822
FZUS51 KBOX 121405
CWFBOX

Coastal Waters Forecast for Massachusetts and Rhode Island
National Weather Service Boston/Norton MA
1004 AM EDT Wed Mar 12 2025

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

ANZ200-130300-
1004 AM EDT Wed Mar 12 2025

.Synopsis for Massachusetts and Rhode Island coastal waters...
High pres builds across srn Quebec today, then a weak low pres along
a warm front will track S of the waters late tonight into tomorrow.
Weak high pres builds over the waters Fri, then increasing S flow
develops Sat ahead of strong low pres moving into the Great Lakes. A
cold front will move E from the Gt Lakes Sun, crossing New Eng and
the waters late Sun night into Mon.

$$

ANZ250-130300-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
1004 AM EDT Wed Mar 12 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM THURSDAY MORNING THROUGH
THURSDAY EVENING...

.THIS AFTERNOON...N winds 15 to 20 kt, becoming NE 10 to 15 kt.
Gusts up to 25 kt. Seas 3 to 4 ft. Wave Detail: N 3 ft at
4 seconds and SE 2 ft at 9 seconds.
.TONIGHT...E winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: N
3 ft at 4 seconds and SE 3 ft at 9 seconds.
.THU...E winds around 10 kt with gusts up to 20 kt. Seas 3 to
5 ft. Wave Detail: SE 4 ft at 9 seconds and NE 2 ft at 5 seconds.
.THU NIGHT...E winds 5 to 10 kt. Gusts up to 20 kt in the
evening. Seas 3 to 5 ft. Wave Detail: E 4 ft at 9 seconds and E
1 foot at 4 seconds.
.FRI...E winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: E 4 ft at
10 seconds.
.FRI NIGHT...SE winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: E
4 ft at 10 seconds.
.SAT...S winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to
4 ft.
.SAT NIGHT...S winds 15 to 20 kt with gusts up to 25 kt. Seas
3 to 5 ft. A chance of rain.
.SUN...S winds 20 to 25 kt with gusts up to 30 kt. Seas 5 to
7 ft. A chance of rain.
.SUN NIGHT...S winds 20 to 25 kt with gusts up to 35 kt. Seas
6 to 9 ft. 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.

$$

ANZ251-130300-
Massachusetts Bay and Ipswich Bay-
1004 AM EDT Wed Mar 12 2025

.THIS AFTERNOON...NE winds 10 to 15 kt. Gusts up to 20 kt. Seas
2 to 3 ft. Wave Detail: N 2 ft at 4 seconds and S 1 foot at
8 seconds.
.TONIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: NE
2 ft at 5 seconds and SE 2 ft at 9 seconds.
.THU...E winds around 10 kt with gusts up to 20 kt. Seas 2 to
3 ft. Wave Detail: E 3 ft at 9 seconds and E 2 ft at 5 seconds.
.THU NIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E
3 ft at 9 seconds and E 2 ft at 4 seconds.
.FRI...E winds 5 to 10 kt. Seas around 3 ft. Wave Detail: E 3 ft
at 10 seconds.
.FRI NIGHT...SE winds 5 to 10 kt. Seas around 3 ft. Wave Detail:
E 3 ft at 10 seconds.
.SAT...S winds 10 to 15 kt. Seas 2 to 3 ft.
.SAT NIGHT...S winds 15 to 20 kt with gusts up to 25 kt. Seas
3 to 4 ft. A chance of rain.
.SUN...S winds 20 to 25 kt with gusts up to 30 kt. Seas 4 to
6 ft. A chance of rain.
.SUN NIGHT...S winds 20 to 25 kt with gusts up to 30 kt. Seas
5 to 7 ft. 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.

$$

ANZ231-130300-
Cape Cod Bay-
1004 AM EDT Wed Mar 12 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 PM EDT THIS AFTERNOON...

.THIS AFTERNOON...NE winds 10 to 15 kt with gusts up to 25 kt.
Seas 2 to 3 ft. Wave Detail: N 2 ft at 3 seconds and SE 2 ft at
9 seconds.
.TONIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: N
2 ft at 4 seconds and SE 2 ft at 9 seconds.
.THU...E winds around 10 kt with gusts up to 20 kt. Seas around
2 ft. Wave Detail: SE 2 ft at 9 seconds and NE 1 foot at
4 seconds.
.THU NIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E
3 ft at 9 seconds and E 1 foot at 3 seconds.
.FRI...NE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft
at 10 seconds and E 1 foot at 2 seconds.
.FRI NIGHT...SE winds around 5 kt. Seas around 2 ft. Wave Detail:
E 2 ft at 10 seconds and E 1 foot at 3 seconds.
.SAT...S winds 5 to 10 kt. Seas around 2 ft.
.SAT NIGHT...S winds 15 to 20 kt with gusts up to 25 kt. Seas
2 to 4 ft.
.SUN...S winds 20 to 25 kt with gusts up to 30 kt. Seas 3 to
5 ft. A chance of rain.
.SUN NIGHT...S winds 20 to 25 kt with gusts up to 30 kt. Seas
4 to 6 ft. Rain likely. Vsby 1 to 3 NM.

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.

$$

ANZ254-130300-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
1004 AM EDT Wed Mar 12 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH THURSDAY EVENING...

.THIS AFTERNOON...N winds 15 to 20 kt with gusts up to 25 kt.
Seas 4 to 5 ft. Wave Detail: SE 4 ft at 9 seconds and N 3 ft at
4 seconds.
.TONIGHT...NE winds 5 to 10 kt. Seas 4 to 5 ft. Wave Detail: SE
4 ft at 9 seconds and N 3 ft at 6 seconds.
.THU...E winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to
5 ft. Wave Detail: SE 4 ft at 9 seconds and S 4 ft at 9 seconds.
.THU NIGHT...E winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas 4 to 5 ft. Wave Detail: SE 5 ft at 9 seconds and NE
2 ft at 5 seconds.
.FRI...NE winds 5 to 10 kt. Seas 4 to 5 ft. Wave Detail: E 5 ft
at 10 seconds.
.FRI NIGHT...E winds around 5 kt. Seas 3 to 5 ft. Wave Detail: E
5 ft at 10 seconds.
.SAT AND SAT NIGHT...S winds 5 to 10 kt, increasing to 15 to
20 kt with gusts up to 25 kt. Seas 3 to 5 ft.
.SUN...S winds 20 to 25 kt with gusts up to 30 kt. Seas 5 to
7 ft.
.SUN NIGHT...S winds 20 to 25 kt with gusts up to 30 kt. Seas
7 to 10 ft. Rain likely. Vsby 1 to 3 NM.

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.

$$

ANZ255-130300-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
1004 AM EDT Wed Mar 12 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH THURSDAY EVENING...

.THIS AFTERNOON...NE winds 15 to 20 kt with gusts up to 25 kt.
Seas 4 to 5 ft. Wave Detail: S 4 ft at 9 seconds and N 3 ft at
4 seconds.
.TONIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. Wave Detail: SE
5 ft at 9 seconds and SE 4 ft at 9 seconds.
.THU...E winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to
5 ft. Wave Detail: SE 4 ft at 9 seconds and NE 2 ft at 6 seconds.
.THU NIGHT...NE winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas 3 to 5 ft. Wave Detail: SE 4 ft at 9 seconds and NE
2 ft at 5 seconds.
.FRI...NE winds 5 to 10 kt. Seas 3 to 5 ft. Wave Detail: SE 4 ft
at 9 seconds and NE 1 foot at 3 seconds.
.FRI NIGHT...E winds 5 to 10 kt, becoming SE after midnight. Seas
2 to 4 ft. Wave Detail: E 4 ft at 9 seconds and SE 1 foot at
7 seconds.
.SAT...S winds 10 to 15 kt. Seas 2 to 4 ft.
.SAT NIGHT...S winds 15 to 20 kt with gusts up to 25 kt. Seas
3 to 5 ft.
.SUN...S winds 25 to 30 kt. Seas 6 to 9 ft.
.SUN NIGHT...S winds 25 to 30 kt with gusts up to 35 kt. Seas
8 to 11 ft. A chance of rain. Vsby 1 to 3 NM.

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.

$$

ANZ256-130300-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
1004 AM EDT Wed Mar 12 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH THURSDAY EVENING...

.THIS AFTERNOON...NE winds 15 to 20 kt, diminishing to 10 to
15 kt. Gusts up to 25 kt. Seas 4 to 5 ft. Wave Detail: S 5 ft at
9 seconds and N 3 ft at 3 seconds.
.TONIGHT...E winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to
5 ft. Wave Detail: SE 5 ft at 9 seconds and NE 2 ft at 4 seconds.
.THU...E winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to
5 ft. Wave Detail: SE 5 ft at 9 seconds and E 3 ft at 4 seconds.
.THU NIGHT...NE winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas 4 to 5 ft. Wave Detail: SE 5 ft at 9 seconds.
.FRI...NE winds around 10 kt. Seas 3 to 5 ft. Wave Detail: SE
4 ft at 9 seconds and NE 1 foot at 3 seconds.
.FRI NIGHT...E winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: SE
4 ft at 9 seconds and NE 1 foot at 3 seconds.
.SAT...SE winds 10 to 15 kt. Seas 2 to 4 ft.
.SAT NIGHT...S winds 20 to 25 kt. Seas 4 to 6 ft.
.SUN...S winds 25 to 30 kt with gusts up to 35 kt. Seas 6 to
9 ft. A chance of rain.
.SUN NIGHT...S winds 25 to 30 kt with gusts up to 35 kt. Seas
9 to 12 ft. Rain. Vsby 1 to 3 NM.

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.

$$

ANZ232-130300-
Nantucket Sound-
1004 AM EDT Wed Mar 12 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 PM EDT THIS AFTERNOON...

.THIS AFTERNOON...NE winds 10 to 15 kt with gusts up to 25 kt.
Seas 2 to 3 ft. Wave Detail: N 2 ft at 3 seconds and S 2 ft at
9 seconds.
.TONIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: N
2 ft at 4 seconds and SE 2 ft at 9 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 9 seconds.
.THU NIGHT...NE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E
2 ft at 9 seconds and E 1 foot at 4 seconds.
.FRI...NE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 2 ft
at 10 seconds and E 1 foot at 4 seconds.
.FRI NIGHT...E winds around 5 kt. Seas around 2 ft. Wave Detail:
E 2 ft at 10 seconds and NE 1 foot at 3 seconds.
.SAT...S winds 5 to 10 kt. Seas around 2 ft.
.SAT NIGHT...S winds 15 to 20 kt with gusts up to 25 kt. Seas
2 to 4 ft.
.SUN...S winds 20 to 25 kt with gusts up to 30 kt. Seas 4 to
6 ft.
.SUN NIGHT...S winds 25 to 30 kt. Seas 5 to 7 ft. Rain likely.
Vsby 1 to 3 NM.

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.

$$

ANZ233-130300-
Vineyard Sound-
1004 AM EDT Wed Mar 12 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 PM EDT THIS AFTERNOON...

.THIS AFTERNOON...NE winds 10 to 15 kt with gusts up to 25 kt.
Seas 2 to 3 ft. Wave Detail: N 2 ft at 3 seconds and S 2 ft at
9 seconds.
.TONIGHT...E winds around 10 kt. Seas around 2 ft. Wave Detail: S
2 ft at 9 seconds and SE 2 ft at 9 seconds.
.THU...E winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to
3 ft. Wave Detail: SE 3 ft at 9 seconds and S 2 ft at 9 seconds.
.THU NIGHT...NE winds 5 to 10 kt. Seas around 2 ft. Wave Detail:
S 2 ft at 8 seconds and SE 2 ft at 9 seconds.
.FRI...NE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE
2 ft at 9 seconds and NE 1 foot at 3 seconds.
.FRI NIGHT...E winds 5 to 10 kt. Seas around 2 ft. Wave Detail:
SE 2 ft at 10 seconds and NE 1 foot at 2 seconds.
.SAT AND SAT NIGHT...S winds 10 to 15 kt, increasing to 20 to
25 kt. Seas 1 foot or less, then 2 to 4 ft.
.SUN...S winds 25 to 30 kt with gusts up to 35 kt. Seas 4 to
6 ft. A chance of rain.
.SUN NIGHT...S winds 25 to 30 kt with gusts up to 35 kt. Seas
6 to 9 ft. Rain. Vsby 1 to 3 NM.

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.

$$

ANZ234-130300-
Buzzards Bay-
1004 AM EDT Wed Mar 12 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 PM EDT THIS AFTERNOON...

.THIS AFTERNOON...NE winds 10 to 15 kt with gusts up to 20 kt.
Seas around 2 ft. Wave Detail: S 2 ft at 9 seconds and NW 1 foot
at 3 seconds.
.TONIGHT...E winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S
2 ft at 9 seconds and SE 2 ft at 9 seconds.
.THU...E winds around 10 kt with gusts up to 20 kt. Seas around
2 ft. Wave Detail: S 2 ft at 9 seconds and SE 2 ft at 9 seconds.
.THU NIGHT...NE winds 5 to 10 kt. Seas around 2 ft. Wave Detail:
SE 2 ft at 9 seconds and NE 1 foot at 2 seconds.
.FRI...NE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE
2 ft at 9 seconds and NE 1 foot at 2 seconds.
.FRI NIGHT...E winds 5 to 10 kt. Seas 1 foot or less. Wave
Detail: NE 1 foot at 2 seconds and S 1 foot at 7 seconds.
.SAT AND SAT NIGHT...S winds 5 to 10 kt, increasing to 15 to
20 kt with gusts up to 25 kt. Seas 1 foot or less, then 2 to
4 ft.
.SUN...S winds 25 to 30 kt. Seas 4 to 6 ft. A chance of rain.
.SUN NIGHT...S winds 25 to 30 kt with gusts up to 35 kt. Seas
5 to 8 ft. Rain. Vsby 1 to 3 NM.

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.

$$

ANZ235-130300-
Rhode Island Sound-
1004 AM EDT Wed Mar 12 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 PM EDT THIS AFTERNOON...

.THIS AFTERNOON...NE winds 10 to 15 kt with gusts up to 25 kt.
Seas 3 to 4 ft. Wave Detail: S 4 ft at 9 seconds and N 2 ft at
3 seconds.
.TONIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: SE
4 ft at 9 seconds and NE 2 ft at 3 seconds.
.THU...E winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to
4 ft. Wave Detail: SE 4 ft at 9 seconds and E 3 ft at 4 seconds.
.THU NIGHT...NE winds 10 to 15 kt. Gusts up to 20 kt in the
evening. Seas 2 to 4 ft. Wave Detail: SE 4 ft at 9 seconds and NE
1 foot at 3 seconds.
.FRI...NE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 9 seconds and NE 1 foot at 3 seconds.
.FRI NIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE
3 ft at 9 seconds and NE 1 foot at 3 seconds.
.SAT...SE winds 5 to 10 kt. Seas around 2 ft.
.SAT NIGHT...S winds 15 to 20 kt with gusts up to 25 kt. Seas
3 to 5 ft. A chance of rain.
.SUN...S winds 25 to 30 kt with gusts up to 35 kt. Seas 5 to
8 ft. A chance of rain.
.SUN NIGHT...S winds 25 to 30 kt with gusts up to 35 kt. Seas
8 to 11 ft. Rain. Vsby 1 to 3 NM.

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.

$$

ANZ237-130300-
Block Island Sound-
1004 AM EDT Wed Mar 12 2025

.THIS AFTERNOON...NE winds 10 to 15 kt with gusts up to 25 kt,
becoming E. Seas 2 to 4 ft. Wave Detail: S 4 ft at 9 seconds and
N 1 foot at 3 seconds.
.TONIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: SE
4 ft at 9 seconds and E 2 ft at 3 seconds.
.THU...E winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to
4 ft. Wave Detail: SE 4 ft at 9 seconds and E 2 ft at 4 seconds.
.THU NIGHT...NE winds around 10 kt. Gusts up to 20 kt in the
evening. Seas 3 to 4 ft. Wave Detail: SE 4 ft at 9 seconds and E
1 foot at 4 seconds.
.FRI AND FRI NIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave
Detail: SE 3 ft at 9 seconds and NE 1 foot at 3 seconds.
.SAT...SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE
2 ft at 9 seconds and S 1 foot at 4 seconds.
.SAT NIGHT...S winds 15 to 20 kt with gusts up to 25 kt. Seas
3 to 5 ft. A chance of rain.
.SUN...S winds 20 to 25 kt with gusts up to 30 kt. Seas 5 to
8 ft. A chance of rain.
.SUN NIGHT...S winds 20 to 25 kt with gusts up to 35 kt. Seas
7 to 10 ft. Rain. Vsby 1 to 3 NM.

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.

$$

ANZ230-130300-
Boston Harbor-
1004 AM EDT Wed Mar 12 2025

.THIS AFTERNOON...N winds 10 to 15 kt, becoming E 5 to 10 kt.
Waves 1 foot or less.
.TONIGHT...E winds 5 to 10 kt. Waves 1 foot or less.
.THU...E winds 5 to 10 kt. Waves around 2 ft.
.THU NIGHT...E winds 5 to 10 kt. Waves around 2 ft in the
evening, then 1 foot or less.
.FRI...NE winds 5 to 10 kt. Waves 1 foot or less.
.FRI NIGHT...SE winds 5 to 10 kt. Waves 1 foot or less.
.SAT...S winds 5 to 10 kt. Waves around 2 ft.
.SAT NIGHT AND SUN...S winds 15 to 20 kt, increasing to 20 to
25 kt. Gusts up to 30 kt. Waves around 2 ft. At the outer harbor
entrance, waves 2 to 3 ft, building to 3 to 5 ft. A chance of
rain.
.SUN NIGHT...S winds 20 to 25 kt with gusts up to 30 kt. Waves
around 2 ft, except 3 to 5 ft at the outer harbor entrance. 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.

$$

ANZ236-130300-
Narragansett Bay-
1004 AM EDT Wed Mar 12 2025

.THIS AFTERNOON...N winds 10 to 15 kt with gusts up to 20 kt,
becoming NE 5 to 10 kt. Waves 2 to 3 ft.
.TONIGHT...E winds 5 to 10 kt. Waves 2 to 3 ft.
.THU...E winds 5 to 10 kt with gusts up to 20 kt. Waves 2 to
3 ft.
.THU NIGHT...NE winds 5 to 10 kt. Waves 2 to 3 ft.
.FRI AND FRI NIGHT...E winds 5 to 10 kt. Waves 2 to 3 ft.
.SAT...SE winds 5 to 10 kt. Waves around 2 ft.
.SAT NIGHT...S winds 15 to 20 kt with gusts up to 25 kt. Waves
2 to 4 ft. A chance of rain.
.SUN...S winds 20 to 25 kt with gusts up to 30 kt. Waves 5 to
7 ft. A chance of rain.
.SUN NIGHT...S winds 20 to 25 kt with gusts up to 30 kt. Waves
5 to 7 ft. Rain. Vsby 1 to 3 NM.

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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