Coastal Waters Forecast
Issued by NWS San Juan, PR

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FZCA52 TJSJ 210102
CWFSJU

Coastal Waters Forecast
National Weather Service San Juan PR
902 PM AST Fri Apr 20 2018

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.

AMZ700-211430-
902 PM AST Fri Apr 20 2018

.SYNOPSIS FOR PUERTO RICO AND THE U.S. VIRGIN ISLANDS WATERS...
A moderate to locally fresh wind flow will prevail across the
regional waters through early next week. A long period northeast
swell will continue to affect the local waters tonight. Seas will
gradually subside through the weekend.

$$

AMZ710-211430-
Atlantic Waters of Puerto Rico and USVI from 10 NM to 19.5N-
902 PM AST Fri Apr 20 2018

...SMALL CRAFT ADVISORY IN EFFECT THROUGH SATURDAY AFTERNOON...

.REST OF TONIGHT...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. Scattered showers through the night.
.SATURDAY...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 6 feet. Isolated showers.
.SATURDAY NIGHT...East winds 15 to 20 knots. Seas 4 to 6 feet with
occasional seas up to 8 feet. Dominant Period 11 seconds.
Northeast swell 4 to 5 feet. Isolated showers.
.SUNDAY...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.
.SUNDAY 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.
.MONDAY...East winds 15 to 20 knots. Seas 4 to 6 feet with
occasional seas up to 8 feet. Dominant Period 8 seconds. Scattered
showers.
.TUESDAY...East winds 10 to 15 knots. Seas 4 to 6 feet with
occasional seas up to 8 feet. Dominant Period 7 seconds. Scattered
showers.
.WEDNESDAY...East winds 10 to 15 knots. Seas 3 to 5 feet with
occasional seas up to 6 feet. Dominant Period 7 seconds. Isolated
showers.

$$

AMZ712-211430-
Coastal Waters of Northern Puerto Rico out 10 NM-
902 PM AST Fri Apr 20 2018

...Small Craft should exercise caution...

.REST OF TONIGHT...East winds 15 to 20 knots. Seas 3 to 5 feet
with occasional seas up to 6 feet. Dominant Period 11 seconds.
Northeast swell 4 to 5 feet. Isolated showers through the night.
.SATURDAY...East winds 15 to 20 knots. Seas 3 to 5 feet with
occasional seas up to 6 feet. Dominant Period 11 seconds.
Northeast swell around 4 feet. Scattered showers through the day.
.SATURDAY NIGHT...East winds 15 to 20 knots. Seas 3 to 5 feet with
occasional seas up to 6 feet. Dominant Period 11 seconds.
Northeast swell around 4 feet. Isolated showers.
.SUNDAY...East winds 15 to 20 knots. Seas 3 to 5 feet with
occasional seas up to 6 feet. Dominant Period 11 seconds.
Northeast swell around 4 feet. Isolated showers.
.SUNDAY NIGHT...East winds 15 to 20 knots. Seas 3 to 5 feet with
occasional seas up to 6 feet. Dominant Period 11 seconds.
Northeast swell around 4 feet. Isolated showers.
.MONDAY...East winds 10 to 15 knots. Seas 3 to 5 feet with
occasional seas up to 6 feet. Dominant Period 8 seconds. Isolated
showers.
.TUESDAY...East winds 10 to 15 knots. Seas 2 to 4 feet with
occasional seas up to 5 feet. Dominant Period 7 seconds. Isolated
showers.
.WEDNESDAY...East winds 10 to 15 knots. Seas 2 to 4 feet with
occasional seas up to 5 feet. Dominant Period 7 seconds. Isolated
showers.

$$

AMZ715-211430-
Coastal Waters of Northern USVI and Culebra out 10 NM-
902 PM AST Fri Apr 20 2018

...Small Craft should exercise caution...

.REST OF TONIGHT...East winds 15 to 20 knots. Seas 3 to 5 feet
with occasional seas up to 6 feet. Dominant Period 11 seconds.
Northeast swell around 4 feet. Scattered showers.
.SATURDAY...East winds 15 to 20 knots. Seas 3 to 5 feet with
occasional seas up to 6 feet. Dominant Period 11 seconds.
Northeast swell around 4 feet. Isolated showers.
.SATURDAY NIGHT...East winds 15 to 20 knots. Seas 3 to 5 feet with
occasional seas up to 6 feet. Dominant Period 11 seconds.
Northeast swell around 4 feet. Isolated showers.
.SUNDAY...East winds 10 to 15 knots. Seas 2 to 4 feet with
occasional seas up to 5 feet. Dominant Period 11 seconds.
Northeast swell around 4 feet. Isolated showers.
.SUNDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 4 feet with
occasional seas up to 5 feet. Dominant Period 11 seconds.
Scattered showers.
.MONDAY...East winds 10 to 15 knots. Seas 2 to 4 feet with
occasional seas up to 5 feet. Dominant Period 10 seconds.
Scattered showers.
.TUESDAY...East winds 10 to 15 knots. Seas 2 to 4 feet with
occasional seas up to 5 feet. Dominant Period 8 seconds. Scattered
showers.
.WEDNESDAY...East winds 10 to 15 knots. Seas 2 to 4 feet with
occasional seas up to 5 feet. Dominant Period 7 seconds. Scattered
showers.

$$

AMZ722-211430-
Anegada Passage Southward to 17N-
902 PM AST Fri Apr 20 2018

...Small Craft should exercise caution...

.REST OF TONIGHT...East winds 15 to 20 knots. Seas 4 to 6 feet
with occasional seas up to 8 feet. Dominant Period 13 seconds.
North swell 5 to 6 feet. Scattered showers.
.SATURDAY...East winds 15 to 20 knots. Seas 4 to 6 feet with
occasional seas up to 8 feet. Dominant Period 12 seconds. North
swell 5 to 6 feet. Isolated showers.
.SATURDAY NIGHT...East winds 15 to 20 knots. Seas 4 to 6 feet with
occasional seas up to 8 feet. Dominant Period 11 seconds.
Northeast swell 4 to 5 feet. Isolated showers.
.SUNDAY...East winds 10 to 15 knots. Seas 4 to 6 feet with
occasional seas up to 8 feet. Dominant Period 11 seconds.
Northeast swell 4 to 5 feet. Isolated showers.
.SUNDAY NIGHT...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. Scattered showers.
.MONDAY...East winds 10 to 15 knots. Seas 4 to 6 feet with
occasional seas up to 8 feet. Dominant Period 11 seconds.
Northeast swell around 4 feet. Scattered showers.
.TUESDAY...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. Scattered showers.
.WEDNESDAY...East winds 15 to 20 knots. Seas 3 to 5 feet with
occasional seas up to 6 feet. Dominant Period 8 seconds. Scattered
showers.

$$

AMZ725-211430-
Coastal Waters of Southern USVI Vieques and Eastern Puerto Rico out
10 NM-
902 PM AST Fri Apr 20 2018

...Small Craft should exercise caution...

.REST OF TONIGHT...East winds 15 to 20 knots. Seas 4 to 6 feet
with occasional seas up to 8 feet. Dominant Period 11 seconds.
East swell 4 to 5 feet. Scattered showers.
.SATURDAY...East winds 15 to 20 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.
.SATURDAY NIGHT...East winds 15 to 20 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.
.SUNDAY...East winds 10 to 15 knots. Seas 3 to 5 feet with
occasional seas up to 6 feet. Dominant Period 11 seconds. East
swell around 4 Feet. Isolated showers.
.SUNDAY NIGHT...East winds 10 to 15 knots. Seas 3 to 5 feet with
occasional seas up to 6 feet. Dominant Period 11 seconds. East
swell around 4 feet. Scattered showers.
.MONDAY...East winds 10 to 15 knots. Seas 3 to 5 feet with
occasional seas up to 6 feet. Dominant Period 11 seconds. East
swell around 4 feet. Scattered showers.
.TUESDAY...East winds 10 to 15 knots. Seas 2 to 4 feet with
occasional seas up to 5 feet. Dominant Period 10 seconds. East
swell around 4 feet. Numerous showers.
.WEDNESDAY...East winds 10 to 15 knots. Seas 3 to 5 feet with
occasional seas up to 6 feet. Dominant Period 10 seconds.
Northeast swell around 4 feet. Scattered showers.

$$

AMZ732-211430-
Caribbean Waters of Puerto Rico from 10 NM to 17N-
902 PM AST Fri Apr 20 2018

...Small Craft should exercise caution...

.REST OF TONIGHT...East 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 5 feet. Scattered showers.
.SATURDAY...East winds 15 to 20 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.
.SATURDAY NIGHT...East winds 15 to 20 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.
.SUNDAY...East winds 15 to 20 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.
.SUNDAY NIGHT...East winds 15 to 20 knots. Seas 4 to 6 feet with
occasional seas up to 8 feet. Dominant Period 11 seconds.
Northeast swell around 4 feet. Scattered showers.
.MONDAY...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. Scattered showers.
.TUESDAY...East 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. Numerous showers.
.WEDNESDAY...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. Scattered showers.

$$

AMZ735-211430-
Coastal Waters of Southern Puerto Rico out 10 NM-
902 PM AST Fri Apr 20 2018

...Small Craft should exercise caution...

.REST OF TONIGHT...East winds 15 to 20 knots. Seas 3 to 5 feet
with occasional seas up to 6 feet. Dominant Period 7 seconds.
Scattered showers through the night.
.SATURDAY...East winds 15 to 20 knots. Seas 3 to 5 feet with
occasional seas up to 6 feet. Dominant Period 7 seconds. Isolated
showers.
.SATURDAY NIGHT...East winds 15 to 20 knots. Seas 2 to 4 feet with
occasional seas up to 5 feet. Dominant Period 7 seconds. Isolated
showers through the night.
.SUNDAY...East winds 15 to 20 knots. Seas 2 to 4 feet with
occasional seas up to 5 feet. Dominant Period 7 seconds. Isolated
showers.
.SUNDAY NIGHT...East winds 15 to 20 knots. Seas 2 to 4 feet with
occasional seas up to 5 feet. Dominant Period 7 seconds. Isolated
showers.
.MONDAY...East winds 15 to 20 knots. Seas 1 to 3 feet. Dominant
Period 8 seconds. Isolated showers.
.TUESDAY...East winds 10 to 15 knots. Seas 1 to 3 feet. Dominant
Period 7 seconds. Scattered showers.
.WEDNESDAY...East winds 10 to 15 knots. Seas 2 to 4 feet with
occasional seas up to 5 feet. Dominant Period 10 seconds.
Scattered showers.

$$

AMZ741-211430-
Mona Passage Southward to 17N-
902 PM AST Fri Apr 20 2018

...Small Craft should exercise caution...

.REST OF TONIGHT...East winds 15 to 20 knots. Seas 4 to 6 feet
with occasional seas up to 8 feet. Dominant Period 11 seconds.
Northeast swell 4 to 5 feet. Isolated showers through the night.
.SATURDAY...East winds 15 to 20 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.
.SATURDAY NIGHT...East winds 15 to 20 knots. Seas 4 to 6 feet with
occasional seas up to 8 feet. Dominant Period 11 seconds.
Northeast swell 4 to 5 feet. Isolated showers through the night.
.SUNDAY...East winds 15 to 20 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.
.SUNDAY NIGHT...East winds 10 to 15 knots. Seas 4 to 6 feet with
occasional seas up to 8 feet. Dominant Period 11 seconds. East
swell around 4 feet after midnight. 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 around 4 feet. Isolated showers.
.TUESDAY...East winds 10 to 15 knots. Seas 3 to 5 feet with
occasional seas up to 6 feet. Dominant Period 7 seconds. Scattered
showers.
.WEDNESDAY...East winds 10 to 15 knots. Seas 3 to 5 feet with
occasional seas up to 6 feet. Dominant Period 7 seconds. Scattered
showers.

$$

AMZ742-211430-
Coastal Waters OF Northwestern Puerto Rico out 10 NM-
902 PM AST Fri Apr 20 2018

.REST OF TONIGHT...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. Isolated showers.
.SATURDAY...Northeast winds 10 to 15 knots. Seas 2 to 4 feet with
occasional seas up to 5 feet. Dominant Period 11 seconds. Isolated
thunderstorms in the afternoon.
.SATURDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 4 feet with
occasional seas up to 5 feet. Dominant Period 11 seconds.
Scattered showers.
.SUNDAY...East winds 15 to 20 knots. Seas 2 to 4 feet with
occasional seas up to 5 feet. Dominant Period 10 seconds.
.SUNDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 4 feet with
occasional seas up to 5 feet. Dominant Period 11 seconds. Isolated
showers.
.MONDAY...East winds 10 to 15 knots. Seas 2 to 4 feet with
occasional seas up to 5 feet. Dominant Period 8 seconds. Isolated
thunderstorms. Scattered showers.
.TUESDAY...East winds 5 to 10 knots. Seas 2 to 4 feet with
occasional seas up to 5 feet. Dominant Period 7 seconds. Isolated
thunderstorms, then isolated showers.
.WEDNESDAY...East winds 5 to 10 knots. Seas 1 to 3 feet. Dominant
Period 7 seconds. Isolated thunderstorms. Scattered showers.

$$

AMZ745-211430-
Coastal Waters OF Southwestern Puerto Rico out 10 NM-
902 PM AST Fri Apr 20 2018

.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.
.SATURDAY...East winds 15 to 20 knots. Seas 1 to 3 feet. Dominant
Period 7 seconds. Isolated showers through the day.
.SATURDAY NIGHT...East winds 10 to 15 knots. Seas 1 to 3 feet.
Dominant Period 7 seconds. Scattered showers.
.SUNDAY...East winds 5 to 10 knots. Seas 1 to 3 feet. Dominant
Period 7 seconds.
.SUNDAY NIGHT...Northeast winds 10 to 15 knots. Seas 1 to 3 feet.
Dominant Period 7 seconds. Isolated showers.
.MONDAY...East winds 5 to 10 knots. Seas 1 to 3 feet. Dominant
Period 8 seconds. Isolated showers.
.TUESDAY...East winds 5 to 10 knots. Seas 1 to 3 feet. Dominant
Period 7 seconds. Scattered showers.
.WEDNESDAY...East winds 5 to 10 knots. Seas 1 to 3 feet. Dominant
Period 7 seconds. Scattered showers.

$$


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