fzus51 kbox 180504
cwfbox
expires:202605181800;;747807

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

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


anz231-181800-
cape cod bay-
104 am edt mon may 18 2026

.rest of tonight...ne winds 5 to 10 kt. seas 1 foot or less. wave
detail: nw 1 foot at 3 seconds and e 1 foot at 8 seconds. 
.mon...se winds 5 to 10 kt. seas 1 foot or less, then around 2 ft
in the afternoon. wave detail: ne 1 foot at 2 seconds and nw
1 foot at 3 seconds, becoming e 1 foot at 2 seconds and nw 1 foot
at 3 seconds. 
.mon night...s winds 10 to 15 kt. gusts up to 20 kt after
midnight. seas around 2 ft. wave detail: se 1 foot at 3 seconds
and e 1 foot at 14 seconds. 
.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 e 1 foot at 4 seconds. 
.tue night...sw winds 15 to 20 kt with gusts up to 25 kt. seas
3 to 4 ft. wave detail: sw 2 ft at 4 seconds and se 2 ft at
10 seconds. 
.wed and wed night...nw 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 2 ft at
9 seconds. a chance of showers through the night. 
.thu through fri...e winds 10 to 15 kt with gusts up to 20 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 180504
cwfbox
expires:202605181800;;747811

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

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


anz232-181800-
nantucket sound-
104 am edt mon may 18 2026

.rest of tonight...n winds 5 to 10 kt. seas around 2 ft. wave
detail: sw 2 ft at 5 seconds and e 1 foot at 8 seconds. 
.mon...e winds around 10 kt, becoming se in the afternoon. seas
around 2 ft. wave detail: e 1 foot at 5 seconds and sw 1 foot at
6 seconds. 
.mon night...sw winds 10 to 15 kt. gusts up to 20 kt after
midnight. seas around 2 ft. wave detail: sw 2 ft at 3 seconds and
se 1 foot at 5 seconds. patchy fog. vsby 1 to 3 nm, decreasing to
1 nm or less after midnight. 
.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 se 1 foot at
8 seconds. patchy fog in the morning with vsby 1 nm or less. 
.tue night and wed...sw winds 15 to 20 kt with gusts up to 25 kt.
seas 3 to 4 ft. wave detail: sw 4 ft at 4 seconds and se 1 foot
at 9 seconds. 
.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: sw
3 ft at 4 seconds and se 1 foot at 9 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 180504
cwfbox
expires:202605181800;;747812

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

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


anz233-181800-
vineyard sound-
104 am edt mon may 18 2026

.rest of tonight...n winds 5 to 10 kt. seas 2 to 3 ft. wave
detail: sw 3 ft at 7 seconds and se 2 ft at 9 seconds. 
.mon...e winds around 10 kt, becoming se in the afternoon. seas
2 to 3 ft. wave detail: sw 3 ft at 7 seconds and e 2 ft at
4 seconds. 
.mon night...sw winds 10 to 15 kt. seas around 2 ft. wave detail:
sw 2 ft at 6 seconds and se 1 foot at 6 seconds. patchy fog. vsby
1 to 3 nm, decreasing to 1 nm or less after midnight. 
.tue...sw winds 15 to 20 kt with gusts up to 25 kt. seas 2 to
4 ft. wave detail: sw 4 ft at 5 seconds and s 1 foot 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 4 ft. wave detail: sw 4 ft at 6 seconds and se 3 ft at
6 seconds. 
.wed and wed night...nw 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 se 2 ft at
5 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 180504
cwfbox
expires:202605181800;;747813

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

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


anz234-181800-
buzzards bay-
104 am edt mon may 18 2026

.rest of tonight...n winds 5 to 10 kt. seas around 2 ft. wave
detail: sw 2 ft at 6 seconds and se 1 foot at 8 seconds. 
.mon...e winds 5 to 10 kt, becoming se in the afternoon. seas
around 2 ft. wave detail: e 1 foot at 2 seconds and sw 1 foot at
7 seconds. 
.mon night...sw winds 10 to 15 kt. seas around 2 ft. wave detail:
s 2 ft at 5 seconds. patchy fog after midnight with 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 se 1 foot at
10 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
3 to 4 ft. wave detail: s 4 ft at 5 seconds. 
.wed and wed night...nw winds 15 to 20 kt with gusts up to 25 kt.
seas 2 to 4 ft. wave detail: s 4 ft at 5 seconds. a chance of
showers through the night. 
.thu through 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 180504
cwfbox
expires:202605181800;;747814

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

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


anz235-181800-
rhode island sound-
104 am edt mon may 18 2026

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

$$

fzus51 kbox 180504
cwfbox
expires:202605181800;;747817

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

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


anz236-181800-
narragansett bay-
104 am edt mon may 18 2026

.rest of tonight...n winds 5 to 10 kt. waves around 2 ft. 
.mon...e winds 5 to 10 kt, becoming se in the afternoon. waves
around 2 ft. 
.mon night...s winds around 10 kt. waves around 2 ft. patchy fog
after midnight with 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. waves 2 to 3 ft. 
.tue night...sw winds 10 to 15 kt with gusts up to 20 kt. waves
2 to 3 ft. 
.wed and wed night...nw winds 15 to 20 kt with gusts up to 25 kt.
waves 2 to 4 ft. a chance of showers through the night. 
.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 180504
cwfbox
expires:202605181800;;747805

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

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


anz250-181800-
coastal waters east of ipswich bay and the stellwagen bank
national marine sanctuary-
104 am edt mon may 18 2026

.rest of tonight...ne winds 5 to 10 kt. seas 2 to 3 ft. wave
detail: e 2 ft at 8 seconds and nw 1 foot at 3 seconds. 
.mon...e winds 5 to 10 kt, becoming se 10 to 15 kt with gusts up
to 20 kt in the afternoon. seas 2 to 3 ft. wave detail: se 3 ft
at 7 seconds and w 1 foot at 3 seconds. 
.mon night...s winds 10 to 15 kt with gusts up to 20 kt. seas
2 to 3 ft. wave detail: s 3 ft at 4 seconds. 
.tue...sw winds 10 to 15 kt with gusts up to 20 kt, increasing to
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 3 ft at 8 seconds.
.tue night...sw winds 15 to 20 kt with gusts up to 30 kt. seas
3 to 4 ft. wave detail: sw 4 ft at 5 seconds and se 3 ft at
8 seconds. 
.wed and wed night...nw winds around 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. a chance of showers through the night. 
.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 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 180504
cwfbox
expires:202605181800;;747808

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

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


anz254-181800-
coastal waters from provincetown ma to chatham ma to nantucket ma
out 20 nm-
104 am edt mon may 18 2026

.rest of tonight...ne winds 5 to 10 kt. seas 2 to 4 ft. wave
detail: se 3 ft at 8 seconds and w 2 ft at 4 seconds. 
.mon...e winds around 10 kt, becoming se in the afternoon. seas
2 to 3 ft. wave detail: ne 3 ft at 7 seconds and w 2 ft at
4 seconds. 
.mon night...sw winds 10 to 15 kt. gusts up to 20 kt after
midnight. seas 2 to 3 ft. wave detail: s 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 with gusts up to 30 kt. seas 3 to
5 ft. wave detail: sw 5 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 around 20 kt with gusts up to 30 kt. seas
3 to 5 ft. wave detail: sw 5 ft at 6 seconds and se 2 ft at
9 seconds. 
.wed...sw winds 15 to 20 kt with gusts up to 30 kt. seas 4 to
6 ft. wave detail: sw 5 ft at 6 seconds and se 2 ft at 9 seconds.
a chance of showers in the afternoon. 
.wed night...sw winds 15 to 20 kt, becoming nw 10 to 15 kt after
midnight. gusts up to 25 kt. seas 4 to 6 ft. 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...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 180504
cwfbox
expires:202605181800;;747809

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

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


anz255-181800-
coastal waters extending out to 25 nm south of marthas vineyard
and nantucket-
104 am edt mon may 18 2026

.rest of tonight...nw winds 5 to 10 kt. seas 3 to 4 ft. wave
detail: s 4 ft at 7 seconds and e 1 foot at 8 seconds. patchy
fog. vsby 1 to 3 nm. 
.mon...e winds 5 to 10 kt, becoming se in the afternoon. seas
2 to 4 ft. wave detail: s 4 ft at 7 seconds and se 3 ft at
8 seconds. 
.mon night...sw winds 10 to 15 kt. gusts up to 20 kt after
midnight. seas 2 to 3 ft. wave detail: s 3 ft at 7 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 in the morning with vsby 1 nm or less. 
.tue night and wed...sw winds 20 to 25 kt. seas 4 to 6 ft. wave
detail: sw 6 ft at 7 seconds and e 2 ft at 9 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 7 ft at 7 seconds
and e 2 ft at 10 seconds, becoming sw 5 ft at 7 seconds and se
2 ft at 9 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.

$$