171
FZUS51 KBOX 301404
CWFBOX
COASTAL WATERS FORECAST FOR MASSACHUSETTS AND RHODE ISLAND
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
1004 AM EDT THU JUL 30 2026
COASTAL WATERS FROM THE MERRIMACK RIVER MA TO WATCH HILL RI OUT
TO 60 NM
ANZ200-310300-
1004 AM EDT THU JUL 30 2026
SYNOPSIS FOR MASSACHUSETTS AND RHODE ISLAND COASTAL WATERS
ROUGH SEAS CONTINUE THROUGH FRI AS LOW PRES APPROACHES FROM THE W
AND BRINGS PERIODIC CHANCES FOR SHOWERS AND PERHAPS THUNDERSTORMS.
WINDS WILL BE MORE NE THROUGH THU, GOING MORE NW THU NIGHT. ROUGH
SEAS SHOULD START TO DIMINISH HEADING INTO THE BACK HALF OF THE WEEK.
ANZ250-310300-
COASTAL WATERS EAST OF IPSWICH BAY AND THE STELLWAGEN BANK
NATIONAL MARINE SANCTUARY-
1004 AM EDT THU JUL 30 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING
THIS AFTERNOON
NE WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS 3 TO 4 FT. WAVE DETAIL: NE 4 FT AT 6 SECONDS AND SE 3 FT AT
9 SECONDS. PATCHY FOG. A SLIGHT CHANCE OF TSTMS. SHOWERS LIKELY,
THEN A CHANCE OF SHOWERS. VSBY 1 NM OR LESS.
TONIGHT
N WINDS 5 TO 10 KT. SEAS 3 TO 4 FT. WAVE DETAIL: N
3 FT AT 5 SECONDS AND SE 3 FT AT 9 SECONDS. PATCHY FOG. A CHANCE
OF SHOWERS IN THE EVENING. VSBY 1 NM OR LESS, INCREASING TO 1 TO
3 NM AFTER MIDNIGHT.
FRI
N WINDS 5 TO 10 KT, BECOMING SW IN THE AFTERNOON. SEAS
2 TO 4 FT. WAVE DETAIL: NE 3 FT AT 5 SECONDS AND SE 3 FT AT
9 SECONDS.
FRI NIGHT
SW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: NE
2 FT AT 6 SECONDS AND SE 2 FT AT 9 SECONDS.
SAT AND SAT NIGHT
S WINDS 5 TO 10 KT WITH GUSTS UP TO 20 KT.
SEAS AROUND 2 FT. WAVE DETAIL: S 2 FT AT 4 SECONDS AND SE 2 FT AT
9 SECONDS.
SUN
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
3 FT. WAVE DETAIL: S 2 FT AT 4 SECONDS AND SE 2 FT AT 8 SECONDS.
SUN NIGHT AND MON
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT,
BECOMING SW 5 TO 10 KT. SEAS 2 TO 3 FT. A CHANCE OF SHOWERS.
MON NIGHT
W WINDS 5 TO 10 KT. SEAS 2 TO 3 FT.
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.
ANZ251-310300-
MASSACHUSETTS BAY AND IPSWICH BAY-
1004 AM EDT THU JUL 30 2026
THIS AFTERNOON
NE WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS 2 TO 4 FT. WAVE DETAIL: NE 4 FT AT 6 SECONDS AND N 3 FT AT
3 SECONDS. PATCHY FOG. SHOWERS LIKELY WITH A SLIGHT CHANCE OF
TSTMS. VSBY 1 NM OR LESS.
TONIGHT
N WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: NE
3 FT AT 5 SECONDS AND SE 1 FOOT AT 10 SECONDS. PATCHY FOG. VSBY
1 TO 3 NM IN THE EVENING.
FRI
N WINDS AROUND 5 KT, BECOMING SE IN THE AFTERNOON. SEAS
2 TO 3 FT. WAVE DETAIL: E 3 FT AT 6 SECONDS AND NW 1 FOOT AT
5 SECONDS.
FRI NIGHT
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL:
E 2 FT AT 6 SECONDS AND SW 1 FOOT AT 3 SECONDS.
SAT AND SAT NIGHT
S WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: S 2 FT AT 3 SECONDS AND E 2 FT AT 6 SECONDS.
SUN
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS AROUND
2 FT. WAVE DETAIL: SE 2 FT AT 4 SECONDS AND SE 1 FOOT AT
9 SECONDS.
SUN NIGHT
S WINDS 10 TO 15 KT. SEAS AROUND 2 FT. SHOWERS
LIKELY.
MON
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. A CHANCE OF
SHOWERS.
MON NIGHT
W WINDS 5 TO 10 KT. SEAS AROUND 2 FT.
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.
ANZ231-310300-
CAPE COD BAY-
1004 AM EDT THU JUL 30 2026
THIS AFTERNOON
N WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS AROUND 2 FT. WAVE DETAIL: N 2 FT AT 3 SECONDS AND E 1 FOOT
AT 10 SECONDS. PATCHY FOG. A CHANCE OF SHOWERS WITH A SLIGHT
CHANCE OF TSTMS. 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 E 1 FOOT AT 11 SECONDS. PATCHY FOG. A
CHANCE OF SHOWERS IN THE EVENING. VSBY 1 NM OR LESS, INCREASING
TO 1 TO 3 NM AFTER MIDNIGHT.
FRI
N WINDS 5 TO 10 KT, BECOMING NE IN THE AFTERNOON. SEAS
AROUND 2 FT. WAVE DETAIL: N 2 FT AT 5 SECONDS AND SE 1 FOOT AT
10 SECONDS.
FRI NIGHT
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL:
SW 1 FOOT AT 3 SECONDS AND N 1 FOOT AT 5 SECONDS.
SAT AND SAT NIGHT
S WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: SW 1 FOOT AT 2 SECONDS AND NE 1 FOOT AT 4 SECONDS.
SUN
S WINDS 5 TO 10 KT WITH GUSTS UP TO 20 KT. SEAS AROUND
2 FT. WAVE DETAIL: SE 2 FT AT 8 SECONDS AND S 1 FOOT AT
2 SECONDS.
SUN NIGHT
S WINDS 5 TO 10 KT. SEAS AROUND 2 FT. A CHANCE OF
SHOWERS.
MON
SW WINDS 5 TO 10 KT. SEAS 1 FOOT OR LESS. A CHANCE OF
SHOWERS.
MON NIGHT
W WINDS AROUND 5 KT. SEAS 1 FOOT OR LESS.
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.
ANZ254-310300-
COASTAL WATERS FROM PROVINCETOWN MA TO CHATHAM MA TO NANTUCKET MA
OUT 20 NM-
1004 AM EDT THU JUL 30 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 PM EDT THIS AFTERNOON
THIS AFTERNOON
SW WINDS 5 TO 10 KT, BECOMING NW. SEAS 3 TO
5 FT. WAVE DETAIL: E 4 FT AT 7 SECONDS AND W 1 FOOT AT 3 SECONDS.
PATCHY FOG. A CHANCE OF SHOWERS WITH A SLIGHT CHANCE OF TSTMS.
VSBY 1 NM OR LESS.
TONIGHT
NW WINDS AROUND 10 KT. SEAS 3 TO 4 FT. WAVE DETAIL: E
4 FT AT 7 SECONDS AND NW 1 FOOT AT 3 SECONDS. PATCHY FOG. VSBY
1 NM OR LESS, INCREASING TO 1 TO 3 NM AFTER MIDNIGHT.
FRI
NW WINDS 5 TO 10 KT. SEAS 3 TO 4 FT. WAVE DETAIL: SE 4 FT
AT 9 SECONDS AND NE 2 FT AT 6 SECONDS.
FRI NIGHT
SW WINDS 5 TO 10 KT. SEAS 2 TO 4 FT. WAVE DETAIL: SE
3 FT AT 9 SECONDS AND NE 2 FT AT 6 SECONDS.
SAT AND SAT NIGHT
S WINDS 5 TO 10 KT WITH GUSTS UP TO 20 KT.
SEAS 2 TO 3 FT. WAVE DETAIL: SE 3 FT AT 9 SECONDS AND SW 2 FT AT
3 SECONDS.
SUN
S WINDS AROUND 10 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
3 FT. WAVE DETAIL: S 2 FT AT 3 SECONDS AND SE 2 FT AT 8 SECONDS.
SUN NIGHT
S WINDS AROUND 10 KT. SEAS 2 TO 3 FT. A CHANCE OF
SHOWERS.
MON
SW WINDS 5 TO 10 KT. SEAS 3 TO 5 FT. A CHANCE OF SHOWERS.
MON NIGHT
W WINDS 5 TO 10 KT. SEAS 3 TO 5 FT.
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.
ANZ255-310300-
COASTAL WATERS EXTENDING OUT TO 25 NM SOUTH OF MARTHAS VINEYARD
AND NANTUCKET-
1004 AM EDT THU JUL 30 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 PM EDT THIS AFTERNOON
THIS AFTERNOON
W WINDS 5 TO 10 KT, BECOMING NW 10 TO 15 KT.
SEAS 3 TO 5 FT. WAVE DETAIL: S 4 FT AT 8 SECONDS AND NW 2 FT AT
3 SECONDS. PATCHY FOG. A CHANCE OF SHOWERS WITH A SLIGHT CHANCE
OF TSTMS. VSBY 1 TO 3 NM.
TONIGHT
NW WINDS 10 TO 15 KT. SEAS 3 TO 5 FT. WAVE DETAIL: S
4 FT AT 8 SECONDS AND E 2 FT AT 6 SECONDS. PATCHY FOG. VSBY 1 TO
3 NM.
FRI
NW WINDS 5 TO 10 KT, BECOMING W IN THE AFTERNOON. SEAS
3 TO 5 FT. WAVE DETAIL: S 4 FT AT 9 SECONDS AND E 2 FT AT
6 SECONDS. PATCHY FOG IN THE MORNING WITH VSBY 1 TO 3 NM.
FRI NIGHT
SW WINDS 5 TO 10 KT. SEAS 3 TO 4 FT. WAVE DETAIL: S
3 FT AT 8 SECONDS AND W 2 FT AT 4 SECONDS.
SAT AND SAT NIGHT
S WINDS 5 TO 10 KT. SEAS 3 TO 4 FT. WAVE
DETAIL: S 3 FT AT 9 SECONDS AND SW 2 FT AT 3 SECONDS.
SUN
S WINDS AROUND 10 KT. SEAS AROUND 3 FT. WAVE DETAIL: SE
3 FT AT 7 SECONDS AND SW 2 FT AT 4 SECONDS.
SUN NIGHT
S WINDS AROUND 10 KT. SEAS 2 TO 3 FT. A CHANCE OF
SHOWERS.
MON
SW WINDS 10 TO 15 KT. SEAS 3 TO 5 FT. A CHANCE OF SHOWERS.
MON NIGHT
W WINDS 5 TO 10 KT. SEAS 4 TO 6 FT.
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.
ANZ256-310300-
COASTAL WATERS FROM MONTAUK NY TO MARTHAS VINEYARD EXTENDING OUT
TO 20 NM SOUTH OF BLOCK ISLAND-
1004 AM EDT THU JUL 30 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 PM EDT THIS AFTERNOON
THIS AFTERNOON
N WINDS 10 TO 15 KT. SEAS 4 TO 5 FT. WAVE
DETAIL: SE 4 FT AT 7 SECONDS AND N 3 FT AT 3 SECONDS. PATCHY FOG.
A CHANCE OF SHOWERS WITH A SLIGHT CHANCE OF TSTMS.
TONIGHT
N WINDS 10 TO 15 KT. SEAS AROUND 4 FT. WAVE DETAIL: S
4 FT AT 8 SECONDS AND N 2 FT AT 5 SECONDS.
FRI
NW WINDS 5 TO 10 KT, BECOMING W IN THE AFTERNOON. SEAS
3 TO 4 FT. WAVE DETAIL: S 4 FT AT 9 SECONDS AND NW 1 FOOT AT
3 SECONDS. PATCHY FOG IN THE MORNING WITH VSBY 1 NM OR LESS.
FRI NIGHT
SW WINDS AROUND 10 KT. SEAS AROUND 3 FT. WAVE
DETAIL: SE 3 FT AT 7 SECONDS AND SW 1 FOOT AT 3 SECONDS.
SAT AND SAT NIGHT
S WINDS 10 TO 15 KT. SEAS AROUND 3 FT. WAVE
DETAIL: S 3 FT AT 9 SECONDS AND SW 2 FT AT 4 SECONDS.
SUN
S WINDS AROUND 10 KT. SEAS AROUND 3 FT. WAVE DETAIL: SE
3 FT AT 7 SECONDS AND SW 2 FT AT 4 SECONDS.
SUN NIGHT
S WINDS AROUND 10 KT. SEAS AROUND 3 FT. A CHANCE OF
SHOWERS.
MON
SW WINDS AROUND 10 KT. SEAS 4 TO 6 FT. A CHANCE OF
SHOWERS.
MON NIGHT
W WINDS 5 TO 10 KT. SEAS 5 TO 7 FT.
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.
ANZ232-310300-
NANTUCKET SOUND-
1004 AM EDT THU JUL 30 2026
THIS AFTERNOON
NW WINDS 10 TO 15 KT. SEAS 2 TO 3 FT. WAVE
DETAIL: NW 2 FT AT 3 SECONDS AND S 2 FT AT 8 SECONDS. PATCHY FOG.
A CHANCE OF SHOWERS WITH A SLIGHT CHANCE OF TSTMS. VSBY 1 TO
3 NM.
TONIGHT
N WINDS 10 TO 15 KT. SEAS 2 TO 3 FT. WAVE DETAIL: NW
2 FT AT 3 SECONDS AND SE 2 FT AT 7 SECONDS. PATCHY FOG. VSBY 1 TO
3 NM.
FRI
NW WINDS 5 TO 10 KT, BECOMING W IN THE AFTERNOON. SEAS
2 TO 3 FT. WAVE DETAIL: NW 2 FT AT 3 SECONDS AND NE 1 FOOT AT
6 SECONDS.
FRI NIGHT
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL:
SW 1 FOOT AT 4 SECONDS AND E 1 FOOT AT 6 SECONDS.
SAT AND SAT NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS AROUND 2 FT. WAVE DETAIL: SW 2 FT AT 3 SECONDS AND E 1 FOOT
AT 6 SECONDS.
SUN
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS AROUND
2 FT. WAVE DETAIL: S 2 FT AT 3 SECONDS AND E 1 FOOT AT 7 SECONDS.
SUN NIGHT AND MON
SW WINDS 10 TO 15 KT. SEAS 2 TO 3 FT. A
CHANCE OF SHOWERS.
MON NIGHT
W WINDS 5 TO 10 KT. SEAS 2 TO 3 FT.
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.
ANZ233-310300-
VINEYARD SOUND-
1004 AM EDT THU JUL 30 2026
THIS AFTERNOON
NW WINDS 10 TO 15 KT. GUSTS UP TO 20 KT. SEAS
2 TO 3 FT. WAVE DETAIL: SW 3 FT AT 8 SECONDS AND N 2 FT AT
4 SECONDS. PATCHY FOG. A CHANCE OF TSTMS. A CHANCE OF SHOWERS,
THEN SHOWERS LIKELY WITH VSBY 1 TO 3 NM.
TONIGHT
N WINDS 10 TO 15 KT, BECOMING NW 5 TO 10 KT AFTER
MIDNIGHT. SEAS 2 TO 3 FT. WAVE DETAIL: SW 3 FT AT 8 SECONDS AND
NW 2 FT AT 3 SECONDS. PATCHY FOG IN THE EVENING.
FRI
NW WINDS 5 TO 10 KT, BECOMING W IN THE AFTERNOON. SEAS
2 TO 3 FT. WAVE DETAIL: SW 2 FT AT 9 SECONDS AND NW 1 FOOT AT
4 SECONDS.
FRI NIGHT
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL:
SW 2 FT AT 8 SECONDS AND SW 1 FOOT AT 3 SECONDS.
SAT AND SAT NIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS AROUND 2 FT. WAVE DETAIL: SW 2 FT AT 3 SECONDS AND SW 2 FT
AT 9 SECONDS.
SUN
S WINDS 10 TO 15 KT. SEAS AROUND 2 FT. WAVE DETAIL: SW
2 FT AT 4 SECONDS AND S 1 FOOT AT 8 SECONDS.
SUN NIGHT
SW WINDS AROUND 10 KT. SEAS AROUND 2 FT. A CHANCE OF
SHOWERS.
MON
SW WINDS AROUND 10 KT. SEAS 2 TO 4 FT. A CHANCE OF
SHOWERS.
MON NIGHT
W WINDS 5 TO 10 KT. SEAS 2 TO 4 FT.
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.
ANZ234-310300-
BUZZARDS BAY-
1004 AM EDT THU JUL 30 2026
THIS AFTERNOON
N WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS AROUND 2 FT. WAVE DETAIL: N 1 FOOT AT 4 SECONDS AND SW
1 FOOT AT 8 SECONDS. PATCHY FOG. SHOWERS LIKELY WITH A CHANCE OF
TSTMS. VSBY 1 TO 3 NM.
TONIGHT
N WINDS 10 TO 15 KT, BECOMING NW 5 TO 10 KT AFTER
MIDNIGHT. SEAS AROUND 2 FT. WAVE DETAIL: N 2 FT AT 3 SECONDS AND
SW 1 FOOT AT 8 SECONDS. PATCHY FOG IN THE EVENING WITH VSBY 1 TO
3 NM.
FRI
NW WINDS 5 TO 10 KT, BECOMING SW IN THE AFTERNOON. SEAS
AROUND 2 FT. WAVE DETAIL: NE 1 FOOT AT 2 SECONDS AND W 1 FOOT AT
4 SECONDS.
FRI NIGHT
SW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL:
SW 1 FOOT AT 3 SECONDS AND E 1 FOOT AT 7 SECONDS.
SAT AND SAT NIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS 2 TO 3 FT. WAVE DETAIL: SW 2 FT AT 4 SECONDS AND E 1 FOOT AT
6 SECONDS.
SUN
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS AROUND
2 FT. WAVE DETAIL: SW 2 FT AT 4 SECONDS AND S 1 FOOT 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
SW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. A CHANCE OF SHOWERS.
MON NIGHT
W WINDS 5 TO 10 KT. SEAS 2 TO 3 FT.
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.
ANZ235-310300-
RHODE ISLAND SOUND-
1004 AM EDT THU JUL 30 2026
THIS AFTERNOON
N WINDS 10 TO 15 KT. GUSTS UP TO 20 KT. SEAS
3 TO 4 FT. WAVE DETAIL: S 4 FT AT 8 SECONDS AND N 2 FT AT
3 SECONDS. PATCHY FOG. SHOWERS LIKELY. A CHANCE OF TSTMS, THEN A
SLIGHT CHANCE OF TSTMS WITH VSBY 1 TO 3 NM.
TONIGHT
N WINDS 10 TO 15 KT, BECOMING NW 5 TO 10 KT AFTER
MIDNIGHT. SEAS 3 TO 4 FT. WAVE DETAIL: S 4 FT AT 8 SECONDS AND N
2 FT AT 3 SECONDS.
FRI
NW WINDS 5 TO 10 KT, BECOMING SW IN THE AFTERNOON. SEAS
2 TO 4 FT. WAVE DETAIL: S 3 FT AT 9 SECONDS AND NW 1 FOOT AT
4 SECONDS. PATCHY FOG IN THE MORNING WITH VSBY 1 NM OR LESS.
FRI NIGHT
SW WINDS AROUND 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL:
SE 3 FT AT 7 SECONDS AND SW 2 FT AT 3 SECONDS.
SAT AND SAT NIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS 2 TO 3 FT. WAVE DETAIL: S 3 FT AT 9 SECONDS AND SW 2 FT AT
4 SECONDS.
SUN
S WINDS 10 TO 15 KT. SEAS 2 TO 3 FT. WAVE DETAIL: S 3 FT
AT 8 SECONDS AND SW 2 FT AT 4 SECONDS.
SUN NIGHT
SW WINDS 10 TO 15 KT. SEAS 2 TO 3 FT. A CHANCE OF
SHOWERS.
MON
SW WINDS AROUND 10 KT. SEAS 3 TO 5 FT. A CHANCE OF
SHOWERS.
MON NIGHT
W WINDS 5 TO 10 KT. SEAS 4 TO 6 FT.
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.
ANZ237-310300-
BLOCK ISLAND SOUND-
1004 AM EDT THU JUL 30 2026
THIS AFTERNOON
N WINDS 10 TO 15 KT. SEAS 3 TO 4 FT. WAVE
DETAIL: S 4 FT AT 8 SECONDS AND NW 2 FT AT 3 SECONDS. PATCHY FOG.
A SLIGHT CHANCE OF TSTMS. SHOWERS LIKELY, THEN A CHANCE OF
SHOWERS.
TONIGHT
N WINDS 5 TO 10 KT. SEAS 2 TO 4 FT. WAVE DETAIL: S
4 FT AT 8 SECONDS AND N 1 FOOT AT 5 SECONDS.
FRI
NW WINDS AROUND 5 KT, BECOMING SW IN THE AFTERNOON. SEAS
2 TO 3 FT. WAVE DETAIL: S 3 FT AT 9 SECONDS AND W 1 FOOT AT
4 SECONDS. PATCHY FOG IN THE MORNING WITH VSBY 1 NM OR LESS.
FRI NIGHT
SW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: S
3 FT AT 8 SECONDS AND SW 1 FOOT AT 2 SECONDS.
SAT AND SAT NIGHT
S WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE
DETAIL: S 3 FT AT 9 SECONDS AND SW 2 FT AT 3 SECONDS.
SUN
S WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: S 3 FT AT
7 SECONDS AND SW 1 FOOT AT 4 SECONDS.
SUN NIGHT
SW WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. A CHANCE OF
SHOWERS.
MON
SW WINDS 5 TO 10 KT. SEAS 3 TO 5 FT. A CHANCE OF SHOWERS.
MON NIGHT
NW WINDS 5 TO 10 KT. SEAS 3 TO 5 FT.
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.
ANZ230-310300-
BOSTON HARBOR-
1004 AM EDT THU JUL 30 2026
THIS AFTERNOON
NE WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
WAVES 2 TO 3 FT. PATCHY FOG. SHOWERS LIKELY WITH A SLIGHT CHANCE
OF TSTMS. VSBY 1 TO 3 NM.
TONIGHT
N WINDS 5 TO 10 KT. WAVES AROUND 2 FT IN THE EVENING,
THEN 1 FOOT OR LESS. PATCHY FOG IN THE EVENING. A CHANCE OF
SHOWERS IN THE EVENING WITH VSBY 1 TO 3 NM.
FRI
NW WINDS AROUND 5 KT, BECOMING SE IN THE AFTERNOON. WAVES
1 FOOT OR LESS. PATCHY FOG IN THE MORNING WITH VSBY 1 TO 3 NM.
FRI NIGHT
SW WINDS AROUND 5 KT. WAVES 1 FOOT OR LESS.
SAT AND SAT NIGHT
SW WINDS 5 TO 10 KT. WAVES 1 FOOT OR LESS.
SUN
S WINDS 10 TO 15 KT. WAVES AROUND 2 FT.
SUN NIGHT
S WINDS 5 TO 10 KT. WAVES AROUND 2 FT. SHOWERS
LIKELY.
MON
SW WINDS AROUND 5 KT. WAVES 1 FOOT OR LESS. A CHANCE OF
SHOWERS.
MON NIGHT
W WINDS AROUND 5 KT. WAVES 1 FOOT OR LESS.
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.
ANZ236-310300-
NARRAGANSETT BAY-
1004 AM EDT THU JUL 30 2026
THIS AFTERNOON
N WINDS 10 TO 15 KT. GUSTS UP TO 20 KT. WAVES
2 TO 3 FT. PATCHY FOG. SHOWERS LIKELY. A CHANCE OF TSTMS, THEN A
SLIGHT CHANCE OF TSTMS WITH VSBY 1 TO 3 NM.
TONIGHT
N WINDS 5 TO 10 KT. WAVES 2 TO 3 FT.
FRI
NW WINDS AROUND 5 KT, BECOMING SW IN THE AFTERNOON. WAVES
AROUND 2 FT.
FRI NIGHT
SW WINDS 5 TO 10 KT. WAVES AROUND 2 FT.
SAT AND SAT NIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
WAVES AROUND 2 FT.
SUN
S WINDS 10 TO 15 KT. WAVES AROUND 2 FT.
SUN NIGHT
SW WINDS 5 TO 10 KT. WAVES AROUND 2 FT. A CHANCE OF
SHOWERS.
MON
SW WINDS 5 TO 10 KT. WAVES 2 TO 3 FT. A CHANCE OF SHOWERS.
MON NIGHT
NW WINDS 5 TO 10 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.
ANZ280-310300-
OCEAN WATERS FROM THE MERRIMACK RIVER TO PLYMOUTH FROM 40 TO
60 NM-
1004 AM EDT THU JUL 30 2026
THIS AFTERNOON
NE WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS 4 TO 5 FT. WAVE DETAIL: E 4 FT AT 6 SECONDS AND S 4 FT AT
9 SECONDS. PATCHY FOG. A CHANCE OF SHOWERS. A SLIGHT CHANCE OF
TSTMS. VSBY 1 NM OR LESS.
TONIGHT
N WINDS AROUND 10 KT. SEAS 4 TO 5 FT. WAVE DETAIL: SE
4 FT AT 7 SECONDS AND N 1 FOOT AT 2 SECONDS. PATCHY FOG. A CHANCE
OF SHOWERS IN THE EVENING. VSBY 1 NM OR LESS, INCREASING TO 1 TO
3 NM AFTER MIDNIGHT.
FRI
N WINDS 5 TO 10 KT, BECOMING NW IN THE AFTERNOON. SEAS
4 TO 5 FT. WAVE DETAIL: S 4 FT AT 9 SECONDS AND N 3 FT AT
5 SECONDS.
FRI NIGHT
SW WINDS 5 TO 10 KT. SEAS 3 TO 4 FT. WAVE DETAIL: S
3 FT AT 9 SECONDS AND NE 2 FT AT 6 SECONDS.
SAT AND SAT NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS 2 TO 3 FT. WAVE DETAIL: S 3 FT AT 9 SECONDS AND S 2 FT AT
4 SECONDS.
SUN
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS AROUND
3 FT. WAVE DETAIL: SE 3 FT AT 8 SECONDS AND S 2 FT AT 4 SECONDS.
SUN NIGHT AND MON
S WINDS 10 TO 15 KT, BECOMING SW 5 TO 10 KT.
GUSTS UP TO 20 KT. SEAS 2 TO 3 FT. A CHANCE OF SHOWERS.
MON NIGHT
W WINDS 5 TO 10 KT. SEAS 2 TO 4 FT.
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.
ANZ281-310300-
OCEAN WATERS FROM PROVINCETOWN TO NANTUCKET FROM 20 TO 60 NM-
1004 AM EDT THU JUL 30 2026
THIS AFTERNOON
S WINDS 5 TO 10 KT. SEAS AROUND 5 FT. WAVE
DETAIL: S 5 FT AT 8 SECONDS AND E 3 FT AT 6 SECONDS. PATCHY FOG.
A SLIGHT CHANCE OF SHOWERS. A CHANCE OF SHOWERS WITH A SLIGHT
CHANCE OF TSTMS. VSBY 1 NM OR LESS.
TONIGHT
NW WINDS 5 TO 10 KT. SEAS AROUND 5 FT. WAVE DETAIL: S
5 FT AT 9 SECONDS AND NE 3 FT AT 6 SECONDS. PATCHY FOG. VSBY 1 NM
OR LESS, INCREASING TO 1 TO 3 NM AFTER MIDNIGHT.
FRI
NW WINDS 5 TO 10 KT. SEAS 4 TO 5 FT. WAVE DETAIL: S 5 FT
AT 9 SECONDS AND N 3 FT AT 5 SECONDS.
FRI NIGHT
SW WINDS 5 TO 10 KT. SEAS 3 TO 5 FT. WAVE DETAIL: S
4 FT AT 9 SECONDS AND NE 2 FT AT 6 SECONDS.
SAT AND SAT NIGHT
S WINDS 5 TO 10 KT WITH GUSTS UP TO 20 KT.
SEAS 3 TO 4 FT. WAVE DETAIL: S 4 FT AT 9 SECONDS AND SW 2 FT AT
3 SECONDS.
SUN
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 3 TO
4 FT. WAVE DETAIL: S 3 FT AT 8 SECONDS AND SW 2 FT AT 4 SECONDS.
SUN NIGHT
S WINDS AROUND 10 KT WITH GUSTS UP TO 20 KT. SEAS
AROUND 3 FT. A CHANCE OF SHOWERS.
MON
SW WINDS AROUND 10 KT. SEAS 4 TO 6 FT. A CHANCE OF
SHOWERS.
MON NIGHT
W WINDS 5 TO 10 KT. SEAS 5 TO 7 FT.
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.
ANZ282-310300-
OCEAN WATERS FROM MARTHAS VINEYARD TO NANTUCKET FROM 25 TO 60 NM-
1004 AM EDT THU JUL 30 2026
THIS AFTERNOON
SW WINDS 5 TO 10 KT. SEAS 5 TO 6 FT. WAVE
DETAIL: S 5 FT AT 8 SECONDS AND NW 2 FT AT 3 SECONDS. PATCHY FOG.
A SLIGHT CHANCE OF SHOWERS AND TSTMS. VSBY 1 TO 3 NM.
TONIGHT
NW WINDS 5 TO 10 KT. SEAS 5 TO 6 FT. WAVE DETAIL: S
5 FT AT 8 SECONDS AND N 2 FT AT 5 SECONDS. PATCHY FOG. VSBY 1 TO
3 NM.
FRI
NW WINDS 5 TO 10 KT. SEAS 4 TO 5 FT. WAVE DETAIL: S 4 FT
AT 9 SECONDS AND NW 2 FT AT 4 SECONDS.
FRI NIGHT
W WINDS 5 TO 10 KT. SEAS AROUND 4 FT. WAVE DETAIL: S
4 FT AT 9 SECONDS AND NE 2 FT AT 6 SECONDS. PATCHY FOG IN THE
EVENING WITH VSBY 1 TO 3 NM.
SAT AND SAT NIGHT
S WINDS 5 TO 10 KT. SEAS 3 TO 4 FT. WAVE
DETAIL: S 3 FT AT 9 SECONDS AND NE 2 FT AT 6 SECONDS.
SUN
S WINDS 5 TO 10 KT. SEAS 3 TO 4 FT. WAVE DETAIL: S 3 FT AT
8 SECONDS AND SW 1 FOOT AT 4 SECONDS.
SUN NIGHT
S WINDS AROUND 10 KT. SEAS 3 TO 4 FT. A CHANCE OF
SHOWERS.
MON AND MON NIGHT
SW WINDS AROUND 10 KT, BECOMING W. SEAS 5 TO
8 FT. A CHANCE OF SHOWERS.
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.
ANZ283-310300-
OCEAN WATERS FROM MONTAUK NY TO MARTHAS VINEYARD FROM 25 TO 60 NM-
1004 AM EDT THU JUL 30 2026
THIS AFTERNOON
NW WINDS 5 TO 10 KT. SEAS AROUND 5 FT. WAVE
DETAIL: S 5 FT AT 8 SECONDS AND NW 3 FT AT 4 SECONDS. PATCHY FOG.
A SLIGHT CHANCE OF TSTMS. A CHANCE OF SHOWERS, THEN A SLIGHT
CHANCE OF SHOWERS. VSBY 1 TO 3 NM.
TONIGHT
NW WINDS AROUND 10 KT. SEAS 4 TO 5 FT. WAVE DETAIL: S
5 FT AT 8 SECONDS AND N 3 FT AT 5 SECONDS. PATCHY FOG IN THE
EVENING.
FRI
W WINDS 5 TO 10 KT. SEAS 4 TO 5 FT. WAVE DETAIL: S 4 FT AT
9 SECONDS AND N 2 FT AT 5 SECONDS.
FRI NIGHT
SW WINDS 5 TO 10 KT. SEAS 3 TO 4 FT. WAVE DETAIL: SW
3 FT AT 3 SECONDS AND S 3 FT AT 9 SECONDS.
SAT AND SAT NIGHT
S WINDS 5 TO 10 KT. SEAS 3 TO 4 FT. WAVE
DETAIL: S 3 FT AT 9 SECONDS AND SW 2 FT AT 3 SECONDS.
SUN
S WINDS 5 TO 10 KT. SEAS AROUND 3 FT. WAVE DETAIL: S 3 FT
AT 8 SECONDS AND SW 2 FT AT 4 SECONDS.
SUN NIGHT
S WINDS AROUND 10 KT. SEAS 3 TO 4 FT. A CHANCE OF
SHOWERS.
MON
SW WINDS AROUND 10 KT. SEAS 5 TO 7 FT. A CHANCE OF
SHOWERS.
MON NIGHT
W WINDS 5 TO 10 KT. SEAS 6 TO 9 FT.
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.
FOR THE LATEST UPDATES...PLEASE VISIT OUR WEBPAGE AT
WWW.WEATHER.GOV/BOSTON
YOU CAN FOLLOW US ON FACEBOOK AT
WWW.FACEBOOK.COM/US.NATIONALWEATHERSERVICE.BOSTON.GOV
YOU CAN FOLLOW US ON TWITTER AT
@NWSBOSTON
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page