fzus51 kbox 180805
cwfbox
expires:202606182100;;945667

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
405 am edt thu jun 18 2026

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


anz231-182100-
cape cod bay-
405 am edt thu jun 18 2026

...gale warning in effect from 11 am edt this morning through
this evening...

.today...s winds 15 to 20 kt with gusts up to 25 kt, increasing
to 20 to 25 kt with gusts up to 35 kt this afternoon. seas 2 to
3 ft. wave detail: s 3 ft at 4 seconds and sw 2 ft at 7 seconds.
a chance of showers with a slight chance of tstms this afternoon.
.tonight...sw winds 20 to 25 kt with gusts up to 35 kt,
diminishing to 10 to 15 kt with gusts up to 20 kt after midnight.
seas 3 to 5 ft, subsiding to 2 ft after midnight. wave detail: s
3 ft at 4 seconds and se 3 ft at 7 seconds, becoming sw 2 ft at
4 seconds and e 2 ft at 8 seconds. patchy fog. vsby 1 to 3 nm in
the evening. 
.fri...sw winds 10 to 15 kt with gusts up to 20 kt. seas 2 to
3 ft. wave detail: sw 2 ft at 3 seconds and e 2 ft at 8 seconds. 
.fri night...w winds 10 to 15 kt with gusts up to 20 kt. seas
2 to 3 ft. wave detail: w 2 ft at 3 seconds and e 1 foot at
7 seconds. 
.sat and sat night...w winds 10 to 15 kt with gusts up to 20 kt.
seas 2 to 3 ft. wave detail: w 2 ft at 4 seconds and e 2 ft at
8 seconds. 
.sun and sun night...w winds 5 to 10 kt, becoming sw. seas 1 foot
or less. wave detail: nw 1 foot at 4 seconds and ne 1 foot at
8 seconds. 
.mon and mon night...s winds 5 to 10 kt, becoming sw 10 to 15 kt.
gusts up to 20 kt. seas 2 to 3 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 180805
cwfbox
expires:202606182100;;945671

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
405 am edt thu jun 18 2026

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


anz232-182100-
nantucket sound-
405 am edt thu jun 18 2026

...gale warning in effect from 11 am edt this morning through
this evening...

.today...s winds 15 to 20 kt with gusts up to 25 kt, increasing
to 20 to 25 kt with gusts up to 35 kt this afternoon. seas 2 to
3 ft, building to 3 to 5 ft this afternoon. wave detail: s 3 ft
at 4 seconds and e 1 foot at 7 seconds, becoming s 4 ft at
4 seconds and sw 4 ft at 7 seconds. patchy fog this afternoon. a
slight chance of showers this afternoon with vsby 1 to 3 nm. 
.tonight...sw winds 20 to 25 kt, diminishing to 15 to 20 kt after
midnight. gusts up to 30 kt. seas 3 to 5 ft. wave detail: sw 4 ft
at 4 seconds and sw 4 ft at 7 seconds. patchy fog in the evening
with vsby 1 nm or less. 
.fri...w winds 10 to 15 kt, becoming sw 15 to 20 kt in the
afternoon. gusts up to 25 kt. seas 2 to 4 ft. wave detail: sw
3 ft at 4 seconds and sw 2 ft at 8 seconds. 
.fri night...w winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. gusts up to 25 kt. seas 2 to 4 ft. wave detail:
sw 3 ft at 4 seconds and e 1 foot at 8 seconds. 
.sat and sat night...w winds 15 to 20 kt with gusts up to 25 kt.
seas 2 to 4 ft. wave detail: w 3 ft at 4 seconds and s 2 ft at
9 seconds. 
.sun and sun night...sw winds 10 to 15 kt. gusts up to 20 kt.
seas 2 to 3 ft. wave detail: w 2 ft at 3 seconds and s 1 foot at
8 seconds. 
.mon...s winds 15 to 20 kt. seas 2 to 4 ft. showers likely. 
.mon night...sw winds 15 to 20 kt with gusts up to 25 kt. seas
3 to 5 ft. 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 180805
cwfbox
expires:202606182100;;945672

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
405 am edt thu jun 18 2026

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


anz233-182100-
vineyard sound-
405 am edt thu jun 18 2026

...gale warning in effect from 11 am edt this morning through
this evening...

.today...s winds 15 to 20 kt, increasing to 20 to 25 kt this
afternoon. gusts up to 35 kt. seas 2 to 4 ft, building to 4 to
6 ft this afternoon. wave detail: sw 3 ft at 5 seconds and e
1 foot at 8 seconds, becoming sw 6 ft at 7 seconds and e 2 ft at
10 seconds. patchy fog this afternoon. a slight chance of showers
and tstms this afternoon with vsby 1 nm or less. 
.tonight...sw winds 20 to 25 kt with gusts up to 35 kt,
diminishing to 15 to 20 kt with gusts up to 25 kt after midnight.
seas 4 to 6 ft. wave detail: sw 6 ft at 7 seconds and sw 4 ft at
4 seconds. patchy fog. vsby 1 nm or less in the evening. 
.fri...w 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: sw
4 ft at 8 seconds and sw 3 ft at 5 seconds. 
.fri night...sw winds 15 to 20 kt, becoming w 10 to 15 kt after
midnight. gusts up to 25 kt. seas 3 to 5 ft. wave detail: sw 4 ft
at 8 seconds and nw 1 foot at 5 seconds. 
.sat and sat night...w 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 sw 4 ft at
9 seconds. 
.sun...w winds 10 to 15 kt with gusts up to 20 kt. seas 2 to
3 ft. wave detail: sw 3 ft at 6 seconds and sw 3 ft at 7 seconds.
.sun night...sw winds 10 to 15 kt with gusts up to 20 kt. seas
2 to 3 ft. a chance of showers. 
.mon...s winds 10 to 15 kt with gusts up to 20 kt. seas 2 to
4 ft. showers likely. 
.mon night...sw winds 15 to 20 kt with gusts up to 25 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 180805
cwfbox
expires:202606182100;;945673

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
405 am edt thu jun 18 2026

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


anz234-182100-
buzzards bay-
405 am edt thu jun 18 2026

...gale warning in effect from 11 am edt this morning through
this evening...

.today...s winds 15 to 20 kt, increasing to 20 to 25 kt this
afternoon. gusts up to 35 kt. seas 2 to 3 ft, building to 3 to
5 ft this afternoon. wave detail: s 3 ft at 4 seconds and s
1 foot at 7 seconds, becoming sw 5 ft at 7 seconds and s 4 ft at
4 seconds. patchy fog this afternoon. a slight chance of showers
and tstms this afternoon with vsby 1 nm or less. 
.tonight...sw winds 20 to 25 kt with gusts up to 35 kt,
diminishing to 10 to 15 kt with gusts up to 20 kt after midnight.
seas 3 to 5 ft. wave detail: sw 5 ft at 7 seconds and sw 4 ft at
5 seconds. patchy fog in the evening with vsby 1 to 3 nm. 
.fri...w winds 10 to 15 kt, becoming sw 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 s 2 ft at 7 seconds. 
.fri night...sw 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: w 3 ft
at 5 seconds and sw 2 ft at 8 seconds. 
.sat and sat night...w 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 sw 2 ft at
10 seconds. 
.sun...w winds 10 to 15 kt with gusts up to 20 kt. seas 2 to
3 ft. wave detail: w 2 ft at 4 seconds and s 2 ft at 7 seconds. 
.sun night...sw winds 10 to 15 kt with gusts up to 20 kt. seas
around 2 ft. a chance of showers. 
.mon and mon night...s winds 10 to 15 kt, becoming sw 15 to
20 kt. seas 2 to 4 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 180805
cwfbox
expires:202606182100;;945674

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
405 am edt thu jun 18 2026

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


anz235-182100-
rhode island sound-
405 am edt thu jun 18 2026

...small craft advisory in effect from 11 am edt this morning
through friday evening...

.today...s winds 20 to 25 kt with gusts up to 35 kt. seas 3 to
5 ft, building to 5 to 7 ft this afternoon. wave detail: s 5 ft
at 6 seconds and se 2 ft at 7 seconds, becoming s 7 ft at
7 seconds and nw 3 ft at 7 seconds. patchy fog. a slight chance
of showers and tstms this afternoon. vsby 1 to 3 nm, decreasing
to 1 nm or less this afternoon. 
.tonight...sw winds 20 to 25 kt, becoming w 15 to 20 kt after
midnight. gusts up to 30 kt. seas 5 to 7 ft. wave detail: w 7 ft
at 7 seconds and e 3 ft at 7 seconds. patchy fog in the evening
with vsby 1 nm or less. 
.fri...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 e 2 ft at 8 seconds. 
.fri night...sw winds 15 to 20 kt, becoming w 10 to 15 kt after
midnight. gusts up to 25 kt. seas 4 to 6 ft. wave detail: sw 6 ft
at 6 seconds and e 2 ft at 8 seconds. 
.sat and sat night...w winds 15 to 20 kt with gusts up to 25 kt.
seas 3 to 5 ft. wave detail: w 5 ft at 6 seconds and sw 5 ft at
9 seconds. 
.sun and sun night...sw winds 10 to 15 kt with gusts up to 20 kt.
seas 2 to 3 ft. wave detail: w 3 ft at 4 seconds and sw 3 ft at
8 seconds. 
.mon...s winds 15 to 20 kt. seas 2 to 4 ft. showers likely. 
.mon night...sw winds 15 to 20 kt with gusts up to 25 kt. seas
4 to 6 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 180805
cwfbox
expires:202606182100;;945677

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
405 am edt thu jun 18 2026

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


anz236-182100-
narragansett bay-
405 am edt thu jun 18 2026

...small craft advisory in effect from 11 am edt this morning
through this evening...

.today...s winds 15 to 20 kt, increasing to 20 to 25 kt this
afternoon. gusts up to 30 kt. waves 2 to 3 ft, building to 3 to
5 ft this afternoon. patchy fog. a chance of showers with a
slight chance of tstms this afternoon. vsby 1 to 3 nm, decreasing
to 1 nm or less this afternoon. 
.tonight...sw winds 15 to 20 kt with gusts up to 30 kt, becoming
w 10 to 15 kt with gusts up to 20 kt after midnight. waves 2 to
4 ft. patchy fog in the evening with vsby 1 to 3 nm. 
.fri...w winds 10 to 15 kt with gusts up to 25 kt. waves 2 to
4 ft. 
.fri night...w winds 10 to 15 kt. gusts up to 20 kt in the
evening. waves 2 to 4 ft. 
.sat and sat night...w winds 10 to 15 kt with gusts up to 20 kt.
waves 2 to 3 ft. 
.sun...w winds 10 to 15 kt with gusts up to 20 kt. waves around
2 ft. 
.sun night...sw winds 5 to 10 kt. waves around 2 ft. a chance of
showers. 
.mon and mon night...s winds 10 to 15 kt, becoming sw. gusts up
to 20 kt. waves 2 to 4 ft. showers likely.  

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 180805
cwfbox
expires:202606182100;;945665

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
405 am edt thu jun 18 2026

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


anz250-182100-
coastal waters east of ipswich bay and the stellwagen bank
national marine sanctuary-
405 am edt thu jun 18 2026

...gale warning in effect from 11 am edt this morning through
this evening...

.today...s winds 15 to 20 kt with gusts up to 25 kt, increasing
to 20 to 25 kt with gusts up to 40 kt this afternoon. seas 2 to
4 ft, building to 4 to 6 ft this afternoon. wave detail: s 4 ft
at 4 seconds and w 1 foot at 7 seconds, becoming se 6 ft at
6 seconds and w 1 foot at 7 seconds. a slight chance of showers
this morning, then a chance of showers with a slight chance of
tstms this afternoon. patchy fog this afternoon with vsby 1 to
3 nm. 
.tonight...sw winds 20 to 25 kt with gusts up to 35 kt,
diminishing to 10 to 15 kt with gusts up to 20 kt after midnight.
seas 4 to 6 ft. wave detail: s 6 ft at 6 seconds and w 2 ft at
5 seconds. patchy fog. vsby 1 to 3 nm in the evening. 
.fri...sw winds 10 to 15 kt with gusts up to 20 kt. seas 2 to
4 ft. wave detail: se 3 ft at 7 seconds and sw 2 ft at 4 seconds.
.fri night...w winds 10 to 15 kt with gusts up to 25 kt. seas
2 to 4 ft. wave detail: w 3 ft at 4 seconds and sw 3 ft at
4 seconds. 
.sat and sat night...w winds 10 to 15 kt with gusts up to 25 kt.
seas 2 to 4 ft. wave detail: w 3 ft at 4 seconds and sw 2 ft at
4 seconds. 
.sun and sun night...sw winds 5 to 10 kt. seas around 2 ft. wave
detail: w 2 ft at 4 seconds and se 1 foot at 9 seconds. 
.mon...s winds 10 to 15 kt with gusts up to 20 kt. seas 2 to
4 ft. showers likely. 
.mon night...sw winds 10 to 15 kt with gusts up to 20 kt. seas
4 to 6 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 180805
cwfbox
expires:202606182100;;945668

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
405 am edt thu jun 18 2026

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


anz254-182100-
coastal waters from provincetown ma to chatham ma to nantucket ma
out 20 nm-
405 am edt thu jun 18 2026

...small craft advisory in effect from 1 pm edt this afternoon
through friday evening...

.today...s winds 15 to 20 kt, increasing to 20 to 25 kt this
afternoon. gusts up to 30 kt. seas 2 to 4 ft, building to 4 to
6 ft this afternoon. wave detail: s 3 ft at 6 seconds and e
1 foot at 8 seconds, becoming se 6 ft at 6 seconds and w 1 foot
at 8 seconds. patchy fog. a slight chance of showers this
afternoon. vsby 1 nm or less, increasing to 1 to 3 nm this
afternoon. 
.tonight...sw winds 20 to 25 kt with gusts up to 35 kt,
diminishing to 15 to 20 kt with gusts up to 25 kt after midnight.
seas 4 to 6 ft. wave detail: sw 6 ft at 7 seconds and sw 3 ft at
4 seconds. patchy fog. vsby 1 nm or less in the evening. 
.fri...w winds 10 to 15 kt, becoming sw 15 to 20 kt in the
afternoon. gusts up to 25 kt. seas 4 to 6 ft. wave detail: s 5 ft
at 8 seconds and w 3 ft at 5 seconds. 
.fri night...w winds 15 to 20 kt with gusts up to 25 kt. seas
4 to 6 ft. wave detail: s 5 ft at 8 seconds and w 4 ft at
4 seconds. 
.sat and sat night...w winds 15 to 20 kt with gusts up to 25 kt.
seas 3 to 5 ft. wave detail: s 5 ft at 9 seconds and w 4 ft at
5 seconds. 
.sun and sun night...sw winds 5 to 10 kt. seas 2 to 4 ft. wave
detail: s 3 ft at 8 seconds and w 2 ft at 4 seconds. 
.mon...s winds 10 to 15 kt with gusts up to 20 kt. seas 3 to
5 ft. showers likely. 
.mon night...sw winds 15 to 20 kt with gusts up to 25 kt. seas
5 to 7 ft. 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 180805
cwfbox
expires:202606182100;;945669

coastal waters forecast for massachusetts and rhode island
national weather service boston/norton ma
405 am edt thu jun 18 2026

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


anz255-182100-
coastal waters extending out to 25 nm south of marthas vineyard
and nantucket-
405 am edt thu jun 18 2026

...small craft advisory in effect from 11 am edt this morning
through friday evening...

.today...s winds 15 to 20 kt, increasing to 20 to 25 kt this
afternoon. gusts up to 30 kt. seas 3 to 5 ft, building to 5 to
7 ft this afternoon. wave detail: sw 4 ft at 7 seconds and s 3 ft
at 4 seconds, becoming s 7 ft at 7 seconds and nw 1 foot at
7 seconds. patchy fog. vsby 1 nm or less. 
.tonight...sw winds 20 to 25 kt, diminishing to 15 to 20 kt after
midnight. gusts up to 30 kt. seas 5 to 8 ft. wave detail: s 8 ft
at 7 seconds and nw 5 ft at 8 seconds. patchy fog. vsby 1 nm or
less in the evening. 
.fri...w winds 15 to 20 kt with gusts up to 25 kt. seas 5 to
7 ft. wave detail: sw 6 ft at 7 seconds and w 3 ft at 4 seconds. 
.fri night...w winds 15 to 20 kt with gusts up to 25 kt. seas
5 to 7 ft. wave detail: nw 7 ft at 4 seconds and sw 6 ft at
8 seconds. 
.sat and sat night...w winds 15 to 20 kt with gusts up to 25 kt.
seas 4 to 6 ft. wave detail: sw 6 ft at 9 seconds and sw 5 ft at
6 seconds. 
.sun and sun night...sw winds 10 to 15 kt with gusts up to 20 kt.
seas 2 to 4 ft. wave detail: sw 4 ft at 8 seconds and nw 2 ft at
4 seconds. 
.mon...s winds 15 to 20 kt with gusts up to 25 kt. seas 4 to
6 ft. showers likely. 
.mon night...sw winds 20 to 25 kt. seas 5 to 7 ft. 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.

$$