fzus51 kbox 171403
cwfbox
expires:202609180300;;603554

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
1003 am edt thu sep 17 2026

coastal waters from the merrimack river ma to watch hill ri out
to 60 nm


anz231-180300-
cape cod bay-
1003 am edt thu sep 17 2026

.this afternoon...s winds 5 to 10 kt. seas 1 foot or less, then
around 2 ft. wave detail: e 1 foot at 7 seconds, becoming s
1 foot at 2 seconds and e 1 foot at 8 seconds. 
.tonight...sw winds around 10 kt. gusts up to 20 kt after
midnight. seas around 2 ft. wave detail: s 1 foot at 2 seconds
and e 1 foot at 8 seconds. showers likely after midnight. 
.fri...nw winds around 10 kt, becoming n in the afternoon. gusts
up to 20 kt. seas around 2 ft. wave detail: w 1 foot at 3 seconds
and e 1 foot at 8 seconds. patchy fog in the morning. a chance of
showers in the morning. 
.fri night...n winds 10 to 15 kt, increasing to 15 to 20 kt after
midnight. gusts up to 25 kt. seas 2 to 4 ft. wave detail: n 3 ft
at 5 seconds. 
.sat...ne winds 10 to 15 kt with gusts up to 20 kt, diminishing
to 5 to 10 kt in the afternoon. seas 2 to 3 ft. wave detail: n
2 ft at 5 seconds. 
.sat night...se winds around 5 kt. seas around 2 ft. wave detail:
n 2 ft at 6 seconds. 
.sun and sun night...se winds 5 to 10 kt, becoming n 15 to 20 kt.
gusts up to 25 kt. seas 2 to 3 ft. showers likely. 
.mon...n winds 15 to 20 kt with gusts up to 25 kt. seas 2 to
4 ft. a chance of showers. 
.mon night...ne 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 171403
cwfbox
expires:202609180300;;603558

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
1003 am edt thu sep 17 2026

coastal waters from the merrimack river ma to watch hill ri out
to 60 nm


anz232-180300-
nantucket sound-
1003 am edt thu sep 17 2026

.this afternoon...sw winds around 10 kt. seas around 2 ft. wave
detail: sw 1 foot at 2 seconds and e 1 foot at 8 seconds. 
.tonight...sw winds 10 to 15 kt. gusts up to 20 kt after
midnight. seas 2 to 3 ft. wave detail: sw 2 ft at 3 seconds and e
1 foot at 7 seconds. showers likely after midnight. 
.fri...w winds 10 to 15 kt, becoming n in the afternoon. gusts up
to 20 kt. seas 2 to 3 ft. wave detail: w 2 ft at 3 seconds and e
1 foot at 7 seconds. patchy fog in the morning. a chance of
showers in the morning. 
.fri night...n winds 10 to 15 kt, increasing to 15 to 20 kt after
midnight. seas 2 to 3 ft. wave detail: ne 3 ft at 4 seconds and w
1 foot at 5 seconds. 
.sat...ne winds 10 to 15 kt with gusts up to 20 kt, diminishing
to 5 to 10 kt in the afternoon. seas 2 to 3 ft. wave detail: ne
3 ft at 4 seconds and w 1 foot at 5 seconds. 
.sat night...e winds 5 to 10 kt. seas around 2 ft. wave detail:
se 1 foot at 3 seconds and ne 1 foot at 7 seconds. 
.sun and sun night...se winds 10 to 15 kt, increasing to 15 to
20 kt. seas 2 to 3 ft. showers likely. 
.mon...ne winds 15 to 20 kt with gusts up to 25 kt. seas around
3 ft. a chance of showers. 
.mon night...ne winds 20 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 171403
cwfbox
expires:202609180300;;603559

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
1003 am edt thu sep 17 2026

coastal waters from the merrimack river ma to watch hill ri out
to 60 nm


anz233-180300-
vineyard sound-
1003 am edt thu sep 17 2026

.this afternoon...sw winds 5 to 10 kt. seas 1 foot or less, then
around 2 ft. wave detail: sw 1 foot at 4 seconds and se 1 foot at
9 seconds, becoming sw 1 foot at 4 seconds and se 1 foot at
10 seconds. 
.tonight...sw winds 10 to 15 kt. gusts up to 20 kt after
midnight. seas 2 to 3 ft. wave detail: sw 2 ft at 4 seconds and
se 1 foot at 9 seconds. a chance of showers after midnight. 
.fri...w winds 10 to 15 kt with gusts up to 20 kt, becoming n
5 to 10 kt in the afternoon. seas 2 to 3 ft. wave detail: sw 2 ft
at 5 seconds and se 1 foot at 12 seconds. patchy fog in the
morning. a chance of showers in the morning. 
.fri night...n winds 10 to 15 kt. gusts up to 20 kt after
midnight. seas around 2 ft. wave detail: ne 2 ft at 3 seconds and
w 1 foot at 5 seconds. 
.sat...ne winds 10 to 15 kt with gusts up to 20 kt, diminishing
to 5 to 10 kt in the afternoon. seas around 2 ft. wave detail: ne
2 ft at 4 seconds and sw 1 foot at 5 seconds. 
.sat night...se winds 5 to 10 kt. seas 1 foot or less. wave
detail: se 1 foot at 2 seconds and e 1 foot at 6 seconds. 
.sun and sun night...se winds 10 to 15 kt, becoming e 15 to
20 kt. seas 2 to 3 ft. showers.
.mon...ne winds 15 to 20 kt with gusts up to 25 kt. seas 3 to
4 ft. a chance of showers. 
.mon night...ne 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 171403
cwfbox
expires:202609180300;;603560

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
1003 am edt thu sep 17 2026

coastal waters from the merrimack river ma to watch hill ri out
to 60 nm


anz234-180300-
buzzards bay-
1003 am edt thu sep 17 2026

.this afternoon...sw winds 5 to 10 kt. seas 1 foot or less, then
around 2 ft. wave detail: sw 1 foot at 4 seconds and se 1 foot at
10 seconds, becoming sw 1 foot at 3 seconds and se 1 foot at
11 seconds. 
.tonight...sw winds 10 to 15 kt. gusts up to 20 kt after
midnight. seas around 2 ft. wave detail: sw 2 ft at 4 seconds and
se 1 foot at 10 seconds. a chance of showers after midnight. 
.fri...nw winds 5 to 10 kt with gusts up to 20 kt, becoming n in
the afternoon. seas around 2 ft. wave detail: sw 2 ft at
5 seconds and se 1 foot at 10 seconds. patchy fog in the morning.
a chance of showers in the morning. 
.fri night...n winds 10 to 15 kt. gusts up to 20 kt after
midnight. seas around 2 ft. wave detail: n 1 foot at 2 seconds
and w 1 foot at 5 seconds. 
.sat...ne winds 10 to 15 kt, diminishing to 5 to 10 kt in the
afternoon. seas around 2 ft in the morning, then 1 foot or less.
wave detail: ne 1 foot at 3 seconds and sw 1 foot at 5 seconds,
becoming ne 1 foot at 3 seconds and w 1 foot at 5 seconds. 
.sat night...se winds 5 to 10 kt. seas 1 foot or less. wave
detail: e 1 foot at 2 seconds. 
.sun and sun night...se winds 10 to 15 kt, becoming e 15 to
20 kt. seas 2 to 3 ft. showers.
.mon...ne winds 15 to 20 kt with gusts up to 25 kt. seas 3 to
4 ft. a chance of showers. 
.mon night...ne 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 171403
cwfbox
expires:202609180300;;603561

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
1003 am edt thu sep 17 2026

coastal waters from the merrimack river ma to watch hill ri out
to 60 nm


anz235-180300-
rhode island sound-
1003 am edt thu sep 17 2026

.this afternoon...sw winds around 10 kt. seas around 2 ft. wave
detail: sw 1 foot at 4 seconds and se 1 foot at 9 seconds. 
.tonight...sw winds 10 to 15 kt. gusts up to 20 kt after
midnight. seas 2 to 3 ft. wave detail: sw 3 ft at 4 seconds and
se 1 foot at 9 seconds. a chance of showers after midnight. 
.fri...nw winds 10 to 15 kt with gusts up to 20 kt, becoming n
5 to 10 kt in the afternoon. seas 2 to 3 ft. wave detail: sw 3 ft
at 5 seconds and se 1 foot at 10 seconds. a chance of showers in
the morning. 
.fri night...n 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 w
2 ft at 5 seconds. 
.sat...ne winds 10 to 15 kt with gusts up to 20 kt, becoming e
5 to 10 kt in the afternoon. seas 2 to 3 ft. wave detail: ne 3 ft
at 5 seconds and sw 1 foot at 5 seconds. 
.sat night...se winds 5 to 10 kt. seas around 2 ft. wave detail:
e 2 ft at 8 seconds and se 1 foot at 3 seconds. 
.sun and sun night...se winds 10 to 15 kt, increasing to 15 to
20 kt. seas 2 to 4 ft. showers.
.mon...ne winds 15 to 20 kt with gusts up to 25 kt. seas 3 to
4 ft. a chance of showers. 
.mon night...ne 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 171403
cwfbox
expires:202609180300;;603564

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
1003 am edt thu sep 17 2026

coastal waters from the merrimack river ma to watch hill ri out
to 60 nm


anz236-180300-
narragansett bay-
1003 am edt thu sep 17 2026

.this afternoon...s winds 5 to 10 kt. waves 1 foot or less, then
around 2 ft. 
.tonight...sw winds 5 to 10 kt. gusts up to 20 kt after midnight.
waves around 2 ft. a chance of showers after midnight. 
.fri...n winds 5 to 10 kt. waves around 2 ft. a chance of showers
in the morning. 
.fri night...n winds 5 to 10 kt, increasing to 10 to 15 kt after
midnight. waves around 2 ft. 
.sat...ne winds 5 to 10 kt, becoming e in the afternoon. waves
around 2 ft. 
.sat night...se winds around 5 kt. waves 1 foot or less. 
.sun and sun night...se winds 10 to 15 kt, becoming ne. gusts up
to 20 kt. waves 2 to 3 ft. showers.
.mon...ne winds 15 to 20 kt with gusts up to 25 kt. waves 2 to
3 ft. a chance of showers. 
.mon night...ne winds 10 to 15 kt with gusts up to 20 kt. waves
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.

$$

fzus51 kbox 171403
cwfbox
expires:202609180300;;603552

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
1003 am edt thu sep 17 2026

coastal waters from the merrimack river ma to watch hill ri out
to 60 nm


anz250-180300-
coastal waters east of ipswich bay and the stellwagen bank
national marine sanctuary-
1003 am edt thu sep 17 2026

.this afternoon...s winds 5 to 10 kt. seas around 2 ft. wave
detail: e 2 ft at 8 seconds and sw 1 foot at 2 seconds. patchy
fog with vsby 1 nm or less. 
.tonight...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 8 seconds.
patchy fog. a chance of showers in the evening, then showers
likely after midnight. vsby 1 to 3 nm. 
.fri...nw winds 5 to 10 kt. gusts up to 20 kt in the morning.
seas 2 to 3 ft. wave detail: w 2 ft at 4 seconds and e 2 ft at
8 seconds. patchy fog in the morning with vsby 1 to 3 nm. 
.fri night...n winds 10 to 15 kt, increasing to 15 to 20 kt after
midnight. gusts up to 25 kt. seas 2 to 4 ft. wave detail: n 4 ft
at 6 seconds. 
.sat...n winds 10 to 15 kt with gusts up to 20 kt, becoming ne
5 to 10 kt in the afternoon. seas 2 to 4 ft. wave detail: nw 4 ft
at 6 seconds. 
.sat night...se winds around 5 kt, becoming s after midnight.
seas 2 to 3 ft. wave detail: ne 3 ft at 7 seconds and nw 1 foot
at 4 seconds. 
.sun and sun night...se winds 10 to 15 kt, becoming ne. gusts up
to 20 kt. seas 2 to 3 ft. showers likely. 
.mon and mon night...n winds 15 to 20 kt, becoming ne 10 to
15 kt. gusts up to 25 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 171403
cwfbox
expires:202609180300;;603555

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
1003 am edt thu sep 17 2026

coastal waters from the merrimack river ma to watch hill ri out
to 60 nm


anz254-180300-
coastal waters from provincetown ma to chatham ma to nantucket ma
out 20 nm-
1003 am edt thu sep 17 2026

.this afternoon...s winds 5 to 10 kt. seas 2 to 3 ft. wave
detail: e 2 ft at 8 seconds and sw 1 foot at 3 seconds. 
.tonight...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 e 2 ft at 7 seconds. a
chance of showers after midnight. 
.fri...w winds 10 to 15 kt, becoming n in the afternoon. gusts up
to 20 kt. seas 2 to 3 ft. wave detail: w 2 ft at 4 seconds and e
2 ft at 8 seconds. patchy fog in the morning. a chance of showers
in the morning. 
.fri night...n winds 10 to 15 kt, increasing to 15 to 20 kt after
midnight. gusts up to 25 kt. seas 2 to 4 ft. wave detail: n 4 ft
at 5 seconds. 
.sat...ne winds 10 to 15 kt with gusts up to 20 kt, diminishing
to 5 to 10 kt in the afternoon. seas 3 to 5 ft. wave detail: ne
4 ft at 6 seconds and w 1 foot at 5 seconds. 
.sat night...e winds around 5 kt. seas 2 to 4 ft. wave detail: n
3 ft at 6 seconds. 
.sun...se winds 10 to 15 kt. seas 2 to 3 ft. a chance of showers.
.sun night...se winds 10 to 15 kt with gusts up to 20 kt. seas
2 to 4 ft. showers likely. 
.mon...n winds 15 to 20 kt with gusts up to 25 kt. seas 3 to
5 ft. a chance of showers. 
.mon night...ne winds 15 to 20 kt with 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 171403
cwfbox
expires:202609180300;;603556

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
1003 am edt thu sep 17 2026

coastal waters from the merrimack river ma to watch hill ri out
to 60 nm


anz255-180300-
coastal waters extending out to 25 nm south of marthas vineyard
and nantucket-
1003 am edt thu sep 17 2026

.this afternoon...s winds 5 to 10 kt. seas around 2 ft. wave
detail: e 2 ft at 8 seconds and w 1 foot at 4 seconds. 
.tonight...sw winds 10 to 15 kt. gusts up to 20 kt after
midnight. seas 2 to 3 ft. wave detail: sw 3 ft at 4 seconds and e
2 ft at 8 seconds. a chance of showers after midnight. 
.fri...w winds 10 to 15 kt, becoming n in the afternoon. gusts up
to 20 kt. seas 2 to 4 ft. wave detail: sw 3 ft at 5 seconds and e
2 ft at 8 seconds. patchy fog in the morning. a chance of showers
in the morning. 
.fri night...n winds 10 to 15 kt, increasing to 15 to 20 kt after
midnight. seas 2 to 4 ft. wave detail: n 3 ft at 5 seconds and sw
2 ft at 5 seconds. 
.sat...ne winds 15 to 20 kt, diminishing to 10 to 15 kt in the
afternoon. seas 2 to 4 ft. wave detail: ne 3 ft at 5 seconds and
sw 1 foot at 5 seconds. 
.sat night...e winds 5 to 10 kt. seas 2 to 3 ft. wave detail: ne
2 ft at 7 seconds and nw 1 foot at 4 seconds. 
.sun...se winds 10 to 15 kt with gusts up to 20 kt. seas 2 to
3 ft. a chance of showers. 
.sun night...se winds 15 to 20 kt. seas 3 to 5 ft. showers
likely. 
.mon...ne winds 20 to 25 kt. seas 3 to 5 ft. a chance of showers.
.mon night...ne winds 20 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.

$$