fzus51 kbox 181705
cwfbox
expires:202604190600;;588948

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

coastal waters from the merrimack river ma to watch hill ri out
to 25 nm


anz231-190600-
cape cod bay-
104 pm edt sat apr 18 2026

.this afternoon...ne winds 5 to 10 kt. seas around 2 ft. wave
detail: ne 1 foot at 3 seconds and s 1 foot at 9 seconds. patchy
fog. vsby 1 nm or less. 
.tonight...e winds around 5 kt, becoming s after midnight. seas
around 2 ft. wave detail: ne 1 foot at 3 seconds and s 1 foot at
7 seconds. patchy fog. patchy drizzle. vsby 1 nm or less. 
.sun...s winds 10 to 15 kt, becoming w in the afternoon. gusts up
to 25 kt. seas 2 to 3 ft. wave detail: n 2 ft at 5 seconds and s
1 foot at 7 seconds. patchy fog. a chance of showers in the
morning, then showers in the afternoon. vsby 1 nm or less,
increasing to 1 to 3 nm in the afternoon. 
.sun night...nw winds 15 to 20 kt, becoming w 10 to 15 kt after
midnight. gusts up to 25 kt. seas 2 to 3 ft. wave detail: nw 2 ft
at 4 seconds and s 1 foot at 5 seconds. a chance of showers in
the evening. 
.mon...nw winds 5 to 10 kt. seas around 2 ft. wave detail: nw
2 ft at 4 seconds and ne 1 foot at 6 seconds. 
.mon night...n winds 5 to 10 kt, increasing to 10 to 15 kt with
gusts up to 20 kt after midnight. seas around 2 ft. wave detail:
n 2 ft at 5 seconds and s 1 foot at 7 seconds. 
.tue through wed night...w winds 10 to 15 kt with gusts up to
20 kt. seas around 2 ft.  

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:202604190600;;588952

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

coastal waters from the merrimack river ma to watch hill ri out
to 25 nm


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

.this afternoon...ne winds 10 to 15 kt. seas 2 to 3 ft. wave
detail: ne 2 ft at 4 seconds and s 1 foot at 7 seconds. patchy
fog. vsby 1 nm or less. 
.tonight...ne winds 5 to 10 kt, becoming s after midnight. seas
around 2 ft. wave detail: ne 2 ft at 4 seconds and s 1 foot at
7 seconds. patchy fog. patchy drizzle after midnight. vsby 1 nm
or less. 
.sun...s winds 10 to 15 kt, becoming sw in the afternoon. gusts
up to 25 kt. seas 2 to 3 ft. wave detail: w 2 ft at 3 seconds and
se 2 ft at 7 seconds. patchy fog. a chance of showers in the
morning, then showers in the afternoon. vsby 1 nm or less,
increasing to 1 to 3 nm in the afternoon. 
.sun night...nw winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. seas 2 to 3 ft. wave detail: w 2 ft at 3 seconds
and e 2 ft at 8 seconds. a chance of showers in the evening. 
.mon...w winds 5 to 10 kt. seas around 2 ft. wave detail: w 2 ft
at 3 seconds and s 1 foot at 6 seconds. 
.mon night...nw winds 5 to 10 kt, becoming n 10 to 15 kt after
midnight. seas around 2 ft. wave detail: nw 2 ft at 3 seconds and
s 1 foot at 6 seconds. 
.tue through wed night...w winds 15 to 20 kt. seas 2 to 3 ft.  

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:202604190600;;588953

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

coastal waters from the merrimack river ma to watch hill ri out
to 25 nm


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

.this afternoon...ne winds around 10 kt. seas around 2 ft. wave
detail: sw 2 ft at 7 seconds and ne 1 foot at 3 seconds. patchy
fog. 
.tonight...e winds 5 to 10 kt, becoming s after midnight. seas
around 2 ft. wave detail: ne 1 foot at 3 seconds and s 1 foot at
7 seconds. patchy fog. patchy drizzle after midnight. vsby 1 to
3 nm, decreasing to 1 nm or less after midnight. 
.sun...s winds 10 to 15 kt, becoming w 15 to 20 kt in the
afternoon. gusts up to 25 kt. seas 2 to 3 ft. wave detail: sw
3 ft at 5 seconds and e 1 foot at 6 seconds. patchy fog. a chance
of showers in the morning, then showers in the afternoon. vsby
1 nm or less. 
.sun night...nw winds 15 to 20 kt, becoming w 10 to 15 kt after
midnight. gusts up to 25 kt. seas 2 to 3 ft. wave detail: w 3 ft
at 5 seconds and se 3 ft at 7 seconds. a chance of showers in the
evening. 
.mon...w winds around 10 kt. seas around 2 ft. wave detail: sw
2 ft at 6 seconds and e 1 foot at 7 seconds. 
.mon night...nw winds 10 to 15 kt, becoming n after midnight.
seas around 2 ft. wave detail: sw 2 ft at 5 seconds and e 1 foot
at 7 seconds. 
.tue through wed night...w winds 15 to 20 kt. seas 2 to 3 ft.  

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:202604190600;;588954

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

coastal waters from the merrimack river ma to watch hill ri out
to 25 nm


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

.this afternoon...ne winds around 10 kt. seas around 2 ft. wave
detail: n 2 ft at 3 seconds and s 1 foot at 7 seconds. 
.tonight...ne winds 5 to 10 kt, becoming s after midnight. seas
around 2 ft in the evening, then 1 foot or less. wave detail: ne
1 foot at 4 seconds and s 1 foot at 6 seconds. patchy fog. patchy
drizzle after midnight. vsby 1 to 3 nm, decreasing to 1 nm or
less after midnight. 
.sun...s winds 10 to 15 kt, becoming w in the afternoon. gusts up
to 25 kt. seas 2 to 3 ft. wave detail: sw 2 ft at 4 seconds and e
1 foot at 6 seconds. patchy fog. a chance of showers in the
morning, then showers in the afternoon. vsby 1 nm or less. 
.sun night...nw winds 10 to 15 kt with gusts up to 20 kt. seas
2 to 3 ft. wave detail: nw 2 ft at 3 seconds and sw 2 ft at
5 seconds. a chance of showers in the evening. 
.mon...w winds around 10 kt. seas around 2 ft. wave detail: w
1 foot at 5 seconds and e 1 foot at 8 seconds. 
.mon night...nw winds around 10 kt, becoming n after midnight.
seas around 2 ft. wave detail: ne 2 ft at 6 seconds and sw 1 foot
at 5 seconds. 
.tue through wed night...w winds 15 to 20 kt. seas 2 to 3 ft.  

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:202604190600;;588955

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

coastal waters from the merrimack river ma to watch hill ri out
to 25 nm


anz235-190600-
rhode island sound-
104 pm edt sat apr 18 2026

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

.this afternoon...ne winds 10 to 15 kt. seas 2 to 3 ft. wave
detail: s 3 ft at 7 seconds and ne 2 ft at 4 seconds. 
.tonight...e winds 5 to 10 kt, becoming s after midnight. seas
2 to 3 ft. wave detail: ne 2 ft at 4 seconds and s 2 ft at
7 seconds. patchy fog. patchy drizzle after midnight. vsby 1 to
3 nm, decreasing to 1 nm or less after midnight. 
.sun...s winds 10 to 15 kt, becoming w 15 to 20 kt in the
afternoon. gusts up to 25 kt. seas 2 to 3 ft. wave detail: se
3 ft at 6 seconds. patchy fog. a chance of showers in the
morning, then showers in the afternoon. vsby 1 nm or less. 
.sun night...nw winds 15 to 20 kt, becoming w 10 to 15 kt after
midnight. gusts up to 25 kt. seas 2 to 4 ft. wave detail: se 3 ft
at 7 seconds and w 2 ft at 4 seconds. a chance of showers in the
evening. 
.mon...w winds 10 to 15 kt. seas 2 to 3 ft. wave detail: w 2 ft
at 3 seconds and se 2 ft at 7 seconds. 
.mon night...nw winds 10 to 15 kt, becoming n after midnight.
seas 2 to 3 ft. wave detail: w 2 ft at 3 seconds and sw 2 ft at
7 seconds. 
.tue through wed night...w winds 15 to 20 kt. seas 2 to 3 ft.  

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:202604190600;;588958

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

coastal waters from the merrimack river ma to watch hill ri out
to 25 nm


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

.this afternoon...ne winds around 10 kt. waves around 2 ft. 
.tonight...e winds 5 to 10 kt, becoming s after midnight. waves
around 2 ft. patchy fog. patchy drizzle after midnight. vsby 1 to
3 nm, decreasing to 1 nm or less after midnight. 
.sun...s winds 5 to 10 kt, becoming nw 10 to 15 kt in the
afternoon. gusts up to 20 kt. waves 2 to 3 ft. patchy fog.
showers. vsby 1 nm or less, increasing to 1 to 3 nm in the
afternoon. 
.sun night...nw winds 10 to 15 kt with gusts up to 20 kt,
becoming w 5 to 10 kt after midnight. waves around 2 ft. a chance
of showers in the evening. 
.mon...w winds 5 to 10 kt. waves around 2 ft. 
.mon night...nw winds around 10 kt. waves around 2 ft. 
.tue through wed night...w winds 10 to 15 kt with gusts up to
20 kt. waves around 2 ft.  

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:202604190600;;588946

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

coastal waters from the merrimack river ma to watch hill ri out
to 25 nm


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

.this afternoon...ne winds around 10 kt. seas 3 to 4 ft. wave
detail: e 3 ft at 7 seconds and n 1 foot at 3 seconds. patchy
fog. vsby 1 to 3 nm. 
.tonight...e winds 5 to 10 kt, becoming se after midnight. seas
3 to 4 ft. wave detail: e 4 ft at 7 seconds and n 1 foot at
3 seconds. patchy fog. patchy drizzle. vsby 1 nm or less. 
.sun...s winds 10 to 15 kt, becoming w 15 to 20 kt in the
afternoon. gusts up to 25 kt. seas 3 to 4 ft. wave detail: e 4 ft
at 8 seconds and s 1 foot at 8 seconds. patchy fog. a chance of
showers in the morning, then showers in the afternoon. vsby 1 nm
or less. 
.sun night...nw winds 15 to 20 kt, becoming w 10 to 15 kt after
midnight. gusts up to 25 kt. seas 3 to 4 ft. wave detail: se 4 ft
at 7 seconds and nw 3 ft at 4 seconds. patchy fog in the evening.
showers likely in the evening. 
.mon...w winds 10 to 15 kt, diminishing to 5 to 10 kt in the
afternoon. seas 2 to 4 ft. wave detail: w 2 ft at 4 seconds and
se 2 ft at 7 seconds. 
.mon night...n winds 10 to 15 kt. gusts up to 20 kt after
midnight. seas 2 to 3 ft. wave detail: n 3 ft at 4 seconds and e
3 ft at 8 seconds. 
.tue through wed night...w winds 15 to 20 kt. seas 2 to 4 ft.  

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:202604190600;;588949

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

coastal waters from the merrimack river ma to watch hill ri out
to 25 nm


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

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

.this afternoon...ne winds 10 to 15 kt. seas 3 to 4 ft. wave
detail: ne 3 ft at 5 seconds and s 2 ft at 7 seconds. patchy fog.
patchy drizzle. vsby 1 nm or less. 
.tonight...ne winds 5 to 10 kt, becoming s after midnight. seas
3 to 5 ft. wave detail: e 5 ft at 7 seconds and s 2 ft at
7 seconds. patchy fog. patchy drizzle. vsby 1 nm or less. 
.sun...s winds 10 to 15 kt, becoming sw 15 to 20 kt in the
afternoon. gusts up to 25 kt. seas 3 to 5 ft. wave detail: e 5 ft
at 8 seconds and sw 3 ft at 5 seconds. patchy fog. showers in the
afternoon. vsby 1 nm or less. 
.sun night...nw winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. gusts up to 25 kt. seas 3 to 5 ft. wave detail: e
4 ft at 7 seconds and nw 3 ft at 4 seconds. patchy fog in the
evening. showers likely in the evening. 
.mon...w winds 5 to 10 kt. seas 2 to 4 ft. wave detail: nw 2 ft
at 5 seconds and se 2 ft at 7 seconds. 
.mon night...w winds 5 to 10 kt, becoming n 10 to 15 kt with
gusts up to 20 kt after midnight. seas 2 to 3 ft. wave detail: n
2 ft at 4 seconds and se 2 ft at 7 seconds. 
.tue through wed night...w winds 10 to 15 kt with gusts up to
20 kt. seas 2 to 4 ft.  

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:202604190600;;588950

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

coastal waters from the merrimack river ma to watch hill ri out
to 25 nm


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

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

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

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.

$$