Coastal Waters Forecast
Issued by NWS San Juan, PR

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FZCA52 TJSJ 170826
CWFSJU

Coastal Waters Forecast
National Weather Service San Juan PR
426 AM AST Thu Aug 17 2017

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.

AMZ700-172115-
426 AM AST Thu Aug 17 2017

.SYNOPSIS FOR PUERTO RICO AND THE U.S. VIRGIN ISLANDS WATERS...
A surface high pressure across the central Atlantic will produce
moderate to locally fresh easterly winds through the rest of the
week. An active tropical wave will continue to move across the
region through late tonight, resulting in shower and thunderstorm
activity across the regional waters. An area of low pressure at the
surface is expected to move across the Caribbean Sea between late
Friday and Saturday.

$$

AMZ710-172115-
Atlantic Waters of Puerto Rico and USVI from 10 NM to 19.5N-
426 AM AST Thu Aug 17 2017

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

.TODAY...East winds 15 to 20 knots. Seas 6 to 8 feet with
occasional seas up to 10 feet. Dominant Period 8 seconds.
Northwest swell around 4 feet. Numerous showers and isolated
thunderstorms.
.TONIGHT...East winds 15 to 20 knots. Seas 5 to 7 feet with
occasional seas up to 9 feet. Dominant Period 8 seconds. Northwest
swell around 4 feet in the evening. Scattered showers and isolated
thunderstorms.
.FRIDAY...East winds 15 to 20 knots. Seas 5 to 7 feet with
occasional seas up to 9 feet. Dominant Period 8 seconds. Isolated
showers.
.FRIDAY NIGHT...East winds 15 to 20 knots. Seas 4 to 6 feet with
occasional seas up to 9 feet. Dominant Period 8 seconds. Northwest
swell around 4 feet after midnight. Isolated showers.
.SATURDAY...East winds 15 to 20 knots. Seas 6 to 8 feet with
occasional seas up to 10 feet. Dominant Period 8 seconds.
Northeast swell around 4 feet. Scattered showers. Isolated
thunderstorms.
.SUNDAY...East winds 15 to 20 knots. Seas 5 to 7 feet with
occasional seas up to 9 feet. Dominant Period 11 seconds.
Northeast swell 4 to 8 feet. Scattered showers and isolated
thunderstorms.
.MONDAY...East winds 10 to 15 knots. Seas 6 to 8 feet with
occasional seas up to 10 feet. Dominant Period 8 seconds. North
swell around 4 feet. Isolated thunderstorms. Scattered showers.

$$

AMZ712-172115-
Coastal Waters of Northern Puerto Rico out 10 NM-
426 AM AST Thu Aug 17 2017

...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING...

.TODAY...East winds 15 to 20 knots. Seas 5 to 7 feet with
occasional seas up to 9 feet. Dominant Period 8 seconds. Northeast
swell around 4 feet. Numerous showers and isolated thunderstorms.
.TONIGHT...East winds 15 to 20 knots. Seas 5 to 7 feet with
occasional seas up to 9 feet. Dominant Period 8 seconds. Northeast
swell around 4 feet in the evening. Isolated thunderstorms in the
evening. Scattered showers through the night.
.FRIDAY...East winds 15 to 20 knots. Seas 4 to 6 feet with
occasional seas up to 8 feet. Dominant Period 8 seconds. Isolated
showers.
.FRIDAY NIGHT...East winds 15 to 20 knots. Seas 4 to 6 feet with
occasional seas up to 8 feet. Dominant Period 8 seconds. Isolated
showers.
.SATURDAY...East winds 15 to 20 knots. Seas 5 to 7 feet with
occasional seas up to 9 feet. Dominant Period 7 seconds. Isolated
showers, then isolated thunderstorms.
.SUNDAY...East winds 10 to 15 knots. Seas 5 to 7 feet with
occasional seas up to 9 feet. Dominant Period 10 seconds.
Northeast swell around 4 feet. Scattered showers. Isolated
thunderstorms.
.MONDAY...East winds 10 to 15 knots. Seas 4 to 6 feet with
occasional seas up to 8 feet. Dominant Period 8 seconds. Isolated
showers.

$$

AMZ715-172115-
Coastal Waters of Northern USVI and Culebra out 10 NM-
426 AM AST Thu Aug 17 2017

...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS Evening...

.TODAY...East winds 15 to 20 knots. Seas 5 to 7 feet with
occasional seas up to 9 feet. Dominant Period 8 seconds. North
swell around 4 feet. Numerous showers and isolated thunderstorms.
.TONIGHT...East winds 15 to 20 knots. Seas 5 to 7 feet with
occasional seas up to 8 feet. Dominant Period 8 seconds. Isolated
thunderstorms in the evening. Scattered showers through the night.
.FRIDAY...East winds 15 to 20 knots. Seas 4 to 6 feet with
occasional seas up to 8 feet. Dominant Period 8 seconds. Isolated
showers.
.FRIDAY NIGHT...East winds 15 to 20 knots. Seas 5 to 7 feet with
occasional seas up to 9 feet. Dominant Period 8 seconds. Scattered
showers.
.SATURDAY...Northeast winds 15 to 20 knots. Seas 4 to 6 feet with
occasional seas up to 8 feet. Dominant Period 8 seconds. Scattered
showers. Isolated thunderstorms.
.SUNDAY...East winds 15 to 20 knots. Seas 4 to 6 feet with
occasional seas up to 8 feet. Dominant Period 10 seconds.
Northeast swell 4 to 5 feet. Scattered showers and isolated
thunderstorms.
.MONDAY...Northeast winds 10 to 15 knots. Seas 3 to 5 feet with
occasional seas up to 6 feet. Dominant Period 7 seconds. Isolated
thunderstorms. Scattered showers.

$$

AMZ722-172115-
Anegada Passage Southward to 17N-
426 AM AST Thu Aug 17 2017

...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS Evening...

.TODAY...East winds 15 to 20 knots. Seas 6 to 8 feet with
occasional seas up to 10 feet. Dominant Period 8 seconds.
Northeast swell around 4 feet. Isolated thunderstorms in the
morning. Numerous showers through the day.
.TONIGHT...East winds 15 to 20 knots. Seas 5 to 7 feet with
occasional seas up to 9 feet. Dominant Period 8 seconds. Scattered
showers.
.FRIDAY...East winds 15 to 20 knots. Seas 4 to 6 feet with
occasional seas up to 9 feet. Dominant Period 7 seconds. Isolated
showers.
.FRIDAY NIGHT...East winds 15 to 20 knots. Seas 5 to 7 feet with
occasional seas up to 9 feet. Dominant Period 7 seconds. North
swell around 4 feet after midnight. Scattered showers.
.SATURDAY...East winds 15 to 20 knots. Seas 5 to 7 feet with
occasional seas up to 9 feet. Dominant Period 8 seconds. Southeast
swell around 4 feet. Scattered showers and isolated thunderstorms.
.SUNDAY...East winds 10 to 15 knots. Seas 5 to 7 feet with
occasional seas up to 9 feet. Dominant Period 11 seconds.
Northeast swell 4 to 8 feet. Scattered showers and isolated
thunderstorms.
.MONDAY...East winds 10 to 15 knots. Seas 5 to 7 feet with
occasional seas up to 9 feet. Dominant Period 10 seconds. East
swell around 4 feet. Isolated thunderstorms. Scattered showers.

$$

AMZ725-172115-
Coastal Waters of Southern USVI Vieques and Eastern Puerto Rico out
10 NM-
426 AM AST Thu Aug 17 2017

...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS Evening...

.TODAY...East winds 15 to 20 knots. Seas 6 to 8 feet with
occasional seas up to 10 feet. Dominant Period 8 seconds.
Northeast swell around 4 feet. Numerous showers and isolated
thunderstorms.
.TONIGHT...East winds 15 to 20 knots. Seas 5 to 7 feet with
occasional seas up to 9 feet. Dominant Period 8 seconds. Isolated
thunderstorms in the evening. Scattered showers through the night.
.FRIDAY...East winds 15 to 20 knots. Seas 4 to 6 feet with
occasional seas up to 8 feet. Dominant Period 7 seconds. 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.
North swell around 4 feet after midnight. Scattered showers.
.SATURDAY...East winds 15 to 20 knots. Seas 4 to 6 feet with
occasional seas up to 8 feet. Dominant Period 8 seconds. Southeast
swell around 4 feet. Scattered showers and isolated thunderstorms.
.SUNDAY...East 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 6 feet. Scattered showers and isolated thunderstorms.
.MONDAY...Northeast winds 10 to 15 knots. Seas 4 to 6 feet with
occasional seas up to 8 feet. Dominant Period 8 seconds. Isolated
thunderstorms. Scattered showers.

$$

AMZ732-172115-
Caribbean Waters of Puerto Rico from 10 NM to 17N-
426 AM AST Thu Aug 17 2017

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 PM AST THIS Afternoon...

.TODAY...East winds 15 to 20 knots. Seas 5 to 7 feet with
occasional seas up to 9 feet. Dominant Period 7 seconds. North
swell around 4 feet. Numerous showers in the morning. Isolated
thunderstorms through the day.
.TONIGHT...East winds 15 to 20 knots. Seas 4 to 6 feet with
occasional seas up to 8 feet. Dominant Period 7 seconds. Isolated
thunderstorms in the evening, then isolated showers after
midnight.
.FRIDAY...East winds 15 to 20 knots. Seas 4 to 6 feet with
occasional seas up to 8 feet. Dominant Period 7 seconds. 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.
North swell around 4 feet after midnight. Scattered showers.
.SATURDAY...East 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. Scattered showers and isolated thunderstorms.
.SUNDAY...East 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 6 feet. Scattered showers and isolated thunderstorms.
.MONDAY...East winds 10 to 15 knots. Seas 4 to 6 feet with
occasional seas up to 8 feet. Dominant Period 8 seconds. Isolated
thunderstorms. Scattered showers.

$$

AMZ735-172115-
Coastal Waters of Southern Puerto Rico out 10 NM-
426 AM AST Thu Aug 17 2017

...Small Craft should exercise caution...

.TODAY...East winds 15 to 20 knots. Seas 4 to 6 feet with
occasional seas up to 8 feet. Dominant Period 7 seconds. Isolated
thunderstorms in the morning. Numerous showers through the day.
.TONIGHT...East winds 15 to 20 knots. Seas 4 to 6 feet with
occasional seas up to 8 feet. Dominant Period 7 seconds. Isolated
showers.
.FRIDAY...East winds 15 to 20 knots. Seas 4 to 6 feet with
occasional seas up to 8 feet. Dominant Period 7 seconds. Isolated
showers.
.FRIDAY NIGHT...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.
.SATURDAY...East winds 15 to 20 knots. Seas 4 to 6 feet with
occasional seas up to 8 feet. Dominant Period 7 seconds. Isolated
thunderstorms. Scattered showers.
.SUNDAY...East winds 10 to 15 knots. Seas 2 to 4 feet with
occasional seas up to 5 feet. Dominant Period 11 seconds. Isolated
showers, then isolated thunderstorms.
.MONDAY...Northeast winds 10 to 15 knots. Seas 2 to 4 feet with
occasional seas up to 5 feet. Dominant Period 8 seconds. Isolated
showers.

$$

AMZ741-172115-
Mona Passage Southward to 17N-
426 AM AST Thu Aug 17 2017

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 PM AST THIS Afternoon...

.TODAY...East winds 15 to 20 knots. Seas 5 to 7 feet with
occasional seas up to 9 feet. Dominant Period 7 seconds. Numerous
showers and isolated thunderstorms.
.TONIGHT...East winds 15 to 20 knots. Seas 4 to 6 feet with
occasional seas up to 8 feet. Dominant Period 8 seconds. Scattered
showers and isolated thunderstorms.
.FRIDAY...East winds 15 to 20 knots. Seas 4 to 6 feet with
occasional seas up to 8 feet. Dominant Period 7 seconds. 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.
Isolated showers.
.SATURDAY...East winds 15 to 20 knots. Seas 5 to 7 feet with
occasional seas up to 9 feet. Dominant Period 8 seconds. East
swell around 4 feet. Isolated thunderstorms. Scattered 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 thunderstorms. Scattered
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.

$$

AMZ742-172115-
Coastal Waters OF Northwestern Puerto Rico out 10 NM-
426 AM AST Thu Aug 17 2017

...Small Craft should exercise caution...

.TODAY...East winds 10 to 15 knots. Seas 4 to 6 feet with
occasional seas up to 8 feet. Dominant Period 8 seconds. Numerous
showers and isolated thunderstorms.
.TONIGHT...East winds 10 to 15 knots. Seas 4 to 6 feet with
occasional seas up to 8 feet. Dominant Period 7 seconds. Numerous
showers and isolated thunderstorms.
.FRIDAY...Northeast winds 15 to 20 knots. Seas 4 to 6 feet with
occasional seas up to 8 feet. Dominant Period 7 seconds.
.FRIDAY NIGHT...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.
.SATURDAY...East winds 15 to 20 knots. Seas 3 to 5 feet with
occasional seas up to 6 feet. Dominant Period 7 seconds. Isolated
thunderstorms, then isolated showers.
.SUNDAY...East winds 10 to 15 knots. Seas 2 to 4 feet with
occasional seas up to 5 feet. Dominant Period 10 seconds.
Northeast swell around 4 feet. Isolated thunderstorms. Scattered
showers.
.MONDAY...East winds 5 to 10 knots. Seas 3 to 5 feet with
occasional seas up to 6 feet. Dominant Period 8 seconds. Isolated
thunderstorms. Scattered showers.

$$

AMZ745-172115-
Coastal Waters OF Southwestern Puerto Rico out 10 NM-
426 AM AST Thu Aug 17 2017

...Small Craft should exercise caution...

.TODAY...East winds 15 to 20 knots. Seas 3 to 5 feet with
occasional seas up to 6 feet. Dominant Period 8 seconds. Scattered
showers and isolated thunderstorms.
.TONIGHT...East winds 10 to 15 knots. Seas 2 to 4 feet with
occasional seas up to 5 feet. Dominant Period 7 seconds. Isolated
thunderstorms.
.FRIDAY...East winds 10 to 15 knots. Seas 2 to 4 feet with
occasional seas up to 5 feet. Dominant Period 7 seconds. Scattered
showers through the day. Isolated thunderstorms in the afternoon.
.FRIDAY NIGHT...Northeast winds 15 to 20 knots. Seas 2 to 4 feet
with occasional seas up to 5 feet. Dominant Period 7 seconds.
Scattered showers.
.SATURDAY...Northeast winds 15 to 20 knots. Seas 2 to 4 feet with
occasional seas up to 5 feet. Dominant Period 8 seconds. Isolated
thunderstorms. Scattered showers.
.SUNDAY...East winds 5 to 10 knots. Seas 1 to 3 feet. Dominant
Period 7 seconds. Isolated thunderstorms, then isolated showers.
.MONDAY...Northeast winds 5 to 10 knots. Seas 1 to 3 feet.
Dominant Period 7 seconds. Isolated thunderstorms. Scattered
showers.

$$



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