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
000 FZUS51 KBOX 242317 CWFBOX Coastal Waters Forecast National Weather Service Boston/Norton MA 716 PM EDT Wed Apr 24 2019 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ200-251200- 716 PM EDT Wed Apr 24 2019 .Synopsis for Massachusetts and Rhode Island coastal waters... High pressure over the waters through Thursday. Friday low pressure develops on an approaching frontal boundary. Periods of heavy rain are possible late Friday into Friday night. Windy conditions develop Saturday behind the departing storm system. A weak trough of low pressure moves across the waters Sunday. 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. $$ ANZ250-251200- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 716 PM EDT Wed Apr 24 2019 .TONIGHT...NW winds 5 to 10 kt. Seas 2 to 4 ft. .THU...NW winds 5 to 10 kt, becoming E in the afternoon. Seas 2 to 3 ft. .THU NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. .FRI...SE winds 10 to 15 kt, increasing to 15 to 20 kt in the afternoon. Gusts up to 25 kt. Seas 3 to 5 ft. Patchy fog. A chance of showers. Vsby 1 NM or less. .FRI NIGHT...SE winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 7 ft. Patchy fog. Showers. Vsby 1 NM or less. .SAT...W winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 7 ft. Patchy fog. A chance of showers. Vsby 1 NM or less. .SAT NIGHT...W winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 4 to 6 ft. .SUN...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. A chance of showers. .SUN NIGHT...W winds 10 to 15 kt with gusts up to 25 kt. Seas 4 to 6 ft. A chance of showers. .MON...W winds 10 to 15 kt with gusts up to 25 kt. Seas 4 to 6 ft. .MON NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-251200- Massachusetts Bay and Ipswich Bay- 716 PM EDT Wed Apr 24 2019 .TONIGHT...NW winds 5 to 10 kt. Seas 2 to 3 ft. .THU...N winds 5 to 10 kt, becoming E in the afternoon. Seas around 2 ft. .THU NIGHT...SE winds 10 to 15 kt with gusts up to 20 kt, becoming S 5 to 10 kt after midnight. Seas 2 to 3 ft. .FRI...SE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Patchy fog. A chance of showers. Vsby 1 NM or less. .FRI NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. Patchy fog. Showers. Vsby 1 NM or less. .SAT...W winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to 5 ft. Patchy fog. A chance of showers. .SAT NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. .SUN...SW winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers. .SUN NIGHT...W winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. A chance of showers. .MON...W winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. .MON NIGHT...W 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. $$ ANZ231-251200- Cape Cod Bay- 716 PM EDT Wed Apr 24 2019 .TONIGHT...NW winds 5 to 10 kt. Seas around 2 ft. .THU...NW winds 5 to 10 kt, becoming E in the afternoon. Seas 1 foot or less. .THU NIGHT...S winds 5 to 10 kt. Seas 1 foot or less. .FRI...SE winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 3 ft. Patchy fog. A chance of showers. Vsby 1 to 3 NM. .FRI NIGHT...S winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 3 ft. Patchy fog. Showers. Vsby 1 to 3 NM. .SAT...W winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 3 ft. Patchy fog. A chance of showers. Vsby 1 to 3 NM. .SAT NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. .SUN...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of showers. .SUN NIGHT...W winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. A chance of showers. .MON...NW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. .MON NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-251200- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 716 PM EDT Wed Apr 24 2019 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 AM EDT THURSDAY... .TONIGHT...NW winds 5 to 10 kt. Seas 3 to 5 ft. .THU...NW winds 5 to 10 kt, becoming E in the afternoon. Seas 2 to 4 ft. .THU NIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft. .FRI...SE winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to 5 ft. Patchy fog. A chance of showers. Vsby 1 NM or less. .FRI NIGHT...S winds 10 to 15 kt with gusts up to 25 kt. Seas 4 to 7 ft. Patchy fog. Showers likely. Vsby 1 NM or less. .SAT...W winds 15 to 20 kt with gusts up to 25 kt. Seas 5 to 7 ft. Patchy fog. A chance of showers. Vsby 1 NM or less. .SAT NIGHT...W winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 4 to 7 ft. .SUN...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. A chance of showers. .SUN NIGHT...W winds 10 to 15 kt with gusts up to 25 kt. Seas 4 to 7 ft. A chance of showers. .MON...NW winds 10 to 15 kt with gusts up to 25 kt. Seas 4 to 7 ft. .MON NIGHT...SW 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. $$ ANZ255-251200- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- 716 PM EDT Wed Apr 24 2019 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 AM EDT THURSDAY... .TONIGHT...NW winds 10 to 15 kt, diminishing to 5 to 10 kt after midnight. Gusts up to 20 kt. Seas 3 to 5 ft. .THU...NW winds 5 to 10 kt, becoming SW in the afternoon. Seas 2 to 4 ft. .THU NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Patchy fog. .FRI...SE winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to 5 ft. Patchy fog. A chance of showers. Vsby 1 to 3 NM. .FRI NIGHT...S winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 4 to 7 ft. Patchy fog. Showers likely. Vsby 1 NM or less. .SAT...W winds 20 to 25 kt with gusts up to 30 kt. Seas 6 to 9 ft. A chance of showers. Vsby 1 to 3 NM. .SAT NIGHT...W winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 5 to 8 ft. .SUN...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. A chance of showers. .SUN NIGHT...W winds around 15 kt with gusts up to 30 kt. Seas 5 to 8 ft. A chance of showers. .MON...NW winds 10 to 15 kt with gusts up to 25 kt. Seas 5 to 8 ft. .MON NIGHT...SW winds 5 to 10 kt. Seas 4 to 6 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-251200- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 716 PM EDT Wed Apr 24 2019 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 1 AM EDT THURSDAY... .TONIGHT...NW winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to 5 ft. .THU...NW winds 5 to 10 kt, becoming SW in the afternoon. Seas 2 to 4 ft. .THU NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Patchy fog. A chance of showers. .FRI...SE winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to 5 ft. Patchy fog. A chance of showers. Vsby 1 NM or less. .FRI NIGHT...S winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 7 ft. Patchy fog. Showers likely. Vsby 1 to 3 NM. .SAT...W winds 20 to 25 kt with gusts up to 30 kt. Seas 5 to 8 ft. A chance of showers. .SAT NIGHT...W winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 5 to 8 ft. .SUN...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. A chance of showers. .SUN NIGHT...W winds around 15 kt with gusts up to 30 kt. Seas 5 to 8 ft. A chance of showers. .MON...W winds 10 to 15 kt with gusts up to 25 kt. Seas 5 to 8 ft. .MON NIGHT...SW 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. $$ ANZ232-251200- Nantucket Sound- 716 PM EDT Wed Apr 24 2019 .TONIGHT...NW winds 5 to 10 kt. Seas 2 to 3 ft. .THU...NW winds 5 to 10 kt, becoming S in the afternoon. Seas around 2 ft. .THU NIGHT...S winds 5 to 10 kt. Seas 1 foot or less. Patchy fog. .FRI...SE winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. Patchy fog. A chance of showers. Vsby 1 to 3 NM. .FRI NIGHT...S winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. Patchy fog. Showers. Vsby 1 NM or less. .SAT...W winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. Patchy fog. A chance of showers. Vsby 1 to 3 NM. .SAT NIGHT...W winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 3 to 5 ft. .SUN...SW winds 10 to 15 kt. Seas 2 to 3 ft. A chance of showers. .SUN NIGHT...W winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. A chance of showers. .MON...NW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. .MON NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-251200- Vineyard Sound- 716 PM EDT Wed Apr 24 2019 .TONIGHT...NW winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Seas 2 to 3 ft. .THU...NW winds 5 to 10 kt, becoming SW in the afternoon. Seas around 2 ft. .THU NIGHT...S winds 5 to 10 kt. Seas 1 foot or less. Patchy fog. .FRI...SE winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. Patchy fog. A chance of showers. Vsby 1 to 3 NM. .FRI NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Patchy fog. Showers likely. Vsby 1 to 3 NM. .SAT...W winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. A chance of showers. .SAT NIGHT...W winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Seas 3 to 5 ft. .SUN...SW winds 10 to 15 kt. Seas 2 to 4 ft. A chance of showers. .SUN NIGHT...W winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to 5 ft. A chance of showers. .MON...W winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to 4 ft. .MON NIGHT...SW 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. $$ ANZ234-251200- Buzzards Bay- 716 PM EDT Wed Apr 24 2019 .TONIGHT...NW winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Seas 2 to 3 ft. .THU...NW winds 5 to 10 kt, becoming SW in the afternoon. Seas around 2 ft. .THU NIGHT...S winds 5 to 10 kt. Seas 1 foot or less. Patchy fog. .FRI...SE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Patchy fog. A chance of showers. Vsby 1 to 3 NM. .FRI NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Patchy fog. Showers. Vsby 1 to 3 NM. .SAT...W winds 10 to 15 kt, increasing to 15 to 20 kt in the afternoon. Gusts up to 25 kt. Seas 3 to 5 ft. A chance of showers. .SAT NIGHT...W winds 10 to 15 kt, diminishing to 5 to 10 kt after midnight. Gusts up to 20 kt. Seas 2 to 4 ft. .SUN...SW winds 10 to 15 kt. Seas 2 to 3 ft. A chance of showers. .SUN NIGHT...W winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. A chance of showers. .MON...W winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. .MON NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-251200- Rhode Island Sound- 716 PM EDT Wed Apr 24 2019 .TONIGHT...NW winds 15 to 20 kt, diminishing to 5 to 10 kt after midnight. Gusts up to 25 kt. Seas 2 to 4 ft. .THU...NW winds 5 to 10 kt, becoming SW in the afternoon. Seas 2 to 3 ft. .THU NIGHT...S winds 5 to 10 kt. Seas around 2 ft. Patchy fog. A chance of showers. .FRI...SE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. Patchy fog. A chance of showers. Vsby 1 to 3 NM. .FRI NIGHT...S winds 15 to 20 kt, becoming SW 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 4 to 6 ft. Patchy fog. Showers. Vsby 1 to 3 NM. .SAT...W winds 15 to 20 kt with gusts up to 30 kt. Seas 4 to 7 ft. A chance of showers. .SAT NIGHT...W winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Seas 4 to 7 ft. .SUN...SW winds 10 to 15 kt. Seas 3 to 5 ft. A chance of showers. .SUN NIGHT...W winds 10 to 15 kt with gusts up to 25 kt. Seas 4 to 6 ft. A chance of showers. .MON...W winds 10 to 15 kt with gusts up to 25 kt. Seas 4 to 6 ft. .MON NIGHT...SW 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. $$ ANZ237-251200- Block Island Sound- 716 PM EDT Wed Apr 24 2019 .TONIGHT...NW winds 5 to 10 kt. Gusts up to 20 kt this evening. Seas 2 to 4 ft. .THU...NW winds 5 to 10 kt, becoming SW in the afternoon. Seas 2 to 3 ft. .THU NIGHT...S winds 5 to 10 kt. Seas around 2 ft. Patchy fog. A chance of showers. .FRI...SE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. Patchy fog. A chance of showers. Vsby 1 NM or less. .FRI NIGHT...S winds 10 to 15 kt, becoming SW after midnight. Gusts up to 25 kt. Seas 3 to 5 ft. Patchy fog. Showers. Vsby 1 NM or less. .SAT...W winds 15 to 20 kt with gusts up to 30 kt. Seas 4 to 6 ft. A chance of showers. .SAT NIGHT...W winds 10 to 15 kt, diminishing to 5 to 10 kt after midnight. Gusts up to 20 kt. Seas 3 to 5 ft. .SUN...SW winds 10 to 15 kt. Seas 3 to 5 ft. A chance of showers. .SUN NIGHT...W winds 10 to 15 kt with gusts up to 30 kt. Seas 4 to 6 ft. A chance of showers. .MON...W winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to 5 ft. .MON NIGHT...SW winds 5 to 10 kt. Seas 2 to 4 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-251200- Boston Harbor- 716 PM EDT Wed Apr 24 2019 .TONIGHT...NW winds 5 to 10 kt. Gusts up to 20 kt this evening. Waves 1 foot or less. .THU...N winds 5 to 10 kt, becoming E in the afternoon. Waves 1 foot or less. .THU NIGHT...S winds 5 to 10 kt. Waves 1 foot or less. .FRI...SE 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. Patchy fog. A chance of showers. Vsby 1 NM or less. .FRI NIGHT...S winds 5 to 10 kt. Waves around 2 ft. Patchy fog. Showers. Vsby 1 NM or less. .SAT...W winds 10 to 15 kt with gusts up to 30 kt. Waves around 2 ft. Patchy fog. Showers likely. .SAT NIGHT...W winds 10 to 15 kt. Gusts up to 25 kt in the evening. Waves around 2 ft. .SUN...SW winds around 10 kt. Waves 1 foot or less. A chance of showers. .SUN NIGHT...W winds 5 to 10 kt with gusts up to 20 kt. Waves around 2 ft. A chance of showers. .MON...NW winds 5 to 10 kt with gusts up to 20 kt. Waves around 2 ft. .MON NIGHT...W 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. $$ ANZ236-251200- Narragansett Bay- 716 PM EDT Wed Apr 24 2019 .TONIGHT...NW winds 5 to 10 kt. Gusts up to 20 kt this evening. Waves 2 to 3 ft. .THU...NW winds around 5 kt, becoming SW in the afternoon. Waves around 2 ft. .THU NIGHT...S winds 5 to 10 kt. Waves around 2 ft. Patchy fog. A chance of showers. .FRI...SE winds 5 to 10 kt with gusts up to 20 kt. Waves 2 to 3 ft. Patchy fog. A chance of showers. Vsby 1 to 3 NM. .FRI NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Waves 2 to 4 ft. Patchy fog. Showers. Vsby 1 to 3 NM. .SAT...W winds 10 to 15 kt, increasing to 15 to 20 kt in the afternoon. Gusts up to 25 kt. Waves 2 to 4 ft. A chance of showers. .SAT NIGHT...W winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Waves 2 to 3 ft. .SUN...SW winds 5 to 10 kt. Waves 2 to 3 ft. A chance of showers. .SUN NIGHT...W winds around 10 kt with gusts up to 20 kt. Waves 2 to 3 ft. A chance of showers. .MON...W winds 5 to 10 kt with gusts up to 20 kt. Waves 2 to 3 ft. .MON NIGHT...SW winds 5 to 10 kt. Waves 2 to 3 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ 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.