177
FZUS51 KBOX 171405
CWFBOX
COASTAL WATERS FORECAST FOR MASSACHUSETTS AND RHODE ISLAND
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
1005 AM EDT FRI APR 17 2026
COASTAL WATERS FROM THE MERRIMACK RIVER MA TO WATCH HILL RI OUT
TO 25 NM
ANZ200-180300-
1005 AM EDT FRI APR 17 2026
SYNOPSIS FOR MASSACHUSETTS AND RHODE ISLAND COASTAL WATERS
COLD FRONT MOVES ACROSS THE WATERS EARLY TODAY BRINGING RAIN
SHOWERS, WITH RETURNING NORTHEAST WINDS ON ALL WATERS THIS AFTN
THROUGH SAT. A STRONG COLD FRONT THEN MOVES OVER THE WATERS ON SUN.
ANZ250-180300-
COASTAL WATERS EAST OF IPSWICH BAY AND THE STELLWAGEN BANK
NATIONAL MARINE SANCTUARY-
1005 AM EDT FRI APR 17 2026
THIS AFTERNOON
N WINDS 5 TO 10 KT, BECOMING NE 10 TO 15 KT.
SEAS AROUND 2 FT. WAVE DETAIL: NE 2 FT AT 5 SECONDS AND SE 2 FT
AT 8 SECONDS. PATCHY FOG. A SLIGHT CHANCE OF RAIN. VSBY 1 NM OR
LESS.
TONIGHT
NE WINDS 5 TO 10 KT, INCREASING TO 10 TO 15 KT AFTER
MIDNIGHT. SEAS AROUND 2 FT. WAVE DETAIL: N 2 FT AT 4 SECONDS AND
SE 2 FT AT 8 SECONDS. PATCHY FOG. VSBY 1 TO 3 NM.
SAT
NE WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE MORNING.
SEAS 2 TO 3 FT. WAVE DETAIL: NE 3 FT AT 4 SECONDS AND SE 2 FT AT
8 SECONDS. PATCHY FOG IN THE MORNING WITH VSBY 1 TO 3 NM.
SAT NIGHT
E WINDS 5 TO 10 KT, BECOMING S AFTER MIDNIGHT. SEAS
2 TO 4 FT. WAVE DETAIL: E 4 FT AT 7 SECONDS AND N 1 FOOT AT
3 SECONDS. PATCHY FOG IN THE EVENING.
SUN
S WINDS 10 TO 15 KT, BECOMING SW WITH GUSTS UP TO 20 KT IN
THE AFTERNOON. SEAS 3 TO 4 FT. WAVE DETAIL: SE 4 FT AT 7 SECONDS
AND SW 2 FT AT 3 SECONDS. A CHANCE OF SHOWERS IN THE MORNING,
THEN SHOWERS IN THE AFTERNOON.
SUN NIGHT
NW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS
4 TO 5 FT. WAVE DETAIL: NW 4 FT AT 4 SECONDS AND E 3 FT AT
8 SECONDS. SHOWERS LIKELY, MAINLY IN THE EVENING.
MON AND MON NIGHT
NW WINDS 15 TO 20 KT. SEAS 3 TO 5 FT.
TUE AND TUE NIGHT
N WINDS 10 TO 15 KT, BECOMING S 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.
ANZ251-180300-
MASSACHUSETTS BAY AND IPSWICH BAY-
1005 AM EDT FRI APR 17 2026
THIS AFTERNOON
N WINDS 5 TO 10 KT, BECOMING NE 10 TO 15 KT.
SEAS 1 FOOT OR LESS, THEN AROUND 2 FT. WAVE DETAIL: SE 1 FOOT AT
3 SECONDS AND E 1 FOOT AT 6 SECONDS, BECOMING NE 2 FT AT
5 SECONDS AND N 1 FOOT AT 2 SECONDS. PATCHY FOG. A SLIGHT CHANCE
OF RAIN. VSBY 1 NM OR LESS.
TONIGHT
N WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: N
2 FT AT 4 SECONDS AND SE 1 FOOT AT 8 SECONDS. PATCHY FOG. VSBY
1 TO 3 NM IN THE EVENING.
SAT
NE WINDS 10 TO 15 KT. SEAS AROUND 2 FT. WAVE DETAIL: NE
2 FT AT 4 SECONDS AND SE 1 FOOT AT 9 SECONDS. PATCHY FOG. VSBY
1 TO 3 NM IN THE MORNING.
SAT NIGHT
E WINDS 5 TO 10 KT, BECOMING SE AFTER MIDNIGHT. SEAS
2 TO 3 FT. WAVE DETAIL: E 3 FT AT 7 SECONDS AND N 1 FOOT AT
3 SECONDS. PATCHY FOG IN THE EVENING.
SUN AND SUN NIGHT
W WINDS 15 TO 20 KT. SEAS 2 TO 4 FT. WAVE
DETAIL: E 4 FT AT 8 SECONDS AND W 3 FT AT 3 SECONDS. A CHANCE OF
SHOWERS IN THE MORNING, THEN SHOWERS THROUGH THE NIGHT.
MON THROUGH TUE NIGHT
S WINDS 15 TO 20 KT. SEAS 2 TO 3 FT.
WAVE DETAIL: S 3 FT AT 4 SECONDS AND NW 3 FT AT 4 SECONDS.
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.
ANZ231-180300-
CAPE COD BAY-
1005 AM EDT FRI APR 17 2026
THIS AFTERNOON
N WINDS 5 TO 10 KT. SEAS 1 FOOT OR LESS, THEN
AROUND 2 FT. WAVE DETAIL: SW 1 FOOT AT 3 SECONDS AND E 1 FOOT AT
5 SECONDS, BECOMING NW 1 FOOT AT 2 SECONDS AND NE 1 FOOT AT
5 SECONDS. PATCHY FOG. A CHANCE OF RAIN. A SLIGHT CHANCE OF RAIN.
VSBY 1 NM OR LESS.
TONIGHT
NE WINDS 5 TO 10 KT. SEAS 1 FOOT OR LESS. WAVE DETAIL:
N 1 FOOT AT 3 SECONDS AND S 1 FOOT AT 8 SECONDS. PATCHY FOG. VSBY
1 TO 3 NM.
SAT
NE WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: N
1 FOOT AT 3 SECONDS AND S 1 FOOT AT 8 SECONDS. PATCHY FOG. VSBY
1 TO 3 NM IN THE MORNING.
SAT NIGHT
NE WINDS AROUND 5 KT, BECOMING S AFTER MIDNIGHT.
SEAS AROUND 2 FT. WAVE DETAIL: NE 1 FOOT AT 4 SECONDS AND S
1 FOOT AT 7 SECONDS. PATCHY FOG IN THE EVENING.
SUN
S WINDS 5 TO 10 KT, BECOMING SW 10 TO 15 KT WITH GUSTS UP
TO 20 KT IN THE AFTERNOON. SEAS 2 TO 3 FT. WAVE DETAIL: NE 2 FT
AT 5 SECONDS AND SW 2 FT AT 5 SECONDS. A CHANCE OF SHOWERS IN THE
MORNING, THEN SHOWERS LIKELY IN THE AFTERNOON.
SUN NIGHT
NW WINDS AROUND 15 KT WITH GUSTS UP TO 20 KT. SEAS
2 TO 3 FT. WAVE DETAIL: NW 2 FT AT 4 SECONDS AND NE 1 FOOT AT
6 SECONDS. SHOWERS LIKELY, MAINLY IN THE EVENING.
MON THROUGH TUE NIGHT
SW 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.
ANZ254-180300-
COASTAL WATERS FROM PROVINCETOWN MA TO CHATHAM MA TO NANTUCKET MA
OUT 20 NM-
1005 AM EDT FRI APR 17 2026
THIS AFTERNOON
NW WINDS 5 TO 10 KT, BECOMING N. SEAS 2 TO
4 FT. WAVE DETAIL: S 3 FT AT 7 SECONDS AND W 1 FOOT AT 3 SECONDS.
PATCHY FOG. A CHANCE OF RAIN. VSBY 1 NM OR LESS.
TONIGHT
NE WINDS AROUND 10 KT. SEAS 2 TO 4 FT. WAVE DETAIL: S
3 FT AT 7 SECONDS AND N 2 FT AT 4 SECONDS. PATCHY FOG. VSBY 1 NM
OR LESS, INCREASING TO 1 TO 3 NM AFTER MIDNIGHT.
SAT
NE WINDS 10 TO 15 KT, DIMINISHING TO 5 TO 10 KT IN THE
AFTERNOON. SEAS 2 TO 4 FT. WAVE DETAIL: NE 4 FT AT 6 SECONDS AND
S 3 FT AT 7 SECONDS. PATCHY FOG. VSBY 1 TO 3 NM IN THE MORNING.
SAT NIGHT
NE WINDS 5 TO 10 KT, BECOMING S AFTER MIDNIGHT. SEAS
3 TO 4 FT. WAVE DETAIL: E 4 FT AT 7 SECONDS AND S 2 FT AT
7 SECONDS. PATCHY FOG IN THE EVENING.
SUN
S WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE AFTERNOON.
SEAS 3 TO 5 FT. WAVE DETAIL: E 4 FT AT 7 SECONDS AND SW 3 FT AT
5 SECONDS. SHOWERS LIKELY IN THE AFTERNOON.
SUN NIGHT
NW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS
4 TO 5 FT. WAVE DETAIL: W 3 FT AT 4 SECONDS AND S 3 FT AT
6 SECONDS. SHOWERS LIKELY, MAINLY IN THE EVENING.
MON
NW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 3 TO
5 FT.
MON NIGHT THROUGH TUE NIGHT
SW 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.
ANZ255-180300-
COASTAL WATERS EXTENDING OUT TO 25 NM SOUTH OF MARTHAS VINEYARD
AND NANTUCKET-
1005 AM EDT FRI APR 17 2026
THIS AFTERNOON
W WINDS 5 TO 10 KT, BECOMING N. SEAS 3 TO 5 FT.
WAVE DETAIL: S 4 FT AT 7 SECONDS AND N 2 FT AT 6 SECONDS. PATCHY
FOG. A CHANCE OF RAIN THIS MORNING. VSBY 1 NM OR LESS.
TONIGHT
NE WINDS 10 TO 15 KT. SEAS 3 TO 4 FT. WAVE DETAIL: S
4 FT AT 7 SECONDS AND N 1 FOOT AT 3 SECONDS. PATCHY FOG. A CHANCE
OF RAIN. VSBY 1 NM OR LESS, INCREASING TO 1 TO 3 NM AFTER
MIDNIGHT.
SAT
NE WINDS 10 TO 15 KT. SEAS 2 TO 3 FT. WAVE DETAIL: S 3 FT
AT 7 SECONDS AND N 2 FT AT 4 SECONDS. PATCHY FOG IN THE MORNING
WITH VSBY 1 TO 3 NM.
SAT NIGHT
NE WINDS 5 TO 10 KT, BECOMING S AFTER MIDNIGHT. SEAS
2 TO 3 FT. WAVE DETAIL: E 3 FT AT 7 SECONDS AND S 2 FT AT
7 SECONDS. PATCHY FOG IN THE EVENING.
SUN
S WINDS 10 TO 15 KT, BECOMING SW 15 TO 20 KT IN THE
AFTERNOON. SEAS 3 TO 5 FT. WAVE DETAIL: SW 4 FT AT 4 SECONDS AND
E 3 FT AT 7 SECONDS. SHOWERS LIKELY IN THE AFTERNOON.
SUN NIGHT
NW WINDS 20 TO 25 KT, DIMINISHING TO 15 TO 20 KT
AFTER MIDNIGHT. SEAS 4 TO 6 FT. WAVE DETAIL: W 5 FT AT 6 SECONDS
AND E 3 FT AT 7 SECONDS. SHOWERS LIKELY, MAINLY IN THE EVENING.
MON
W WINDS 15 TO 20 KT. SEAS 4 TO 6 FT.
MON NIGHT AND TUE
NW WINDS 15 TO 20 KT. SEAS 2 TO 4 FT.
TUE NIGHT
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS
3 TO 5 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.
ANZ256-180300-
COASTAL WATERS FROM MONTAUK NY TO MARTHAS VINEYARD EXTENDING OUT
TO 20 NM SOUTH OF BLOCK ISLAND-
1005 AM EDT FRI APR 17 2026
THIS AFTERNOON
NW WINDS 5 TO 10 KT, BECOMING N. SEAS 4 TO
5 FT. WAVE DETAIL: SE 5 FT AT 7 SECONDS AND N 2 FT AT 4 SECONDS.
PATCHY FOG. A CHANCE OF RAIN. VSBY 1 NM OR LESS.
TONIGHT
NE WINDS 10 TO 15 KT. SEAS 3 TO 4 FT. WAVE DETAIL: S
4 FT AT 7 SECONDS AND N 2 FT AT 4 SECONDS. PATCHY FOG. VSBY 1 NM
OR LESS IN THE EVENING.
SAT
NE WINDS 10 TO 15 KT. SEAS 2 TO 3 FT. WAVE DETAIL: S 3 FT
AT 7 SECONDS AND N 2 FT AT 4 SECONDS. PATCHY FOG IN THE MORNING
WITH VSBY 1 TO 3 NM.
SAT NIGHT
E WINDS 5 TO 10 KT, BECOMING SE AFTER MIDNIGHT. SEAS
2 TO 3 FT. WAVE DETAIL: NE 2 FT AT 4 SECONDS AND S 2 FT AT
7 SECONDS.
SUN
S WINDS 10 TO 15 KT, BECOMING W 15 TO 20 KT IN THE
AFTERNOON. SEAS 2 TO 4 FT. WAVE DETAIL: SW 4 FT AT 5 SECONDS AND
E 2 FT AT 7 SECONDS. A CHANCE OF SHOWERS IN THE MORNING, THEN
SHOWERS LIKELY IN THE AFTERNOON.
SUN NIGHT
NW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS
4 TO 5 FT. WAVE DETAIL: W 4 FT AT 5 SECONDS AND SE 3 FT AT
7 SECONDS. SHOWERS LIKELY IN THE EVENING.
MON AND MON NIGHT
W WINDS 15 TO 20 KT, BECOMING NW. SEAS 3 TO
5 FT.
TUE
NW WINDS 15 TO 20 KT. SEAS 2 TO 3 FT.
TUE NIGHT
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS
3 TO 5 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.
ANZ232-180300-
NANTUCKET SOUND-
1005 AM EDT FRI APR 17 2026
THIS AFTERNOON
NW WINDS 5 TO 10 KT, BECOMING N. SEAS AROUND
2 FT. WAVE DETAIL: NW 2 FT AT 7 SECONDS AND E 1 FOOT AT
7 SECONDS. PATCHY FOG. A CHANCE OF RAIN. VSBY 1 TO 3 NM,
DECREASING TO 1 NM OR LESS.
TONIGHT
NE WINDS AROUND 10 KT. SEAS AROUND 2 FT. WAVE DETAIL:
N 1 FOOT AT 4 SECONDS AND S 1 FOOT AT 7 SECONDS. PATCHY FOG. VSBY
1 NM OR LESS, INCREASING TO 1 TO 3 NM AFTER MIDNIGHT.
SAT
NE WINDS 10 TO 15 KT. SEAS AROUND 2 FT. WAVE DETAIL: N
2 FT AT 4 SECONDS AND S 1 FOOT AT 7 SECONDS. PATCHY FOG. VSBY
1 TO 3 NM IN THE MORNING.
SAT NIGHT
NE WINDS 5 TO 10 KT, BECOMING S AFTER MIDNIGHT. SEAS
AROUND 2 FT. WAVE DETAIL: E 2 FT AT 7 SECONDS AND N 1 FOOT AT
3 SECONDS. PATCHY FOG IN THE EVENING.
SUN
S WINDS 10 TO 15 KT, BECOMING SW WITH GUSTS UP TO 20 KT IN
THE AFTERNOON. SEAS 2 TO 3 FT. WAVE DETAIL: SW 2 FT AT 3 SECONDS
AND S 2 FT AT 6 SECONDS. SHOWERS LIKELY IN THE AFTERNOON.
SUN NIGHT
NW WINDS 15 TO 20 KT. SEAS 2 TO 3 FT. WAVE DETAIL:
SW 3 FT AT 5 SECONDS AND E 2 FT AT 7 SECONDS. SHOWERS LIKELY,
MAINLY IN THE EVENING.
MON THROUGH TUE NIGHT
SW 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.
ANZ233-180300-
VINEYARD SOUND-
1005 AM EDT FRI APR 17 2026
THIS AFTERNOON
NW WINDS AROUND 5 KT, BECOMING N. SEAS 2 TO
3 FT. WAVE DETAIL: SW 3 FT AT 7 SECONDS AND W 1 FOOT AT
3 SECONDS. A CHANCE OF RAIN THIS MORNING. PATCHY FOG WITH VSBY
1 TO 3 NM.
TONIGHT
NE WINDS AROUND 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: SW
3 FT AT 7 SECONDS AND N 1 FOOT AT 4 SECONDS. PATCHY FOG. VSBY
1 TO 3 NM IN THE EVENING.
SAT
NE WINDS 10 TO 15 KT. SEAS AROUND 2 FT. WAVE DETAIL: SW
2 FT AT 7 SECONDS AND N 1 FOOT AT 4 SECONDS. PATCHY FOG IN THE
MORNING WITH VSBY 1 TO 3 NM.
SAT NIGHT
NE WINDS 5 TO 10 KT, BECOMING SE AFTER MIDNIGHT.
SEAS AROUND 2 FT. WAVE DETAIL: NE 1 FOOT AT 3 SECONDS AND S
1 FOOT AT 6 SECONDS. PATCHY FOG IN THE EVENING.
SUN
S WINDS 10 TO 15 KT, BECOMING SW 15 TO 20 KT IN THE
AFTERNOON. SEAS 2 TO 3 FT. WAVE DETAIL: S 3 FT AT 5 SECONDS AND E
1 FOOT AT 8 SECONDS. A CHANCE OF SHOWERS IN THE MORNING, THEN
SHOWERS LIKELY IN THE AFTERNOON.
SUN NIGHT
NW WINDS 15 TO 20 KT. SEAS 2 TO 3 FT. WAVE DETAIL:
SW 3 FT AT 6 SECONDS AND E 1 FOOT AT 8 SECONDS. SHOWERS LIKELY,
MAINLY IN THE EVENING.
MON THROUGH TUE
NW WINDS 15 TO 20 KT. SEAS 2 TO 3 FT.
TUE NIGHT
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS
3 TO 5 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.
ANZ234-180300-
BUZZARDS BAY-
1005 AM EDT FRI APR 17 2026
THIS AFTERNOON
NW WINDS AROUND 5 KT, BECOMING NE 10 TO 15 KT.
SEAS AROUND 2 FT. WAVE DETAIL: SW 2 FT AT 5 SECONDS AND SE 1 FOOT
AT 8 SECONDS. A CHANCE OF RAIN THIS MORNING. PATCHY FOG WITH VSBY
1 TO 3 NM.
TONIGHT
NE WINDS AROUND 10 KT. SEAS AROUND 2 FT. WAVE DETAIL:
N 2 FT AT 3 SECONDS AND SW 2 FT AT 7 SECONDS. PATCHY FOG. VSBY
1 TO 3 NM IN THE EVENING.
SAT
NE WINDS AROUND 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: N
1 FOOT AT 4 SECONDS AND SW 1 FOOT AT 7 SECONDS. PATCHY FOG IN THE
MORNING WITH VSBY 1 TO 3 NM.
SAT NIGHT
NE WINDS 5 TO 10 KT, BECOMING SE AFTER MIDNIGHT.
SEAS AROUND 2 FT IN THE EVENING, THEN 1 FOOT OR LESS. WAVE
DETAIL: N 1 FOOT AT 3 SECONDS AND S 1 FOOT AT 6 SECONDS, BECOMING
NE 1 FOOT AT 4 SECONDS AND S 1 FOOT AT 6 SECONDS. PATCHY FOG IN
THE EVENING.
SUN
S WINDS 10 TO 15 KT, BECOMING SW WITH GUSTS UP TO 20 KT IN
THE AFTERNOON. SEAS AROUND 2 FT. WAVE DETAIL: SW 2 FT AT
4 SECONDS AND E 1 FOOT AT 9 SECONDS. A CHANCE OF SHOWERS IN THE
MORNING, THEN SHOWERS IN THE AFTERNOON.
SUN NIGHT
NW WINDS 15 TO 20 KT. SEAS 2 TO 3 FT. WAVE DETAIL: S
3 FT AT 5 SECONDS AND NW 2 FT AT 4 SECONDS. SHOWERS LIKELY,
MAINLY IN THE EVENING.
MON THROUGH TUE
NW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS AROUND 2 FT.
TUE NIGHT
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 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.
ANZ235-180300-
RHODE ISLAND SOUND-
1005 AM EDT FRI APR 17 2026
THIS AFTERNOON
NW WINDS 5 TO 10 KT, BECOMING N 10 TO 15 KT.
SEAS 3 TO 4 FT. WAVE DETAIL: S 4 FT AT 7 SECONDS AND E 2 FT AT
9 SECONDS. A CHANCE OF RAIN. PATCHY FOG WITH VSBY 1 NM OR LESS.
TONIGHT
NE WINDS 10 TO 15 KT. SEAS 2 TO 4 FT. WAVE DETAIL: S
4 FT AT 7 SECONDS AND NE 2 FT AT 5 SECONDS. PATCHY FOG. VSBY 1 TO
3 NM IN THE EVENING.
SAT
NE WINDS 10 TO 15 KT. SEAS 2 TO 3 FT. WAVE DETAIL: S 3 FT
AT 7 SECONDS AND N 2 FT AT 4 SECONDS. PATCHY FOG IN THE MORNING
WITH VSBY 1 TO 3 NM.
SAT NIGHT
E WINDS 5 TO 10 KT, BECOMING SE AFTER MIDNIGHT. SEAS
AROUND 2 FT. WAVE DETAIL: NE 2 FT AT 3 SECONDS AND S 2 FT AT
7 SECONDS.
SUN AND SUN NIGHT
NW WINDS 15 TO 20 KT. SEAS 2 TO 4 FT. WAVE
DETAIL: W 3 FT AT 4 SECONDS AND SE 3 FT AT 7 SECONDS. A CHANCE OF
SHOWERS IN THE MORNING, THEN SHOWERS THROUGH THE NIGHT.
MON AND MON NIGHT
W WINDS 15 TO 20 KT, BECOMING NW. SEAS 2 TO
4 FT. WAVE DETAIL: W 3 FT AT 4 SECONDS AND S 2 FT AT 7 SECONDS.
TUE
NW WINDS 15 TO 20 KT. SEAS AROUND 2 FT.
TUE NIGHT
SW WINDS 20 TO 25 KT. SEAS 3 TO 5 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.
ANZ237-180300-
BLOCK ISLAND SOUND-
1005 AM EDT FRI APR 17 2026
THIS AFTERNOON
NW WINDS 5 TO 10 KT. SEAS 2 TO 4 FT. WAVE
DETAIL: S 4 FT AT 7 SECONDS AND NW 1 FOOT AT 2 SECONDS. PATCHY
FOG. A SLIGHT CHANCE OF RAIN, THEN A CHANCE OF RAIN WITH VSBY
1 NM OR LESS.
TONIGHT
NE WINDS 5 TO 10 KT. SEAS 2 TO 4 FT. WAVE DETAIL: S
4 FT AT 7 SECONDS AND N 2 FT AT 4 SECONDS. PATCHY FOG. VSBY 1 TO
3 NM IN THE EVENING.
SAT
NE WINDS AROUND 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: S 3 FT
AT 7 SECONDS AND N 1 FOOT AT 4 SECONDS. PATCHY FOG IN THE
MORNING.
SAT NIGHT
E WINDS 5 TO 10 KT, BECOMING SE AFTER MIDNIGHT. SEAS
AROUND 2 FT. WAVE DETAIL: S 2 FT AT 7 SECONDS AND NE 1 FOOT AT
4 SECONDS.
SUN AND SUN NIGHT
NW 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 SE 2 FT AT
6 SECONDS. A CHANCE OF SHOWERS IN THE MORNING, THEN SHOWERS
THROUGH THE NIGHT.
MON THROUGH TUE NIGHT
SW WINDS 15 TO 20 KT. SEAS 2 TO 4 FT.
WAVE DETAIL: SW 3 FT AT 5 SECONDS AND E 1 FOOT AT 8 SECONDS.
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.
ANZ230-180300-
BOSTON HARBOR-
1005 AM EDT FRI APR 17 2026
THIS AFTERNOON
NE WINDS 5 TO 10 KT, INCREASING TO 10 TO 15 KT.
WAVES 1 FOOT OR LESS, THEN AROUND 2 FT. PATCHY FOG. A SLIGHT
CHANCE OF RAIN. VSBY 1 TO 3 NM, DECREASING TO 1 NM OR LESS.
TONIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FOOT OR LESS. PATCHY FOG.
VSBY 1 TO 3 NM.
SAT
NE WINDS AROUND 10 KT. WAVES 1 FOOT OR LESS, THEN AROUND
2 FT IN THE AFTERNOON. PATCHY FOG IN THE MORNING WITH VSBY 1 TO
3 NM.
SAT NIGHT
E WINDS 5 TO 10 KT, BECOMING SE AFTER MIDNIGHT.
WAVES 1 FOOT OR LESS. PATCHY FOG IN THE EVENING.
SUN AND SUN NIGHT
W WINDS 15 TO 20 KT. WAVES AROUND 2 FT.
SHOWERS.
MON THROUGH TUE NIGHT
S 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.
ANZ236-180300-
NARRAGANSETT BAY-
1005 AM EDT FRI APR 17 2026
THIS AFTERNOON
NW WINDS AROUND 5 KT, BECOMING NE. WAVES 2 TO
3 FT. A SLIGHT CHANCE OF RAIN, THEN A CHANCE OF RAIN WITH
ISOLATED TSTMS. PATCHY FOG WITH VSBY 1 TO 3 NM.
TONIGHT
NE WINDS 5 TO 10 KT. WAVES 2 TO 3 FT. PATCHY FOG. VSBY
1 TO 3 NM IN THE EVENING.
SAT
NE WINDS AROUND 10 KT. WAVES AROUND 2 FT. PATCHY FOG IN
THE MORNING WITH VSBY 1 TO 3 NM.
SAT NIGHT
E WINDS 5 TO 10 KT, BECOMING SE AFTER MIDNIGHT.
WAVES AROUND 2 FT.
SUN AND SUN NIGHT
NW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
WAVES 2 TO 3 FT. A CHANCE OF SHOWERS IN THE MORNING, THEN SHOWERS
THROUGH THE NIGHT.
MON THROUGH TUE NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO
20 KT. WAVES 2 TO 3 FT.
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.
ANZ280-180300-
OCEAN WATERS FROM THE MERRIMACK RIVER TO PLYMOUTH FROM 40 TO
60 NM-
1005 AM EDT FRI APR 17 2026
THIS AFTERNOON
N WINDS 10 TO 15 KT. SEAS 2 TO 3 FT. WAVE
DETAIL: S 3 FT AT 7 SECONDS AND NE 2 FT AT 6 SECONDS. PATCHY FOG.
A CHANCE OF RAIN. A SLIGHT CHANCE OF RAIN. VSBY 1 NM OR LESS.
TONIGHT
NE WINDS 10 TO 15 KT. GUSTS UP TO 20 KT AFTER
MIDNIGHT. SEAS 3 TO 4 FT. WAVE DETAIL: S 3 FT AT 8 SECONDS AND N
2 FT AT 4 SECONDS. PATCHY FOG. VSBY 1 TO 3 NM IN THE EVENING.
SAT
NE WINDS 10 TO 15 KT WITH GUSTS UP TO 25 KT. SEAS 3 TO
5 FT. WAVE DETAIL: SE 5 FT AT 7 SECONDS. PATCHY FOG IN THE
MORNING WITH VSBY 1 TO 3 NM.
SAT NIGHT
E WINDS 5 TO 10 KT, BECOMING S AFTER MIDNIGHT. SEAS
4 TO 5 FT. WAVE DETAIL: SE 5 FT AT 7 SECONDS. PATCHY FOG IN THE
EVENING.
SUN
S WINDS 10 TO 15 KT, BECOMING SW 15 TO 20 KT IN THE
AFTERNOON. SEAS 4 TO 5 FT. WAVE DETAIL: E 5 FT AT 8 SECONDS AND S
3 FT AT 7 SECONDS. A CHANCE OF SHOWERS IN THE MORNING, THEN
SHOWERS LIKELY IN THE AFTERNOON.
SUN NIGHT
NW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS
5 TO 6 FT. WAVE DETAIL: W 4 FT AT 4 SECONDS AND SE 3 FT AT
7 SECONDS. SHOWERS LIKELY, MAINLY IN THE EVENING.
MON AND MON NIGHT
NW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT.
SEAS 3 TO 5 FT.
TUE
NW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
4 FT.
TUE NIGHT
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS
3 TO 5 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.
ANZ281-180300-
OCEAN WATERS FROM PROVINCETOWN TO NANTUCKET FROM 20 TO 60 NM-
1005 AM EDT FRI APR 17 2026
THIS AFTERNOON
NW WINDS AROUND 10 KT, BECOMING N. SEAS 4 TO
5 FT. WAVE DETAIL: S 5 FT AT 7 SECONDS AND W 1 FOOT AT 3 SECONDS.
PATCHY FOG. A CHANCE OF RAIN. A SLIGHT CHANCE OF RAIN. VSBY 1 NM
OR LESS.
TONIGHT
NE WINDS 10 TO 15 KT. GUSTS UP TO 20 KT AFTER
MIDNIGHT. SEAS 4 TO 5 FT. WAVE DETAIL: S 5 FT AT 7 SECONDS AND NE
2 FT AT 6 SECONDS. PATCHY FOG. A CHANCE OF RAIN IN THE EVENING.
VSBY 1 NM OR LESS.
SAT
NE WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 4 TO
5 FT. WAVE DETAIL: NE 5 FT AT 7 SECONDS AND S 3 FT AT 7 SECONDS.
PATCHY FOG IN THE MORNING WITH VSBY 1 TO 3 NM.
SAT NIGHT
NE WINDS 5 TO 10 KT, BECOMING SW AFTER MIDNIGHT.
SEAS 4 TO 5 FT. WAVE DETAIL: NE 5 FT AT 7 SECONDS AND S 2 FT AT
7 SECONDS. PATCHY FOG IN THE EVENING.
SUN
S WINDS 10 TO 15 KT, INCREASING TO 15 TO 20 KT IN THE
AFTERNOON. SEAS 4 TO 6 FT. WAVE DETAIL: SW 4 FT AT 6 SECONDS AND
E 4 FT AT 7 SECONDS. A CHANCE OF SHOWERS IN THE AFTERNOON.
SUN NIGHT
NW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS
5 TO 6 FT. WAVE DETAIL: SW 4 FT AT 5 SECONDS AND E 3 FT AT
8 SECONDS. SHOWERS LIKELY, MAINLY IN THE EVENING.
MON
NW WINDS 15 TO 20 KT. SEAS 4 TO 6 FT.
MON NIGHT THROUGH TUE NIGHT
SW WINDS 15 TO 20 KT WITH GUSTS UP
TO 25 KT. SEAS 3 TO 5 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.
ANZ282-180300-
OCEAN WATERS FROM MARTHAS VINEYARD TO NANTUCKET FROM 25 TO 60 NM-
1005 AM EDT FRI APR 17 2026
THIS AFTERNOON
W WINDS AROUND 10 KT, BECOMING NW. SEAS 5 TO
6 FT. WAVE DETAIL: S 6 FT AT 7 SECONDS AND NW 2 FT AT 2 SECONDS.
PATCHY FOG. A SLIGHT CHANCE OF RAIN. VSBY 1 NM OR LESS.
TONIGHT
NE WINDS 5 TO 10 KT. SEAS 3 TO 5 FT. WAVE DETAIL: S
5 FT AT 7 SECONDS AND N 1 FOOT AT 3 SECONDS. PATCHY FOG. A CHANCE
OF RAIN IN THE EVENING. VSBY 1 NM OR LESS, INCREASING TO 1 TO
3 NM AFTER MIDNIGHT.
SAT
NE WINDS 5 TO 10 KT. SEAS 3 TO 4 FT. WAVE DETAIL: S 3 FT
AT 7 SECONDS AND N 2 FT AT 4 SECONDS. PATCHY FOG IN THE MORNING.
SAT NIGHT
NE WINDS 5 TO 10 KT, BECOMING S AFTER MIDNIGHT. SEAS
3 TO 4 FT. WAVE DETAIL: NE 4 FT AT 7 SECONDS AND S 2 FT AT
7 SECONDS.
SUN
S WINDS 10 TO 15 KT, BECOMING SW 15 TO 20 KT IN THE
AFTERNOON. GUSTS UP TO 25 KT. SEAS 3 TO 4 FT, BUILDING TO 4 TO
6 FT IN THE AFTERNOON. WAVE DETAIL: NE 4 FT AT 8 SECONDS AND S
3 FT AT 7 SECONDS, BECOMING SW 4 FT AT 5 SECONDS AND NE 4 FT AT
8 SECONDS. A CHANCE OF SHOWERS IN THE AFTERNOON.
SUN NIGHT
NW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS
5 TO 6 FT. WAVE DETAIL: SW 5 FT AT 6 SECONDS AND E 3 FT AT
8 SECONDS. SHOWERS LIKELY, MAINLY IN THE EVENING.
MON AND MON NIGHT
NW WINDS 15 TO 20 KT. SEAS 4 TO 6 FT.
TUE AND TUE NIGHT
N WINDS 15 TO 20 KT, BECOMING SW. GUSTS UP
TO 25 KT. SEAS 3 TO 5 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.
ANZ283-180300-
OCEAN WATERS FROM MONTAUK NY TO MARTHAS VINEYARD FROM 25 TO 60 NM-
1005 AM EDT FRI APR 17 2026
THIS AFTERNOON
NW WINDS 5 TO 10 KT. SEAS 4 TO 5 FT. WAVE
DETAIL: S 5 FT AT 7 SECONDS AND N 3 FT AT 5 SECONDS. PATCHY FOG.
A SLIGHT CHANCE OF RAIN. VSBY 1 NM OR LESS.
TONIGHT
NE WINDS 10 TO 15 KT. SEAS 3 TO 5 FT. WAVE DETAIL: S
5 FT AT 7 SECONDS AND N 2 FT AT 4 SECONDS. PATCHY FOG. VSBY 1 NM
OR LESS IN THE EVENING.
SAT
NE WINDS 10 TO 15 KT. SEAS 3 TO 4 FT. WAVE DETAIL: S 3 FT
AT 7 SECONDS AND N 2 FT AT 4 SECONDS. PATCHY FOG IN THE MORNING.
SAT NIGHT
E WINDS 5 TO 10 KT, BECOMING SE AFTER MIDNIGHT. SEAS
2 TO 3 FT. WAVE DETAIL: N 2 FT AT 5 SECONDS AND S 2 FT AT
6 SECONDS.
SUN
S WINDS 15 TO 20 KT, BECOMING SW IN THE AFTERNOON. GUSTS
UP TO 25 KT. SEAS 2 TO 4 FT, BUILDING TO 4 TO 5 FT IN THE
AFTERNOON. WAVE DETAIL: S 3 FT AT 6 SECONDS AND E 3 FT AT
7 SECONDS, BECOMING SW 4 FT AT 5 SECONDS AND E 3 FT AT 8 SECONDS.
SHOWERS LIKELY IN THE AFTERNOON.
SUN NIGHT
NW WINDS 20 TO 25 KT. SEAS 5 TO 6 FT. WAVE DETAIL: W
5 FT AT 5 SECONDS AND S 3 FT AT 6 SECONDS. SHOWERS LIKELY, MAINLY
IN THE EVENING.
MON
NW WINDS 15 TO 20 KT. SEAS 4 TO 6 FT.
MON NIGHT
NW WINDS 15 TO 20 KT. SEAS 3 TO 5 FT.
TUE
NW WINDS 15 TO 20 KT. SEAS 2 TO 4 FT.
TUE NIGHT
SW WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS
3 TO 5 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.
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