fzus51 kbox 181405
cwfbox
expires:202608190300;;938591

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
1005 am edt tue aug 18 2026

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


anz231-190300-
cape cod bay-
1005 am edt tue aug 18 2026

.this afternoon...n winds 10 to 15 kt. gusts up to 20 kt. seas
around 2 ft. wave detail: n 2 ft at 3 seconds and e 2 ft at
10 seconds. patchy fog. vsby 1 to 3 nm. 
.tonight...e winds 5 to 10 kt, becoming sw after midnight. seas
around 2 ft. wave detail: s 2 ft at 9 seconds and n 1 foot at
3 seconds. patchy fog. vsby 1 to 3 nm, decreasing to 1 nm or less
after midnight. 
.wed...sw winds around 5 kt, becoming s 10 to 15 kt with gusts up
to 20 kt in the afternoon. seas around 2 ft. wave detail: ne
1 foot at 3 seconds and s 1 foot at 6 seconds. patchy fog in the
morning with vsby 1 nm or less. 
.wed night...sw winds 10 to 15 kt with gusts up to 20 kt,
diminishing to 5 to 10 kt after midnight. seas around 2 ft. wave
detail: sw 1 foot at 2 seconds and e 1 foot at 4 seconds. 
.thu...nw winds around 5 kt, becoming ne in the afternoon. seas
1 foot or less. wave detail: w 1 foot at 2 seconds and se 1 foot
at 6 seconds. 
.thu night...s winds around 5 kt, becoming w after midnight. seas
1 foot or less. wave detail: sw 1 foot at 2 seconds and e 1 foot
at 2 seconds. a chance of showers. 
.fri and fri night...ne winds 5 to 10 kt, becoming e. seas 1 foot
or less. 
.sat...e winds 5 to 10 kt. seas 1 foot or less. a chance of
showers. 
.sat night...e winds 5 to 10 kt. seas 1 foot or less. showers
likely.  

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 181405
cwfbox
expires:202608190300;;938595

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
1005 am edt tue aug 18 2026

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


anz232-190300-
nantucket sound-
1005 am edt tue aug 18 2026

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

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 181405
cwfbox
expires:202608190300;;938596

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
1005 am edt tue aug 18 2026

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


anz233-190300-
vineyard sound-
1005 am edt tue aug 18 2026

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

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 181405
cwfbox
expires:202608190300;;938597

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
1005 am edt tue aug 18 2026

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


anz234-190300-
buzzards bay-
1005 am edt tue aug 18 2026

.this afternoon...ne winds 5 to 10 kt. seas around 2 ft. wave
detail: w 2 ft at 5 seconds and se 2 ft at 9 seconds. 
.tonight...sw winds 5 to 10 kt. seas around 2 ft. wave detail: se
2 ft at 9 seconds and ne 1 foot at 3 seconds. patchy fog after
midnight with vsby 1 nm or less. 
.wed...sw winds 5 to 10 kt. gusts up to 20 kt in the afternoon.
seas around 2 ft. wave detail: w 1 foot at 2 seconds and e 1 foot
at 4 seconds. patchy fog in the morning with vsby 1 to 3 nm. 
.wed night...sw winds 5 to 10 kt. gusts up to 20 kt in the
evening. seas around 2 ft. wave detail: sw 1 foot at 3 seconds
and ne 1 foot at 4 seconds. 
.thu...sw winds 5 to 10 kt. seas 1 foot or less. wave detail: sw
1 foot at 4 seconds and e 1 foot at 4 seconds. 
.thu night...sw winds 5 to 10 kt, becoming nw after midnight.
seas 1 foot or less. wave detail: e 1 foot at 2 seconds and sw
1 foot at 4 seconds. a chance of showers. 
.fri...ne winds 5 to 10 kt. seas 1 foot or less. a chance of
showers. 
.fri night...ne winds 5 to 10 kt. seas 1 foot or less. 
.sat...e winds 5 to 10 kt. seas around 2 ft. a chance of showers.
.sat night...e winds 5 to 10 kt. seas around 2 ft. showers
likely.  

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 181405
cwfbox
expires:202608190300;;938598

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
1005 am edt tue aug 18 2026

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


anz235-190300-
rhode island sound-
1005 am edt tue aug 18 2026

.this afternoon...ne winds 5 to 10 kt, becoming s. seas 2 to
3 ft. wave detail: s 3 ft at 7 seconds and nw 2 ft at 3 seconds. 
.tonight...sw winds 5 to 10 kt. seas 2 to 3 ft. wave detail: se
3 ft at 8 seconds and e 1 foot at 3 seconds. patchy fog after
midnight with vsby 1 nm or less. 
.wed...sw winds 5 to 10 kt. seas 2 to 3 ft. wave detail: s 2 ft
at 7 seconds and se 2 ft at 8 seconds. patchy fog in the morning
with vsby 1 to 3 nm. 
.wed night...sw winds 10 to 15 kt, diminishing to 5 to 10 kt
after midnight. seas 2 to 3 ft. wave detail: sw 2 ft at 3 seconds
and s 2 ft at 7 seconds. 
.thu...sw winds 5 to 10 kt. seas around 2 ft. wave detail: ne
2 ft at 4 seconds and se 2 ft at 7 seconds. 
.thu night...sw winds 5 to 10 kt, becoming nw after midnight.
seas around 2 ft. wave detail: s 2 ft at 8 seconds and se 2 ft at
8 seconds. a chance of showers. 
.fri and fri night...ne winds 5 to 10 kt. seas around 2 ft. 
.sat...e winds 10 to 15 kt. seas around 2 ft. a chance of
showers. 
.sat night...e winds 10 to 15 kt. seas 2 to 3 ft. showers likely.
 

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 181405
cwfbox
expires:202608190300;;938601

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
1005 am edt tue aug 18 2026

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


anz236-190300-
narragansett bay-
1005 am edt tue aug 18 2026

.this afternoon...n winds around 5 kt, becoming s 10 to 15 kt.
waves around 2 ft. a slight chance of showers. 
.tonight...sw winds 5 to 10 kt. waves around 2 ft. patchy fog
after midnight with vsby 1 nm or less. 
.wed...sw winds 5 to 10 kt. waves around 2 ft. patchy fog in the
morning with vsby 1 to 3 nm. 
.wed night...sw winds 5 to 10 kt. waves around 2 ft. 
.thu...w winds 5 to 10 kt. waves around 2 ft in the morning, then
1 foot or less. 
.thu night...sw winds 5 to 10 kt, becoming nw after midnight.
waves around 2 ft in the evening, then 1 foot or less. a chance
of showers. 
.fri and fri night...ne winds 5 to 10 kt. waves 1 foot or less. 
.sat...e winds 5 to 10 kt. waves around 2 ft. a chance of
showers. 
.sat night...e winds 5 to 10 kt. waves around 2 ft. showers
likely.  

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 181405
cwfbox
expires:202608190300;;938589

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
1005 am edt tue aug 18 2026

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


anz250-190300-
coastal waters east of ipswich bay and the stellwagen bank
national marine sanctuary-
1005 am edt tue aug 18 2026

.this afternoon...n winds around 10 kt. gusts up to 20 kt. seas
2 to 3 ft. wave detail: se 3 ft at 9 seconds and e 2 ft at
5 seconds. patchy fog. vsby 1 nm or less. 
.tonight...se winds 5 to 10 kt, becoming sw after midnight. seas
2 to 4 ft. wave detail: s 4 ft at 8 seconds and se 4 ft at
9 seconds. patchy fog. vsby 1 to 3 nm, decreasing to 1 nm or less
after midnight. 
.wed...s winds around 5 kt, increasing to 10 to 15 kt in the
afternoon. seas 2 to 3 ft. wave detail: sw 3 ft at 7 seconds and
se 3 ft at 8 seconds. patchy fog in the morning with vsby 1 nm or
less. 
.wed night...s winds 10 to 15 kt with gusts up to 20 kt, becoming
w 5 to 10 kt after midnight. seas 2 to 3 ft. wave detail: se 3 ft
at 7 seconds and sw 2 ft at 4 seconds. 
.thu...nw winds 5 to 10 kt, becoming e in the afternoon. seas
2 to 3 ft. wave detail: se 2 ft at 6 seconds and sw 1 foot at
3 seconds. 
.thu night...s winds around 5 kt, becoming w after midnight. seas
around 2 ft. wave detail: sw 2 ft at 3 seconds and se 2 ft at
8 seconds. 
.fri and fri night...ne winds 5 to 10 kt. seas around 2 ft. 
.sat...e winds 5 to 10 kt. seas around 2 ft. a chance of showers.
.sat night...e winds 5 to 10 kt. seas around 2 ft. showers
likely.  

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 181405
cwfbox
expires:202608190300;;938592

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
1005 am edt tue aug 18 2026

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


anz254-190300-
coastal waters from provincetown ma to chatham ma to nantucket ma
out 20 nm-
1005 am edt tue aug 18 2026

.this afternoon...n winds 10 to 15 kt with gusts up to 20 kt.
seas 2 to 4 ft. wave detail: s 4 ft at 8 seconds and n 2 ft at
3 seconds. patchy fog. vsby 1 to 3 nm, decreasing to 1 nm or
less. 
.tonight...n winds 5 to 10 kt, becoming w after midnight. seas
3 to 4 ft. wave detail: se 4 ft at 8 seconds and s 3 ft at
7 seconds. patchy fog. vsby 1 nm or less. 
.wed...s winds 5 to 10 kt, increasing to 10 to 15 kt with gusts
up to 20 kt in the afternoon. seas 2 to 4 ft. wave detail: s 3 ft
at 7 seconds and w 1 foot at 2 seconds. patchy fog in the morning
with vsby 1 nm or less. 
.wed night...sw winds 10 to 15 kt with gusts up to 20 kt,
diminishing to 5 to 10 kt after midnight. seas 2 to 3 ft. wave
detail: s 3 ft at 6 seconds and sw 1 foot at 3 seconds. 
.thu...sw winds 5 to 10 kt. seas 2 to 3 ft. wave detail: se 2 ft
at 6 seconds and w 1 foot at 3 seconds. 
.thu night...sw winds 5 to 10 kt. seas around 2 ft. wave detail:
se 2 ft at 8 seconds and sw 1 foot at 4 seconds. a chance of
showers. 
.fri through sat night...se winds 5 to 10 kt. seas 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 181405
cwfbox
expires:202608190300;;938593

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
1005 am edt tue aug 18 2026

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


anz255-190300-
coastal waters extending out to 25 nm south of marthas vineyard
and nantucket-
1005 am edt tue aug 18 2026

.this afternoon...n winds 10 to 15 kt with gusts up to 20 kt.
seas 3 to 4 ft. wave detail: s 4 ft at 7 seconds and se 3 ft at
9 seconds. 
.tonight...nw winds 5 to 10 kt, becoming sw after midnight. seas
2 to 4 ft. wave detail: s 3 ft at 7 seconds and se 3 ft at
8 seconds. patchy fog. vsby 1 to 3 nm, decreasing to 1 nm or less
after midnight. 
.wed...sw winds 5 to 10 kt. gusts up to 20 kt in the afternoon.
seas 2 to 3 ft. wave detail: s 2 ft at 7 seconds and se 2 ft at
8 seconds. patchy fog in the morning with vsby 1 to 3 nm. 
.wed night...sw winds 5 to 10 kt. gusts up to 20 kt in the
evening. seas 2 to 3 ft. wave detail: sw 2 ft at 3 seconds and s
2 ft at 7 seconds. 
.thu...sw winds 5 to 10 kt. seas around 2 ft. wave detail: se
2 ft at 7 seconds and w 1 foot at 4 seconds. 
.thu night...sw winds 5 to 10 kt. seas around 2 ft. wave detail:
se 2 ft at 7 seconds and sw 1 foot at 4 seconds. a chance of
showers. 
.fri...ne winds 5 to 10 kt. seas around 2 ft. a chance of showers
and tstms. 
.fri night and sat...ne winds 5 to 10 kt, becoming e 10 to 15 kt.
seas 2 to 3 ft. a chance of showers. 
.sat night...se winds 10 to 15 kt. seas 2 to 3 ft. showers
likely.  

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.

$$