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Hurricane Symbol Storm Special! View the latest observations near Atlantic Tropical Storm Peter and Atlantic Tropical Storm Rose.

National Weather Service Marine Forecast FZCA52 TJSJ

FZCA52 TJSJ 200753
CWFSJU

Coastal Waters Forecast
National Weather Service San Juan PR
353 AM AST Mon Sep 20 2021

Puerto Rico and the U.S. Virgin Islands Waters

Seas are provided as a range of the average height of the
highest 1/3 of the Seas...Along with the occasional height
of the average highest 10 percent of the Seas.

AMZ700-202045-
353 AM AST Mon Sep 20 2021

SYNOPSIS FOR PUERTO RICO AND THE U.S. VIRGIN ISLANDS WATERS

Gentle to moderate east to northeast winds will prevail today.
Deteriorating marine conditions, due to the passage of Tropical Storm
Peter well northeast of the local islands, this afternoon, mostly
for the offshore Atlantic waters into the Anegada Passage. An
increase in shower and thunderstorm activity is also expected today
through Tuesday.



AMZ710-202045-
Atlantic Waters of Puerto Rico and USVI from 10 NM to 19.5N-
353 AM AST Mon Sep 20 2021

...SMALL CRAFT ADVISORY IN EFFECT FROM 2 PM AST THIS AFTERNOON
THROUGH TUESDAY EVENING...

TODAY
Northeast winds 10 to 15 knots. Seas 6 to 8 feet with
occasional seas up to 10 feet. Dominant period 10 seconds.
Northeast swell around 4 feet in the afternoon. Scattered showers
and isolated thunderstorms.

TONIGHT
Northeast winds 10 to 15 knots. Seas 6 to 8 feet with
occasional seas up to 10 feet. Dominant period 10 seconds.
Northeast swell around 4 feet. Numerous showers and isolated
thunderstorms.

TUESDAY
Southwest winds 10 to 15 knots. Seas 5 to 7 feet with
occasional seas up to 9 feet. Dominant period 10 seconds.
Northeast swell around 4 Feet. Numerous showers and isolated
thunderstorms.

TUESDAY NIGHT
South winds 5 to 10 knots. Seas 4 to 6 feet with
occasional seas up to 8 feet. Dominant period 10 seconds. Numerous
showers and isolated thunderstorms.

WEDNESDAY
Southeast winds 5 to 10 knots. Seas 2 to 4 feet with
occasional seas up to 5 feet. Dominant period 11 seconds. East
swell around 4 feet. Scattered showers.

THURSDAY
Southeast winds 5 to 10 knots. Seas 3 to 5 feet with
occasional seas up to 6 feet. Dominant period 12 seconds. North
swell around 4 feet. Isolated showers.

FRIDAY
East winds 5 to 10 knots. Seas 3 to 5 feet with
occasional seas up to 6 feet. Dominant period 11 seconds.
Northeast swell around 4 feet. Isolated showers.



AMZ712-202045-
Coastal Waters of Northern Puerto Rico out 10 NM-
353 AM AST Mon Sep 20 2021

TODAY
Northeast winds 5 to 10 knots. Seas 1 to 3 feet. Dominant
period 8 seconds. Scattered showers and isolated thunderstorms.

TONIGHT
Northeast winds 5 to 10 knots. Seas 3 to 5 feet with
occasional seas up to 6 feet. Dominant period 10 seconds. Numerous
showers and isolated thunderstorms.

TUESDAY
West winds 5 to 10 knots. Seas 4 to 6 feet with
occasional seas up to 8 feet. Dominant period 10 seconds. Numerous
showers and isolated thunderstorms.

TUESDAY NIGHT
South winds 5 to 10 knots. Seas 4 to 6 feet with
occasional seas up to 8 feet. Dominant period 10 seconds. Isolated
thunderstorms in the evening. Scattered showers through the night.

WEDNESDAY
Southeast winds 5 to 10 knots. Seas 2 to 4 feet with
occasional seas up to 5 feet. Dominant period 8 seconds. Isolated
thunderstorms, then isolated showers.

THURSDAY
Southeast winds 5 to 10 knots. Seas 2 to 4 feet with
occasional seas up to 5 feet. Dominant period 12 seconds. North
swell around 4 feet. Isolated thunderstorms. Scattered showers.

FRIDAY
East winds 5 to 10 knots. Seas 3 to 5 feet with
occasional seas up to 6 feet. Dominant period 12 seconds. North
swell around 4 feet. Isolated thunderstorms, then isolated
showers.



AMZ715-202045-
Coastal Waters of Northern USVI and Culebra out 10 NM-
353 AM AST Mon Sep 20 2021

SMALL CRAFT SHOULD EXERCISE CAUTION


TODAY
Northeast winds 5 to 10 knots. Seas 4 to 6 feet with
occasional seas up to 8 feet. Dominant period 11 seconds. Numerous
showers and isolated thunderstorms.

TONIGHT
Northeast winds 5 to 10 knots backing southwest after
midnight. Seas 4 to 6 feet with occasional seas up to 8 feet.
Dominant period 10 seconds. Numerous showers and isolated
thunderstorms.

TUESDAY
South winds 10 to 15 knots. Seas 3 to 5 feet with
occasional seas up to 6 feet. Dominant period 8 seconds. Showers
and isolated thunderstorms.

TUESDAY NIGHT
South winds 5 to 10 knots. Seas 3 to 5 feet with
occasional seas up to 6 feet. Dominant period 8 seconds. Scattered
showers and isolated thunderstorms.

WEDNESDAY
Southeast winds 5 to 10 knots. Seas 1 to 3 feet.
Dominant period 10 seconds. Scattered showers.

THURSDAY
Southeast winds 5 to 10 knots. Seas 2 to 4 feet with
occasional seas up to 5 feet. Dominant period 12 seconds.
Northeast swell around 4 feet. Scattered showers.

FRIDAY
East winds 5 to 10 knots. Seas 3 to 5 feet with
occasional seas up to 6 feet. Dominant period 11 seconds.
Northeast swell around 4 feet. Isolated showers.



AMZ722-202045-
Anegada Passage Southward to 17N-
353 AM AST Mon Sep 20 2021

...SMALL CRAFT ADVISORY IN EFFECT FROM 2 PM AST THIS AFTERNOON
UNTIL TUESDAY MORNING...

TODAY
Northeast winds 5 to 10 knots. Seas 5 to 7 feet with
occasional seas up to 9 feet. Dominant period 11 seconds. Numerous
showers and isolated thunderstorms.

TONIGHT
Northwest winds 5 to 10 knots backing south after
midnight. Seas 5 to 7 feet with occasional seas up to 9 feet.
Dominant period 10 seconds. Numerous showers and isolated
thunderstorms.

TUESDAY
South winds around 10 knots. Seas 3 to 5 feet with
occasional seas up to 6 feet. Dominant period 8 seconds. Numerous
showers and isolated thunderstorms.

TUESDAY NIGHT
Southeast winds around 10 knots. Seas 2 to 4 feet
with occasional seas up to 5 feet. Dominant period 8 seconds.
Scattered showers and isolated thunderstorms.

WEDNESDAY
Southeast winds around 10 knots. Seas 2 to 4 feet
with occasional seas up to 5 feet. Dominant period 11 seconds.
Scattered showers.

THURSDAY
East winds around 10 knots. Seas 3 to 5 feet with
occasional seas up to 6 feet. Dominant period 12 seconds. North
swell around 4 feet. Scattered showers.

FRIDAY
East winds around 10 knots. Seas 2 to 4 feet with
occasional seas up to 5 feet. Dominant period 11 seconds. North
swell around 4 feet. Isolated showers.



AMZ725-202045-
Coastal Waters of Southern USVI Vieques and Eastern Puerto Rico out
10 NM-
353 AM AST Mon Sep 20 2021

SMALL CRAFT SHOULD EXERCISE CAUTION


TODAY
Northeast winds 5 to 10 knots. Seas 4 to 6 feet with
occasional seas up to 8 feet. Dominant period 11 seconds. Numerous
showers and isolated thunderstorms.

TONIGHT
Northeast winds 5 to 10 knots backing west after
midnight. Seas 4 to 6 feet with occasional seas up to 8 feet.
Dominant period 10 seconds. Numerous showers and isolated
thunderstorms.

TUESDAY
South winds 10 to 15 knots. Seas 3 to 5 feet with
occasional seas up to 6 feet. Dominant period 10 seconds. Numerous
showers and isolated thunderstorms.

TUESDAY NIGHT
South winds 5 to 10 knots. Seas 2 to 4 feet with
occasional seas up to 5 feet. Dominant period 8 seconds. Scattered
showers and isolated thunderstorms.

WEDNESDAY
Southeast winds 5 to 10 knots. Seas 1 to 3 feet.
Dominant period 8 seconds. Scattered showers.

THURSDAY
Southeast winds 5 to 10 knots. Seas 1 to 3 feet.
Dominant period 12 seconds. Scattered showers.

FRIDAY
East winds 5 to 10 knots. Seas 2 to 4 feet with
occasional seas up to 5 feet. Dominant period 11 seconds.
Scattered showers.



AMZ732-202045-
Caribbean Waters of Puerto Rico from 10 NM to 17N-
353 AM AST Mon Sep 20 2021

TODAY
Northeast winds 5 to 10 knots. Seas 2 to 4 feet with
occasional seas up to 5 feet. Dominant period 11 seconds. Numerous
showers and isolated thunderstorms.

TONIGHT
North winds 5 to 10 knots veering southeast after
midnight. Seas 3 to 5 feet with occasional seas up to 6 feet.
Dominant period 10 seconds. Scattered showers and isolated
thunderstorms.

TUESDAY
South winds 5 to 10 knots. Seas 2 to 4 feet with
occasional seas up to 5 feet. Dominant period 10 seconds. Numerous
showers and isolated thunderstorms.

TUESDAY NIGHT
Southeast winds 5 to 10 knots. Seas 2 to 4 feet
with occasional seas up to 5 feet. Dominant period 10 seconds.
Isolated thunderstorms through the night. Scattered showers after
midnight.

WEDNESDAY
Southeast winds 5 to 10 knots. Seas 1 to 3 feet.
Dominant period 10 seconds. Isolated showers.

THURSDAY
East winds 5 to 10 knots. Seas 2 to 4 feet with
occasional seas up to 5 feet. Dominant period 12 seconds. Isolated
showers.

FRIDAY
East winds 5 to 10 knots. Seas 2 to 4 feet with
occasional seas up to 5 feet. Dominant period 11 seconds.
Northeast swell around 4 feet. Isolated showers.



AMZ735-202045-
Coastal Waters of Southern Puerto Rico out 10 NM-
353 AM AST Mon Sep 20 2021

TODAY
East winds 5 to 10 knots. Seas 2 feet or less. Dominant
period 8 seconds. Scattered showers and isolated thunderstorms.

TONIGHT
Northeast winds 5 to 10 knots. Seas 2 feet or less.
Dominant period 10 seconds. Scattered showers and isolated
thunderstorms.

TUESDAY
Southwest winds 5 to 10 knots. Seas 1 to 3 feet.
Dominant period 10 seconds. Isolated thunderstorms through the
day. Numerous showers in the afternoon.

TUESDAY NIGHT
South winds 5 to 10 knots. Seas 1 to 3 feet.
Dominant period 10 seconds. Scattered showers.

WEDNESDAY
Southeast winds 5 to 10 knots. Seas 1 to 3 feet.
Dominant period 8 seconds. Isolated showers.

THURSDAY
East winds 5 to 10 knots. Seas 2 feet or less.
Dominant period 8 seconds. Isolated showers.

FRIDAY
East winds 5 to 10 knots. Seas 2 feet or less. Dominant
period 10 seconds. Isolated showers.



AMZ741-202045-
Mona Passage Southward to 17N-
353 AM AST Mon Sep 20 2021

TODAY
Northeast winds 5 to 10 knots. Seas 1 to 3 feet. Dominant
period 11 seconds. Isolated showers in the morning.

TONIGHT
Northeast winds 5 to 10 knots. Seas 1 to 3 feet.
Dominant period 11 seconds. Isolated showers.

TUESDAY
Northeast winds 5 to 10 knots veering south in the
afternoon. Seas 2 to 4 feet with occasional seas up to 5 feet.
Dominant period 11 seconds. Scattered showers through the day.
Isolated thunderstorms in the afternoon.

TUESDAY NIGHT
South winds 5 to 10 knots. Seas 3 to 5 feet with
occasional seas up to 6 feet. Dominant period 10 seconds. Isolated
showers.

WEDNESDAY
Southeast winds 5 to 10 knots. Seas 2 to 4 feet with
occasional seas up to 5 feet. Dominant period 10 seconds. Isolated
showers.

THURSDAY
Southeast winds 5 to 10 knots. Seas 2 to 4 feet with
occasional seas up to 5 feet. Dominant period 12 seconds. Isolated
showers.

FRIDAY
East winds 5 to 10 knots. Seas 2 to 4 feet with
occasional seas up to 5 feet. Dominant period 11 seconds. North
swell around 4 feet. Isolated showers.



AMZ742-202045-
Coastal Waters of Northwestern Puerto Rico out 10 NM-
353 AM AST Mon Sep 20 2021

TODAY
Northeast winds 5 to 10 knots. Seas 1 to 3 feet. Dominant
period 11 seconds. Scattered showers through the day. Isolated
thunderstorms in the afternoon.

TONIGHT
Northeast winds 5 to 10 knots. Seas 1 to 3 feet.
Dominant period 11 seconds. Scattered showers and isolated
thunderstorms.

TUESDAY
Northeast winds 5 to 10 knots backing west in the
afternoon. Seas 2 to 4 feet with occasional seas up to 5 feet.
Dominant period 10 seconds. Numerous showers and isolated
thunderstorms.

TUESDAY NIGHT
South winds 5 to 10 knots. Seas 2 to 4 feet with
occasional seas up to 5 feet. Dominant period 8 seconds. Isolated
thunderstorms in the evening. Scattered showers through the night.

WEDNESDAY
Southeast winds 5 to 10 knots. Seas 2 to 4 feet with
occasional seas up to 5 feet. Dominant period 10 seconds. Isolated
showers.

THURSDAY
Southeast winds 5 to 10 knots. Seas 1 to 3 feet.
Dominant period 12 seconds. Isolated thunderstorms. Scattered
showers.

FRIDAY
East winds 5 to 10 knots. Seas 2 to 4 feet with
occasional seas up to 5 feet. Dominant period 12 seconds. North
swell around 4 feet. Isolated thunderstorms, then isolated
showers.



AMZ745-202045-
Coastal Waters of Southwestern Puerto Rico out 10 NM-
353 AM AST Mon Sep 20 2021

TODAY
Northeast winds 5 to 10 knots backing north in the
afternoon. Seas 2 feet or less. Dominant period 11 seconds.
Scattered showers through the day. Isolated thunderstorms in the
afternoon.

TONIGHT
Northeast winds 5 to 10 knots. Seas 2 feet or less.
Dominant period 11 seconds. Isolated thunderstorms in the evening.
Scattered showers through the night.

TUESDAY
North winds 5 to 10 knots backing southwest in the
afternoon. Seas 1 foot or less. Dominant period 10 seconds.
Numerous showers through the day. Isolated thunderstorms in the
afternoon.

TUESDAY NIGHT
Southeast winds 5 to 10 knots. Seas 2 feet or
less. Dominant period 8 seconds. Scattered showers.

WEDNESDAY
Southeast winds 5 to 10 knots. Seas 2 feet or less.
Dominant period 8 seconds. Isolated showers.

THURSDAY
Southeast winds 5 to 10 knots. Seas 2 feet or less.
Dominant period 11 seconds. Isolated showers.

FRIDAY
East winds 5 to 10 knots. Seas 1 to 3 feet. Dominant
period 13 seconds. Isolated showers.