

341 

FZCA52 TJSJ 220136

CWFSJU



Coastal Waters Forecast

National Weather Service San Juan PR

936 PM AST Thu Jan 21 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.



AMZ700-221415-

936 PM AST Thu Jan 21 2021



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

Light to moderate winds are expected across the local waters during 

the next few days. Fairly tranquil marine conditions will prevail 

across most of the local waters through the end of the week. A small 

northerly swell will invade the Atlantic waters by late Friday into 

early Saturday, creating choppy seas.



$$



AMZ710-221415-

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

936 PM AST Thu Jan 21 2021



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

occasional seas up to 6 feet. Dominant period 8 seconds. Isolated

showers.

.FRIDAY...East 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 in the afternoon. Isolated showers.

.FRIDAY NIGHT...East 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.

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

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

swell 4 to 5 Feet. Isolated showers.

.SATURDAY NIGHT...Northeast winds 5 to 10 knots. Seas 3 to 5 feet

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

Isolated showers.

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

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

showers.

.MONDAY...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 7 feet. Isolated showers.

.TUESDAY...Northeast winds 10 to 15 knots. Seas 5 to 7 feet with

occasional seas up to 9 feet. Dominant period 11 seconds. North

swell 4 to 7 feet. Isolated showers.



$$



AMZ712-221415-

Coastal Waters of Northern Puerto Rico out 10 NM-

936 PM AST Thu Jan 21 2021



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

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

showers.

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

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

swell around 4 feet in the afternoon. Isolated showers.

.FRIDAY NIGHT...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.

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

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

swell 4 to 5 Feet. Isolated showers.

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

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

showers.

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

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

showers.

.MONDAY...East winds 10 to 15 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.

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

occasional seas up to 9 feet. Dominant period 11 seconds. North

swell 4 to 6 feet. Isolated showers.



$$



AMZ715-221415-

Coastal Waters of Northern USVI and Culebra out 10 NM-

936 PM AST Thu Jan 21 2021



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

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

Scattered showers.

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

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

showers.

.FRIDAY NIGHT...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 after midnight. Isolated showers.

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

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

swell around 4 feet. Isolated showers.

.SATURDAY NIGHT...Northeast winds 5 to 10 knots. Seas 3 to 5 feet

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

Isolated showers.

.SUNDAY...Northeast winds 10 to 15 knots. Seas 2 to 4 feet with

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

showers.

.MONDAY...Northeast winds 10 to 15 knots. Seas 2 to 4 feet with

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

swell around 4 feet. Isolated showers.

.TUESDAY...Northeast 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.



$$



AMZ722-221415-

Anegada Passage Southward to 17N-

936 PM AST Thu Jan 21 2021



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

occasional seas up to 6 feet. Dominant period 9 seconds. Isolated

showers.

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

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

showers.

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

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

swell around 4 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.

.SATURDAY NIGHT...Northeast winds 5 to 10 knots. Seas 3 to 5 feet

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

Isolated showers.

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

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

swell around 4 feet. Isolated showers.

.MONDAY...Northeast winds 10 to 15 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.

.TUESDAY...Northeast 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.



$$



AMZ725-221415-

Coastal Waters of Southern USVI Vieques and Eastern Puerto Rico out

10 NM-

936 PM AST Thu Jan 21 2021



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

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

Scattered showers.

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

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

showers.

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

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

swell around 4 feet. Isolated showers.

.SATURDAY NIGHT...Northeast winds 5 to 10 knots. Seas 2 to 4 feet

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

Isolated showers.

.SUNDAY...Northeast winds 10 to 15 knots. Seas 2 to 4 feet with

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

showers.

.MONDAY...Northeast winds 10 to 15 knots. Seas 2 to 4 feet with

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

showers.

.TUESDAY...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. Isolated showers.



$$



AMZ732-221415-

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

936 PM AST Thu Jan 21 2021



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

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

Isolated showers.

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

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

showers.

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

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

showers.

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

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

showers.

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

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

showers.

.SUNDAY...Northeast winds 10 to 15 knots. Seas 2 to 4 feet with

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

showers.

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

occasional seas up to 6 feet. Dominant period 8 seconds. Isolated

showers.

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

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

Northeast swell around 4 feet. Isolated showers.



$$



AMZ735-221415-

Coastal Waters of Southern Puerto Rico out 10 NM-

936 PM AST Thu Jan 21 2021



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

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

Isolated showers through the night.

.FRIDAY...East winds 10 to 15 knots. Seas 1 to 3 feet. Dominant

period 8 seconds. Isolated showers.

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

Dominant period 8 seconds. Isolated showers.

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

period 10 seconds. Isolated showers.

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

Dominant period 10 seconds. Isolated showers.

.SUNDAY...Northeast winds 5 to 10 knots. Seas 1 to 3 feet.

Dominant period 8 seconds. Isolated showers.

.MONDAY...Northeast winds 10 to 15 knots. Seas 1 to 3 feet.

Dominant period 7 seconds. Isolated showers.

.TUESDAY...Northeast winds 10 to 15 knots. Seas 2 to 4 feet with

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

showers.



$$



AMZ741-221415-

Mona Passage Southward to 17N-

936 PM AST Thu Jan 21 2021



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

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

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

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

swell around 4 feet. Isolated showers.

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

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

swell around 4 feet. Isolated showers.

.SATURDAY NIGHT...Northeast winds 5 to 10 knots. Seas 3 to 5 feet

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

Isolated showers.

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

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

showers.

.MONDAY...East winds 10 to 15 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.

.TUESDAY...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.



$$



AMZ742-221415-

Coastal Waters of Northwestern Puerto Rico out 10 NM-

936 PM AST Thu Jan 21 2021



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

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

Isolated showers through the night.

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

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

showers.

.FRIDAY NIGHT...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 after midnight. Isolated showers.

.SATURDAY...East winds 5 to 10 knots backing north in the

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

Dominant period 10 seconds. North swell around 4 feet. Isolated

showers.

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

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

showers.

.SUNDAY...Northeast winds 10 to 15 knots. Seas 2 to 4 feet with

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

showers.

.MONDAY...Northeast winds 10 to 15 knots. Seas 2 to 4 feet with

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

swell around 4 feet. Isolated showers.

.TUESDAY...Northeast winds 10 to 15 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.



$$



AMZ745-221415-

Coastal Waters of Southwestern Puerto Rico out 10 NM-

936 PM AST Thu Jan 21 2021



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

Dominant period 8 seconds. Scattered showers.

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

period 7 seconds.

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

Dominant period 11 seconds. Isolated showers.

.SATURDAY...East 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. North swell around 4 feet. Isolated

showers.

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

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

showers.

.SUNDAY...Northeast winds 5 to 10 knots. Seas 1 to 3 feet.

Dominant period 10 seconds. Isolated showers.

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

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

showers.

.TUESDAY...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.



$$

