

579 

FZCA52 TJSJ 281359

CWFSJU



Coastal Waters Forecast

National Weather Service San Juan PR

959 AM AST Thu Jan 28 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.



AMZ700-290230-

959 AM AST Thu Jan 28 2021



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

A weak surface high pressure across the central Atlantic will result

in moderate trade winds through Friday. Winds will increase during

the weekend as a front moves across the offshore Atlantic waters.

Seas will gradually improve through tomorrow. However, a long period

northerly swell is forecast to invade the Atlantic waters beginning 

late Friday night and continuing into early next week. This will 

result in very hazardous seas through the upcoming weekend across the

Atlantic waters and passages.



$$



AMZ710-290230-

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

959 AM AST Thu Jan 28 2021



...SMALL CRAFT SHOULD EXERCISE CAUTION...



.REST OF TODAY...East winds 10 to 15 knots. Seas 4 to 6 feet with

occasional seas up to 8 feet. Dominant period 10 seconds. Isolated

showers through the day.

.TONIGHT...Northeast winds 5 to 10 knots. Seas 3 to 5 feet with

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

swell around 4 feet after midnight. Isolated showers through the

night.

.FRIDAY...Northeast 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 through the day.

.FRIDAY NIGHT...Northeast winds 15 to 20 knots. Seas 10 to 12 feet

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

North swell 4 to 9 feet. Scattered showers.

.SATURDAY...Northeast winds 15 to 20 knots. Seas 10 to 12 feet

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

North swell 8 to 11 feet. Scattered showers.

.SUNDAY...East winds 15 to 20 knots. Seas 8 to 10 feet with

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

swell 9 to 10 feet. Scattered showers.

.MONDAY...Southeast winds 10 to 15 knots. Seas 8 to 10 feet with

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

swell 5 to 9 feet. Isolated showers.



$$



AMZ712-290230-

Coastal Waters of Northern Puerto Rico out 10 NM-

959 AM AST Thu Jan 28 2021



.REST OF TODAY...East winds 10 to 15 knots. Seas 3 to 5 feet with

occasional seas up to 6 feet. Dominant period 10 seconds. Isolated

showers.

.TONIGHT...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.

.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 showers.

.FRIDAY NIGHT...Northeast winds 10 to 15 knots. Seas 2 to 4 feet

with occasional seas up to 5 feet building to 8 to 10 feet with

occasional seas up to 11 feet after midnight. Dominant period 14

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

.SATURDAY...Northeast winds 15 to 20 knots. Seas 8 to 10 feet with

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

swell 5 to 10 feet. Numerous showers.

.SUNDAY...East winds 15 to 20 knots. Seas 8 to 10 feet with

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

swell 8 to 10 feet. Numerous showers.

.MONDAY...Southeast winds 10 to 15 knots. Seas 8 to 10 feet with

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

swell 5 to 9 feet. Isolated showers.



$$



AMZ715-290230-

Coastal Waters of Northern USVI and Culebra out 10 NM-

959 AM AST Thu Jan 28 2021



...SMALL CRAFT SHOULD EXERCISE CAUTION...



.REST OF TODAY...East winds 10 to 15 knots. Seas 4 to 6 feet with

occasional seas up to 8 feet. Dominant period 10 seconds. Isolated

showers.

.TONIGHT...Northeast winds 5 to 10 knots. Seas 3 to 5 feet with

occasional seas up to 6 feet. Dominant period 10 seconds. Isolated

showers.

.FRIDAY...Northeast winds 5 to 10 knots. Seas 2 to 4 feet with

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

showers.

.FRIDAY NIGHT...Northeast winds 10 to 15 knots. Seas 2 to 4 feet

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

Scattered showers.

.SATURDAY...Northeast winds 15 to 20 knots. Seas 6 to 8 feet with

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

swell 5 to 10 feet. Numerous showers.

.SUNDAY...East winds 15 to 20 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.

.MONDAY...Southeast winds 10 to 15 knots. Seas 6 to 8 feet with

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

swell 4 to 9 feet. Isolated showers.



$$



AMZ722-290230-

Anegada Passage Southward to 17N-

959 AM AST Thu Jan 28 2021



...SMALL CRAFT SHOULD EXERCISE CAUTION...



.REST OF TODAY...East winds 10 to 15 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 day.

.TONIGHT...Northeast 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 through the night.

.FRIDAY...Northeast 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. Scattered showers.

.FRIDAY NIGHT...Northeast winds 10 to 15 knots. Seas 3 to 5 feet

with occasional seas up to 6 feet. Dominant period 14 seconds.

North swell around 4 feet after midnight. Scattered showers.

.SATURDAY...Northeast winds 10 to 15 knots. Seas 6 to 8 feet with

occasional seas up to 10 feet. Dominant period 15 seconds. North

swell 4 to 9 feet. Numerous showers.

.SUNDAY...East winds 15 to 20 knots. Seas 8 to 10 feet with

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

swell 7 to 9 feet. Isolated showers.

.MONDAY...Southeast winds 15 to 20 knots. Seas 8 to 10 feet with

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

swell 6 to 8 feet. Isolated showers.



$$



AMZ725-290230-

Coastal Waters of Southern USVI Vieques and Eastern Puerto Rico out

10 NM-

959 AM AST Thu Jan 28 2021



.REST OF TODAY...East winds 10 to 15 knots. Seas 3 to 5 feet with

occasional seas up to 6 feet. Dominant period 10 seconds. Isolated

showers.

.TONIGHT...Northeast winds 5 to 10 knots. Seas 2 to 4 feet with

occasional seas up to 5 feet. Dominant period 10 seconds. Isolated

showers.

.FRIDAY...Northeast winds 5 to 10 knots. Seas 2 to 4 feet with

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

showers through the day.

.FRIDAY NIGHT...Northeast winds 10 to 15 knots. Seas 2 to 4 feet

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

Scattered showers.

.SATURDAY...Northeast winds 15 to 20 knots. Seas 5 to 7 feet with

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

swell 4 to 8 feet. Numerous showers.

.SUNDAY...East winds 15 to 20 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.

.MONDAY...Southeast winds 10 to 15 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.



$$



AMZ732-290230-

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

959 AM AST Thu Jan 28 2021



.REST OF TODAY...East winds 10 to 15 knots. Seas 3 to 5 feet with

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

Northeast swell around 4 feet in the afternoon. Isolated showers

through the day.

.TONIGHT...Northeast winds 5 to 10 knots. Seas 3 to 5 feet with

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

swell around 4 feet in the evening. Isolated showers.

.FRIDAY...Northeast winds 5 to 10 knots. Seas 2 to 4 feet with

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

showers.

.FRIDAY NIGHT...Northeast 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 after midnight. Scattered showers.

.SATURDAY...Northeast winds 15 to 20 knots. Seas 4 to 6 feet with

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

swell 4 to 7 feet. Numerous showers.

.SUNDAY...East winds 15 to 20 knots. Seas 5 to 7 feet with

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

swell 4 to 7 feet. Isolated showers.

.MONDAY...East winds 15 to 20 knots. Seas 5 to 7 feet with

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

Northeast swell 4 to 7 feet. Isolated showers.



$$



AMZ735-290230-

Coastal Waters of Southern Puerto Rico out 10 NM-

959 AM AST Thu Jan 28 2021



.REST OF TODAY...East winds 10 to 15 knots. Seas 2 to 4 feet with

occasional seas up to 5 feet. Dominant period 8 seconds. Isolated

showers.

.TONIGHT...Northeast winds 5 to 10 knots. Seas 2 to 4 feet with

occasional seas up to 5 feet. Dominant period 7 seconds. Isolated

showers through the night.

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

period 7 seconds. Isolated showers.

.FRIDAY NIGHT...Northeast winds 5 to 10 knots. Seas 1 to 3 feet.

Dominant period 7 seconds. Scattered showers through the night.

.SATURDAY...Northeast winds 10 to 15 knots. Seas 3 to 5 feet with

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

swell 4 to 5 feet. Scattered showers.

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

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

Southeast swell 4 to 5 feet. Isolated showers.

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

occasional seas up to 8 feet. Dominant period 10 seconds. Isolated

showers.



$$



AMZ741-290230-

Mona Passage Southward to 17N-

959 AM AST Thu Jan 28 2021



...SMALL CRAFT SHOULD EXERCISE CAUTION...



.REST OF TODAY...East winds 10 to 15 knots. Seas 4 to 6 feet with

occasional seas up to 8 feet. Dominant period 10 seconds. Isolated

showers through the day.

.TONIGHT...Northeast winds 5 to 10 knots. Seas 3 to 5 feet with

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

showers through the night.

.FRIDAY...Northeast winds 5 to 10 knots. Seas 2 to 4 feet with

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

showers.

.FRIDAY NIGHT...Northeast winds 10 to 15 knots. Seas 6 to 8 feet

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

East swell around 4 feet shifting to the northeast 4 to 7 feet

after midnight. Isolated showers through the night.

.SATURDAY...Northeast winds 15 to 20 knots. Seas 8 to 10 feet with

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

swell 5 to 10 feet. Isolated showers.

.SUNDAY...East winds 15 to 20 knots. Seas 8 to 10 feet with

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

swell 6 to 10 feet. Isolated showers.

.MONDAY...Southeast winds 10 to 15 knots. Seas 8 to 10 feet with

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

swell 4 to 8 feet. Isolated showers.



$$



AMZ742-290230-

Coastal Waters of Northwestern Puerto Rico out 10 NM-

959 AM AST Thu Jan 28 2021



.REST OF TODAY...East winds 5 to 10 knots veering south in the

afternoon. Seas 3 to 5 feet with occasional seas up to 6 feet.

Dominant period 10 seconds.

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

occasional seas up to 5 feet. Dominant period 10 seconds.

.FRIDAY...East winds 10 to 15 knots backing northeast in the

afternoon. Seas 2 to 4 feet with occasional seas up to 5 feet.

Dominant period 11 seconds. Isolated showers through the day.

.FRIDAY NIGHT...Northeast winds 10 to 15 knots. Seas 3 to 5 feet

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

North swell around 4 feet after midnight. Isolated showers.

.SATURDAY...Northeast winds 15 to 20 knots. Seas 6 to 8 feet with

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

swell 5 to 10 feet. Scattered showers.

.SUNDAY...East winds 15 to 20 knots. Seas 6 to 8 feet with

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

swell 4 to 8 feet. Isolated showers.

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

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

swell 4 to 7 feet. Isolated showers.



$$



AMZ745-290230-

Coastal Waters of Southwestern Puerto Rico out 10 NM-

959 AM AST Thu Jan 28 2021



.REST OF TODAY...Southeast winds 5 to 10 knots. Seas 2 to 4 feet

with occasional seas up to 5 feet. Dominant period 10 seconds.

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

occasional seas up to 5 feet. Dominant period 10 seconds.

.FRIDAY...East winds 5 to 10 knots veering south in the afternoon.

Seas 1 to 3 feet. Dominant period 8 seconds. Isolated showers.

.FRIDAY NIGHT...Northeast winds 10 to 15 knots. Seas 1 to 3 feet.

Dominant period 11 seconds.

.SATURDAY...Northeast winds 15 to 20 knots. Seas 5 to 7 feet with

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

swell 4 to 9 feet. Scattered showers.

.SUNDAY...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. Scattered showers.

.MONDAY...Southeast 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 7 feet. Isolated showers.



$$

