fzus51 kbox 181704
cwfbox
expires:202605190600;;775252

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
104 pm edt mon may 18 2026

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


anz231-190600-
cape cod bay-
104 pm edt mon may 18 2026

.this afternoon...se winds around 10 kt. seas around 2 ft. wave
detail: se 1 foot at 2 seconds and sw 1 foot at 3 seconds. 
.tonight...sw winds 10 to 15 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 3 seconds. patchy fog. vsby 1 nm or less in the
evening. 
.tue...sw winds 10 to 15 kt, increasing to 15 to 20 kt in the
afternoon. gusts up to 25 kt. seas 2 to 4 ft. wave detail: sw
2 ft at 3 seconds and ne 1 foot at 4 seconds. patchy fog in the
morning with vsby 1 to 3 nm. 
.tue night...sw winds 15 to 20 kt with gusts up to 25 kt. seas
2 to 4 ft. wave detail: sw 2 ft at 3 seconds and se 1 foot at
9 seconds. 
.wed...sw winds 10 to 15 kt with gusts up to 25 kt. seas 2 to
4 ft. wave detail: sw 2 ft at 3 seconds and se 1 foot at
3 seconds. showers likely in the afternoon. 
.wed night...w winds 10 to 15 kt, becoming nw after midnight.
gusts up to 20 kt. seas 2 to 3 ft. wave detail: w 2 ft at
3 seconds and n 1 foot at 3 seconds. a chance of showers in the
evening. 
.thu through fri...e winds 10 to 15 kt with gusts up to 20 kt.
seas around 2 ft. 
.fri night...s winds 5 to 10 kt. seas 1 foot or less. 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 181704
cwfbox
expires:202605190600;;775256

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
104 pm edt mon may 18 2026

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


anz232-190600-
nantucket sound-
104 pm edt mon may 18 2026

.this afternoon...s winds around 10 kt. seas around 2 ft. wave
detail: e 1 foot at 3 seconds and sw 1 foot at 5 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
e 1 foot at 3 seconds. patchy fog. vsby 1 nm or less. 
.tue...sw winds 15 to 20 kt with gusts up to 25 kt. seas 2 to
4 ft. wave detail: sw 3 ft at 4 seconds and e 1 foot at
4 seconds. patchy fog in the morning with vsby 1 nm or less. 
.tue night...sw winds 15 to 20 kt with gusts up to 25 kt. seas
3 to 4 ft. wave detail: sw 3 ft at 4 seconds and se 1 foot at
9 seconds. patchy fog in the evening with vsby 1 nm or less. 
.wed...sw winds 15 to 20 kt with gusts up to 25 kt. seas 3 to
4 ft. wave detail: sw 3 ft at 4 seconds and se 1 foot at
3 seconds. a chance of showers in the afternoon. 
.wed night...w winds 15 to 20 kt with gusts up to 25 kt, becoming
nw 10 to 15 kt after midnight. seas 2 to 4 ft. wave detail: w
3 ft at 4 seconds and n 2 ft at 2 seconds. a chance of showers. 
.thu through fri...e winds 10 to 15 kt with gusts up to 20 kt.
seas 2 to 3 ft. 
.fri night...se winds 5 to 10 kt. seas around 2 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 181704
cwfbox
expires:202605190600;;775257

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
104 pm edt mon may 18 2026

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


anz233-190600-
vineyard sound-
104 pm edt mon may 18 2026

.this afternoon...s winds around 10 kt. seas around 2 ft. wave
detail: s 2 ft at 7 seconds and e 1 foot at 3 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 6 seconds and
se 3 ft at 9 seconds. patchy fog. vsby 1 nm or less. 
.tue...sw winds 10 to 15 kt, increasing to 15 to 20 kt in the
afternoon. gusts up to 25 kt. seas 2 to 4 ft. wave detail: sw
4 ft at 6 seconds and se 2 ft at 9 seconds. patchy fog in the
morning with vsby 1 nm or less. 
.tue night...sw winds 15 to 20 kt with gusts up to 25 kt. seas
3 to 5 ft. wave detail: sw 5 ft at 6 seconds and e 2 ft at
6 seconds. 
.wed...sw winds 15 to 20 kt with gusts up to 25 kt. seas 3 to
5 ft. wave detail: sw 5 ft at 7 seconds and e 2 ft at 5 seconds.
a chance of showers in the afternoon. 
.wed night...w winds 15 to 20 kt, becoming nw around 10 kt after
midnight. seas 3 to 5 ft, subsiding to 2 to 3 ft after midnight.
wave detail: sw 5 ft at 7 seconds and e 1 foot at 9 seconds,
becoming sw 3 ft at 7 seconds and n 2 ft at 2 seconds. a chance
of showers. 
.thu through fri...e winds 10 to 15 kt. seas 2 to 3 ft. 
.fri night...se winds 5 to 10 kt. seas around 2 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 181704
cwfbox
expires:202605190600;;775258

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
104 pm edt mon may 18 2026

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


anz234-190600-
buzzards bay-
104 pm edt mon may 18 2026

.this afternoon...s winds around 10 kt. seas around 2 ft. wave
detail: e 1 foot at 2 seconds and s 1 foot at 8 seconds. 
.tonight...sw winds 10 to 15 kt. seas around 2 ft. wave detail: s
2 ft at 4 seconds and se 2 ft at 9 seconds. patchy fog. vsby 1 nm
or less. 
.tue...sw winds 10 to 15 kt, increasing to 15 to 20 kt in the
afternoon. gusts up to 25 kt. seas 2 to 4 ft. wave detail: sw
3 ft at 5 seconds and se 2 ft at 8 seconds. patchy fog in the
morning with vsby 1 nm or less. 
.tue night...sw winds 15 to 20 kt with gusts up to 25 kt. seas
3 to 4 ft. wave detail: s 3 ft at 6 seconds and se 1 foot at
18 seconds. 
.wed...sw winds 15 to 20 kt with gusts up to 25 kt. seas 2 to
4 ft. wave detail: s 4 ft at 6 seconds. a chance of showers in
the afternoon. 
.wed night...w winds 10 to 15 kt with gusts up to 20 kt, becoming
nw after midnight. seas 2 to 4 ft. wave detail: sw 3 ft at
6 seconds and n 2 ft at 2 seconds. a chance of showers in the
evening. 
.thu through fri...e winds 5 to 10 kt. seas around 2 ft. 
.fri night...se winds 5 to 10 kt. seas 1 foot or less. 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 181704
cwfbox
expires:202605190600;;775259

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
104 pm edt mon may 18 2026

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


anz235-190600-
rhode island sound-
104 pm edt mon may 18 2026

.this afternoon...s winds around 10 kt. seas 2 to 3 ft. wave
detail: s 3 ft at 7 seconds and e 1 foot at 3 seconds. 
.tonight...sw winds 10 to 15 kt. gusts up to 20 kt after
midnight. seas 2 to 3 ft. wave detail: s 3 ft at 8 seconds and e
1 foot at 3 seconds. patchy fog. vsby 1 nm or less. 
.tue...sw winds 15 to 20 kt with gusts up to 25 kt. seas 3 to
5 ft. wave detail: sw 5 ft at 6 seconds and se 2 ft at 9 seconds.
patchy fog. vsby 1 nm or less, increasing to 1 to 3 nm in the
afternoon. 
.tue night...sw winds 15 to 20 kt with gusts up to 25 kt. seas
4 to 6 ft. wave detail: s 6 ft at 7 seconds. patchy fog in the
evening with vsby 1 nm or less. 
.wed...sw winds 15 to 20 kt with gusts up to 25 kt. seas 4 to
6 ft. wave detail: s 6 ft at 7 seconds. a chance of showers in
the afternoon. 
.wed night...w winds 15 to 20 kt, becoming nw 10 to 15 kt after
midnight. seas 3 to 5 ft. wave detail: s 5 ft at 7 seconds and ne
1 foot at 2 seconds. a chance of showers in the evening. 
.thu and thu night...ne winds 10 to 15 kt, becoming e 5 to 10 kt.
seas 2 to 4 ft. 
.fri...e winds 5 to 10 kt. seas around 2 ft. 
.fri night...se winds 5 to 10 kt. seas around 2 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 181704
cwfbox
expires:202605190600;;775262

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
104 pm edt mon may 18 2026

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


anz236-190600-
narragansett bay-
104 pm edt mon may 18 2026

.this afternoon...s winds around 10 kt. waves around 2 ft. 
.tonight...sw winds around 10 kt. waves around 2 ft. patchy fog.
vsby 1 nm or less. 
.tue...sw winds 10 to 15 kt with gusts up to 20 kt. waves 2 to
3 ft. patchy fog in the morning with vsby 1 nm or less. 
.tue night...sw winds 10 to 15 kt with gusts up to 20 kt. waves
2 to 3 ft. 
.wed...sw winds 10 to 15 kt, increasing to 15 to 20 kt in the
afternoon. gusts up to 25 kt. waves 2 to 4 ft. showers likely in
the afternoon. 
.wed night...nw winds 10 to 15 kt. gusts up to 20 kt in the
evening. waves 2 to 3 ft. a chance of showers in the evening. 
.thu through fri...e winds 10 to 15 kt. waves around 2 ft. 
.fri night...se winds 5 to 10 kt. waves around 2 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 181704
cwfbox
expires:202605190600;;775250

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
104 pm edt mon may 18 2026

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


anz250-190600-
coastal waters east of ipswich bay and the stellwagen bank
national marine sanctuary-
104 pm edt mon may 18 2026

.this afternoon...se winds 10 to 15 kt. seas 2 to 3 ft. wave
detail: e 2 ft at 3 seconds and se 2 ft at 8 seconds. 
.tonight...s winds 10 to 15 kt with gusts up to 20 kt. seas 2 to
3 ft. wave detail: se 3 ft at 7 seconds and s 2 ft at 3 seconds.
patchy fog. vsby 1 nm or less. 
.tue...sw winds 10 to 15 kt with gusts up to 20 kt, becoming s
15 to 20 kt with gusts up to 30 kt in the afternoon. seas 2 to
4 ft. wave detail: sw 3 ft at 4 seconds and se 2 ft at 7 seconds.
patchy fog in the morning with vsby 1 to 3 nm. 
.tue night...sw winds 15 to 20 kt with gusts up to 30 kt. seas
3 to 5 ft. wave detail: sw 3 ft at 4 seconds and se 3 ft at
7 seconds. 
.wed...sw winds 10 to 15 kt with gusts up to 25 kt. seas 2 to
4 ft. wave detail: sw 3 ft at 4 seconds and se 3 ft at 8 seconds.
showers likely in the afternoon. 
.wed night...w winds around 15 kt, becoming nw after midnight.
gusts up to 20 kt. seas 2 to 4 ft. wave detail: n 3 ft at
4 seconds and se 2 ft at 8 seconds. showers likely in the
evening. 
.thu through fri...e winds 10 to 15 kt with gusts up to 20 kt.
seas 2 to 3 ft. 
.fri night...s winds 5 to 10 kt. seas around 2 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 181704
cwfbox
expires:202605190600;;775253

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
104 pm edt mon may 18 2026

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


anz254-190600-
coastal waters from provincetown ma to chatham ma to nantucket ma
out 20 nm-
104 pm edt mon may 18 2026

.this afternoon...se winds around 10 kt. seas 2 to 3 ft. wave
detail: se 3 ft at 8 seconds and sw 2 ft at 5 seconds. patchy
fog. vsby 1 nm or less. 
.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 3 ft at 7 seconds. patchy fog. vsby 1 nm or less. 
.tue...sw winds 15 to 20 kt. gusts up to 30 kt in the afternoon.
seas 3 to 5 ft. wave detail: sw 5 ft at 6 seconds and se 2 ft at
9 seconds. patchy fog. vsby 1 nm or less, increasing to 1 to 3 nm
in the afternoon. 
.tue night...sw winds 15 to 20 kt with gusts up to 30 kt. seas
4 to 6 ft. wave detail: s 5 ft at 7 seconds and e 1 foot at
14 seconds. patchy fog. vsby 1 nm or less, increasing to 1 to
3 nm after midnight. 
.wed...sw winds 15 to 20 kt with gusts up to 25 kt. seas 4 to
6 ft. wave detail: s 5 ft at 7 seconds. a chance of showers in
the afternoon. 
.wed night...w winds 15 to 20 kt, becoming nw 10 to 15 kt after
midnight. gusts up to 25 kt. seas 4 to 6 ft, subsiding to 3 to
4 ft after midnight. wave detail: sw 5 ft at 6 seconds and se
3 ft at 9 seconds, becoming nw 4 ft at 4 seconds and s 2 ft at
8 seconds. a chance of showers. 
.thu through fri...e winds 10 to 15 kt with gusts up to 20 kt.
seas 2 to 4 ft. 
.fri night...s winds 5 to 10 kt. seas around 2 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 181704
cwfbox
expires:202605190600;;775254

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
104 pm edt mon may 18 2026

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


anz255-190600-
coastal waters extending out to 25 nm south of marthas vineyard
and nantucket-
104 pm edt mon may 18 2026

.this afternoon...s winds around 10 kt. seas around 3 ft. wave
detail: s 3 ft at 8 seconds and sw 2 ft at 7 seconds. patchy fog.
vsby 1 nm or less. 
.tonight...sw winds 10 to 15 kt. gusts up to 20 kt after
midnight. seas 2 to 4 ft. wave detail: s 3 ft at 7 seconds and ne
1 foot at 3 seconds. patchy fog. vsby 1 nm or less. 
.tue...sw winds 15 to 20 kt with gusts up to 25 kt. seas 4 to
6 ft. wave detail: sw 6 ft at 6 seconds and se 2 ft at 9 seconds.
patchy fog. vsby 1 nm or less. 
.tue night...sw winds around 20 kt with gusts up to 25 kt. seas
5 to 7 ft. wave detail: sw 7 ft at 7 seconds and e 4 ft at
10 seconds. patchy fog. vsby 1 nm or less. 
.wed...sw winds around 20 kt with gusts up to 25 kt. seas 5 to
7 ft. wave detail: sw 7 ft at 7 seconds and se 1 foot at
3 seconds. 
.wed night...sw winds 15 to 20 kt with gusts up to 25 kt,
becoming nw 10 to 15 kt after midnight. seas 5 to 7 ft, subsiding
to 3 to 5 ft after midnight. wave detail: sw 6 ft at 7 seconds
and e 1 foot at 10 seconds, becoming sw 5 ft at 7 seconds and n
2 ft at 2 seconds. a chance of showers. 
.thu and thu night...ne winds 10 to 15 kt with gusts up to 20 kt,
becoming e 5 to 10 kt. seas 2 to 4 ft. 
.fri...e winds 5 to 10 kt. seas around 2 ft. 
.fri 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.

$$