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National Weather Service Marine Forecast FZUS51 KBOX

FZUS51 KBOX 022105
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
404 PM EST Fri Jan 2 2026

Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM

ANZ200-031000
404 PM EST Fri Jan 2 2026

Synopsis for Massachusetts and Rhode Island coastal waters

High pres over Southern New England continues into Sat. Low pres is expected to track well SE of the 40N/70W benchmark on Sun, followed by another high pres for Mon. Low pres may return Tue or Wed passing west of the waters.

ANZ250-031000
Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary
404 PM EST Fri Jan 2 2026

SMALL CRAFT ADVISORY IN EFFECT THROUGH SATURDAY MORNING

TONIGHT
W winds 15 to 20 kt, increasing to 20 to 25 kt after midnight. Seas 3 to 5 ft. Wave Detail: W 5 ft at 5 seconds and E 1 foot at 11 seconds. Light freezing spray.

SAT
W winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: W 5 ft at 5 seconds and E 1 foot at 11 seconds. Light freezing spray in the morning.

SAT NIGHT
W winds 10 to 15 kt, becoming NW 5 to 10 kt after midnight. Seas 2 to 3 ft. Wave Detail: W 3 ft at 4 seconds and E 1 foot at 11 seconds. A chance of snow after midnight.

SUN
NW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas around 2 ft. Wave Detail: NW 2 ft at 3 seconds and E 1 foot at 10 seconds. A chance of snow in the morning.

SUN NIGHT
NW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: NW 4 ft at 5 seconds and NE 2 ft at 8 seconds. Light freezing spray.

MON AND MON NIGHT
SW winds 15 to 20 kt. Seas 2 to 4 ft. Wave Detail: NW 4 ft at 5 seconds and NE 3 ft at 8 seconds.

TUE
S winds 5 to 10 kt. Seas around 2 ft. A chance of rain.

TUE NIGHT AND WED
S winds 5 to 10 kt, becoming W. Seas around 2 ft. A chance of rain.

WED NIGHT
W winds around 10 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.

ANZ251-031000
Massachusetts Bay and Ipswich Bay
404 PM EST Fri Jan 2 2026

TONIGHT
W winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: W 3 ft at 4 seconds and E 1 foot at 11 seconds. Light freezing spray.

SAT
W winds 15 to 20 kt, diminishing to 10 to 15 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: W 3 ft at 4 seconds and E 1 foot at 11 seconds. Light freezing spray in the morning.

SAT NIGHT
W winds 5 to 10 kt. Seas around 2 ft in the evening, then 1 foot or less. Wave Detail: NW 2 ft at 3 seconds and E 1 foot at 11 seconds, becoming NW 1 foot at 3 seconds and E 1 foot at 10 seconds. A chance of snow after midnight.

SUN
NW winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft in the afternoon. Wave Detail: NW 1 foot at 3 seconds and E 1 foot at 10 seconds, becoming NW 1 foot at 3 seconds and E 1 foot at 9 seconds. A chance of snow in the morning.

SUN NIGHT
NW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: NW 3 ft at 4 seconds and E 1 foot at 9 seconds. Light freezing spray in the evening.

MON AND MON NIGHT
SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: NW 3 ft at 4 seconds and NE 2 ft at 7 seconds.

TUE
S winds 5 to 10 kt. Seas around 2 ft.

TUE NIGHT AND WED
S winds 5 to 10 kt, becoming W. Seas around 2 ft. A chance of rain.

WED NIGHT
W 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.

ANZ231-031000
Cape Cod Bay
404 PM EST Fri Jan 2 2026

TONIGHT
W winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: W 3 ft at 4 seconds and E 1 foot at 11 seconds. Light freezing spray.

SAT
W winds 15 to 20 kt, diminishing to 10 to 15 kt in the afternoon. Gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: NW 3 ft at 4 seconds and E 1 foot at 11 seconds. Light freezing spray in the morning.

SAT NIGHT
W winds 5 to 10 kt. Seas around 2 ft in the evening, then 1 foot or less. Wave Detail: NW 2 ft at 4 seconds and E 1 foot at 10 seconds, becoming NW 1 foot at 4 seconds and E 1 foot at 10 seconds. A chance of snow after midnight.

SUN
NW winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft in the afternoon. Wave Detail: NW 1 foot at 4 seconds and NE 1 foot at 8 seconds, becoming NW 1 foot at 3 seconds and E 1 foot at 9 seconds. A chance of snow in the morning.

SUN NIGHT AND MON
W winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: NW 3 ft at 5 seconds and NE 2 ft at 8 seconds.

MON NIGHT
SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: N 2 ft at 7 seconds and NW 1 foot at 4 seconds.

TUE
S winds 5 to 10 kt. Seas around 2 ft.

TUE NIGHT AND WED
S winds around 5 kt, becoming SW. Seas 1 foot or less. A chance of rain.

WED 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.

ANZ254-031000
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm
404 PM EST Fri Jan 2 2026

SMALL CRAFT ADVISORY IN EFFECT THROUGH SATURDAY MORNING

TONIGHT
W winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: NW 5 ft at 5 seconds and E 1 foot at 11 seconds.

SAT
W winds 15 to 20 kt, diminishing to 10 to 15 kt in the afternoon. Gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: NW 5 ft at 5 seconds and E 1 foot at 11 seconds. Light freezing spray in the morning.

SAT NIGHT
NW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: W 3 ft at 5 seconds and E 1 foot at 10 seconds. A chance of snow after midnight.

SUN
NW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: NW 3 ft at 4 seconds and E 1 foot at 9 seconds. A chance of snow. Vsby 1 to 3 NM in the morning.

SUN NIGHT
NW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: NW 4 ft at 5 seconds and NE 2 ft at 10 seconds.

MON
NW winds 15 to 20 kt, diminishing to 5 to 10 kt in the afternoon. Seas 3 to 5 ft. Wave Detail: N 4 ft at 6 seconds.

MON NIGHT
SW winds 5 to 10 kt. Seas 2 to 4 ft.

TUE
S winds 5 to 10 kt. Seas 2 to 3 ft.

TUE NIGHT AND WED
S winds 5 to 10 kt, becoming SW. Seas 2 to 3 ft. A chance of rain.

WED NIGHT
W 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.

ANZ255-031000
Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket
404 PM EST Fri Jan 2 2026

SMALL CRAFT ADVISORY IN EFFECT THROUGH SATURDAY AFTERNOON

TONIGHT
NW winds 20 to 25 kt. Seas 4 to 6 ft. Wave Detail: W 6 ft at 7 seconds and E 1 foot at 12 seconds.

SAT
NW winds 15 to 20 kt, becoming W 10 to 15 kt in the afternoon. Seas 3 to 5 ft. Wave Detail: W 5 ft at 6 seconds and S 2 ft at 10 seconds.

SAT NIGHT
NW winds 10 to 15 kt, becoming N around 5 kt after midnight. Seas 2 to 3 ft. Wave Detail: W 3 ft at 6 seconds and E 1 foot at 11 seconds. A chance of snow after midnight.

SUN
N winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: NW 3 ft at 5 seconds and E 1 foot at 10 seconds. A chance of snow in the morning.

SUN NIGHT AND MON
NW winds 20 to 25 kt. Seas 3 to 5 ft. Wave Detail: NW 5 ft at 6 seconds and SE 2 ft at 10 seconds.

MON NIGHT
SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 5 seconds and SE 2 ft at 9 seconds.

TUE
S winds around 10 kt. Seas 2 to 4 ft.

TUE NIGHT
S winds 5 to 10 kt. Seas 2 to 4 ft. A chance of rain.

WED
SW winds 10 to 15 kt. Seas 2 to 3 ft.

WED NIGHT
W 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.

ANZ256-031000
Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island
404 PM EST Fri Jan 2 2026

SMALL CRAFT ADVISORY IN EFFECT THROUGH SATURDAY AFTERNOON

TONIGHT
NW winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: W 5 ft at 6 seconds and E 1 foot at 12 seconds.

SAT
W winds 15 to 20 kt, diminishing to 10 to 15 kt in the afternoon. Seas 2 to 4 ft. Wave Detail: NW 4 ft at 5 seconds and S 2 ft at 9 seconds.

SAT NIGHT
NW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: NW 3 ft at 6 seconds and SE 2 ft at 11 seconds. A chance of snow after midnight.

SUN
N winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: NW 3 ft at 5 seconds and E 1 foot at 10 seconds. A chance of snow in the morning.

SUN NIGHT
NW winds 20 to 25 kt. Seas 3 to 5 ft. Wave Detail: NW 4 ft at 5 seconds and SE 1 foot at 10 seconds.

MON AND MON NIGHT
SW winds 15 to 20 kt. Seas 2 to 4 ft. Wave Detail: NW 4 ft at 5 seconds and S 2 ft at 9 seconds.

TUE
S winds 10 to 15 kt. Seas 2 to 4 ft.

TUE NIGHT AND WED
SW winds 5 to 10 kt, becoming W 10 to 15 kt. Seas 3 to 4 ft. A chance of rain.

WED NIGHT
NW 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.

ANZ232-031000
Nantucket Sound
404 PM EST Fri Jan 2 2026

TONIGHT
W winds 15 to 20 kt. Seas 2 to 3 ft. Wave Detail: W 3 ft at 4 seconds and E 1 foot at 12 seconds. Light freezing spray after midnight.

SAT
W winds 15 to 20 kt, diminishing to 10 to 15 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: W 3 ft at 4 seconds and SE 1 foot at 11 seconds. Light freezing spray in the morning.

SAT NIGHT
NW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: W 2 ft at 4 seconds and SE 1 foot at 11 seconds. A chance of snow after midnight.

SUN
NW winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Seas around 2 ft. Wave Detail: NW 2 ft at 3 seconds and E 1 foot at 10 seconds. A chance of snow in the morning.

SUN NIGHT AND MON
W winds 15 to 20 kt. Seas 2 to 3 ft. Wave Detail: NW 3 ft at 4 seconds and E 1 foot at 10 seconds.

MON NIGHT
SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: W 1 foot at 3 seconds and E 1 foot at 8 seconds.

TUE
S winds 5 to 10 kt. Seas around 2 ft.

TUE NIGHT AND WED
S winds 5 to 10 kt, becoming SW. Seas around 2 ft. A chance of rain.

WED 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.

ANZ233-031000
Vineyard Sound
404 PM EST Fri Jan 2 2026

TONIGHT
W winds 15 to 20 kt. Seas 2 to 3 ft. Wave Detail: W 3 ft at 6 seconds and E 1 foot at 12 seconds. Light freezing spray after midnight.

SAT
W winds 10 to 15 kt. Gusts up to 20 kt in the morning. Seas 2 to 3 ft. Wave Detail: W 3 ft at 5 seconds and S 1 foot at 11 seconds.

SAT NIGHT
NW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: W 2 ft at 5 seconds and SE 1 foot at 10 seconds. A chance of snow after midnight.

SUN
N winds 5 to 10 kt, becoming NW 10 to 15 kt in the afternoon. Seas around 2 ft. Wave Detail: NW 1 foot at 6 seconds and E 1 foot at 10 seconds. A chance of snow in the morning.

SUN NIGHT AND MON
W winds 15 to 20 kt. Seas 2 to 3 ft. Wave Detail: NW 2 ft at 4 seconds and SE 1 foot at 9 seconds.

MON NIGHT
SW winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft after midnight. Wave Detail: W 1 foot at 5 seconds and S 1 foot at 8 seconds, becoming SW 1 foot at 3 seconds and S 1 foot at 8 seconds.

TUE
S winds 5 to 10 kt. Seas 2 to 3 ft.

TUE NIGHT AND WED
S winds 5 to 10 kt, becoming SW. Seas 2 to 3 ft. A chance of rain.

WED NIGHT
W winds 5 to 10 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.

ANZ234-031000
Buzzards Bay
404 PM EST Fri Jan 2 2026

TONIGHT
W winds 15 to 20 kt. Seas around 2 ft. Wave Detail: W 2 ft at 6 seconds and E 1 foot at 12 seconds.

SAT
W winds 10 to 15 kt. Gusts up to 20 kt in the morning. Seas around 2 ft. Wave Detail: W 2 ft at 5 seconds and SE 1 foot at 11 seconds.

SAT NIGHT
NW winds 5 to 10 kt. Seas around 2 ft in the evening, then 1 foot or less. Wave Detail: W 2 ft at 5 seconds and SE 1 foot at 10 seconds, becoming SW 1 foot at 5 seconds and E 1 foot at 10 seconds. A chance of snow after midnight.

SUN
NW winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: NW 1 foot at 5 seconds and E 1 foot at 10 seconds. A chance of snow in the morning.

SUN NIGHT AND MON
W winds 15 to 20 kt. Seas around 2 ft. Wave Detail: NW 2 ft at 3 seconds and SE 1 foot at 9 seconds.

MON NIGHT
SW winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: SW 1 foot at 5 seconds and S 1 foot at 8 seconds.

TUE
S winds 5 to 10 kt. Seas around 2 ft.

TUE NIGHT AND WED
S winds 5 to 10 kt, becoming SW. Seas around 2 ft. A chance of rain.

WED 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.

ANZ235-031000
Rhode Island Sound
404 PM EST Fri Jan 2 2026

TONIGHT
W winds 15 to 20 kt. Seas 2 to 4 ft. Wave Detail: W 4 ft at 6 seconds and E 1 foot at 12 seconds. Light freezing spray after midnight.

SAT
W winds 15 to 20 kt, diminishing to 10 to 15 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: W 3 ft at 5 seconds and S 1 foot at 10 seconds.

SAT NIGHT
NW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: W 2 ft at 7 seconds and S 1 foot at 11 seconds. A chance of snow after midnight.

SUN
N winds 5 to 10 kt, becoming NW 10 to 15 kt in the afternoon. Seas around 2 ft. Wave Detail: NW 2 ft at 7 seconds and SE 1 foot at 11 seconds. A chance of snow in the morning.

SUN NIGHT AND MON
W winds 15 to 20 kt. Seas 2 to 3 ft. Wave Detail: NW 3 ft at 4 seconds and S 1 foot at 8 seconds.

MON NIGHT
SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds and S 1 foot at 9 seconds.

TUE
S winds 5 to 10 kt. Seas 2 to 3 ft.

TUE NIGHT AND WED
S winds 5 to 10 kt, becoming SW. Seas 2 to 3 ft. A chance of rain.

WED NIGHT
NW winds around 10 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.

ANZ237-031000
Block Island Sound
404 PM EST Fri Jan 2 2026

TONIGHT
W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: W 3 ft at 5 seconds and E 1 foot at 12 seconds.

SAT
W winds 10 to 15 kt. Gusts up to 20 kt in the morning. Seas 2 to 3 ft. Wave Detail: W 2 ft at 4 seconds and S 1 foot at 10 seconds.

SAT NIGHT
NW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: W 2 ft at 5 seconds and S 1 foot at 9 seconds. A chance of snow after midnight.

SUN
N winds 5 to 10 kt, becoming NW 10 to 15 kt in the afternoon. Seas around 2 ft. Wave Detail: NW 2 ft at 4 seconds and SE 1 foot at 10 seconds. A chance of snow in the morning.

SUN NIGHT AND MON
W winds 15 to 20 kt. Seas 2 to 3 ft. Wave Detail: NW 3 ft at 4 seconds and S 1 foot at 9 seconds.

MON NIGHT
SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: W 1 foot at 2 seconds and S 1 foot at 8 seconds.

TUE
SW winds 5 to 10 kt. Seas 2 to 3 ft.

TUE NIGHT AND WED
SW winds 5 to 10 kt, becoming W. Seas 2 to 3 ft. A chance of rain.

WED NIGHT
NW winds 5 to 10 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.

ANZ230-031000
Boston Harbor
404 PM EST Fri Jan 2 2026

TONIGHT
W winds 10 to 15 kt, increasing to 15 to 20 kt after midnight. Waves around 2 ft.

SAT
W winds 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft.

SAT NIGHT
W winds 5 to 10 kt. Waves 1 foot or less. A chance of snow after midnight.

SUN
NW winds 5 to 10 kt. Waves 1 foot or less. A chance of snow in the morning.

SUN NIGHT
NW winds 15 to 20 kt. Waves around 2 ft.

MON AND MON NIGHT
SW winds 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft.

TUE
S winds around 5 kt. Waves 1 foot or less.

TUE NIGHT AND WED
SW winds around 5 kt, becoming W. Waves 1 foot or less. A chance of rain.

WED NIGHT
W winds around 10 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.

ANZ236-031000
Narragansett Bay
404 PM EST Fri Jan 2 2026

TONIGHT
W winds 10 to 15 kt. Waves around 2 ft.

SAT
W winds 5 to 10 kt. Waves around 2 ft.

SAT NIGHT
W winds 5 to 10 kt, becoming NW after midnight. Waves around 2 ft in the evening, then 1 foot or less. A chance of snow after midnight.

SUN
NW winds 5 to 10 kt. Waves 1 foot or less. A chance of snow in the morning.

SUN NIGHT AND MON
W winds 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft.

MON NIGHT
SW winds around 5 kt. Waves 1 foot or less.

TUE
S winds 5 to 10 kt. Waves around 2 ft.

TUE NIGHT AND WED
SW winds 5 to 10 kt. Waves around 2 ft. A chance of rain.

WED NIGHT
W winds 5 to 10 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.

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