920
FZUS51 KBOX 042304
CWFBOX
COASTAL WATERS FORECAST FOR MASSACHUSETTS AND RHODE ISLAND
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
703 PM EDT MON AUG 4 2025
COASTAL WATERS FROM THE MERRIMACK RIVER MA TO WATCH HILL RI OUT
TO 25 NM
ANZ200-051200-
703 PM EDT MON AUG 4 2025
SYNOPSIS FOR MASSACHUSETTS AND RHODE ISLAND COASTAL WATERS
A PROLONGED PERIOD OF RATHER TRANQUIL MARINE CONDITIONS DUE TO A
VAST HIGH PRES MOST OF THIS WEEK, BUT WILL NEED TO MONITOR A LOW
PRES OFF THE CAROLINA COAST. THIS FEATURE MAY SEND SWELLS TOWARDS
SRN NEW ENGLAND FROM WEDNESDAY THROUGH EARLY FRIDAY.
ANZ250-051200-
COASTAL WATERS EAST OF IPSWICH BAY AND THE STELLWAGEN BANK
NATIONAL MARINE SANCTUARY-
703 PM EDT MON AUG 4 2025
TONIGHT
S WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: E
2 FT AT 7 SECONDS AND S 1 FOOT AT 3 SECONDS.
TUE
NE WINDS 10 TO 15 KT. SEAS 2 TO 3 FT. WAVE DETAIL: E 3 FT
AT 7 SECONDS AND S 1 FOOT AT 3 SECONDS.
TUE NIGHT
NE WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: NE
3 FT AT 7 SECONDS. PATCHY FOG. VSBY 1 NM OR LESS.
WED
NE WINDS AROUND 10 KT. SEAS 2 TO 4 FT. WAVE DETAIL: E 3 FT
AT 9 SECONDS.
WED NIGHT AND THU
SE WINDS 5 TO 10 KT. SEAS 3 TO 4 FT. WAVE
DETAIL: E 3 FT AT 8 SECONDS.
THU NIGHT
S WINDS AROUND 10 KT, BECOMING SW AFTER MIDNIGHT.
SEAS AROUND 3 FT. WAVE DETAIL: E 3 FT AT 8 SECONDS.
FRI THROUGH SAT NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO
20 KT. SEAS 3 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.
ANZ251-051200-
MASSACHUSETTS BAY AND IPSWICH BAY-
703 PM EDT MON AUG 4 2025
TONIGHT
S WINDS 5 TO 10 KT, BECOMING W AFTER MIDNIGHT. SEAS
AROUND 2 FT. WAVE DETAIL: E 2 FT AT 7 SECONDS AND SE 1 FOOT AT
3 SECONDS.
TUE
NE WINDS 5 TO 10 KT, INCREASING TO 10 TO 15 KT IN THE
AFTERNOON. SEAS 2 TO 3 FT. WAVE DETAIL: E 3 FT AT 7 SECONDS AND
SE 1 FOOT AT 2 SECONDS.
TUE NIGHT
NE WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: NE
3 FT AT 6 SECONDS. PATCHY FOG. VSBY 1 TO 3 NM, DECREASING TO 1 NM
OR LESS AFTER MIDNIGHT.
WED
NE WINDS AROUND 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: NE
3 FT AT 8 SECONDS.
WED NIGHT AND THU
SE WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE
DETAIL: E 3 FT AT 8 SECONDS.
THU NIGHT
S WINDS 5 TO 10 KT, BECOMING SW AFTER MIDNIGHT. SEAS
2 TO 3 FT. WAVE DETAIL: E 3 FT AT 8 SECONDS.
FRI THROUGH SAT NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP 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.
ANZ231-051200-
CAPE COD BAY-
703 PM EDT MON AUG 4 2025
TONIGHT
S WINDS 5 TO 10 KT. SEAS 1 FOOT OR LESS. WAVE DETAIL:
S 1 FOOT AT 2 SECONDS AND E 1 FOOT AT 7 SECONDS.
TUE
NE WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: E 2 FT
AT 7 SECONDS AND E 1 FOOT AT 2 SECONDS.
TUE NIGHT
NE WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL:
NE 1 FOOT AT 3 SECONDS. PATCHY FOG. VSBY 1 TO 3 NM, DECREASING TO
1 NM OR LESS AFTER MIDNIGHT.
WED
NE WINDS AROUND 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: NE
1 FOOT AT 4 SECONDS.
WED NIGHT AND THU
E WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: NE 2 FT AT 5 SECONDS AND E 1 FOOT AT 2 SECONDS.
THU NIGHT
SE WINDS 5 TO 10 KT, BECOMING SW AFTER MIDNIGHT.
SEAS AROUND 2 FT. WAVE DETAIL: E 2 FT AT 6 SECONDS AND SE 1 FOOT
AT 2 SECONDS.
FRI THROUGH SAT NIGHT
SW WINDS 5 TO 10 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.
ANZ254-051200-
COASTAL WATERS FROM PROVINCETOWN MA TO CHATHAM MA TO NANTUCKET MA
OUT 20 NM-
703 PM EDT MON AUG 4 2025
TONIGHT
S WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: E
3 FT AT 7 SECONDS.
TUE
NE WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: E 3 FT
AT 8 SECONDS. PATCHY FOG IN THE AFTERNOON WITH VSBY 1 TO 3 NM.
TUE NIGHT
NE WINDS AROUND 10 KT. SEAS 2 TO 4 FT. WAVE DETAIL:
NE 4 FT AT 8 SECONDS. PATCHY FOG IN THE EVENING WITH VSBY 1 NM OR
LESS.
WED
NE WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 3 TO
4 FT. WAVE DETAIL: NE 4 FT AT 8 SECONDS.
WED NIGHT AND THU
E WINDS 10 TO 15 KT. SEAS 3 TO 4 FT. WAVE
DETAIL: E 4 FT AT 8 SECONDS.
THU NIGHT
SE WINDS 5 TO 10 KT. SEAS 3 TO 4 FT. WAVE DETAIL: E
4 FT AT 9 SECONDS.
FRI THROUGH SAT NIGHT
SW WINDS 5 TO 10 KT. SEAS 3 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.
ANZ255-051200-
COASTAL WATERS EXTENDING OUT TO 25 NM SOUTH OF MARTHAS VINEYARD
AND NANTUCKET-
703 PM EDT MON AUG 4 2025
TONIGHT
SE WINDS AROUND 5 KT. SEAS 2 TO 3 FT. WAVE DETAIL: E
3 FT AT 8 SECONDS.
TUE
E WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: E 3 FT AT
8 SECONDS AND E 1 FOOT AT 2 SECONDS.
TUE NIGHT
NE WINDS 10 TO 15 KT. SEAS 2 TO 4 FT. WAVE DETAIL: E
4 FT AT 9 SECONDS AND E 1 FOOT AT 3 SECONDS. PATCHY FOG. VSBY
1 NM OR LESS.
WED
NE WINDS AROUND 15 KT WITH GUSTS UP TO 20 KT. SEAS 3 TO
4 FT. WAVE DETAIL: E 4 FT AT 9 SECONDS.
WED NIGHT THROUGH THU NIGHT
E WINDS 10 TO 15 KT WITH GUSTS UP
TO 20 KT. SEAS 3 TO 5 FT. WAVE DETAIL: E 4 FT AT 8 SECONDS.
FRI THROUGH SAT NIGHT
S WINDS 10 TO 15 KT. SEAS 2 TO 4 FT.
WAVE DETAIL: E 4 FT AT 9 SECONDS AND SE 1 FOOT 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.
ANZ256-051200-
COASTAL WATERS FROM MONTAUK NY TO MARTHAS VINEYARD EXTENDING OUT
TO 20 NM SOUTH OF BLOCK ISLAND-
703 PM EDT MON AUG 4 2025
TONIGHT
S WINDS AROUND 5 KT. SEAS 2 TO 3 FT. WAVE DETAIL: SE
3 FT AT 8 SECONDS.
TUE
E WINDS 5 TO 10 KT. SEAS AROUND 3 FT. WAVE DETAIL: E 3 FT
AT 8 SECONDS.
TUE NIGHT
NE WINDS 10 TO 15 KT. GUSTS UP TO 20 KT AFTER
MIDNIGHT. SEAS 3 TO 4 FT. WAVE DETAIL: E 4 FT AT 8 SECONDS.
PATCHY FOG AFTER MIDNIGHT WITH VSBY 1 NM OR LESS.
WED
NE WINDS AROUND 15 KT WITH GUSTS UP TO 20 KT. SEAS 4 TO
5 FT. WAVE DETAIL: E 5 FT AT 9 SECONDS.
WED NIGHT THROUGH THU NIGHT
E WINDS 10 TO 15 KT WITH GUSTS UP
TO 20 KT. SEAS 3 TO 5 FT. WAVE DETAIL: E 5 FT AT 9 SECONDS AND S
1 FOOT AT 7 SECONDS.
FRI THROUGH SAT NIGHT
SW WINDS 10 TO 15 KT. SEAS 2 TO 4 FT.
WAVE DETAIL: E 4 FT AT 9 SECONDS AND S 1 FOOT AT 7 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.
ANZ232-051200-
NANTUCKET SOUND-
703 PM EDT MON AUG 4 2025
TONIGHT
S WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: SW
1 FOOT AT 2 SECONDS AND E 1 FOOT AT 7 SECONDS.
TUE
E WINDS 5 TO 10 KT, INCREASING TO 10 TO 15 KT IN THE
AFTERNOON. SEAS AROUND 2 FT. WAVE DETAIL: E 1 FOOT AT 2 SECONDS
AND E 1 FOOT AT 7 SECONDS.
TUE NIGHT
NE WINDS 10 TO 15 KT. SEAS AROUND 2 FT. WAVE DETAIL:
E 2 FT AT 7 SECONDS AND E 1 FOOT AT 3 SECONDS. PATCHY FOG. VSBY
1 TO 3 NM, DECREASING TO 1 NM OR LESS AFTER MIDNIGHT.
WED
NE WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
3 FT. WAVE DETAIL: E 2 FT AT 4 SECONDS.
WED NIGHT THROUGH THU NIGHT
SE WINDS 10 TO 15 KT. SEAS 2 TO
3 FT. WAVE DETAIL: E 2 FT AT 7 SECONDS AND E 1 FOOT AT 3 SECONDS.
FRI THROUGH SAT NIGHT
SW WINDS 10 TO 15 KT. SEAS 2 TO 3 FT.
WAVE DETAIL: SE 2 FT AT 3 SECONDS AND E 2 FT AT 9 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.
ANZ233-051200-
VINEYARD SOUND-
703 PM EDT MON AUG 4 2025
TONIGHT
S WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: SW
1 FOOT AT 2 SECONDS AND SE 1 FOOT AT 8 SECONDS.
TUE
E WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: SE
1 FOOT AT 2 SECONDS AND SE 1 FOOT AT 8 SECONDS.
TUE NIGHT
NE WINDS AROUND 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: E 1 FOOT AT 5 SECONDS.
WED
NE WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS AROUND
2 FT. WAVE DETAIL: E 2 FT AT 4 SECONDS.
WED NIGHT THROUGH THU NIGHT
SE WINDS 10 TO 15 KT. SEAS AROUND
2 FT. WAVE DETAIL: E 2 FT AT 4 SECONDS.
FRI THROUGH SAT NIGHT
SW WINDS 10 TO 15 KT. SEAS AROUND 2 FT.
WAVE DETAIL: SE 2 FT AT 8 SECONDS AND E 1 FOOT 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.
ANZ234-051200-
BUZZARDS BAY-
703 PM EDT MON AUG 4 2025
TONIGHT
SW WINDS 5 TO 10 KT. SEAS 1 FOOT OR LESS. WAVE DETAIL:
SW 1 FOOT AT 2 SECONDS AND SE 1 FOOT AT 8 SECONDS.
TUE
NE WINDS 5 TO 10 KT. SEAS 1 FOOT OR LESS, THEN AROUND 2 FT
IN THE AFTERNOON. WAVE DETAIL: SE 1 FOOT AT 2 SECONDS AND SE
1 FOOT AT 8 SECONDS, BECOMING E 1 FOOT AT 2 SECONDS AND SE 1 FOOT
AT 7 SECONDS.
TUE NIGHT
NE WINDS AROUND 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: E 1 FOOT AT 4 SECONDS. PATCHY FOG AFTER MIDNIGHT WITH
VSBY 1 NM OR LESS.
WED
NE WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS AROUND
2 FT. WAVE DETAIL: NE 1 FOOT AT 3 SECONDS.
WED NIGHT
E WINDS 10 TO 15 KT. SEAS AROUND 2 FT. WAVE DETAIL:
E 2 FT AT 7 SECONDS AND E 1 FOOT AT 3 SECONDS.
THU AND THU NIGHT
SE WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: E 2 FT AT 7 SECONDS AND E 1 FOOT AT 2 SECONDS.
FRI THROUGH SAT NIGHT
SW WINDS 10 TO 15 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.
ANZ235-051200-
RHODE ISLAND SOUND-
703 PM EDT MON AUG 4 2025
TONIGHT
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: SE
2 FT AT 8 SECONDS AND SW 1 FOOT AT 2 SECONDS.
TUE
E 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.
TUE NIGHT
NE WINDS 10 TO 15 KT. SEAS 2 TO 3 FT. WAVE DETAIL: E
3 FT AT 8 SECONDS AND E 2 FT AT 4 SECONDS.
WED
NE WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
3 FT. WAVE DETAIL: E 3 FT AT 8 SECONDS.
WED NIGHT THROUGH THU NIGHT
SE WINDS 10 TO 15 KT WITH GUSTS UP
TO 20 KT. SEAS 2 TO 3 FT. WAVE DETAIL: E 3 FT AT 8 SECONDS.
FRI THROUGH SAT NIGHT
SW WINDS 10 TO 15 KT. SEAS 2 TO 3 FT.
WAVE DETAIL: SE 3 FT AT 9 SECONDS AND S 2 FT AT 6 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.
ANZ237-051200-
BLOCK ISLAND SOUND-
703 PM EDT MON AUG 4 2025
TONIGHT
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: SE
2 FT AT 8 SECONDS AND SW 1 FOOT AT 2 SECONDS.
TUE
NE WINDS 5 TO 10 KT, BECOMING E IN THE AFTERNOON. SEAS
2 TO 3 FT. WAVE DETAIL: SE 3 FT AT 8 SECONDS AND E 1 FOOT AT
2 SECONDS.
TUE NIGHT
NE WINDS 10 TO 15 KT. SEAS 2 TO 3 FT. WAVE DETAIL:
SE 3 FT AT 8 SECONDS AND E 1 FOOT AT 3 SECONDS.
WED
E WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
4 FT. WAVE DETAIL: E 4 FT AT 9 SECONDS.
WED NIGHT THROUGH THU NIGHT
E WINDS 10 TO 15 KT WITH GUSTS UP
TO 20 KT. SEAS 2 TO 4 FT. WAVE DETAIL: E 4 FT AT 8 SECONDS.
FRI THROUGH SAT NIGHT
SW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT.
WAVE DETAIL: E 3 FT AT 9 SECONDS AND S 1 FOOT AT 6 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.
ANZ230-051200-
BOSTON HARBOR-
703 PM EDT MON AUG 4 2025
TONIGHT
S WINDS 5 TO 10 KT, BECOMING W AFTER MIDNIGHT. WAVES
1 FOOT OR LESS.
TUE
NE WINDS 5 TO 10 KT, INCREASING TO 10 TO 15 KT IN THE
AFTERNOON. WAVES AROUND 2 FT.
TUE NIGHT
NE WINDS 5 TO 10 KT. WAVES AROUND 2 FT IN THE
EVENING, THEN 1 FOOT OR LESS. PATCHY FOG AFTER MIDNIGHT WITH VSBY
1 TO 3 NM.
WED
NE WINDS 5 TO 10 KT. WAVES 1 FOOT OR LESS, THEN AROUND
2 FT IN THE AFTERNOON.
WED NIGHT AND THU
SE WINDS 5 TO 10 KT. WAVES AROUND 2 FT.
THU NIGHT
S WINDS 5 TO 10 KT, BECOMING SW AFTER MIDNIGHT.
WAVES AROUND 2 FT IN THE EVENING, THEN 1 FOOT OR LESS.
FRI THROUGH SAT NIGHT
SW WINDS 10 TO 15 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.
ANZ236-051200-
NARRAGANSETT BAY-
703 PM EDT MON AUG 4 2025
TONIGHT
S WINDS 5 TO 10 KT, BECOMING SW AFTER MIDNIGHT. WAVES
AROUND 2 FT.
TUE
NE WINDS 5 TO 10 KT, BECOMING SE IN THE AFTERNOON. WAVES
AROUND 2 FT.
TUE NIGHT
NE WINDS 5 TO 10 KT. WAVES AROUND 2 FT.
WED
NE WINDS AROUND 10 KT, BECOMING E IN THE AFTERNOON. WAVES
AROUND 2 FT.
WED NIGHT
E WINDS 5 TO 10 KT. WAVES AROUND 2 FT.
THU AND THU NIGHT
SW WINDS 5 TO 10 KT. WAVES AROUND 2 FT.
FRI THROUGH SAT NIGHT
SW WINDS 5 TO 10 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.
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