

778 

FZCA52 TJSJ 220145

CWFSJU



Coastal Waters Forecast

National Weather Service San Juan PR

945 PM AST Mon Sep 21 2020



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.



AMZ700-221430-

945 PM AST Mon Sep 21 2020



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

Northeasterly swells generated by Hurricane Teddy has diminished 

somewhat, however, another swell train is expected from Tuesday 

through Friday night with swell greater than the previous event. 

Light to gentle southerly winds will prevail across the regional 

waters through the next few days. Showers and thunderstorms will

increase across the region Tuesday and Tuesday night.



$$



AMZ710-221430-

Atlantic Waters of Puerto Rico and USVI from 10 NM to 19.5N-

945 PM AST Mon Sep 21 2020



...SMALL CRAFT SHOULD EXERCISE CAUTION...

...SMALL CRAFT ADVISORY IN EFFECT FROM 8 AM AST TUESDAY THROUGH 

FRIDAY AFTERNOON...



.REST OF TONIGHT...South winds 5 to 10 knots. Seas 4 to 6 feet

with occasional seas up to 8 feet. Dominant period 11 seconds.

North swell 4 to 5 feet. Isolated showers through the night.

.TUESDAY...South winds 5 to 10 knots. Seas 6 to 8 feet with

occasional seas up to 10 feet. Dominant period 11 seconds. North

swell 4 to 7 feet. Isolated showers in the morning.

.TUESDAY NIGHT...South winds 5 to 10 knots. Seas 10 to 12 feet

with occasional seas up to 14 feet. Dominant period 13 seconds.

North swell 5 to 10 feet. Scattered showers and isolated

thunderstorms.

.WEDNESDAY...Southeast winds 5 to 10 knots. Seas 10 to 12 feet

with occasional seas up to 15 feet. Dominant period 13 seconds.

North swell 9 to 11 feet. Isolated showers.

.WEDNESDAY NIGHT...Southeast winds 5 to 10 knots. Seas 10 to 12

feet with occasional seas up to 15 feet. Dominant period 14

seconds. North swell 9 to 11 feet. Scattered showers.

.THURSDAY...East winds 5 to 10 knots. Seas 10 to 12 feet with

occasional seas up to 14 feet. Dominant period 14 seconds. North

swell 7 to 10 feet. Scattered showers.

.FRIDAY...East winds 5 to 10 knots. Seas 5 to 7 feet with

occasional seas up to 9 feet. Dominant period 12 seconds. North

swell 4 to 6 feet. Isolated showers.

.SATURDAY...East winds 5 to 10 knots. Seas 3 to 5 feet with

occasional seas up to 6 feet. Dominant period 11 seconds. North

swell around 4 feet. Isolated showers.



$$



AMZ712-221430-

Coastal Waters of Northern Puerto Rico out 10 NM-

945 PM AST Mon Sep 21 2020



...SMALL CRAFT SHOULD EXERCISE CAUTION...

...SMALL CRAFT ADVISORY IN EFFECT FROM TUESDAY AFTERNOON THROUGH

FRIDAY AFTERNOON...



.REST OF TONIGHT...South winds 5 to 10 knots. Seas 4 to 6 feet

with occasional seas up to 8 feet. Dominant period 11 seconds.

North swell 4 to 5 feet. Isolated showers through the night.

.TUESDAY...South winds 5 to 10 knots backing northeast in the

afternoon. Seas 5 to 7 feet with occasional seas up to 9 feet.

Dominant period 11 seconds. North swell 4 to 6 feet. Scattered

showers in the morning.

.TUESDAY NIGHT...Southeast winds 5 to 10 knots veering south after

midnight. Seas 8 to 10 feet with occasional seas up to 13 feet.

Dominant period 13 seconds. North swell 5 to 10 feet. Isolated

thunderstorms in the evening. Scattered showers through the night.

.WEDNESDAY...South winds 5 to 10 knots backing northeast in the

afternoon. Seas 10 to 12 feet with occasional seas up to 14 feet.

Dominant period 13 seconds. North swell 7 to 10 feet. Scattered

showers through the day. Isolated thunderstorms in the afternoon.

.WEDNESDAY NIGHT...East winds 5 to 10 knots veering southeast

after midnight. Seas 10 to 12 feet with occasional seas up to 14

feet. Dominant period 13 seconds. North swell 9 to 11 feet.

Scattered showers.

.THURSDAY...East winds 5 to 10 knots. Seas 10 to 12 feet with

occasional seas up to 14 feet. Dominant period 14 seconds. North

swell 7 to 10 feet. Isolated showers.

.FRIDAY...East winds 5 to 10 knots. Seas 5 to 7 feet with

occasional seas up to 9 feet. Dominant period 12 seconds. North

swell 4 to 6 feet. Isolated showers.

.SATURDAY...East winds 5 to 10 knots. Seas 3 to 5 feet with

occasional seas up to 6 feet. Dominant period 11 seconds. North

swell around 4 feet. Isolated showers.



$$



AMZ715-221430-

Coastal Waters of Northern USVI and Culebra out 10 NM-

945 PM AST Mon Sep 21 2020



...SMALL CRAFT ADVISORY IN EFFECT FROM TUESDAY EVENING THROUGH

FRIDAY AFTERNOON...



.REST OF TONIGHT...South winds 5 to 10 knots. Seas 3 to 5 feet

with occasional seas up to 6 feet. Dominant period 11 seconds.

North swell around 4 feet. Isolated showers.

.TUESDAY...South winds 5 to 10 knots. Seas 4 to 6 feet with

occasional seas up to 8 feet. Dominant period 11 seconds. North

swell 4 to 5 feet. Scattered showers in the morning, then isolated

thunderstorms in the afternoon.

.TUESDAY NIGHT...South winds 5 to 10 knots. Seas 8 to 10 feet with

occasional seas up to 11 feet. Dominant period 12 seconds. North

swell 4 to 8 feet. Isolated thunderstorms in the evening.

Scattered showers through the night.

.WEDNESDAY...Southeast winds 5 to 10 knots. Seas 8 to 10 feet with

occasional seas up to 13 feet. Dominant period 13 seconds. North

swell 4 to 9 feet. Isolated showers.

.WEDNESDAY NIGHT...Southeast winds 5 to 10 knots. Seas 10 to 12

feet with occasional seas up to 14 feet. Dominant period 13

seconds. North swell 5 to 10 feet. Scattered showers.

.THURSDAY...East winds 5 to 10 knots. Seas 8 to 10 feet with

occasional seas up to 11 feet. Dominant period 13 seconds. North

swell 5 to 10 feet. Scattered showers.

.FRIDAY...East winds 5 to 10 knots. Seas 4 to 7 feet with

occasional seas up to 8 feet. Dominant period 12 seconds. North

swell 4 to 6 feet. Scattered showers.

.SATURDAY...East winds 5 to 10 knots. Seas 3 to 5 feet with

occasional seas up to 6 feet. Dominant period 11 seconds. North

swell around 4 feet. Isolated showers.



$$



AMZ722-221430-

Anegada Passage Southward to 17N-

945 PM AST Mon Sep 21 2020



...SMALL CRAFT ADVISORY IN EFFECT FROM TUESDAY EVENING THROUGH

FRIDAY AFTERNOON...



.REST OF TONIGHT...South winds 5 to 10 knots. Seas 3 to 5 feet

with occasional seas up to 6 feet. Dominant period 11 seconds.

North swell around 4 feet. Isolated showers.

.TUESDAY...South winds 5 to 10 knots. Seas 3 to 5 feet with

occasional seas up to 6 feet. Dominant period 11 seconds. North

swell around 4 feet. Isolated showers.

.TUESDAY NIGHT...Southeast winds 5 to 10 knots. Seas 6 to 8 feet

with occasional seas up to 10 feet. Dominant period 12 seconds.

North swell 4 to 7 feet. Isolated showers through the night.

.WEDNESDAY...Southeast winds 5 to 10 knots. Seas 8 to 10 feet with

occasional seas up to 13 feet. Dominant period 12 seconds. North

swell 4 to 9 feet. Isolated showers.

.WEDNESDAY NIGHT...East winds 5 to 10 knots. Seas 10 to 12 feet

with occasional seas up to 14 feet. Dominant period 14 seconds.

North swell 5 to 10 feet. Scattered showers.

.THURSDAY...East winds 5 to 10 knots. Seas 6 to 8 feet with

occasional seas up to 10 feet. Dominant period 13 seconds. North

swell 4 to 9 feet. Scattered showers.

.FRIDAY...East winds around 10 knots. Seas 5 to 7 feet with

occasional seas up to 9 feet. Dominant period 13 seconds. North

swell 4 to 6 feet. Scattered showers.

.SATURDAY...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.



$$



AMZ725-221430-

Coastal Waters of Southern USVI Vieques and Eastern Puerto Rico out

10 NM-

945 PM AST Mon Sep 21 2020



...SMALL CRAFT ADVISORY IN EFFECT FROM TUESDAY EVENING THROUGH

FRIDAY AFTERNOON...



.REST OF TONIGHT...South 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.

.TUESDAY...South 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 in the morning,

then isolated thunderstorms in the afternoon.

.TUESDAY NIGHT...South winds 5 to 10 knots. Seas 4 to 6 feet with

occasional seas up to 8 feet. Dominant period 11 seconds.

Northeast swell 4 to 5 feet. Scattered showers.

.WEDNESDAY...Southeast winds 5 to 10 knots. Seas 6 to 8 feet with

occasional seas up to 10 feet. Dominant period 12 seconds.

Northeast swell 4 to 7 feet. Isolated showers in the morning, then

isolated thunderstorms in the afternoon.

.WEDNESDAY NIGHT...Southeast winds 5 to 10 knots. Seas 8 to 10

feet with occasional seas up to 11 feet. Dominant period 12

seconds. Northeast swell 4 to 8 feet. Scattered showers.

.THURSDAY...East winds 5 to 10 knots. Seas 5 to 7 feet with

occasional seas up to 9 feet. Dominant period 12 seconds.

Northeast swell 4 to 8 feet. Scattered showers.

.FRIDAY...East winds 5 to 10 knots. Seas 4 to 7 feet with

occasional seas up to 6 feet. Dominant period 12 seconds. East

swell 4 to 5 feet. Scattered showers.

.SATURDAY...East 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. Isolated showers.



$$



AMZ732-221430-

Caribbean Waters of Puerto Rico from 10 NM to 17N-

945 PM AST Mon Sep 21 2020



.REST OF TONIGHT...South winds 5 to 10 knots. Seas 1 to 3 feet.

Dominant period 11 seconds. Isolated showers.

.TUESDAY...South winds 5 to 10 knots. Seas 1 to 3 feet. Dominant

period 10 seconds. Isolated showers.

.TUESDAY NIGHT...Southeast 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 after midnight. Isolated showers.

.WEDNESDAY...Southeast winds 5 to 10 knots. Seas 3 to 5 feet with

occasional seas up to 6 feet. Dominant period 11 seconds. North

swell 4 to 5 feet. Isolated showers.

.WEDNESDAY NIGHT...East winds 5 to 10 knots. Seas 4 to 6 feet with

occasional seas up to 8 feet. Dominant period 12 seconds.

Northeast swell 4 to 5 feet. Isolated showers.

.THURSDAY...East winds 10 to 15 knots. Seas 4 to 6 feet with

occasional seas up to 8 feet. Dominant period 12 seconds. North

swell 4 to 5 feet. Isolated showers.

.FRIDAY...East winds 10 to 15 knots. Seas 2 to 4 feet with

occasional seas up to 5 feet. Dominant period 12 seconds. East

swell around 4 feet. Isolated showers.

.SATURDAY...East winds 5 to 10 knots. Seas 2 to 4 feet with

occasional seas up to 5 feet. Dominant period 11 seconds. Isolated

showers.



$$



AMZ735-221430-

Coastal Waters of Southern Puerto Rico out 10 NM-

945 PM AST Mon Sep 21 2020



.REST OF TONIGHT...Southeast winds 5 to 10 knots. Seas 2 feet or

less. Dominant period 11 seconds. Isolated showers.

.TUESDAY...South winds 5 to 10 knots. Seas 1 to 3 feet. Dominant

period 11 seconds. Scattered showers through the day. Isolated

thunderstorms in the afternoon.

.TUESDAY NIGHT...Southeast winds 5 to 10 knots. Seas 3 to 5 feet

with occasional seas up to 6 feet. Dominant period 11 seconds.

South swell around 4 feet after midnight. Scattered showers.

.WEDNESDAY...Southeast winds 5 to 10 knots. Seas 4 to 6 feet with

occasional seas up to 8 feet. Dominant period 11 seconds. South

swell 4 to 5 feet. Isolated showers.

.WEDNESDAY NIGHT...East winds 5 to 10 knots. Seas 4 to 6 feet with

occasional seas up to 8 feet. Dominant period 11 seconds. South

swell 4 to 5 feet. Isolated showers.

.THURSDAY...East winds 5 to 10 knots. Seas 3 to 5 feet with

occasional seas up to 6 feet. Dominant period 12 seconds.

Southeast swell 4 to 5 feet. Isolated showers.

.FRIDAY...East winds 10 to 15 knots. Seas 3 to 5 feet with

occasional seas up to 6 feet. Dominant period 12 seconds.

Southeast swell around 4 feet. Isolated showers.

.SATURDAY...East winds 5 to 10 knots. Seas 1 to 3 feet. Dominant

period 11 seconds. Isolated showers.



$$



AMZ741-221430-

Mona Passage Southward to 17N-

945 PM AST Mon Sep 21 2020



...SMALL CRAFT SHOULD EXERCISE CAUTION...

...SMALL CRAFT ADVISORY IN EFFECT FROM TUESDAY EVENING THROUGH 

FRIDAY EVENING...



.REST OF TONIGHT...Southeast winds 5 to 10 knots. Seas 4 to 6 feet

with occasional seas up to 8 feet. Dominant period 12 seconds.

North swell 4 to 5 feet. Isolated showers.

.TUESDAY...South winds 5 to 10 knots. Seas 4 to 6 feet with

occasional seas up to 8 feet. Dominant period 11 seconds. North

swell 4 to 5 feet. Scattered showers.

.TUESDAY NIGHT...Southeast winds 5 to 10 knots. Seas 8 to 10 feet

with occasional seas up to 13 feet. Dominant period 12 seconds.

North swell 4 to 9 feet. Isolated showers through the night.

.WEDNESDAY...Southeast winds 5 to 10 knots. Seas 8 to 10 feet with

occasional seas up to 13 feet. Dominant period 13 seconds. North

swell 5 to 10 feet. Isolated showers.

.WEDNESDAY NIGHT...East winds 5 to 10 knots. Seas 10 to 12 feet

with occasional seas up to 15 feet. Dominant period 13 seconds.

North swell 6 to 11 feet. Isolated showers.

.THURSDAY...East winds 5 to 10 knots. Seas 8 to 10 feet with

occasional seas up to 13 feet. Dominant period 13 seconds. North

swell 6 to 11 feet. Isolated showers.

.FRIDAY...East winds 10 to 15 knots. Seas 5 to 7 feet with

occasional seas up to 9 feet. Dominant period 13 seconds. North

swell 4 to 8 feet. Isolated showers.

.SATURDAY...East winds 5 to 10 knots. Seas 3 to 5 feet with

occasional seas up to 6 feet. Dominant period 11 seconds. North

swell 4 to 5 feet. Isolated showers.



$$



AMZ742-221430-

Coastal Waters of Northwestern Puerto Rico out 10 NM-

945 PM AST Mon Sep 21 2020



...SMALL CRAFT SHOULD EXERCISE CAUTION...

...SMALL CRAFT ADVISORY IN EFFECT FROM TUESDAY EVENING THROUGH

FRIDAY EVENING...



.REST OF TONIGHT...Southeast winds 5 to 10 knots. Seas 4 to 6 feet

with occasional seas up to 8 feet. Dominant period 11 seconds.

North swell 4 to 5 feet.

.TUESDAY...South winds 5 to 10 knots. Seas 4 to 6 feet with

occasional seas up to 8 feet. Dominant period 11 seconds. North

swell 4 to 5 feet. Scattered showers.

.TUESDAY NIGHT...South winds 5 to 10 knots. Seas 8 to 10 feet with

occasional seas up to 11 feet. Dominant period 12 seconds. North

swell 4 to 8 feet. Scattered showers through the night. Isolated

thunderstorms after midnight.

.WEDNESDAY...South winds 5 to 10 knots. Seas 8 to 10 feet with

occasional seas up to 13 feet. Dominant period 13 seconds. North

swell 4 to 9 feet. Scattered showers through the day. Isolated

thunderstorms in the afternoon.

.WEDNESDAY NIGHT...East winds 5 to 10 knots. Seas 10 to 12 feet

with occasional seas up to 14 feet. Dominant period 13 seconds.

North swell 4 to 9 feet. Isolated showers.

.THURSDAY...East winds 5 to 10 knots. Seas 6 to 8 feet with

occasional seas up to 10 feet. Dominant period 14 seconds. North

swell 4 to 8 feet. Isolated showers.

.FRIDAY...East winds 5 to 10 knots. Seas 4 to 7 feet with

occasional seas up to 8 feet. Dominant period 13 seconds. North

swell 4 to 7 feet. Isolated showers.

.SATURDAY...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.



$$



AMZ745-221430-

Coastal Waters of Southwestern Puerto Rico out 10 NM-

945 PM AST Mon Sep 21 2020



...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TUESDAY NIGHT THROUGH

FRIDAY EVENING...



.REST OF TONIGHT...Southeast winds 5 to 10 knots. Seas 1 to 3

feet. Dominant period 12 seconds. Isolated showers.

.TUESDAY...South 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 in the afternoon. Scattered showers.

.TUESDAY NIGHT...Southeast winds 5 to 10 knots. Seas 6 to 8 feet

with occasional seas up to 10 feet. Dominant period 12 seconds.

North swell 4 to 7 feet. Scattered showers.

.WEDNESDAY...Southeast winds 5 to 10 knots. Seas 8 to 10 feet with

occasional seas up to 13 feet. Dominant period 13 seconds. North

swell 4 to 9 feet. Isolated showers.

.WEDNESDAY NIGHT...East winds 5 to 10 knots. Seas 8 to 10 feet

with occasional seas up to 13 feet. Dominant period 13 seconds.

North swell 4 to 9 feet. Isolated showers.

.THURSDAY...East winds 5 to 10 knots. Seas 6 to 8 feet with

occasional seas up to 10 feet. Dominant period 14 seconds. North

swell 4 to 9 feet. Isolated showers.

.FRIDAY...East winds 5 to 10 knots. Seas 4 to 7 feet with

occasional seas up to 8 feet. Dominant period 13 seconds. North

swell 4 to 7 feet. Isolated showers.

.SATURDAY...East winds 5 to 10 knots. Seas 2 to 4 feet with

occasional seas up to 5 feet. Dominant period 12 seconds.

Northwest swell around 4 feet. Isolated showers.



$$

