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National Weather Service Marine Forecast FZUS51 KBOX

FZUS51 KBOX 021806
CWFBOX

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

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

ANZ200-030700
106 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.

ANZ250-030700
Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary
106 PM EST Fri Jan 2 2026

SMALL CRAFT ADVISORY IN EFFECT THROUGH SATURDAY MORNING

THIS AFTERNOON
W winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 4 ft. Wave Detail: W 4 ft at 5 seconds and SW 1 foot at 8 seconds.

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 S 1 foot at 8 seconds.

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 S 1 foot at 8 seconds.

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: N 4 ft at 5 seconds and E 1 foot at 11 seconds. A chance of light freezing spray after midnight.

MON
NW winds 15 to 20 kt. Seas 2 to 4 ft. A chance of light freezing spray.

MON NIGHT
SW winds 5 to 10 kt. Seas 2 to 3 ft. A chance of snow.

TUE
SW winds 5 to 10 kt. Seas around 2 ft. A chance of snow.

TUE NIGHT
S winds 5 to 10 kt. Seas 2 to 3 ft. A chance of rain.

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.

ANZ251-030700
Massachusetts Bay and Ipswich Bay
106 PM EST Fri Jan 2 2026

THIS AFTERNOON
W winds 15 to 20 kt. Seas 2 to 3 ft. Wave Detail: W 3 ft at 4 seconds and N 1 foot at 5 seconds.

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 SW 1 foot at 8 seconds.

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 S 1 foot at 7 seconds.

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: N 1 foot 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. Seas 2 to 3 ft. Wave Detail: N 3 ft at 5 seconds and E 1 foot at 11 seconds. A chance of light freezing spray after midnight.

MON
NW winds 15 to 20 kt. Seas 2 to 3 ft.

MON NIGHT
SW winds 5 to 10 kt. Seas around 2 ft. A chance of snow.

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

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

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.

ANZ231-030700
Cape Cod Bay
106 PM EST Fri Jan 2 2026

THIS AFTERNOON
W winds around 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: NW 3 ft at 5 seconds and SW 2 ft at 8 seconds.

TONIGHT
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 SW 2 ft at 8 seconds.

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: W 3 ft at 4 seconds and SW 1 foot at 7 seconds.

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 S 1 foot at 8 seconds, becoming NW 1 foot at 4 seconds and S 1 foot at 8 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: N 1 foot at 4 seconds and S 1 foot at 8 seconds, becoming N 2 ft at 4 seconds and S 1 foot at 7 seconds. A chance of snow in the morning.

SUN NIGHT
NW winds 10 to 15 kt, increasing to 15 to 20 kt after midnight. Seas 2 to 3 ft. Wave Detail: N 3 ft at 5 seconds and S 1 foot at 7 seconds. A chance of light freezing spray after midnight.

MON
NW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft.

MON NIGHT
SW winds 5 to 10 kt. Seas around 2 ft. A chance of snow.

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

TUE NIGHT
S winds 5 to 10 kt. Seas 1 foot or less. A chance of rain.

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.

ANZ254-030700
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm
106 PM EST Fri Jan 2 2026

SMALL CRAFT ADVISORY IN EFFECT THROUGH SATURDAY MORNING

THIS AFTERNOON
W winds 15 to 20 kt. Seas 3 to 5 ft. Wave Detail: SW 4 ft at 7 seconds and E 1 foot at 12 seconds.

TONIGHT
W winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: W 4 ft at 5 seconds and S 2 ft at 8 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: W 4 ft at 5 seconds and S 1 foot at 8 seconds.

SAT NIGHT
NW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: W 3 ft at 5 seconds and S 1 foot at 8 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: N 3 ft at 5 seconds and S 1 foot at 8 seconds. A chance of snow. Vsby 1 to 3 NM in the morning.

SUN NIGHT
NW winds 15 to 20 kt. Seas 2 to 4 ft. Wave Detail: N 4 ft at 5 seconds and S 1 foot at 7 seconds. A chance of light freezing spray after midnight.

MON
NW winds 15 to 20 kt. Seas 3 to 4 ft. A chance of light freezing spray.

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

TUE AND TUE NIGHT
S 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.

ANZ255-030700
Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket
106 PM EST Fri Jan 2 2026

SMALL CRAFT ADVISORY IN EFFECT THROUGH SATURDAY AFTERNOON

THIS AFTERNOON
W winds around 20 kt with gusts up to 25 kt. Seas 4 to 6 ft. Wave Detail: W 5 ft at 7 seconds and E 1 foot at 12 seconds.

TONIGHT
NW winds 20 to 25 kt. Seas 4 to 6 ft. Wave Detail: W 5 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: SW 5 ft at 7 seconds and E 1 foot at 11 seconds.

SAT NIGHT
NW winds 10 to 15 kt, becoming N around 5 kt after midnight. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 7 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: N 3 ft at 4 seconds and SW 2 ft at 8 seconds. A chance of snow in the morning.

SUN NIGHT
NW 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 S 1 foot at 7 seconds. A chance of light freezing spray after midnight.

MON
NW winds 15 to 20 kt. Seas 2 to 4 ft. A chance of light freezing spray.

MON NIGHT THROUGH TUE NIGHT
S winds 5 to 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.

ANZ256-030700
Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island
106 PM EST Fri Jan 2 2026

SMALL CRAFT ADVISORY IN EFFECT THROUGH SATURDAY AFTERNOON

THIS AFTERNOON
W winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 5 ft. Wave Detail: W 4 ft at 7 seconds and E 1 foot at 12 seconds.

TONIGHT
NW winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: W 4 ft at 7 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 1 foot at 8 seconds.

SAT NIGHT
NW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: NW 2 ft at 5 seconds and S 2 ft at 8 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: N 2 ft at 3 seconds and S 2 ft at 8 seconds. A chance of snow in the morning.

SUN NIGHT
NW winds 15 to 20 kt, increasing to 20 to 25 kt after midnight. Seas 2 to 4 ft. Wave Detail: NW 4 ft at 4 seconds and S 1 foot at 7 seconds. A chance of light freezing spray after midnight.

MON THROUGH TUE NIGHT
S winds 15 to 20 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.

ANZ232-030700
Nantucket Sound
106 PM EST Fri Jan 2 2026

THIS AFTERNOON
W winds 15 to 20 kt. Seas 2 to 3 ft. Wave Detail: W 2 ft at 4 seconds and SW 2 ft at 7 seconds.

TONIGHT
W winds 15 to 20 kt. Seas 2 to 3 ft. Wave Detail: NW 3 ft at 5 seconds and SW 2 ft at 7 seconds.

SAT
W winds 15 to 20 kt, diminishing to 10 to 15 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: NW 2 ft at 4 seconds and SW 1 foot at 7 seconds.

SAT NIGHT
NW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: NW 2 ft at 4 seconds and S 1 foot at 8 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: N 2 ft at 4 seconds and S 1 foot at 7 seconds. A chance of snow in the morning.

SUN NIGHT
NW winds 10 to 15 kt, increasing to 15 to 20 kt after midnight. Seas 2 to 3 ft. Wave Detail: N 2 ft at 4 seconds and S 1 foot at 7 seconds. A chance of light freezing spray after midnight.

MON THROUGH TUE NIGHT
S winds 15 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.

ANZ233-030700
Vineyard Sound
106 PM EST Fri Jan 2 2026

THIS AFTERNOON
W winds 15 to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 6 seconds and E 1 foot at 12 seconds.

TONIGHT
W winds 15 to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 3 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 2 to 3 ft. Wave Detail: W 3 ft at 5 seconds and S 1 foot at 8 seconds.

SAT NIGHT
NW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 6 seconds and E 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: N 1 foot at 4 seconds and S 1 foot at 7 seconds. A chance of snow in the morning.

SUN NIGHT
NW winds 10 to 15 kt, increasing to 15 to 20 kt after midnight. Seas 2 to 3 ft. Wave Detail: N 2 ft at 4 seconds and S 1 foot at 7 seconds.

MON THROUGH TUE NIGHT
S winds 10 to 15 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.

ANZ234-030700
Buzzards Bay
106 PM EST Fri Jan 2 2026

THIS AFTERNOON
W winds around 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 6 seconds and E 1 foot at 12 seconds.

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 S 1 foot at 8 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 4 seconds and S 1 foot at 8 seconds, becoming W 1 foot at 4 seconds and S 1 foot at 8 seconds. A chance of snow after midnight.

SUN
NW winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: N 1 foot at 4 seconds and S 1 foot at 7 seconds. A chance of snow in the morning.

SUN NIGHT
NW winds 10 to 15 kt. Gusts up to 20 kt after midnight. Seas around 2 ft. Wave Detail: N 2 ft at 4 seconds and S 1 foot at 7 seconds.

MON THROUGH TUE NIGHT
S winds 10 to 15 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.

ANZ235-030700
Rhode Island Sound
106 PM EST Fri Jan 2 2026

THIS AFTERNOON
W winds 15 to 20 kt. Seas 3 to 4 ft. Wave Detail: SW 4 ft at 7 seconds and W 2 ft at 4 seconds.

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.

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 8 seconds.

SAT NIGHT
NW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: W 2 ft at 5 seconds and S 2 ft at 8 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 3 seconds and S 2 ft at 8 seconds. A chance of snow in the morning.

SUN NIGHT
NW winds 15 to 20 kt. Seas 2 to 3 ft. Wave Detail: N 3 ft at 4 seconds and S 1 foot at 7 seconds. A chance of light freezing spray after midnight.

MON THROUGH TUE NIGHT
SE 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.

ANZ237-030700
Block Island Sound
106 PM EST Fri Jan 2 2026

THIS AFTERNOON
W winds around 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: W 2 ft at 4 seconds and S 2 ft at 7 seconds.

TONIGHT
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 S 2 ft at 7 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 SW 1 foot at 7 seconds.

SAT NIGHT
NW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: W 1 foot at 3 seconds and S 1 foot at 8 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 3 seconds and S 1 foot at 7 seconds. A chance of snow in the morning.

SUN NIGHT
NW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: NW 2 ft at 3 seconds and S 1 foot at 7 seconds. A chance of light freezing spray after midnight.

MON THROUGH TUE NIGHT
SE 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.

ANZ230-030700
Boston Harbor
106 PM EST Fri Jan 2 2026

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

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 10 to 15 kt. Gusts up to 20 kt after midnight. Waves around 2 ft.

MON
NW winds 10 to 15 kt. Waves around 2 ft.

MON NIGHT
SW winds 5 to 10 kt. Waves 1 foot or less. A chance of snow.

TUE
SW winds 5 to 10 kt. Waves 1 foot or less.

TUE NIGHT
NW winds 5 to 10 kt. Waves 1 foot or less. A chance of rain.

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.

ANZ236-030700
Narragansett Bay
106 PM EST Fri Jan 2 2026

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

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
NW winds 10 to 15 kt. Waves around 2 ft.

MON THROUGH TUE
SW winds 5 to 10 kt. Waves around 2 ft.

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

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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