THU...E winds 5 to 10 kt, becoming NW in the afternoon. Seas 2 to 3 ft. A chance of rain. Vsby 1 NM or less. .THU NIGHT...NW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt after midnight. Seas 2 to 4 ft. Rain likely. Vsby 1 to 3 NM. .FRI...NW winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt in the afternoon. Seas 2 to 4 ft. A chance of rain. .FRI NIGHT...NW winds 5 to 10 kt. Seas 2 to 3 ft. .SAT...NW winds around 10 kt. Seas around 2 ft. .SAT NIGHT...NW winds 5 to 10 kt. Seas 1 foot or less. .SUN...W winds 5 to 10 kt. Seas 1 foot or less. .SUN NIGHT...W winds 5 to 10 kt. Seas 1 foot or less. 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. $$ ANZ234-181200- Buzzards Bay- 716 PM EDT Tue Apr 17 2018 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY EVENING... .TONIGHT...W winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 2 to 4 ft. A chance of rain and snow showers this evening. A slight chance of rain and snow showers after midnight. .WED...W winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. .WED NIGHT...SW winds 10 to 15 kt with gusts up to 25 kt, diminishing to 5 to 10 kt after midnight. Seas 2 to 4 ft. Rain likely. .THU...E winds 5 to 10 kt, becoming NW in the afternoon. Seas 2 to 3 ft. A chance of rain. Vsby 1 to 3 NM. .THU NIGHT...NW winds 5 to 10 kt. Gusts up to 20 kt after midnight. Seas 2 to 3 ft. Rain likely. Vsby 1 to 3 NM. .FRI...NW winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt in the afternoon. Seas 2 to 3 ft. A chance of rain. .FRI NIGHT...NW winds 5 to 10 kt. Seas around 2 ft. .SAT...NW winds 5 to 10 kt. Seas 1 foot or less. .SAT NIGHT...NW winds 5 to 10 kt. Seas 1 foot or less. .SUN...W winds 5 to 10 kt. Seas 1 foot or less. .SUN NIGHT...W winds 5 to 10 kt. Seas 1 foot or less. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-181200- Rhode Island Sound- 716 PM EDT Tue Apr 17 2018 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY EVENING... .TONIGHT...W winds 15 to 20 kt with gusts up to 25 kt. Seas 5 to 8 ft. A chance of rain and snow showers, mainly this evening. .WED...W winds 15 to 20 kt, becoming SW 20 to 25 kt in the afternoon. Gusts up to 30 kt. Seas 5 to 7 ft. .WED NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt, becoming S 5 to 10 kt after midnight. Seas 4 to 6 ft. Rain likely. .THU...E winds 5 to 10 kt, becoming NW in the afternoon. Seas 3 to 5 ft. A chance of rain. Vsby 1 NM or less. .THU NIGHT...NW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt after midnight. Seas 4 to 7 ft. Rain likely. Vsby 1 to 3 NM. .FRI...NW winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt in the afternoon. Seas 3 to 5 ft. A chance of rain. .FRI NIGHT...NW winds 5 to 10 kt, increasing to 10 to 15 kt after midnight. Gusts up to 20 kt. Seas 2 to 3 ft. .SAT...NW winds around 10 kt with gusts up to 20 kt. Seas around 2 ft. .SAT NIGHT...NW winds 5 to 10 kt. Seas 1 foot or less. .SUN...W winds 5 to 10 kt. Seas 1 foot or less. .SUN NIGHT...W winds 5 to 10 kt. Seas 1 foot or less. 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. $$ ANZ237-181200- Block Island Sound- 716 PM EDT Tue Apr 17 2018 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY EVENING... .TONIGHT...W winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 4 to 7 ft. A chance of rain and snow showers this evening. .WED...W winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 6 ft. .WED NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt, becoming S 5 to 10 kt after midnight. Seas 2 to 4 ft. Rain likely. .THU...SE winds 5 to 10 kt, becoming NW in the afternoon. Seas 2 to 4 ft. A chance of rain. Vsby 1 NM or less. .THU NIGHT...NW winds 10 to 15 kt with gusts up to 25 kt. Seas 4 to 6 ft. A chance of rain. Vsby 1 to 3 NM. .FRI...NW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. A chance of rain. .FRI NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. .SAT...NW winds around 10 kt. Seas around 2 ft. .SAT NIGHT...NW winds around 10 kt. Seas 1 foot or less. .SUN...W winds 5 to 10 kt. Seas 1 foot or less. .SUN NIGHT...W winds 5 to 10 kt. Seas 1 foot or less. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-181200- Boston Harbor- 716 PM EDT Tue Apr 17 2018 .TONIGHT...W winds 5 to 10 kt with gusts up to 20 kt. Waves around 2 ft. A slight chance of rain and snow showers this evening. .WED...W winds 10 to 15 kt with gusts up to 25 kt. Waves around 2 ft. .WED NIGHT...W winds 10 to 15 kt with gusts up to 20 kt, becoming SW around 5 kt after midnight. Waves around 2 ft. A chance of rain. .THU...E winds 5 to 10 kt. Waves 1 foot or less. Rain likely. Vsby 1 NM or less. .THU NIGHT...N winds around 10 kt. Waves 1 foot or less. Rain likely. Vsby 1 to 3 NM. .FRI...NW winds 5 to 10 kt. Waves 1 foot or less. A chance of rain. .FRI NIGHT...NW winds 5 to 10 kt. Waves 1 foot or less. .SAT...NW winds 5 to 10 kt. Waves 1 foot or less. .SAT NIGHT...NW winds around 5 kt. Waves 1 foot or less. .SUN...N winds around 5 kt. Waves 1 foot or less. .SUN NIGHT...W winds around 5 kt. Waves 1 foot or less. 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. $$ ANZ236-181200- Narragansett Bay- 716 PM EDT Tue Apr 17 2018 .TONIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Waves 2 to 4 ft. A chance of rain and snow showers, mainly this evening. .WED...W winds 10 to 15 kt, becoming SW 15 to 20 kt in the afternoon. Gusts up to 25 kt. Waves 2 to 4 ft. .WED NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, becoming S around 5 kt after midnight. Waves 2 to 4 ft. Rain likely. .THU...E winds 5 to 10 kt, becoming N in the afternoon. Waves 2 to 3 ft. Rain likely. Vsby 1 to 3 NM. .THU NIGHT...NW winds 5 to 10 kt. Gusts up to 20 kt after midnight. Waves 2 to 3 ft. Rain likely. Vsby 1 to 3 NM. .FRI...NW winds 5 to 10 kt. Gusts up to 20 kt in the morning. Waves 2 to 3 ft. A chance of rain. .FRI NIGHT...NW winds 5 to 10 kt. Waves around 2 ft. .SAT...NW winds 5 to 10 kt. Waves 1 foot or less. .SAT NIGHT...NW winds 5 to 10 kt. Waves 1 foot or less. .SUN...W winds around 5 kt. Waves 1 foot or less. .SUN NIGHT...W winds around 5 kt. Waves 1 foot or less. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ 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

USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.