(1/4)
Latest Coastal Waters Forecast by TJSJ
Issued 5/18/2026 3:40 PM America/Puerto_Rico.
Valid through 5/19/2026 4:15 AM America/Puerto_Rico.
fzca52 tjsj 181940
cwfsju
expires:202605190815;;784141
coastal waters forecast
national weather service san juan pr
340 pm ast mon may 18 2026
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 waves...along with the occasional height of the average
highest 10 percent of the waves.
amz712-190815-
coastal waters of northern puerto rico out 10 nm-
340 pm ast mon may 18 2026
...small craft should exercise caution...
.tonight...east winds 15 to 20 knots, diminishing to 10 to 15 knots
late this evening and overnight. seas 5 to 6 feet, occasionally to
8 feet. wave detail: east 5 feet at 8 seconds and north 1 foot at
8 seconds. isolated showers early this evening. scattered showers
late this evening, then isolated showers after midnight.
.tuesday...east winds 15 to 20 knots with gusts up to 30 knots. seas
4 to 5 feet, occasionally to 6 feet. wave detail: east 5 feet at
8 seconds and north 1 foot at 8 seconds. scattered showers in the
afternoon.
.tuesday night...east winds 10 to 15 knots with gusts up to
25 knots. seas 5 to 6 feet, occasionally to 8 feet. wave detail:
east 5 feet at 8 seconds and north 1 foot at 7 seconds. scattered
showers in the evening.
.wednesday...east winds 15 to 20 knots with gusts up to 30 knots.
seas 5 to 6 feet, occasionally to 8 feet. wave detail: east 6 feet
at 8 seconds. scattered showers.
.wednesday night...east winds 15 to 20 knots, diminishing to 10 to
15 knots after midnight. gusts up to 30 knots. seas 4 to 6 feet,
occasionally to 8 feet. wave detail: east 6 feet at 8 seconds.
scattered showers.
.thursday...east winds 10 to 15 knots, increasing to 15 to 20 knots
in the afternoon. seas 4 to 5 feet, occasionally to 6 feet. wave
detail: east 5 feet at 8 seconds. scattered showers in the
afternoon.
.thursday night...east winds 10 to 15 knots with gusts up to
25 knots. seas 4 to 5 feet, occasionally to 6 feet. scattered
showers.
.friday...east winds 10 to 15 knots, increasing to 15 to 20 knots in
the afternoon. seas 4 to 5 feet, occasionally to 6 feet. scattered
showers.
.friday night...east winds 10 to 15 knots. seas 4 to 5 feet,
occasionally to 6 feet.
.saturday...east winds 10 to 15 knots, increasing to 15 to 20 knots
in the afternoon. seas 4 to 5 feet, occasionally to 6 feet.
.saturday night...east winds 15 to 20 knots, diminishing to 10 to
15 knots after midnight. seas 4 to 5 feet, occasionally to 6 feet.
scattered showers.
$$
(2/4)
Latest Coastal Waters Forecast by TJSJ
Issued 5/18/2026 3:40 PM America/Puerto_Rico.
Valid through 5/19/2026 4:15 AM America/Puerto_Rico.
fzca52 tjsj 181940
cwfsju
expires:202605190815;;784146
coastal waters forecast
national weather service san juan pr
340 pm ast mon may 18 2026
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 waves...along with the occasional height of the average
highest 10 percent of the waves.
amz735-190815-
coastal waters of southern puerto rico out 10 nm-
340 pm ast mon may 18 2026
...small craft should exercise caution...
.tonight...east winds 10 to 15 knots, increasing to 15 to 20 knots
late this evening, then diminishing to 10 to 15 knots after
midnight. seas 3 to 5 feet, occasionally to 6 feet. wave detail:
east 5 feet at 7 seconds. isolated showers early this evening.
scattered showers late this evening, then isolated showers after
midnight.
.tuesday...east winds 10 to 15 knots, increasing to 15 to 20 knots
in the afternoon. seas 3 to 5 feet, occasionally to 6 feet. wave
detail: east 5 feet at 7 seconds.
.tuesday night...east winds 10 to 15 knots with gusts up to
25 knots. seas 3 to 5 feet, occasionally to 6 feet. wave detail:
east 4 feet at 7 seconds. scattered showers after midnight.
.wednesday...east winds 15 to 20 knots with gusts up to 25 knots.
seas 3 to 5 feet, occasionally to 6 feet. wave detail: east 5 feet
at 7 seconds. scattered showers in the morning.
.wednesday night...east winds 15 to 20 knots, diminishing to 10 to
15 knots after midnight. seas 3 to 5 feet, occasionally to 6 feet.
wave detail: east 5 feet at 7 seconds. scattered showers.
.thursday...east winds 10 to 15 knots with gusts up to 25 knots.
seas 3 to 5 feet, occasionally to 6 feet. wave detail: east 5 feet
at 7 seconds. scattered showers in the morning.
.thursday night...east winds 10 to 15 knots with gusts up to
20 knots. seas 3 to 4 feet, occasionally to 5 feet.
.friday...east winds 10 to 15 knots. seas 3 to 4 feet, occasionally
to 5 feet.
.friday night...east winds 10 to 15 knots. seas 3 to 4 feet,
occasionally to 5 feet.
.saturday...east winds 10 to 15 knots. seas 3 to 4 feet,
occasionally to 5 feet.
.saturday night...east winds 10 to 15 knots. seas 3 to 4 feet,
occasionally to 5 feet.
$$
(3/4)
Latest Coastal Waters Forecast by TJSJ
Issued 5/18/2026 3:40 PM America/Puerto_Rico.
Valid through 5/19/2026 4:15 AM America/Puerto_Rico.
fzca52 tjsj 181940
cwfsju
expires:202605190815;;784148
coastal waters forecast
national weather service san juan pr
340 pm ast mon may 18 2026
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 waves...along with the occasional height of the average
highest 10 percent of the waves.
amz742-190815-
coastal waters of northwestern puerto rico out 10 nm-
340 pm ast mon may 18 2026
.tonight...east winds 10 to 15 knots with gusts up to 20 knots,
diminishing to 5 to 10 knots with gusts up to 20 knots late this
evening and overnight. seas 2 to 4 feet, occasionally to 5 feet.
wave detail: east 3 feet at 7 seconds. scattered showers with
isolated thunderstorms early this evening, then isolated showers
late this evening.
.tuesday...east winds 5 to 10 knots. seas 2 to 4 feet, occasionally
to 5 feet. wave detail: northeast 3 feet at 7 seconds and north
1 foot at 9 seconds. scattered showers in the afternoon.
.tuesday night...east winds 10 to 15 knots with gusts up to
20 knots. seas 2 to 4 feet, occasionally to 5 feet. wave detail:
east 3 feet at 7 seconds and north 1 foot at 8 seconds. scattered
showers in the evening.
.wednesday...east winds 10 to 15 knots, diminishing to 5 to 10 knots
in the afternoon. seas 2 to 4 feet, occasionally to 5 feet. wave
detail: northeast 3 feet at 7 seconds. numerous showers in the
afternoon.
.wednesday night...east winds 10 to 15 knots with gusts up to
20 knots. seas 2 to 4 feet, occasionally to 5 feet. wave detail:
east 3 feet at 7 seconds. scattered showers in the evening.
.thursday...east winds 5 to 10 knots. seas 2 to 4 feet, occasionally
to 5 feet. wave detail: northeast 3 feet at 7 seconds. numerous
showers in the afternoon.
.thursday night...east winds 5 to 10 knots. seas 2 to 3 feet.
scattered showers.
.friday...east winds 5 to 10 knots, becoming northeast 10 to
15 knots in the afternoon. seas 2 to 3 feet. numerous showers in the
afternoon.
.friday night...east winds 10 to 15 knots, diminishing to 5 to
10 knots after midnight. seas 2 to 3 feet. scattered showers.
.saturday...east winds 5 to 10 knots. seas 2 to 3 feet. scattered
showers in the afternoon.
.saturday night...east winds 10 to 15 knots. seas 2 to 4 feet,
occasionally to 5 feet.
winds and seas higher in and near thunderstorms.
$$
(4/4)
Latest Coastal Waters Forecast by TJSJ
Issued 5/18/2026 3:40 PM America/Puerto_Rico.
Valid through 5/19/2026 4:15 AM America/Puerto_Rico.
fzca52 tjsj 181940
cwfsju
expires:202605190815;;784149
coastal waters forecast
national weather service san juan pr
340 pm ast mon may 18 2026
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 waves...along with the occasional height of the average
highest 10 percent of the waves.
amz745-190815-
coastal waters of southwestern puerto rico out 10 nm-
340 pm ast mon may 18 2026
.tonight...east winds 5 to 10 knots, increasing to 10 to 15 knots
with gusts up to 20 knots late this evening and overnight. seas 2 to
3 feet. wave detail: southeast 2 feet at 6 seconds. isolated showers
early this evening, then scattered showers late this evening.
.tuesday...east winds 10 to 15 knots with gusts up to 25 knots. seas
2 to 3 feet. wave detail: southeast 3 feet at 6 seconds.
.tuesday night...east winds 10 to 15 knots with gusts up to
20 knots, diminishing to 5 to 10 knots after midnight. seas 2 to
3 feet. wave detail: southeast 3 feet at 6 seconds and north 1 foot
at 8 seconds.
.wednesday...east winds 10 to 15 knots with gusts up to 25 knots.
seas 2 to 3 feet. wave detail: southeast 3 feet at 6 seconds and
north 1 foot at 7 seconds.
.wednesday night...east winds 10 to 15 knots with gusts up to
25 knots. seas 2 to 3 feet. wave detail: southeast 3 feet at
5 seconds and north 1 foot at 6 seconds.
.thursday...east winds 10 to 15 knots with gusts up to 20 knots.
seas 2 to 3 feet. wave detail: southeast 2 feet at 6 seconds.
.thursday night...east winds 5 to 10 knots. seas 2 to 3 feet.
.friday...east winds 5 to 10 knots, increasing to 10 to 15 knots in
the afternoon. seas 2 to 3 feet.
.friday night...east winds 10 to 15 knots. seas 2 to 3 feet.
scattered showers.
.saturday...east winds 5 to 10 knots, increasing to 10 to 15 knots
in the afternoon. seas 2 to 3 feet. scattered showers in the
afternoon.
.saturday night...east winds 10 to 15 knots, diminishing to 5 to
10 knots after midnight. seas 2 to 3 feet.
$$
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