

208 

FZCA52 TJSJ 301920

CWFSJU



Coastal Waters Forecast

National Weather Service San Juan PR

320 PM AST Wed Dec 30 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.



AMZ700-310800-

320 PM AST Wed Dec 30 2020



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

Hazardous marine conditions caused by fresh to strong winds are 

spreading across the local waters from the Atlantic. This worsening 

of conditions will continue tonight into tomorrow, and hazardous 

conditions are expected for the rest of the week into the weekend. 

Isolated to scattered showers can be expected across the local waters

for the next couple days.



$$



AMZ710-310800-

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

320 PM AST Wed Dec 30 2020



...SMALL CRAFT ADVISORY IN EFFECT THROUGH SUNDAY MORNING...



.TONIGHT...Northeast winds 20 to 25 knots. Seas 10 to 12 feet with

occasional seas up to 14 feet. Dominant period 8 seconds. North

swell 4 to 5 feet. Scattered showers.

.THURSDAY...Northeast winds 20 to 25 knots. Seas 10 to 12 feet

with occasional seas up to 14 feet. Dominant period 8 seconds.

North swell 5 to 6 feet. Scattered showers.

.THURSDAY NIGHT...East winds 20 to 25 knots. Seas 10 to 12 feet

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

North swell 5 to 6 feet. Scattered showers.

.FRIDAY...East winds 20 to 25 knots. Seas 10 to 12 feet with

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

Northeast swell 6 to 11 feet. Scattered showers.

.FRIDAY NIGHT...East winds 20 to 25 knots. Seas 10 to 12 feet with

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

Northeast swell around 5 feet. Isolated showers.

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

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

Northeast swell 4 to 5 feet. Isolated showers.

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

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

Northeast swell 4 to 7 feet. Isolated showers.

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

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

showers.



$$



AMZ712-310800-

Coastal Waters of Northern Puerto Rico out 10 NM-

320 PM AST Wed Dec 30 2020



...SMALL CRAFT ADVISORY IN EFFECT THROUGH SUNDAY MORNING...



.TONIGHT...Northeast winds 20 to 25 knots. Seas 8 to 10 feet with

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

Northeast swell 4 to 5 feet. Numerous showers.

.THURSDAY...East winds 20 to 25 knots. Seas 10 to 12 feet with

occasional seas up to 14 feet. Dominant period 8 seconds.

Northeast swell 4 to 5 feet. Numerous showers.

.THURSDAY NIGHT...East winds 20 to 25 knots. Seas 10 to 12 feet

with occasional seas up to 14 feet. Dominant period 9 seconds.

North swell around 5 feet. Numerous showers.

.FRIDAY...East winds 20 to 25 knots. Seas 10 to 12 feet with

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

Northeast swell 4 to 5 feet. Scattered showers.

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

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

Northeast swell 4 to 5 feet. Isolated showers.

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

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

Northeast swell 4 to 5 feet. Isolated showers.

.SUNDAY...East winds 10 to 15 knots. Seas 6 to 8 feet with

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

Northeast swell 4 to 7 feet. Isolated showers.

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

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

Scattered showers.



$$



AMZ715-310800-

Coastal Waters of Northern USVI and Culebra out 10 NM-

320 PM AST Wed Dec 30 2020



...SMALL CRAFT ADVISORY IN EFFECT THROUGH SUNDAY MORNING...



.TONIGHT...Northeast winds 20 to 25 knots. Seas 8 to 10 feet with

occasional seas up to 13 feet. Dominant period 7 seconds. North

swell 4 to 5 feet. Scattered showers.

.THURSDAY...Northeast winds 20 to 25 knots. Seas 8 to 10 feet with

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

swell 4 to 5 feet. Scattered showers.

.THURSDAY NIGHT...East winds 20 to 25 knots. Seas 10 to 12 feet

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

North swell 4 to 5 feet. Scattered showers.

.FRIDAY...Northeast winds 20 to 25 knots. Seas 8 to 10 feet with

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

swell 4 to 5 feet. Scattered showers.

.FRIDAY NIGHT...Northeast winds 20 to 25 knots. Seas 8 to 10 feet

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

North swell 4 to 5 feet. Isolated showers.

.SATURDAY...East winds 15 to 20 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.

.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 10 to 15 knots. Seas 4 to 6 feet with

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

showers.



$$



AMZ722-310800-

Anegada Passage Southward to 17N-

320 PM AST Wed Dec 30 2020



...SMALL CRAFT ADVISORY IN EFFECT THROUGH SUNDAY MORNING...



.TONIGHT...Northeast winds 20 to 25 knots. Seas 8 to 10 feet with

occasional seas up to 13 feet. Dominant period 7 seconds.

Northeast swell 4 to 5 feet. Scattered showers.

.THURSDAY...East winds 20 to 25 knots. Seas 10 to 12 feet with

occasional seas up to 14 feet. Dominant period 7 seconds. North

swell 4 to 6 feet. Scattered showers.

.THURSDAY NIGHT...East winds 20 to 25 knots. Seas 10 to 12 feet

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

Northeast swell 6 to 11 feet. Isolated showers through the night.

.FRIDAY...Northeast winds 20 to 25 knots. Seas 10 to 12 feet with

occasional seas up to 14 feet. Dominant period 11 seconds.

Northeast swell 5 to 10 feet. Scattered showers.

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

with occasional seas up to 14 feet. Dominant period 11 seconds.

Northeast swell 5 to 10 feet. Isolated showers.

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

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

Northeast swell 4 to 9 feet. Isolated showers.

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

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

Northeast swell 4 to 9 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.



$$



AMZ725-310800-

Coastal Waters of Southern USVI Vieques and Eastern Puerto Rico out

10 NM-

320 PM AST Wed Dec 30 2020



...SMALL CRAFT ADVISORY IN EFFECT THROUGH SUNDAY MORNING...



.TONIGHT...Northeast winds 20 to 25 knots. Seas 8 to 10 feet with

occasional seas up to 11 feet. Dominant period 7 seconds.

Northeast swell 4 to 5 feet. Scattered showers.

.THURSDAY...Northeast winds 20 to 25 knots. Seas 8 to 10 feet with

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

swell 4 to 5 feet. Scattered showers.

.THURSDAY NIGHT...Northeast winds 20 to 25 knots. Seas 8 to 10

feet with occasional seas up to 13 feet. Dominant period 8

seconds. North swell 4 to 5 feet. Scattered showers.

.FRIDAY...Northeast winds 20 to 25 knots. Seas 8 to 10 feet with

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

Northeast swell 4 to 5 feet. Scattered showers.

.FRIDAY NIGHT...Northeast winds 20 to 25 knots. Seas 8 to 10 feet

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

Northeast swell 4 to 5 feet. Isolated showers.

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

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

Northeast swell around 4 feet. Isolated showers.

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

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

swell 4 to 5 feet. Isolated showers.

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

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

showers.



$$



AMZ732-310800-

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

320 PM AST Wed Dec 30 2020



...SMALL CRAFT ADVISORY IN EFFECT THROUGH SUNDAY MORNING...



.TONIGHT...Northeast winds 20 to 25 knots. Seas 8 to 10 feet with

occasional seas up to 11 feet. Dominant period 7 seconds.

Northeast swell 4 to 5 feet. Scattered showers.

.THURSDAY...East winds 20 to 25 knots. Seas 10 to 12 feet with

occasional seas up to 14 feet. Dominant period 8 seconds. North

swell 4 to 5 feet. Scattered showers.

.THURSDAY NIGHT...East winds 20 to 25 knots. Seas 10 to 12 feet

with occasional seas up to 14 feet. Dominant period 8 seconds.

North swell 4 to 5 feet. Scattered showers.

.FRIDAY...Northeast winds 20 to 25 knots. Seas 10 to 12 feet with

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

swell 4 to 5 feet. Isolated showers.

.FRIDAY NIGHT...Northeast winds 20 to 25 knots. Seas 8 to 10 feet

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

North swell 4 to 5 feet. Isolated showers.

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

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

Northeast swell 4 to 5 feet. Isolated showers.

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

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

Northeast swell 4 to 8 feet. Isolated showers.

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

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

showers.



$$



AMZ735-310800-

Coastal Waters of Southern Puerto Rico out 10 NM-

320 PM AST Wed Dec 30 2020



...SMALL CRAFT SHOULD EXERCISE CAUTION...

...SMALL CRAFT ADVISORY IN EFFECT FROM 6 PM AST THIS EVENING

THROUGH SUNDAY MORNING...



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

occasional seas up to 8 feet. Dominant period 7 seconds. Isolated

showers through the night.

.THURSDAY...Northeast winds 20 to 25 knots. Seas 6 to 8 feet with

occasional seas up to 10 feet. Dominant period 7 seconds. North

swell around 4 feet in the afternoon. Scattered showers.

.THURSDAY NIGHT...Northeast winds 20 to 25 knots. Seas 6 to 8 feet

with occasional seas up to 10 feet. Dominant period 7 seconds.

Northeast swell around 4 feet. Isolated showers.

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

occasional seas up to 10 feet. Dominant period 7 seconds. East

swell around 4 feet. Isolated showers.

.FRIDAY NIGHT...Northeast winds 15 to 20 knots. Seas 5 to 7 feet

with occasional seas up to 9 feet. Dominant period 7 seconds.

Southeast swell around 4 feet. Isolated showers.

.SATURDAY...Northeast winds 15 to 20 knots. Seas 4 to 7 feet with 

occasional seas up to 8 feet. Dominant period 7 seconds. Isolated 

showers.

.SUNDAY...Northeast winds 10 to 15 knots. Seas 4 to 7 feet with 

occasional seas up to 8 feet. Dominant period 7 seconds. Isolated 

showers.

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

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

showers.



$$



AMZ741-310800-

Mona Passage Southward to 17N-

320 PM AST Wed Dec 30 2020



...SMALL CRAFT ADVISORY IN EFFECT THROUGH SUNDAY MORNING...



.TONIGHT...Northeast winds 20 to 25 knots. Seas 8 to 10 feet with

occasional seas up to 13 feet. Dominant period 7 seconds. East

swell 4 to 5 feet. Scattered showers through the night.

.THURSDAY...Northeast winds 20 to 25 knots. Seas 8 to 10 feet with

occasional seas up to 13 feet. Dominant period 7 seconds.

Northeast swell 4 to 5 feet. Isolated showers.

.THURSDAY NIGHT...East winds 20 to 25 knots. Seas 8 to 10 feet

with occasional seas up to 13 feet. Dominant period 7 seconds.

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

.FRIDAY...East winds 20 to 25 knots. Seas 8 to 10 feet with

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

Northeast swell 4 to 5 feet. Isolated showers.

.FRIDAY NIGHT...East winds 20 to 25 knots. Seas 8 to 10 feet with

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

Northeast swell 4 to 5 feet. Isolated showers.

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

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

Northeast swell 4 to 5 feet. Isolated showers.

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

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

Northeast swell 4 to 5 feet. Isolated showers.

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

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

swell 4 to 5 feet. Isolated showers.



$$



AMZ742-310800-

Coastal Waters of Northwestern Puerto Rico out 10 NM-

320 PM AST Wed Dec 30 2020



...SMALL CRAFT ADVISORY IN EFFECT THROUGH SUNDAY MORNING...



.TONIGHT...Northeast winds 20 to 25 knots. Seas 8 to 10 feet with

occasional seas up to 11 feet. Dominant period 7 seconds. North

swell 4 to 5 feet. Scattered showers.

.THURSDAY...Northeast winds 20 to 25 knots. Seas 8 to 10 feet with

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

swell 4 to 5 feet. Scattered showers.

.THURSDAY NIGHT...Northeast winds 20 to 25 knots. Seas 8 to 10

feet with occasional seas up to 13 feet. Dominant period 8

seconds. Northeast swell 4 to 5 feet. Isolated showers through the

night.

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

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

Northeast swell 4 to 5 feet.

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

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

Northeast swell 4 to 5 feet. Isolated showers.

.SATURDAY...East winds 15 to 20 knots. Seas 4 to 7 feet with 

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

swell around 4 feet. Isolated showers.

.SUNDAY...East winds 10 to 15 knots. Seas 3 to 7 feet with 

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

swell 4 to 5 feet. Isolated showers.

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

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

Northeast swell 4 to 5 feet. Isolated showers.



$$



AMZ745-310800-

Coastal Waters of Southwestern Puerto Rico out 10 NM-

320 PM AST Wed Dec 30 2020



...SMALL CRAFT SHOULD EXERCISE CAUTION...



.TONIGHT...Northeast winds 15 to 20 knots. Seas 3 to 5 feet with

occasional seas up to 6 feet. Dominant period 7 seconds. Isolated

showers through the night.

.THURSDAY...Northeast winds 15 to 20 knots. Seas 3 to 5 feet with

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

showers.

.THURSDAY NIGHT...East winds 15 to 20 knots. Seas 3 to 5 feet with

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

showers through the night.

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

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

.FRIDAY NIGHT...Northeast winds 15 to 20 knots. Seas 3 to 5 feet

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

Isolated showers.

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

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

showers.

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

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

showers.

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

Dominant period 10 seconds. Isolated showers.



$$

