fzus51 kbox 181705
cwfbox
expires:202607190600;;183966

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

...small craft advisory in effect through sunday morning...

.this afternoon...s winds 15 to 20 kt with gusts up to 30 kt.
seas 3 to 4 ft. wave detail: sw 2 ft at 3 seconds and e 1 foot at
8 seconds. areas of smoke. showers with a slight chance of tstms.
.tonight...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 e 1 foot at
11 seconds. a chance of tstms. showers likely in the evening,
then a chance of showers after midnight. areas of smoke in the
evening with vsby 1 to 3 nm. 
.sun...nw winds 10 to 15 kt, diminishing to 5 to 10 kt in the
afternoon. gusts up to 20 kt. seas 2 to 3 ft. wave detail: sw
2 ft at 3 seconds and se 1 foot at 9 seconds. 
.sun night...nw winds around 5 kt. seas 1 foot or less. wave
detail: nw 1 foot at 4 seconds and e 1 foot at 8 seconds. 
.mon and mon night...s winds 5 to 10 kt. seas around 2 ft. wave
detail: n 1 foot at 4 seconds and s 1 foot at 7 seconds. 
.tue...s winds 10 to 15 kt with gusts up to 20 kt. seas 2 to
3 ft. wave detail: sw 1 foot at 3 seconds and e 1 foot at
5 seconds. a chance of showers. 
.tue night...s winds 15 to 20 kt with gusts up to 30 kt. seas
2 to 3 ft. showers with a chance of tstms. 
.wed...s winds 20 to 25 kt with gusts up to 35 kt. seas 3 to
5 ft. showers.
.wed night...sw winds 15 to 20 kt with gusts up to 30 kt. seas
2 to 4 ft. a chance of showers.  

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 181705
cwfbox
expires:202607190600;;183970

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

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


anz232-190600-
nantucket sound-
104 pm edt sat jul 18 2026

...small craft advisory in effect through sunday morning...

.this afternoon...s winds 15 to 20 kt with gusts up to 25 kt.
seas around 3 ft. wave detail: sw 3 ft at 4 seconds and se 1 foot
at 8 seconds. patchy smoke. showers.
.tonight...sw winds 20 to 25 kt with gusts up to 30 kt. seas 3 to
4 ft. wave detail: sw 4 ft at 4 seconds and se 1 foot at
8 seconds. a chance of tstms. showers in the evening, then a
chance of showers after midnight. areas of smoke in the evening.
vsby 1 to 3 nm. 
.sun...w winds 15 to 20 kt with gusts up to 25 kt, becoming nw
5 to 10 kt in the afternoon. seas 2 to 4 ft. wave detail: s 3 ft
at 7 seconds and w 2 ft at 4 seconds. 
.sun night...sw winds 5 to 10 kt, becoming nw after midnight.
seas 2 to 3 ft. wave detail: w 1 foot at 3 seconds and s 1 foot
at 7 seconds. 
.mon and mon night...s winds 5 to 10 kt. seas around 2 ft. wave
detail: s 2 ft at 4 seconds and nw 1 foot at 3 seconds. 
.tue...se winds 10 to 15 kt with gusts up to 20 kt. seas 2 to
3 ft. wave detail: s 3 ft at 4 seconds and w 1 foot at 4 seconds.
a chance of showers. 
.tue night...s winds 20 to 25 kt with gusts up to 30 kt. seas
4 to 6 ft. showers with a chance of tstms. 
.wed...sw winds 25 to 30 kt with gusts up to 35 kt. seas 4 to
6 ft. showers.
.wed night...sw winds 25 to 30 kt with gusts up to 35 kt. seas
4 to 6 ft. a chance of showers.  

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 181705
cwfbox
expires:202607190600;;183971

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

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


anz233-190600-
vineyard sound-
104 pm edt sat jul 18 2026

...small craft advisory in effect through sunday morning...

.this afternoon...s 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 smoke. showers with a slight chance of
tstms. 
.tonight...sw winds 20 to 25 kt with gusts up to 30 kt. seas 3 to
4 ft. wave detail: s 4 ft at 6 seconds and se 1 foot at
14 seconds. a chance of tstms. showers in the evening, then
showers likely after midnight. areas of smoke in the evening with
vsby 1 nm or less. 
.sun...w winds 10 to 15 kt. gusts up to 20 kt in the morning.
seas 2 to 4 ft. wave detail: w 4 ft at 6 seconds and se 1 foot at
8 seconds. 
.sun night...w winds 5 to 10 kt, becoming nw after midnight. seas
2 to 3 ft. wave detail: w 3 ft at 6 seconds and se 1 foot at
6 seconds. 
.mon and mon night...s winds 5 to 10 kt. seas around 2 ft. wave
detail: sw 2 ft at 8 seconds and nw 1 foot at 5 seconds. 
.tue...se winds 10 to 15 kt with gusts up to 20 kt. seas 2 to
3 ft. wave detail: sw 2 ft at 6 seconds and se 1 foot at
9 seconds. a chance of showers.
.tue night...s winds 20 to 25 kt with gusts up to 30 kt. seas
3 to 5 ft. showers with a chance of tstms. 
.wed...sw winds 25 to 30 kt with gusts up to 35 kt. seas 5 to
7 ft. showers.
.wed night...sw winds 25 to 30 kt with gusts up to 35 kt. seas
4 to 6 ft. a chance of showers.  

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 181705
cwfbox
expires:202607190600;;183972

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

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


anz234-190600-
buzzards bay-
104 pm edt sat jul 18 2026

...small craft advisory in effect through sunday morning...

.this afternoon...s winds 15 to 20 kt with gusts up to 30 kt.
seas 3 to 4 ft. wave detail: sw 2 ft at 4 seconds and se 1 foot
at 9 seconds. patchy smoke. showers with a slight chance of
tstms. 
.tonight...sw winds 20 to 25 kt with gusts up to 30 kt. seas 2 to
4 ft. wave detail: sw 4 ft at 5 seconds and se 2 ft at 8 seconds.
a chance of tstms. showers likely in the evening, then a chance
of showers after midnight. areas of smoke in the evening with
vsby 1 nm or less. 
.sun...nw winds 10 to 15 kt. gusts up to 20 kt in the morning.
seas 2 to 3 ft. wave detail: sw 3 ft at 7 seconds and w 1 foot at
4 seconds. 
.sun night...nw winds 5 to 10 kt. seas around 2 ft. wave detail:
s 2 ft at 7 seconds and nw 1 foot at 3 seconds. 
.mon and mon night...s winds 10 to 15 kt with gusts up to 20 kt.
seas around 2 ft. wave detail: se 2 ft at 6 seconds and sw 2 ft
at 6 seconds. 
.tue...s winds 10 to 15 kt with gusts up to 25 kt. seas 2 to
3 ft. wave detail: sw 2 ft at 4 seconds and se 1 foot at
9 seconds. a chance of showers. 
.tue night...s winds 20 to 25 kt with gusts up to 30 kt. seas
3 to 5 ft. showers with a chance of tstms. 
.wed...sw winds 25 to 30 kt with gusts up to 40 kt. seas 4 to
6 ft. showers.
.wed night...sw winds 25 to 30 kt with gusts up to 35 kt. seas
3 to 5 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.

$$

fzus51 kbox 181705
cwfbox
expires:202607190600;;183973

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

...small craft advisory in effect through sunday morning...

.this afternoon...s winds 15 to 20 kt with gusts up to 25 kt.
seas around 3 ft. wave detail: sw 3 ft at 5 seconds and se 1 foot
at 8 seconds. areas of smoke. showers with a slight chance of
tstms. 
.tonight...sw winds 20 to 25 kt with gusts up to 30 kt. seas 3 to
5 ft. wave detail: sw 5 ft at 5 seconds and s 3 ft at 8 seconds.
a chance of tstms. showers in the evening, then a chance of
showers after midnight. areas of smoke in the evening with vsby
1 nm or less. 
.sun...w winds 10 to 15 kt. gusts up to 20 kt in the morning.
seas 3 to 4 ft. wave detail: sw 4 ft at 7 seconds and se 2 ft at
8 seconds. 
.sun night...nw winds 5 to 10 kt. seas 2 to 4 ft. wave detail: sw
4 ft at 6 seconds and se 1 foot at 12 seconds. 
.mon and mon night...s winds 5 to 10 kt. seas 2 to 3 ft. wave
detail: sw 3 ft at 7 seconds and se 1 foot at 12 seconds. 
.tue...se winds 10 to 15 kt with gusts up to 20 kt. seas 2 to
3 ft. wave detail: s 3 ft at 8 seconds and w 1 foot at 5 seconds.
a chance of showers. 
.tue night...s winds 20 to 25 kt with gusts up to 30 kt. seas
4 to 6 ft. showers with a chance of tstms. 
.wed...sw winds 25 to 30 kt with gusts up to 35 kt. seas 5 to
8 ft. showers.
.wed night...sw winds 25 to 30 kt. seas 5 to 8 ft. a chance of
showers.  

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 181705
cwfbox
expires:202607190600;;183976

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

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


anz236-190600-
narragansett bay-
104 pm edt sat jul 18 2026

...small craft advisory in effect through sunday morning...

.this afternoon...s winds 15 to 20 kt with gusts up to 25 kt.
waves around 3 ft. smoke. showers likely with a slight chance of
tstms. vsby 1 to 3 nm. 
.tonight...sw winds 15 to 20 kt with gusts up to 25 kt. waves
2 to 3 ft. a chance of tstms. showers likely in the evening.
smoke in the evening with vsby 1 nm or less. 
.sun...nw winds 10 to 15 kt. waves 2 to 3 ft. 
.sun night...nw winds 5 to 10 kt. waves around 2 ft. 
.mon and mon night...s winds 5 to 10 kt. waves around 2 ft. 
.tue...s winds 10 to 15 kt with gusts up to 20 kt. waves around
2 ft. a chance of showers. 
.tue night...s winds 15 to 20 kt with gusts up to 25 kt. waves
2 to 4 ft. showers with a chance of tstms. 
.wed...sw winds 20 to 25 kt with gusts up to 30 kt. waves 3 to
5 ft. showers.
.wed night...sw winds 15 to 20 kt with gusts up to 30 kt. waves
2 to 4 ft. showers likely with a chance of tstms.  

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 181705
cwfbox
expires:202607190600;;183964

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

...small craft advisory in effect through sunday morning...

.this afternoon...s winds 20 to 25 kt with gusts up to 30 kt.
seas 3 to 5 ft. wave detail: s 5 ft at 5 seconds and w 2 ft at
4 seconds. areas of smoke. a chance of showers with a slight
chance of tstms. 
.tonight...s winds 20 to 25 kt, becoming sw 15 to 20 kt after
midnight. gusts up to 30 kt. seas 4 to 6 ft. wave detail: s 5 ft
at 6 seconds and e 1 foot at 14 seconds. a chance of showers. a
chance of tstms in the evening. areas of smoke in the evening
with vsby 1 to 3 nm.
.sun...nw winds 10 to 15 kt with gusts up to 25 kt. seas 2 to
4 ft. wave detail: se 4 ft at 7 seconds and w 2 ft at 4 seconds. 
.sun night...nw winds 5 to 10 kt. seas around 2 ft. wave detail:
nw 2 ft at 4 seconds and se 2 ft at 7 seconds. 
.mon and mon night...s winds 10 to 15 kt with gusts up to 20 kt.
seas around 2 ft. wave detail: s 2 ft at 4 seconds and nw 1 foot
at 3 seconds. 
.tue...s winds 10 to 15 kt with gusts up to 25 kt. seas 2 to
3 ft. wave detail: s 3 ft at 4 seconds and se 1 foot at
8 seconds. a chance of showers. 
.tue night...se winds 15 to 20 kt with gusts up to 30 kt. seas
3 to 4 ft. showers with a chance of tstms. 
.wed...s winds 15 to 20 kt with gusts up to 35 kt. seas 4 to
6 ft. showers.
.wed night...sw winds 15 to 20 kt with gusts up to 35 kt. seas
4 to 6 ft. a chance of showers.  

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 181705
cwfbox
expires:202607190600;;183967

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

...small craft advisory in effect through sunday evening...

.this afternoon...s winds 15 to 20 kt with gusts up to 25 kt.
seas 2 to 4 ft. wave detail: s 4 ft at 4 seconds and nw 1 foot at
4 seconds. patchy smoke. a chance of showers. 
.tonight...sw winds 20 to 25 kt with gusts up to 30 kt. seas 4 to
6 ft. wave detail: sw 5 ft at 5 seconds and e 1 foot at
8 seconds. a chance of tstms. showers likely in the evening, then
a chance of showers after midnight. areas of smoke in the
evening. vsby 1 nm or less. 
.sun...w winds 15 to 20 kt, becoming nw 10 to 15 kt in the
afternoon. gusts up to 25 kt. seas 3 to 5 ft. wave detail: s 5 ft
at 7 seconds and w 2 ft at 4 seconds. 
.sun night...sw winds 5 to 10 kt, becoming nw after midnight.
seas 2 to 4 ft. wave detail: se 3 ft at 7 seconds and nw 1 foot
at 4 seconds. 
.mon and mon night...s winds 5 to 10 kt. seas 2 to 3 ft. wave
detail: s 3 ft at 8 seconds and nw 1 foot at 4 seconds. 
.tue...se winds 10 to 15 kt with gusts up to 20 kt. seas 2 to
3 ft. wave detail: s 3 ft at 5 seconds and w 1 foot at 3 seconds.
a chance of showers. 
.tue night...s winds 20 to 25 kt with gusts up to 30 kt. seas
4 to 6 ft. showers with a chance of tstms. 
.wed...s winds 20 to 25 kt with gusts up to 35 kt. seas 6 to
9 ft. showers with a chance of tstms. 
.wed night...sw winds 25 to 30 kt with gusts up to 35 kt. seas
6 to 9 ft. a chance of showers.  

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 181705
cwfbox
expires:202607190600;;183968

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

...small craft advisory in effect through sunday evening...

.this afternoon...s winds 15 to 20 kt with gusts up to 25 kt.
seas 2 to 3 ft. wave detail: s 3 ft at 4 seconds and nw 1 foot at
5 seconds. patchy smoke. showers likely. 
.tonight...sw winds 20 to 25 kt with gusts up to 30 kt. seas 3 to
5 ft, building to 5 to 6 ft after midnight. wave detail: s 5 ft
at 5 seconds and nw 1 foot at 6 seconds, becoming sw 6 ft at
6 seconds and nw 2 ft at 6 seconds. a chance of tstms. showers in
the evening, then a chance of showers after midnight. areas of
smoke in the evening. vsby 1 nm or less. 
.sun...w winds 15 to 20 kt with gusts up to 25 kt, diminishing to
5 to 10 kt in the afternoon. seas 4 to 6 ft. wave detail: w 6 ft
at 6 seconds and e 1 foot at 9 seconds. 
.sun night...sw winds 5 to 10 kt, becoming nw after midnight.
seas 3 to 5 ft. wave detail: sw 4 ft at 7 seconds and nw 1 foot
at 3 seconds. 
.mon and mon night...s winds 5 to 10 kt. seas 2 to 4 ft. wave
detail: s 4 ft at 8 seconds and nw 1 foot at 3 seconds. 
.tue...se winds 10 to 15 kt with gusts up to 20 kt. seas 2 to
3 ft. wave detail: s 3 ft at 7 seconds and nw 1 foot at
5 seconds. a chance of showers.
.tue night...s winds 20 to 25 kt with gusts up to 30 kt. seas
5 to 7 ft. showers with a chance of tstms. 
.wed...sw winds 25 to 30 kt with gusts up to 35 kt. seas 7 to
10 ft. showers.
.wed night...sw winds 25 to 30 kt with gusts up to 35 kt. seas
8 to 11 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.

$$