fzus51 kbox 172003
cwfbox
expires:202609180900;;618693

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

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


anz231-180900-
cape cod bay-
403 pm edt thu sep 17 2026

.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. a slight chance of tstms. a chance of
showers this evening, then showers likely after midnight. patchy
fog after midnight. 
.fri...nw winds around 10 kt, becoming n in the afternoon. gusts
up to 20 kt. seas 2 to 3 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 with vsby 1 to 3 nm. 
.fri night...n winds 10 to 15 kt with 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...se winds 5 to 10 kt. seas around 2 ft. wave detail: n 2 ft
at 6 seconds and se 1 foot at 4 seconds. a chance of showers in
the afternoon. 
.sun night...se winds 5 to 10 kt, becoming e after midnight. seas
around 2 ft. showers likely. 
.mon...ne winds 10 to 15 kt with gusts up to 25 kt. seas 2 to
4 ft. a chance of showers. 
.mon night and tue...ne winds 15 to 20 kt with gusts up to 25 kt.
seas 2 to 4 ft. 
.tue night...ne winds 20 to 25 kt with gusts up to 30 kt. seas
3 to 5 ft.  

winds and seas higher in and near tstms.

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 172003
cwfbox
expires:202609180900;;618697

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

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


anz232-180900-
nantucket sound-
403 pm edt thu sep 17 2026

.tonight...sw winds 10 to 15 kt with gusts up to 20 kt. seas 2 to
3 ft. wave detail: sw 2 ft at 3 seconds and e 1 foot at
7 seconds. a slight chance of showers this evening, then showers
likely with a slight chance of tstms after midnight. patchy fog
after midnight. 
.fri...nw 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. 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. gusts up to 20 kt in the morning.
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...se winds 5 to 10 kt. seas around 2 ft. wave detail: se
2 ft at 3 seconds and e 1 foot at 7 seconds. a chance of showers
in the afternoon. 
.sun night...se winds 10 to 15 kt. seas 2 to 3 ft. showers
likely. 
.mon through tue...ne winds 20 to 25 kt with gusts up to 30 kt.
seas 2 to 4 ft. a chance of showers. 
.tue night...ne winds 25 to 30 kt with gusts up to 35 kt. seas
3 to 4 ft.  

winds and seas higher in and near tstms.

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 172003
cwfbox
expires:202609180900;;618698

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

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


anz233-180900-
vineyard sound-
403 pm edt thu sep 17 2026

.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 slight chance of showers this evening,
then a chance of showers with a slight chance of tstms after
midnight. patchy fog 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 around 2 ft. wave detail: sw
2 ft at 5 seconds and se 1 foot at 12 seconds. a chance of
showers in the morning. 
.fri night...n winds 10 to 15 kt with gusts up to 20 kt. seas
2 to 3 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...se winds 5 to 10 kt. seas around 2 ft. wave detail: s 2 ft
at 3 seconds and se 1 foot at 11 seconds. a chance of showers in
the afternoon. 
.sun night...e winds 10 to 15 kt. seas 2 to 4 ft. showers likely.
.mon and mon night...ne winds 15 to 20 kt with gusts up to 25 kt.
seas 2 to 4 ft. a chance of showers. 
.tue...ne winds 20 to 25 kt with gusts up to 30 kt. seas 3 to
5 ft. a chance of showers. 
.tue night...ne winds 20 to 25 kt with gusts up to 30 kt. seas
3 to 5 ft.  

winds and seas higher in and near tstms.

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 172003
cwfbox
expires:202609180900;;618699

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

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


anz234-180900-
buzzards bay-
403 pm edt thu sep 17 2026

.tonight...sw winds 10 to 15 kt with gusts up to 20 kt. seas 2 to
3 ft. wave detail: sw 2 ft at 4 seconds and se 1 foot at
10 seconds. a slight chance of showers this evening, then a
chance of showers with a slight chance of tstms after midnight. 
.fri...nw winds 5 to 10 kt, becoming n in the afternoon. gusts up
to 20 kt. seas around 2 ft. wave detail: sw 2 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 with gusts up to 20 kt. 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 with gusts up to 20 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...se winds 5 to 10 kt. seas 1 foot or less, then around 2 ft
in the afternoon. wave detail: se 1 foot at 2 seconds and e
1 foot at 10 seconds, becoming s 2 ft at 3 seconds and e 1 foot
at 10 seconds. showers likely in the afternoon. 
.sun night...se winds around 10 kt, becoming e after midnight.
seas 2 to 3 ft. showers likely. 
.mon and mon night...ne winds 15 to 20 kt with gusts up to 25 kt.
seas 2 to 4 ft. a chance of showers. 
.tue...ne winds 15 to 20 kt with gusts up to 30 kt. seas 3 to
5 ft. a chance of showers. 
.tue night...ne winds 20 to 25 kt with gusts up to 30 kt. seas
3 to 4 ft.  

winds and seas higher in and near tstms.

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 172003
cwfbox
expires:202609180900;;618700

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

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


anz235-180900-
rhode island sound-
403 pm edt thu sep 17 2026

.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 slight chance of showers this evening,
then a chance of showers with a slight chance of tstms 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 with gusts up to 20 kt. 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...se winds 10 to 15 kt. seas 2 to 3 ft. wave detail: se 3 ft
at 4 seconds and se 1 foot at 11 seconds. showers likely in the
afternoon. 
.sun night...se winds 10 to 15 kt, becoming e with gusts up to
20 kt after midnight. seas 3 to 5 ft. showers likely. 
.mon and mon night...ne winds 15 to 20 kt with gusts up to 25 kt.
seas 2 to 4 ft. a chance of showers. 
.tue...ne winds 20 to 25 kt with gusts up to 30 kt. seas 3 to
5 ft. a chance of showers. 
.tue night...ne winds 25 to 30 kt. seas 3 to 5 ft.  

winds and seas higher in and near tstms.

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 172003
cwfbox
expires:202609180900;;618703

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

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


anz236-180900-
narragansett bay-
403 pm edt thu sep 17 2026

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

winds and waves higher in and near tstms.

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 172003
cwfbox
expires:202609180900;;618691

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

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


anz250-180900-
coastal waters east of ipswich bay and the stellwagen bank
national marine sanctuary-
403 pm edt thu sep 17 2026

.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. a
slight chance of tstms. a chance of showers this evening, then
showers likely after midnight. patchy fog after midnight with
vsby 1 to 3 nm. 
.fri...nw winds 5 to 10 kt with 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 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...ne winds 10 to 15 kt with gusts up to 20 kt, diminishing
to 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...se winds 5 to 10 kt. seas around 2 ft. wave detail: s 2 ft
at 3 seconds and e 2 ft at 8 seconds. a chance of showers in the
afternoon. 
.sun night...se winds 5 to 10 kt, becoming e after midnight. seas
2 to 3 ft. showers likely. 
.mon...ne winds 10 to 15 kt with gusts up to 20 kt. seas 3 to
5 ft. a chance of showers. 
.mon night and tue...ne winds 15 to 20 kt with gusts up to 25 kt.
seas 3 to 4 ft. 
.tue night...ne winds 15 to 20 kt with gusts up to 30 kt. seas
4 to 6 ft.  

winds and seas higher in and near tstms.

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 172003
cwfbox
expires:202609180900;;618694

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

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


anz254-180900-
coastal waters from provincetown ma to chatham ma to nantucket ma
out 20 nm-
403 pm edt thu sep 17 2026

.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
slight chance of showers this evening, then a chance of showers
with a slight chance of tstms after midnight. patchy fog 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 4 ft. wave detail: ne
4 ft at 6 seconds and w 1 foot at 5 seconds. 
.sat night and sun...se winds 5 to 10 kt. seas 2 to 3 ft. wave
detail: ne 3 ft at 7 seconds and se 2 ft at 3 seconds. 
.sun night...e winds 5 to 10 kt. seas 2 to 4 ft. wave detail: e
3 ft at 6 seconds and sw 3 ft at 7 seconds. showers likely. 
.mon through tue...ne winds 15 to 20 kt with gusts up to 25 kt.
seas 3 to 5 ft. a chance of showers. 
.tue night...ne winds 25 to 30 kt. seas 5 to 7 ft.  

winds and seas higher in and near tstms.

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 172003
cwfbox
expires:202609180900;;618695

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

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


anz255-180900-
coastal waters extending out to 25 nm south of marthas vineyard
and nantucket-
403 pm edt thu sep 17 2026

.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 with a slight chance of
tstms 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: sw 3 ft at 5 seconds and e
2 ft at 8 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 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 around 10 kt. seas 2 to 3 ft. wave detail: se
2 ft at 4 seconds and e 2 ft at 8 seconds. a chance of showers in
the afternoon. 
.sun night...se winds 10 to 15 kt. seas 4 to 6 ft. showers
likely. 
.mon...ne winds 15 to 20 kt with gusts up to 25 kt. seas 3 to
5 ft. showers likely. 
.mon night and tue...ne winds 20 to 25 kt with gusts up to 30 kt.
seas 3 to 5 ft. a chance of showers. 
.tue night...ne winds 25 to 30 kt with gusts up to 35 kt. seas
4 to 6 ft.  

winds and seas higher in and near tstms.

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.

$$