fzus51 kbox 211404
cwfbox
expires:202603220300;;060118

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
1004 am edt sat mar 21 2026

coastal waters from the merrimack river ma to watch hill ri out
to 25 nm


anz231-220300-
cape cod bay-
1004 am edt sat mar 21 2026

.this afternoon...w winds around 10 kt, becoming n. gusts up to
25 kt. seas 2 to 3 ft. wave detail: se 2 ft at 8 seconds and w
1 foot at 3 seconds. patchy fog. 
.tonight...n winds 5 to 10 kt, becoming e after midnight. seas
around 2 ft. wave detail: nw 1 foot at 4 seconds and e 1 foot at
7 seconds. 
.sun...s winds 10 to 15 kt with gusts up to 20 kt. seas 2 to
3 ft. wave detail: s 2 ft at 3 seconds and ne 1 foot at
6 seconds. a chance of rain. patchy fog in the afternoon with
vsby 1 to 3 nm. 
.sun night...w winds 10 to 15 kt, becoming n with gusts up to
20 kt after midnight. seas 2 to 3 ft. wave detail: sw 2 ft at
3 seconds and e 2 ft at 6 seconds. rain. patchy fog in the
evening with vsby 1 nm or less. 
.mon...n winds 15 to 20 kt with gusts up to 25 kt. seas 2 to
4 ft. wave detail: n 4 ft at 5 seconds. rain with a chance of
snow in the morning, then a chance of rain in the afternoon. 
.mon night...n winds 15 to 20 kt with gusts up to 25 kt. seas
3 to 5 ft. wave detail: n 4 ft at 6 seconds. 
.tue...n winds 10 to 15 kt with gusts up to 20 kt. seas 3 to
5 ft. 
.tue night through wed night...w 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.

$$

fzus51 kbox 211404
cwfbox
expires:202603220300;;060122

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
1004 am edt sat mar 21 2026

coastal waters from the merrimack river ma to watch hill ri out
to 25 nm


anz232-220300-
nantucket sound-
1004 am edt sat mar 21 2026

.this afternoon...w winds around 10 kt, becoming n. gusts up to
25 kt. seas 2 to 4 ft. wave detail: w 2 ft at 5 seconds and e
1 foot at 8 seconds. patchy fog. 
.tonight...ne winds 5 to 10 kt, becoming se after midnight. seas
2 to 3 ft. wave detail: w 2 ft at 6 seconds and ne 1 foot at
8 seconds. 
.sun...s winds 10 to 15 kt, increasing to 15 to 20 kt in the
afternoon. gusts up to 25 kt. seas 2 to 3 ft. wave detail: s 3 ft
at 4 seconds and se 1 foot at 8 seconds. patchy fog in the
afternoon. a chance of rain in the afternoon. 
.sun night...sw winds 10 to 15 kt, becoming n with gusts up to
20 kt after midnight. seas 2 to 3 ft. wave detail: sw 3 ft at
5 seconds and e 1 foot at 8 seconds. rain. patchy fog in the
evening with vsby 1 nm or less. 
.mon...n winds 15 to 20 kt with gusts up to 25 kt. seas 2 to
4 ft. wave detail: ne 3 ft at 5 seconds and sw 2 ft at 7 seconds.
rain, mainly in the morning. 
.mon night...n winds 15 to 20 kt. seas 2 to 4 ft. wave detail: n
3 ft at 5 seconds. 
.tue through wed night...w winds 15 to 20 kt with gusts up to
25 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.

$$

fzus51 kbox 211404
cwfbox
expires:202603220300;;060123

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
1004 am edt sat mar 21 2026

coastal waters from the merrimack river ma to watch hill ri out
to 25 nm


anz233-220300-
vineyard sound-
1004 am edt sat mar 21 2026

.this afternoon...w winds around 10 kt, becoming nw. gusts up to
20 kt. seas 2 to 4 ft. wave detail: sw 4 ft at 8 seconds and se
2 ft at 8 seconds. 
.tonight...ne winds 5 to 10 kt, becoming se after midnight. seas
2 to 3 ft. wave detail: sw 2 ft at 7 seconds and se 2 ft at
8 seconds. 
.sun...s winds 10 to 15 kt, increasing to 15 to 20 kt in the
afternoon. seas 2 to 3 ft. wave detail: sw 3 ft at 5 seconds and
se 1 foot at 8 seconds. patchy fog in the afternoon. a chance of
rain in the afternoon with vsby 1 to 3 nm. 
.sun night...w winds 10 to 15 kt, becoming n with gusts up to
20 kt after midnight. seas 2 to 3 ft. wave detail: s 3 ft at
7 seconds. rain. patchy fog in the evening with vsby 1 nm or
less. 
.mon...n winds 15 to 20 kt with gusts up to 25 kt. seas 2 to
4 ft. wave detail: ne 3 ft at 4 seconds and sw 2 ft at 7 seconds.
rain, mainly in the morning. 
.mon night...n winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. seas 2 to 3 ft. wave detail: ne 2 ft at 5 seconds
and nw 2 ft at 6 seconds. 
.tue through wed night...nw winds 15 to 20 kt with gusts up to
25 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.

$$

fzus51 kbox 211404
cwfbox
expires:202603220300;;060124

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
1004 am edt sat mar 21 2026

coastal waters from the merrimack river ma to watch hill ri out
to 25 nm


anz234-220300-
buzzards bay-
1004 am edt sat mar 21 2026

.this afternoon...w winds 5 to 10 kt, becoming nw. gusts up to
20 kt. seas 2 to 3 ft. wave detail: sw 3 ft at 8 seconds and se
2 ft at 8 seconds. 
.tonight...ne winds 5 to 10 kt, becoming se after midnight. seas
around 2 ft. wave detail: sw 2 ft at 7 seconds and e 1 foot at
7 seconds. 
.sun...s winds 10 to 15 kt, becoming sw 15 to 20 kt in the
afternoon. seas 2 to 3 ft. wave detail: sw 3 ft at 4 seconds and
se 1 foot at 8 seconds. patchy fog in the afternoon. a chance of
rain in the afternoon with vsby 1 to 3 nm. 
.sun night...sw winds 10 to 15 kt, becoming n with gusts up to
20 kt after midnight. seas around 2 ft. wave detail: sw 2 ft at
6 seconds and se 2 ft at 8 seconds. rain. areas of fog in the
evening with vsby 1 nm or less. 
.mon...n winds 15 to 20 kt with gusts up to 25 kt. seas 2 to
4 ft. wave detail: ne 2 ft at 3 seconds and sw 2 ft at 7 seconds.
rain, mainly in the morning. 
.mon night...n winds 10 to 15 kt. gusts up to 20 kt in the
evening. seas 2 to 3 ft. wave detail: n 2 ft at 5 seconds. 
.tue...nw winds 10 to 15 kt. seas around 2 ft. 
.tue night through wed night...w winds 15 to 20 kt with gusts up
to 25 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.

$$

fzus51 kbox 211404
cwfbox
expires:202603220300;;060125

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
1004 am edt sat mar 21 2026

coastal waters from the merrimack river ma to watch hill ri out
to 25 nm


anz235-220300-
rhode island sound-
1004 am edt sat mar 21 2026

.this afternoon...w winds around 10 kt, becoming nw. gusts up to
20 kt. seas 3 to 5 ft. wave detail: s 5 ft at 8 seconds. 
.tonight...ne winds 5 to 10 kt, becoming se after midnight. seas
2 to 4 ft. wave detail: s 4 ft at 7 seconds and se 3 ft at
8 seconds. 
.sun...s winds 10 to 15 kt, becoming sw 15 to 20 kt in the
afternoon. seas 2 to 4 ft. wave detail: s 4 ft at 7 seconds.
patchy fog. a chance of rain in the afternoon with vsby 1 to
3 nm. 
.sun night...w winds 10 to 15 kt, becoming n after midnight.
gusts up to 20 kt. seas 3 to 4 ft. wave detail: s 4 ft at
7 seconds. rain. patchy fog in the evening with vsby 1 nm or
less. 
.mon...n winds 15 to 20 kt with gusts up to 25 kt. seas 3 to
5 ft. wave detail: ne 5 ft at 7 seconds and sw 3 ft at 7 seconds.
rain, mainly in the morning. 
.mon night...n winds 15 to 20 kt. seas 2 to 4 ft. wave detail: n
4 ft at 6 seconds. 
.tue through wed night...w winds 15 to 20 kt with gusts up to
25 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.

$$

fzus51 kbox 211404
cwfbox
expires:202603220300;;060128

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
1004 am edt sat mar 21 2026

coastal waters from the merrimack river ma to watch hill ri out
to 25 nm


anz236-220300-
narragansett bay-
1004 am edt sat mar 21 2026

.this afternoon...nw winds 5 to 10 kt with gusts up to 20 kt.
waves 2 to 3 ft. 
.tonight...n winds 5 to 10 kt, becoming se after midnight. waves
2 to 3 ft. 
.sun...s winds 10 to 15 kt with gusts up to 20 kt. waves 2 to
3 ft. patchy fog in the afternoon. a chance of rain in the
afternoon with vsby 1 to 3 nm. 
.sun night...w winds 5 to 10 kt, becoming n 10 to 15 kt with
gusts up to 20 kt after midnight. waves 2 to 3 ft. rain. patchy
fog in the evening with vsby 1 nm or less. 
.mon...n winds around 15 kt with gusts up to 20 kt. waves 2 to
3 ft. a chance of snow. rain in the morning, then a chance of
rain in the afternoon. 
.mon night...n winds 10 to 15 kt. gusts up to 20 kt in the
evening. waves 2 to 3 ft. 
.tue through wed night...w winds 10 to 15 kt with gusts up to
20 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.

$$

fzus51 kbox 211404
cwfbox
expires:202603220300;;060116

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
1004 am edt sat mar 21 2026

coastal waters from the merrimack river ma to watch hill ri out
to 25 nm


anz250-220300-
coastal waters east of ipswich bay and the stellwagen bank
national marine sanctuary-
1004 am edt sat mar 21 2026

...small craft advisory in effect until 8 pm edt this evening...

.this afternoon...nw winds 10 to 15 kt with gusts up to 25 kt.
seas 3 to 5 ft. wave detail: se 4 ft at 8 seconds and nw 2 ft at
3 seconds. 
.tonight...n winds around 10 kt, becoming ne after midnight. seas
2 to 4 ft. wave detail: e 3 ft at 8 seconds and nw 2 ft at
4 seconds. 
.sun...s winds 10 to 15 kt, increasing to 15 to 20 kt in the
afternoon. gusts up to 25 kt. seas 2 to 4 ft. wave detail: s 4 ft
at 5 seconds and se 3 ft at 8 seconds. patchy fog. a chance of
rain and snow in the morning. rain likely in the afternoon. vsby
1 to 3 nm. 
.sun night...w winds 10 to 15 kt, becoming n 15 to 20 kt after
midnight. gusts up to 25 kt. seas 3 to 5 ft. wave detail: e 5 ft
at 8 seconds and sw 3 ft at 4 seconds. rain likely. patchy fog in
the evening with vsby 1 nm or less. 
.mon...n winds around 20 kt with gusts up to 25 kt. seas 5 to
7 ft. wave detail: n 7 ft at 6 seconds. a chance of snow. rain
likely in the morning. 
.mon night...n winds 15 to 20 kt with gusts up to 25 kt. seas
6 to 7 ft. wave detail: ne 7 ft at 8 seconds. 
.tue...n winds 15 to 20 kt. seas 5 to 7 ft. 
.tue night and wed...sw winds 20 to 25 kt. seas 3 to 5 ft. 
.wed night...nw winds 20 to 25 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.

$$

fzus51 kbox 211404
cwfbox
expires:202603220300;;060119

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
1004 am edt sat mar 21 2026

coastal waters from the merrimack river ma to watch hill ri out
to 25 nm


anz254-220300-
coastal waters from provincetown ma to chatham ma to nantucket ma
out 20 nm-
1004 am edt sat mar 21 2026

...small craft advisory in effect until 8 pm edt this evening...

.this afternoon...w winds 10 to 15 kt, becoming nw 15 to 20 kt.
gusts up to 30 kt. seas 3 to 5 ft. wave detail: sw 4 ft at
7 seconds and se 4 ft at 8 seconds. patchy fog. 
.tonight...n winds 5 to 10 kt with gusts up to 20 kt, becoming e
after midnight. seas 2 to 4 ft. wave detail: nw 3 ft at 6 seconds
and se 3 ft at 8 seconds. 
.sun...s winds 10 to 15 kt, increasing to 15 to 20 kt in the
afternoon. gusts up to 25 kt. seas 2 to 4 ft. wave detail: s 4 ft
at 6 seconds. patchy fog in the afternoon. a chance of rain in
the afternoon with vsby 1 to 3 nm. 
.sun night...sw winds 10 to 15 kt, becoming n after midnight.
gusts up to 20 kt. seas 3 to 5 ft. wave detail: s 4 ft at
7 seconds. rain. patchy fog in the evening with vsby 1 nm or
less. 
.mon...n winds 15 to 20 kt, increasing to 20 to 25 kt in the
afternoon. seas 5 to 7 ft. wave detail: n 7 ft at 6 seconds.
rain, mainly in the morning. 
.mon night...n winds 20 to 25 kt, diminishing to 15 to 20 kt
after midnight. seas 5 to 8 ft. wave detail: ne 8 ft at 8 seconds
and nw 1 foot at 5 seconds. 
.tue...n winds 15 to 20 kt. seas 5 to 7 ft. 
.tue night...sw winds 15 to 20 kt with gusts up to 25 kt. seas
4 to 6 ft. 
.wed and wed night...sw winds 15 to 20 kt, becoming w. gusts up
to 25 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.

$$

fzus51 kbox 211404
cwfbox
expires:202603220300;;060120

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
1004 am edt sat mar 21 2026

coastal waters from the merrimack river ma to watch hill ri out
to 25 nm


anz255-220300-
coastal waters extending out to 25 nm south of marthas vineyard
and nantucket-
1004 am edt sat mar 21 2026

...small craft advisory in effect until 8 pm edt this evening...

.this afternoon...w winds 10 to 15 kt, becoming nw. gusts up to
25 kt. seas 5 to 7 ft. wave detail: sw 6 ft at 8 seconds and e
3 ft at 8 seconds. patchy fog. 
.tonight...ne winds 5 to 10 kt with gusts up to 20 kt, becoming
se after midnight. seas 3 to 5 ft. wave detail: sw 4 ft at
7 seconds and se 3 ft at 8 seconds. 
.sun...s winds 15 to 20 kt with gusts up to 25 kt. seas 3 to
5 ft. wave detail: s 5 ft at 7 seconds. patchy fog in the
afternoon with vsby 1 to 3 nm. 
.sun night...sw winds 10 to 15 kt, becoming nw after midnight.
gusts up to 20 kt. seas 4 to 5 ft. wave detail: s 5 ft at
7 seconds and se 2 ft at 8 seconds. rain likely. patchy fog in
the evening with vsby 1 nm or less. 
.mon...n winds 15 to 20 kt, increasing to 20 to 25 kt in the
afternoon. seas 4 to 6 ft. wave detail: ne 6 ft at 7 seconds and
w 5 ft at 7 seconds. rain likely, mainly in the morning. 
.mon night...n winds 20 to 25 kt, diminishing to 15 to 20 kt
after midnight. seas 4 to 6 ft. wave detail: ne 6 ft at 8 seconds
and nw 4 ft at 4 seconds. 
.tue...n winds 15 to 20 kt. seas 3 to 5 ft. 
.tue night through wed night...nw winds 20 to 25 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.

$$