Coastal Waters Forecast
Issued by NWS San Juan, PR

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FZCA52 TJSJ 182057
CWFSJU

Coastal Waters Forecast
National Weather Service San Juan PR
457 PM AST Wed Oct 18 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.

AMZ700-190915-
457 PM AST Wed Oct 18 2017

.SYNOPSIS FOR PUERTO RICO AND THE U.S. VIRGIN ISLANDS WATERS...
Shower and thunderstorm activity will decrease tonight as an upper
level ridge builds across the region. An increase in winds will
produce choppy and dangerous seas across the local waters through at
least the weekend, particularly over the offshore Caribbean waters
and Mona Passage. Marine conditions will improve gradually by early
next week.

$$

AMZ710-190915-
Atlantic Waters of Puerto Rico and USVI from 10 NM to 19.5N-
457 PM AST Wed Oct 18 2017

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

.TONIGHT...East winds 15 to 20 knots. Seas 5 to 7 feet with
occasional seas up to 9 feet. Dominant Period 10 seconds.
Northeast swell 4 to 6 feet. Isolated showers.
.THURSDAY...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 5 feet. Isolated showers in the morning.
.THURSDAY NIGHT...East winds 15 to 20 knots. Seas 5 to 7 feet with
occasional seas up to 9 feet. Dominant Period 10 seconds. North
swell 4 to 5 feet. Isolated thunderstorms.
.FRIDAY...East winds 15 to 20 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 through the day.
.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 through the night.
.SATURDAY...East winds 10 to 15 knots. Seas 3 to 5 feet with
occasional seas up to 6 feet. Dominant Period 8 seconds. Isolated
showers.
.SUNDAY...East winds 15 to 20 knots. Seas 4 to 6 feet with
occasional seas up to 8 feet. Dominant Period 8 seconds. Isolated
showers.
.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.

$$

AMZ712-190915-
Coastal Waters of Northern Puerto Rico out 10 NM-
457 PM AST Wed Oct 18 2017

.TONIGHT...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 in the evening. Scattered showers in
the evening, then isolated thunderstorms after midnight.
.THURSDAY...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 in the afternoon. Isolated showers
in the morning.
.THURSDAY NIGHT...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 in the evening. Isolated
thunderstorms.
.FRIDAY...East winds 10 to 15 knots. Seas 3 to 5 feet with
occasional seas up to 6 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 through the night.
.SATURDAY...East winds 10 to 15 knots. Seas 2 to 4 feet with
occasional seas up to 5 feet. Dominant Period 8 seconds. Isolated
showers.
.SUNDAY...East winds 10 to 15 knots. Seas 3 to 5 feet with
occasional seas up to 6 feet. Dominant Period 8 seconds. Isolated
thunderstorms, then isolated showers.
.MONDAY...East winds 10 to 15 knots. Seas 2 to 4 feet with
occasional seas up to 5 feet. Dominant Period 7 seconds. Isolated
showers.

$$

AMZ715-190915-
Coastal Waters of Northern USVI and Culebra out 10 NM-
457 PM AST Wed Oct 18 2017

...Small Craft should exercise caution...

.TONIGHT...East winds 15 to 20 knots. Seas 3 to 5 feet with
occasional seas up to 6 feet. Dominant Period 10 seconds.
Northeast swell around 4 feet in the evening. Isolated showers.
.THURSDAY...East winds 15 to 20 knots. Seas 3 to 5 feet with
occasional seas up to 6 feet. Dominant Period 10 seconds.
Northeast swell around 4 feet. Isolated showers in the morning,
then isolated thunderstorms in the afternoon.
.THURSDAY NIGHT...East winds 15 to 20 knots. Seas 3 to 5 feet with
occasional seas up to 6 feet. Dominant Period 10 seconds. North
swell around 4 feet. Isolated thunderstorms.
.FRIDAY...East winds 15 to 20 knots. Seas 3 to 5 feet with
occasional seas up to 6 feet. Dominant Period 10 seconds. North
swell around 4 Feet. 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 through the night.
.SATURDAY...East winds 10 to 15 knots. Seas 2 to 4 feet with
occasional seas up to 5 feet. Dominant Period 8 seconds. Isolated
showers.
.SUNDAY...East winds 15 to 20 knots. Seas 3 to 5 feet with
occasional seas up to 6 feet. Dominant Period 7 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
showers.

$$

AMZ722-190915-
Anegada Passage Southward to 17N-
457 PM AST Wed Oct 18 2017

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

.TONIGHT...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 7 feet. Isolated showers.
.THURSDAY...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 7 feet. Isolated showers in the morning, then
isolated thunderstorms in the afternoon.
.THURSDAY NIGHT...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 7 feet. Isolated thunderstorms.
.FRIDAY...East winds 15 to 20 knots. Seas 5 to 7 feet with
occasional seas up to 9 feet. Dominant Period 11 seconds. North
swell 4 to 6 feet shifting to the east 4 to 5 feet in the
afternoon. Isolated showers through the day.
.FRIDAY NIGHT...East winds 15 to 20 knots. Seas 4 to 6 feet with
occasional seas up to 8 feet. Dominant Period 10 seconds. East
swell 4 to 5 feet shifting to the north after midnight.
.SATURDAY...East winds 15 to 20 knots. Seas 4 to 6 feet with
occasional seas up to 8 feet. Dominant Period 10 seconds.
.SUNDAY...East winds 15 to 20 knots. Seas 4 to 6 feet with
occasional seas up to 8 feet. Dominant Period 8 seconds. Isolated
showers.
.MONDAY...East winds 15 to 20 knots. Seas 3 to 5 feet with
occasional seas up to 6 feet. Dominant Period 8 seconds. Isolated
showers.

$$

AMZ725-190915-
Coastal Waters of Southern USVI Vieques and Eastern Puerto Rico out
10 NM-
457 PM AST Wed Oct 18 2017

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

.TONIGHT...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 5 feet. Isolated thunderstorms.
.THURSDAY...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 6 feet. Isolated showers in the morning, then
isolated thunderstorms in the afternoon.
.THURSDAY NIGHT...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 5 feet. Isolated thunderstorms.
.FRIDAY...East winds 15 to 20 knots. Seas 4 to 6 feet with
occasional seas up to 8 feet. Dominant Period 10 seconds. North
swell 4 to 5 feet shifting to the southeast in the afternoon.
Isolated showers.
.FRIDAY NIGHT...East winds 10 to 15 knots. Seas 3 to 5 feet with
occasional seas up to 6 feet. Dominant Period 8 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 10 seconds. Isolated
showers.
.SUNDAY...East winds 15 to 20 knots. Seas 4 to 6 feet with
occasional seas up to 8 feet. Dominant Period 7 seconds. 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.

$$

AMZ732-190915-
Caribbean Waters of Puerto Rico from 10 NM to 17N-
457 PM AST Wed Oct 18 2017

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

.TONIGHT...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. Scattered showers and isolated thunderstorms.
.THURSDAY...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 in the morning, then isolated
thunderstorms in the afternoon.
.THURSDAY NIGHT...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 8 feet. Isolated thunderstorms.
.FRIDAY...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 8 feet. Isolated showers.
.FRIDAY NIGHT...East winds 15 to 20 knots. Seas 5 to 7 feet with
occasional seas up to 9 feet. Dominant Period 10 seconds. North
swell 4 to 5 feet.
.SATURDAY...East winds 15 to 20 knots. Seas 5 to 7 feet with
occasional seas up to 9 feet. Dominant Period 10 seconds. North
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 8 seconds. North
swell around 4 feet. Isolated showers.
.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.

$$

AMZ735-190915-
Coastal Waters of Southern Puerto Rico out 10 NM-
457 PM AST Wed Oct 18 2017

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

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

$$

AMZ741-190915-
Mona Passage Southward to 17N-
457 PM AST Wed Oct 18 2017

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

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

$$

AMZ742-190915-
Coastal Waters OF Northwestern Puerto Rico out 10 NM-
457 PM AST Wed Oct 18 2017

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

$$

AMZ745-190915-
Coastal Waters OF Southwestern Puerto Rico out 10 NM-
457 PM AST Wed Oct 18 2017

.TONIGHT...East winds 10 to 15 knots. Seas 2 to 4 feet with
occasional seas up to 5 feet. Dominant Period 10 seconds.
Scattered showers and isolated thunderstorms.
.THURSDAY...Southeast winds 15 to 20 knots. Seas 3 to 5 feet with
occasional seas up to 6 feet. Dominant Period 10 seconds.
Southwest swell around 4 feet.
.THURSDAY NIGHT...East winds 15 to 20 knots. Seas 3 to 5 feet with
occasional seas up to 6 feet. Dominant Period 10 seconds.
Southwest swell around 4 feet. Isolated thunderstorms.
.FRIDAY...Southeast winds 10 to 15 knots. Seas 3 to 5 feet with
occasional seas up to 6 feet. Dominant Period 8 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 8 seconds.
.SATURDAY...East winds 10 to 15 knots. Seas 2 to 4 feet with
occasional seas up to 5 feet. Dominant Period 8 seconds. Isolated
showers.
.SUNDAY...East winds 10 to 15 knots. Seas 2 to 4 feet with
occasional seas up to 5 feet. Dominant Period 8 seconds. Isolated
showers.
.MONDAY...East winds 5 to 10 knots. Seas 1 to 3 feet. Dominant
Period 7 seconds. Isolated showers.

$$


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