fzus51 kbox 180803
cwfbox
expires:202609182100;;644809

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
402 am edt fri sep 18 2026

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


anz231-182100-
cape cod bay-
402 am edt fri sep 18 2026

.today...nw winds 5 to 10 kt, becoming n this afternoon. seas
around 2 ft. wave detail: w 1 foot at 3 seconds and e 1 foot at
8 seconds. patchy fog. vsby 1 to 3 nm. 
.tonight...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
3 ft at 5 seconds. 
.sat night...e 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 in the morning, then
1 foot or less. wave detail: ne 2 ft at 6 seconds and se 1 foot
at 3 seconds, becoming se 1 foot at 2 seconds and ne 1 foot at
5 seconds. a chance of showers in the afternoon. 
.sun night...e winds 5 to 10 kt. seas 1 foot or less. wave
detail: se 1 foot at 2 seconds and ne 1 foot at 5 seconds. patchy
fog. showers. vsby 1 to 3 nm. 
.mon and mon night...ne winds 10 to 15 kt, increasing to 15 to
20 kt. gusts up to 30 kt. seas 2 to 4 ft. a chance of showers. 
.tue and tue night...ne winds 20 to 25 kt with gusts up to 30 kt.
seas 3 to 5 ft. a chance of showers.  

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 180803
cwfbox
expires:202609182100;;644813

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
402 am edt fri sep 18 2026

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


anz232-182100-
nantucket sound-
402 am edt fri sep 18 2026

.today...w winds 10 to 15 kt with gusts up to 20 kt, becoming n
5 to 10 kt this afternoon. seas around 2 ft. wave detail: w 2 ft
at 4 seconds and e 1 foot at 7 seconds. a slight chance of
showers this morning. 
.tonight...n winds 10 to 15 kt, increasing to 15 to 20 kt after
midnight. gusts up to 25 kt. seas 2 to 3 ft. wave detail: ne 3 ft
at 4 seconds and sw 1 foot at 5 seconds. 
.sat...ne winds 15 to 20 kt, diminishing to 10 to 15 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, becoming se after midnight. seas
around 2 ft. wave detail: ne 2 ft at 6 seconds and nw 1 foot at
5 seconds. 
.sun...se winds 5 to 10 kt. seas around 2 ft. wave detail: se
1 foot at 3 seconds and e 1 foot at 6 seconds. a chance of
showers in the afternoon. 
.sun night...e winds around 10 kt. seas around 2 ft. wave detail:
se 1 foot at 4 seconds. showers likely. 
.mon...ne winds 15 to 20 kt with gusts up to 25 kt. seas 2 to
3 ft. showers likely. 
.mon night and 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 5 ft. a chance of showers.  

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 180803
cwfbox
expires:202609182100;;644814

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
402 am edt fri sep 18 2026

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


anz233-182100-
vineyard sound-
402 am edt fri sep 18 2026

.today...w winds 10 to 15 kt, becoming n around 5 kt this
afternoon. seas around 2 ft. wave detail: sw 2 ft at 5 seconds
and se 1 foot at 12 seconds. 
.tonight...ne winds 10 to 15 kt, increasing to 15 to 20 kt after
midnight. seas around 2 ft. wave detail: ne 2 ft at 3 seconds and
sw 2 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 around 2 ft. wave detail: ne
2 ft at 4 seconds and sw 1 foot at 5 seconds. 
.sat night...e winds 5 to 10 kt. seas 1 foot or less. wave
detail: ne 1 foot at 4 seconds and w 1 foot at 5 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 3 seconds and e
1 foot at 8 seconds, becoming se 1 foot at 3 seconds and se
1 foot at 7 seconds. a chance of showers in the afternoon. 
.sun night...e winds 5 to 10 kt. seas around 2 ft. wave detail:
se 1 foot at 3 seconds and e 1 foot at 7 seconds. showers, mainly
in the evening. patchy fog after midnight with vsby 1 to 3 nm. 
.mon...ne winds 15 to 20 kt with gusts up to 25 kt. seas 2 to
4 ft. patchy fog. showers likely. vsby 1 to 3 nm. 
.mon night...ne winds 20 to 25 kt. seas 2 to 4 ft. a chance of
showers. 
.tue and tue night...ne winds 20 to 25 kt with gusts up to 30 kt.
seas 3 to 5 ft. a chance of showers.  

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 180803
cwfbox
expires:202609182100;;644815

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
402 am edt fri sep 18 2026

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


anz234-182100-
buzzards bay-
402 am edt fri sep 18 2026

.today...nw winds 5 to 10 kt, becoming n this afternoon. seas
around 2 ft. wave detail: sw 2 ft at 5 seconds and se 1 foot at
9 seconds. 
.tonight...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 sw 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 3 seconds and sw 1 foot at 5 seconds. 
.sat night...e winds 5 to 10 kt. seas 1 foot or less. wave
detail: ne 1 foot at 3 seconds and w 1 foot at 5 seconds. 
.sun...se winds 5 to 10 kt. seas 1 foot or less. wave detail: se
1 foot at 2 seconds and e 1 foot at 8 seconds. a chance of
showers in the afternoon. 
.sun night...e winds 5 to 10 kt. seas 1 foot or less, then around
2 ft after midnight. wave detail: se 1 foot at 2 seconds and e
1 foot at 5 seconds, becoming se 1 foot at 3 seconds. showers.
patchy fog after midnight with vsby 1 to 3 nm. 
.mon...ne winds 15 to 20 kt with gusts up to 25 kt. seas 2 to
4 ft. patchy fog. showers likely. vsby 1 to 3 nm. 
.mon night...ne winds 15 to 20 kt with gusts up to 25 kt. seas
2 to 4 ft. a chance of showers. 
.tue and tue night...ne winds 20 to 25 kt with gusts up to 30 kt.
seas 3 to 5 ft. a chance of showers.  

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 180803
cwfbox
expires:202609182100;;644816

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
402 am edt fri sep 18 2026

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


anz235-182100-
rhode island sound-
402 am edt fri sep 18 2026

.today...nw winds around 10 kt, becoming n this afternoon. seas
2 to 3 ft. wave detail: sw 3 ft at 5 seconds and se 1 foot at
10 seconds. 
.tonight...n winds 10 to 15 kt, becoming ne 15 to 20 kt after
midnight. seas 2 to 3 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 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...e winds 5 to 10 kt. seas around 2 ft. wave detail: e
2 ft at 6 seconds and sw 1 foot at 5 seconds. 
.sun...se winds 5 to 10 kt. seas around 2 ft. wave detail: se
2 ft at 9 seconds and se 1 foot at 5 seconds. a chance of showers
in the afternoon. 
.sun night...e winds 10 to 15 kt. seas 2 to 3 ft. wave detail: se
2 ft at 5 seconds. patchy fog. showers. vsby 1 to 3 nm. 
.mon...ne winds 15 to 20 kt with gusts up to 25 kt. seas 3 to
4 ft. patchy fog. showers likely. vsby 1 to 3 nm. 
.mon night...ne winds 20 to 25 kt with gusts up to 30 kt. seas
2 to 4 ft. a chance of showers. 
.tue...ne winds 25 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. a chance of showers.  

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 180803
cwfbox
expires:202609182100;;644819

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
402 am edt fri sep 18 2026

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


anz236-182100-
narragansett bay-
402 am edt fri sep 18 2026

.today...nw winds 5 to 10 kt, becoming n this afternoon. waves
around 2 ft. patchy fog this morning. 
.tonight...n winds 10 to 15 kt. waves around 2 ft. 
.sat...ne winds 10 to 15 kt, diminishing to 5 to 10 kt in the
afternoon. waves around 2 ft in the morning, then 1 foot or less.
.sat night...e winds 5 to 10 kt. waves 1 foot or less.
.sun...se winds 5 to 10 kt. waves 1 foot or less, then around
2 ft in the afternoon. showers likely in the afternoon. 
.sun night...e winds 5 to 10 kt. waves around 2 ft. patchy fog.
showers. vsby 1 to 3 nm. 
.mon...ne winds 15 to 20 kt with gusts up to 25 kt. waves 2 to
3 ft. a chance of showers. 
.mon night through tue night...ne winds 15 to 20 kt with gusts up
to 30 kt. waves 2 to 3 ft. a chance of showers.  

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 180803
cwfbox
expires:202609182100;;644807

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
402 am edt fri sep 18 2026

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


anz250-182100-
coastal waters east of ipswich bay and the stellwagen bank
national marine sanctuary-
402 am edt fri sep 18 2026

.today...nw winds 5 to 10 kt. seas 2 to 3 ft. wave detail: sw
2 ft at 4 seconds and e 2 ft at 8 seconds. patchy fog. vsby 1 nm
or less. 
.tonight...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: w 4 ft
at 5 seconds and ne 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 3 to 4 ft. wave detail: ne
4 ft at 6 seconds and w 2 ft at 5 seconds. 
.sat night...se winds around 5 kt. seas 2 to 3 ft. wave detail: n
3 ft at 6 seconds. 
.sun...s winds 5 to 10 kt. seas around 2 ft. wave detail: e 2 ft
at 8 seconds and s 1 foot at 2 seconds. a chance of showers in
the afternoon. 
.sun night...se winds 5 to 10 kt, becoming ne after midnight.
seas around 2 ft. wave detail: e 2 ft at 6 seconds and s 1 foot
at 3 seconds. patchy fog. showers likely. vsby 1 to 3 nm. 
.mon...ne winds 10 to 15 kt with gusts up to 25 kt. seas 2 to
3 ft. a chance of showers. 
.mon night and tue...ne winds 15 to 20 kt with gusts up to 30 kt.
seas 2 to 4 ft. 
.tue night...ne winds 15 to 20 kt with gusts up to 30 kt. seas
4 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 180803
cwfbox
expires:202609182100;;644810

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
402 am edt fri sep 18 2026

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


anz254-182100-
coastal waters from provincetown ma to chatham ma to nantucket ma
out 20 nm-
402 am edt fri sep 18 2026

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

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 180803
cwfbox
expires:202609182100;;644811

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
402 am edt fri sep 18 2026

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


anz255-182100-
coastal waters extending out to 25 nm south of marthas vineyard
and nantucket-
402 am edt fri sep 18 2026

.today...w winds 10 to 15 kt with gusts up to 20 kt, becoming n
5 to 10 kt this afternoon. seas 2 to 3 ft. wave detail: sw 3 ft
at 5 seconds and e 2 ft at 8 seconds. a chance of showers this
morning. 
.tonight...ne winds 10 to 15 kt, increasing to 15 to 20 kt with
gusts up to 25 kt after midnight. seas 2 to 4 ft. wave detail: ne
4 ft at 7 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 4 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
3 ft at 7 seconds and nw 1 foot at 5 seconds. 
.sun...se winds 10 to 15 kt. seas around 2 ft. wave detail: se
2 ft at 6 seconds. a chance of showers in the afternoon. 
.sun night...e winds around 10 kt. seas 2 to 4 ft. wave detail:
se 2 ft at 5 seconds. showers likely. patchy fog after midnight
with vsby 1 to 3 nm. 
.mon...ne winds 15 to 20 kt with gusts up to 25 kt. seas 3 to
5 ft. patchy fog. a chance of showers. vsby 1 to 3 nm. 
.mon night...ne winds 20 to 25 kt with gusts up to 30 kt. seas
3 to 5 ft. a chance of showers. 
.tue...ne winds 25 to 30 kt. seas 4 to 6 ft. a chance of showers.
.tue night...ne winds 25 to 30 kt with gusts up to 35 kt. seas
5 to 7 ft. a chance of showers.  

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.

$$