fzus51 kbox 181705
cwfbox
expires:202608190600;;944170

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

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


anz231-190600-
cape cod bay-
105 pm edt tue aug 18 2026

.this afternoon...n winds around 5 kt. seas around 2 ft. wave
detail: n 1 foot at 3 seconds and s 1 foot at 7 seconds. 
.tonight...e winds around 5 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 after midnight with vsby 1 to 3 nm. 
.wed...s winds 5 to 10 kt. 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 to 3 nm. 
.wed night...sw winds 5 to 10 kt. seas around 2 ft in the
evening, then 1 foot or less. wave detail: sw 1 foot at 2 seconds
and e 1 foot at 4 seconds, becoming sw 1 foot at 3 seconds and e
1 foot at 3 seconds. 
.thu...w 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. 
.fri and fri night...n winds 5 to 10 kt, becoming e. seas 1 foot
or less. 
.sat...e winds 5 to 10 kt. seas around 2 ft. showers likely. 
.sat night...e 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 181705
cwfbox
expires:202608190600;;944174

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

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


anz232-190600-
nantucket sound-
105 pm edt tue aug 18 2026

.this afternoon...ne winds 5 to 10 kt. seas around 2 ft. wave
detail: n 1 foot at 3 seconds and s 1 foot at 7 seconds. 
.tonight...nw winds around 5 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. vsby 1 to 3 nm. 
.wed...sw winds 5 to 10 kt, increasing to 10 to 15 kt in the
afternoon. seas around 2 ft. wave detail: se 2 ft at 7 seconds
and sw 1 foot at 2 seconds. patchy fog in the morning with vsby
1 to 3 nm. 
.wed night...sw winds 5 to 10 kt. seas around 2 ft. wave detail:
ne 1 foot at 4 seconds and sw 1 foot at 4 seconds. patchy fog
after midnight with vsby 1 nm or less. 
.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. patchy fog in the
morning with vsby 1 nm or less. 
.thu night...sw winds 5 to 10 kt, becoming nw after midnight.
seas around 2 ft. wave detail: sw 1 foot at 4 seconds and e
1 foot at 8 seconds. 
.fri and fri night...ne winds 5 to 10 kt, becoming e. seas around
2 ft. 
.sat...e winds 10 to 15 kt. seas around 2 ft. a chance of
showers. 
.sat night...se 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 181705
cwfbox
expires:202608190600;;944175

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

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


anz233-190600-
vineyard sound-
105 pm edt tue aug 18 2026

.this afternoon...ne winds around 5 kt. seas around 2 ft. wave
detail: s 2 ft at 6 seconds and ne 1 foot at 3 seconds. 
.tonight...sw winds 5 to 10 kt. seas around 2 ft. wave detail: s
2 ft at 7 seconds and ne 1 foot at 4 seconds. patchy fog after
midnight. 
.wed...sw winds 5 to 10 kt. seas around 2 ft. wave detail: w
1 foot at 3 seconds and e 1 foot at 4 seconds. 
.wed night...sw winds 5 to 10 kt. seas around 2 ft. wave detail:
sw 1 foot at 5 seconds and ne 1 foot at 6 seconds. patchy fog.
vsby 1 to 3 nm, decreasing to 1 nm or less after midnight. 
.thu...sw winds 5 to 10 kt. seas around 2 ft in the morning, then
1 foot or less. wave detail: e 1 foot at 4 seconds and sw 1 foot
at 5 seconds, becoming ne 1 foot at 3 seconds and sw 1 foot at
3 seconds. patchy fog in the morning with vsby 1 to 3 nm. 
.thu night...w winds 5 to 10 kt, becoming nw 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. 
.fri and fri night...ne winds 5 to 10 kt, becoming e. seas 1 foot
or less. 
.sat and sat night...e winds 10 to 15 kt, diminishing to 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 181705
cwfbox
expires:202608190600;;944176

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

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


anz234-190600-
buzzards bay-
105 pm edt tue aug 18 2026

.this afternoon...e winds around 5 kt. seas around 2 ft. wave
detail: ne 1 foot at 2 seconds and s 1 foot at 7 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 to 3 nm. 
.wed...sw winds 5 to 10 kt, increasing to 10 to 15 kt with 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. 
.wed night...sw winds 10 to 15 kt, diminishing to 5 to 10 kt
after midnight. seas around 2 ft. wave detail: sw 1 foot at
3 seconds and ne 1 foot at 4 seconds. patchy fog. vsby 1 to 3 nm,
decreasing to 1 nm or less after midnight. 
.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. patchy fog in the
morning with vsby 1 to 3 nm. 
.thu night...w 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. 
.fri and fri night...ne winds 5 to 10 kt, becoming e. seas 1 foot
or less. 
.sat and sat night...e winds 10 to 15 kt, diminishing to 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 181705
cwfbox
expires:202608190600;;944177

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

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


anz235-190600-
rhode island sound-
105 pm edt tue aug 18 2026

.this afternoon...s winds 5 to 10 kt. seas 2 to 3 ft. wave
detail: s 3 ft at 8 seconds and e 1 foot 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. 
.wed...sw winds around 5 kt, becoming s in the afternoon. seas
2 to 3 ft. wave detail: s 2 ft at 7 seconds and se 2 ft at
8 seconds. 
.wed night...sw winds 5 to 10 kt. seas 2 to 3 ft. wave detail: sw
2 ft at 3 seconds and s 2 ft at 7 seconds. patchy fog after
midnight with vsby 1 nm or less. 
.thu...w winds 5 to 10 kt. seas around 2 ft. wave detail: ne 2 ft
at 4 seconds and se 2 ft at 7 seconds. patchy fog in the morning
with vsby 1 nm or less. 
.thu night...w 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. 
.fri and fri night...e winds 5 to 10 kt. seas around 2 ft. 
.sat and 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 181705
cwfbox
expires:202608190600;;944180

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

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


anz236-190600-
narragansett bay-
105 pm edt tue aug 18 2026

.this afternoon...s winds 5 to 10 kt. waves around 2 ft.
.tonight...sw winds 5 to 10 kt. waves around 2 ft. patchy fog
after midnight with vsby 1 to 3 nm. 
.wed...sw winds around 5 kt, becoming s in the afternoon. 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. patchy fog
after midnight with vsby 1 to 3 nm. 
.thu...w winds 5 to 10 kt. waves around 2 ft in the morning, then
1 foot or less. patchy fog in the morning with vsby 1 to 3 nm. 
.thu night...w winds 5 to 10 kt, becoming nw after midnight.
waves 1 foot or less. 
.fri and fri night...ne winds 5 to 10 kt, becoming e. waves
1 foot or less. 
.sat and sat night...ne 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 181705
cwfbox
expires:202608190600;;944168

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

.this afternoon...ne winds around 5 kt. seas 2 to 4 ft. wave
detail: se 3 ft at 9 seconds and e 2 ft at 5 seconds. 
.tonight...se winds around 5 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 nm or less. 
.wed...s winds around 5 kt, increasing to 5 to 10 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...sw winds 5 to 10 kt. seas 2 to 3 ft. wave detail: se
3 ft at 7 seconds and sw 2 ft at 4 seconds. 
.thu...w winds around 5 kt, becoming ne in the afternoon. seas
around 2 ft. wave detail: se 2 ft at 6 seconds and sw 1 foot at
3 seconds. 
.thu night...s winds around 5 kt, becoming nw 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, becoming e. seas around
2 ft. 
.sat and sat night...e 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 181705
cwfbox
expires:202608190600;;944171

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

.this afternoon...n winds 5 to 10 kt. seas 3 to 4 ft. wave
detail: se 4 ft at 8 seconds and n 2 ft at 4 seconds. 
.tonight...n winds around 5 kt, becoming w around 5 kt 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. 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 5 to 10 kt. seas 2 to 3 ft. wave detail: s
3 ft at 6 seconds and sw 1 foot at 3 seconds. patchy fog after
midnight with vsby 1 nm or less. 
.thu...sw winds 5 to 10 kt. seas around 2 ft. wave detail: se
2 ft at 6 seconds and w 1 foot at 3 seconds. patchy fog in the
morning with vsby 1 to 3 nm. 
.thu night...w winds around 5 kt. seas around 2 ft. wave detail:
se 2 ft at 8 seconds and sw 1 foot at 4 seconds. a chance of
showers after midnight. 
.fri and fri night...ne winds 5 to 10 kt, becoming e. seas around
2 ft. 
.sat and sat night...se winds 5 to 10 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 181705
cwfbox
expires:202608190600;;944172

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

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

$$