fzus51 kbox 182004
cwfbox
expires:202603190900;;916348

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
404 pm edt wed mar 18 2026

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


anz231-190900-
cape cod bay-
404 pm edt wed mar 18 2026

.tonight...se winds around 5 kt. seas 2 to 3 ft. wave detail: nw
2 ft at 5 seconds and e 2 ft at 8 seconds. 
.thu...se winds 5 to 10 kt. seas around 2 ft. wave detail: e 2 ft
at 6 seconds and n 1 foot at 4 seconds. 
.thu night...s winds 5 to 10 kt. seas around 2 ft. wave detail:
se 2 ft at 9 seconds and se 1 foot at 2 seconds. 
.fri...sw winds 5 to 10 kt. seas around 2 ft. wave detail: se
2 ft at 8 seconds and sw 1 foot at 2 seconds. 
.fri night and sat...sw 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 e 2 ft at
9 seconds. a chance of rain. 
.sat night...sw winds 10 to 15 kt with gusts up to 20 kt. seas
2 to 3 ft. wave detail: e 2 ft at 9 seconds and sw 1 foot at
3 seconds. 
.sun...sw winds 15 to 20 kt. seas 2 to 3 ft. a chance of rain. 
.sun night...nw winds 20 to 25 kt. seas 2 to 4 ft. a chance of
rain and snow. 
.mon and mon night...n winds 20 to 25 kt, diminishing to 15 to
20 kt. seas 3 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 182004
cwfbox
expires:202603190900;;916352

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
404 pm edt wed mar 18 2026

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


anz232-190900-
nantucket sound-
404 pm edt wed mar 18 2026

.tonight...se winds around 5 kt. seas 2 to 3 ft. wave detail: se
2 ft at 10 seconds and nw 1 foot at 4 seconds. 
.thu...se winds 5 to 10 kt. seas around 2 ft. wave detail: se
2 ft at 9 seconds and nw 1 foot at 3 seconds. 
.thu night...s winds around 5 kt. seas around 2 ft. wave detail:
se 1 foot at 3 seconds and se 1 foot at 9 seconds. 
.fri...sw winds 5 to 10 kt. seas around 2 ft. wave detail: sw
1 foot at 2 seconds and se 1 foot at 9 seconds. 
.fri night and sat...sw winds 15 to 20 kt. seas 2 to 4 ft. wave
detail: s 3 ft at 4 seconds and e 2 ft at 9 seconds. a chance of
rain. 
.sat night...sw winds 10 to 15 kt. gusts up to 20 kt after
midnight. seas 2 to 4 ft. wave detail: sw 2 ft at 4 seconds and e
1 foot at 9 seconds. 
.sun...sw winds 10 to 15 kt with gusts up to 20 kt. seas around
2 ft. a chance of rain. 
.sun night...nw winds 20 to 25 kt. seas 2 to 3 ft. a chance of
rain and snow. 
.mon...n winds 20 to 25 kt. seas 3 to 4 ft. a chance of snow. 
.mon night...n 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 182004
cwfbox
expires:202603190900;;916353

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
404 pm edt wed mar 18 2026

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


anz233-190900-
vineyard sound-
404 pm edt wed mar 18 2026

.tonight...se winds around 5 kt. seas 2 to 3 ft. wave detail: s
2 ft at 9 seconds and sw 1 foot at 4 seconds. 
.thu...se winds 5 to 10 kt. seas 2 to 3 ft. wave detail: s 2 ft
at 9 seconds. 
.thu night...s winds 5 to 10 kt. seas around 2 ft. wave detail: s
2 ft at 8 seconds and s 1 foot at 2 seconds. 
.fri...sw winds 5 to 10 kt. seas around 2 ft. wave detail: se
2 ft at 8 seconds and sw 1 foot at 3 seconds. 
.fri night and sat...sw winds 15 to 20 kt. seas 2 to 4 ft. wave
detail: s 4 ft at 7 seconds. a chance of rain. 
.sat night...sw winds 10 to 15 kt, increasing to 15 to 20 kt
after midnight. seas 2 to 4 ft. wave detail: s 3 ft at 7 seconds.
.sun...sw winds 15 to 20 kt. seas 2 to 3 ft. a chance of rain. 
.sun night...nw winds 20 to 25 kt. seas 2 to 3 ft. a chance of
rain and snow. 
.mon...n winds 20 to 25 kt. seas 2 to 3 ft. a chance of snow. 
.mon night...n 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 182004
cwfbox
expires:202603190900;;916354

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
404 pm edt wed mar 18 2026

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


anz234-190900-
buzzards bay-
404 pm edt wed mar 18 2026

.tonight...s winds 5 to 10 kt. seas around 2 ft. wave detail: s
2 ft at 9 seconds and sw 1 foot at 4 seconds. 
.thu...se winds 5 to 10 kt. seas around 2 ft. wave detail: s 2 ft
at 9 seconds. 
.thu night...s winds 5 to 10 kt. seas around 2 ft. wave detail: s
2 ft at 8 seconds and s 1 foot at 2 seconds. 
.fri...sw winds 5 to 10 kt, increasing to 10 to 15 kt in the
afternoon. seas around 2 ft. wave detail: sw 1 foot at 2 seconds
and se 1 foot at 8 seconds. 
.fri night and sat...sw winds 15 to 20 kt. seas 2 to 3 ft. wave
detail: sw 3 ft at 5 seconds and se 1 foot at 8 seconds. a chance
of rain. 
.sat night...sw winds 10 to 15 kt. gusts up to 20 kt after
midnight. seas 2 to 3 ft. wave detail: sw 3 ft at 6 seconds and
se 1 foot at 9 seconds. 
.sun...sw winds 15 to 20 kt. seas 2 to 3 ft. a chance of rain. 
.sun night...nw winds 20 to 25 kt. seas 2 to 3 ft. a chance of
rain and snow. 
.mon and mon night...n winds 20 to 25 kt, diminishing to 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 182004
cwfbox
expires:202603190900;;916355

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
404 pm edt wed mar 18 2026

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


anz235-190900-
rhode island sound-
404 pm edt wed mar 18 2026

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

.tonight...se winds 5 to 10 kt. seas 3 to 5 ft. wave detail: s
5 ft at 10 seconds. 
.thu...se winds 5 to 10 kt. seas 2 to 4 ft. wave detail: s 4 ft
at 9 seconds. 
.thu night...s winds 5 to 10 kt, becoming sw after midnight. seas
2 to 3 ft. wave detail: se 3 ft at 9 seconds. 
.fri...sw winds 5 to 10 kt, increasing to 10 to 15 kt in the
afternoon. seas 2 to 3 ft. wave detail: se 3 ft at 8 seconds and
sw 2 ft at 3 seconds. 
.fri night...s winds 10 to 15 kt. gusts up to 20 kt after
midnight. seas 2 to 3 ft. wave detail: s 3 ft at 5 seconds and se
2 ft at 8 seconds. rain likely after midnight. 
.sat...sw winds 15 to 20 kt. seas 3 to 5 ft. wave detail: s 5 ft
at 6 seconds and se 2 ft at 9 seconds. a chance of rain in the
morning. 
.sat night...sw winds 15 to 20 kt. seas 3 to 5 ft, subsiding to
2 to 3 ft after midnight. 
.sun...sw winds 15 to 20 kt. seas 2 to 3 ft. 
.sun night...nw winds 20 to 25 kt. seas around 3 ft. a chance of
rain and snow. 
.mon...n winds 20 to 25 kt. seas 3 to 4 ft. a chance of snow. 
.mon night...n 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 182004
cwfbox
expires:202603190900;;916358

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
404 pm edt wed mar 18 2026

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


anz236-190900-
narragansett bay-
404 pm edt wed mar 18 2026

.tonight...s winds 5 to 10 kt, becoming se after midnight. waves
2 to 3 ft. 
.thu...se winds around 5 kt, becoming s in the afternoon. waves
2 to 3 ft. 
.thu night...s winds 5 to 10 kt. waves around 2 ft.
.fri...sw winds 5 to 10 kt. waves around 2 ft. 
.fri night and sat...sw winds 10 to 15 kt with gusts up to 20 kt.
waves 2 to 3 ft. a chance of rain in the evening, then rain
likely through the day. 
.sat night...sw winds 10 to 15 kt. waves 2 to 3 ft. 
.sun...sw winds 10 to 15 kt with gusts up to 20 kt. waves 2 to
3 ft. a chance of rain. 
.sun night...nw winds 15 to 20 kt. waves 2 to 3 ft. a chance of
rain and snow. 
.mon and mon night...n winds 15 to 20 kt, diminishing to 10 to
15 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 182004
cwfbox
expires:202603190900;;916346

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
404 pm edt wed mar 18 2026

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


anz250-190900-
coastal waters east of ipswich bay and the stellwagen bank
national marine sanctuary-
404 pm edt wed mar 18 2026

...small craft advisory in effect through thursday afternoon...

.tonight...s winds 5 to 10 kt. seas 3 to 5 ft. wave detail: se
5 ft at 10 seconds and nw 2 ft at 4 seconds. 
.thu...se winds 5 to 10 kt, increasing to 10 to 15 kt in the
afternoon. seas 3 to 4 ft. wave detail: se 4 ft at 10 seconds and
s 2 ft at 3 seconds. 
.thu night...s winds 10 to 15 kt. seas 2 to 4 ft. wave detail: se
3 ft at 9 seconds and s 2 ft at 3 seconds. 
.fri...sw winds 5 to 10 kt. seas 2 to 4 ft. wave detail: se 3 ft
at 8 seconds and sw 2 ft at 3 seconds. 
.fri night...s winds 10 to 15 kt with gusts up to 20 kt. seas
3 to 5 ft. wave detail: e 4 ft at 9 seconds and s 3 ft at
4 seconds. rain likely after midnight. 
.sat...s winds 15 to 20 kt with gusts up to 25 kt. seas 3 to
5 ft. wave detail: s 4 ft at 4 seconds and e 4 ft at 9 seconds. a
chance of rain. 
.sat night...sw winds 15 to 20 kt with gusts up to 25 kt. seas
3 to 5 ft. 
.sun and sun night...sw winds 15 to 20 kt, becoming nw 20 to
25 kt. gusts up to 30 kt. seas 3 to 5 ft. a chance of rain. 
.mon and mon night...n winds 20 to 25 kt with gusts up to 30 kt.
seas 4 to 6 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 182004
cwfbox
expires:202603190900;;916349

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
404 pm edt wed mar 18 2026

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


anz254-190900-
coastal waters from provincetown ma to chatham ma to nantucket ma
out 20 nm-
404 pm edt wed mar 18 2026

...small craft advisory in effect through thursday afternoon...

.tonight...se winds around 5 kt. seas 4 to 6 ft. wave detail: se
5 ft at 10 seconds and nw 2 ft at 6 seconds. 
.thu...se winds around 5 kt. seas 3 to 5 ft. wave detail: se 4 ft
at 9 seconds and n 1 foot at 5 seconds. 
.thu night...s winds 5 to 10 kt. seas 2 to 4 ft. wave detail: se
4 ft at 9 seconds and n 1 foot at 4 seconds. 
.fri...sw winds 5 to 10 kt. seas 2 to 4 ft. wave detail: se 3 ft
at 8 seconds and sw 1 foot at 3 seconds. 
.fri night and sat...s winds 15 to 20 kt. seas 3 to 5 ft. wave
detail: s 4 ft at 5 seconds and e 4 ft at 9 seconds. a chance of
rain. 
.sat night...sw winds 15 to 20 kt. seas 3 to 5 ft. wave detail:
sw 3 ft at 6 seconds and e 3 ft at 8 seconds. 
.sun...sw winds 15 to 20 kt with gusts up to 25 kt. seas 3 to
4 ft. a chance of rain. 
.sun night...nw winds 20 to 25 kt with gusts up to 30 kt. seas
4 to 6 ft. a chance of rain. 
.mon and mon night...n winds 20 to 25 kt with gusts up to 30 kt.
seas 5 to 6 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 182004
cwfbox
expires:202603190900;;916350

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
404 pm edt wed mar 18 2026

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


anz255-190900-
coastal waters extending out to 25 nm south of marthas vineyard
and nantucket-
404 pm edt wed mar 18 2026

...small craft advisory in effect through thursday afternoon...

.tonight...se winds around 5 kt. seas 3 to 5 ft. wave detail: s
5 ft at 10 seconds and w 1 foot at 6 seconds. 
.thu...se winds 5 to 10 kt. seas 3 to 4 ft. wave detail: se 4 ft
at 9 seconds. 
.thu night...s winds around 5 kt. seas 2 to 3 ft. wave detail: se
3 ft at 9 seconds. 
.fri...sw winds 5 to 10 kt. seas 2 to 3 ft. wave detail: se 3 ft
at 8 seconds and sw 1 foot at 2 seconds. 
.fri night...s winds 10 to 15 kt. gusts up to 20 kt after
midnight. seas 3 to 4 ft. wave detail: sw 4 ft at 5 seconds and e
4 ft at 9 seconds. a chance of rain after midnight. 
.sat...s winds 15 to 20 kt with gusts up to 25 kt. seas 4 to
6 ft. wave detail: s 5 ft at 6 seconds and e 4 ft at 9 seconds. a
chance of rain. 
.sat night...sw winds 15 to 20 kt. seas 3 to 5 ft. 
.sun...sw winds 15 to 20 kt with gusts up to 25 kt. seas 3 to
4 ft. 
.sun night...nw winds 20 to 25 kt with gusts up to 30 kt. seas
3 to 5 ft. a chance of rain and snow. 
.mon...n winds 20 to 25 kt with gusts up to 30 kt. seas 4 to
6 ft. a chance of rain. 
.mon night...n winds 20 to 25 kt. seas 4 to 6 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.

$$