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San Juan, PR tide chart and marine alerts

NOAA station 9755371 · 18.459°N, 66.116°W. Get an email only when the NWS issues a marine or coastal alert here, or the tide runs unusually high or low.

NOAA station 9755371

San Juan, PR

Tide now0.4 ft↓ falling · predicted

Next high12:03 PM1.7 ft

Next low4:29 AM0.1 ft

WindESE 7 ktgusts 10
Water86°F
Air82°F
NOAA sensors · 1:36 AM

No active NWS marine or coastal alerts here

NOAA sensor 1.0 ft at 1:36 AM (+0.5 ft vs prediction)Times AST · NOAA source

Today and tomorrow

Next 7 days Shape drawn between NOAA's predicted highs and lows

7-day tides, sun and moon Times AST · feet above MLLW

Day	High tides	Low tides	Sunrise Sunset	Moon
Fri, Nov 13	12:03 PM 1.7 ft10:54 PM 0.9 ft	4:29 AM 0.1 ft7:15 PM 0.7 ft	6:29 AM 5:48 PM	Waxing crescent 17%
Sat, Nov 14	12:48 PM 1.6 ft11:41 PM 0.9 ft	5:14 AM 0.2 ft7:56 PM 0.7 ft	6:30 AM 5:47 PM	Waxing crescent 25%
Sun, Nov 15	1:32 PM 1.6 ft	6:03 AM 0.3 ft8:32 PM 0.7 ft	6:30 AM 5:47 PM	Waxing crescent 34%
Mon, Nov 16	12:41 AM 0.9 ft2:16 PM 1.5 ft	6:55 AM 0.3 ft9:02 PM 0.6 ft	6:31 AM 5:47 PM	Waxing crescent 43%
Tue, Nov 17	1:56 AM 0.9 ft2:56 PM 1.5 ft	7:50 AM 0.4 ft9:32 PM 0.5 ft	6:32 AM 5:47 PM	First quarter 53%
Wed, Nov 18	3:15 AM 1.0 ft3:35 PM 1.4 ft	8:52 AM 0.5 ft10:04 PM 0.4 ft	6:32 AM 5:47 PM	Waxing gibbous 63%
Thu, Nov 19	—	—	6:33 AM 5:47 PM	Waxing gibbous 72%

Tides: NOAA CO-OPS predictions. Sun and moon: computed for this station's coordinates with NOAA's solar equations and standard lunar formulas.

Today Friday, Nov 13

Tide	Time (AST)	Height
Low	4:29 AM	0.1 ft
High	12:03 PM	1.7 ft
Low	7:15 PM	0.7 ft
High	10:54 PM	0.9 ft

Tomorrow Saturday, Nov 14

Tide	Time (AST)	Height
Low	5:14 AM	0.2 ft
High	12:48 PM	1.6 ft
Low	7:56 PM	0.7 ft
High	11:41 PM	0.9 ft

Sunday Sunday, Nov 15

Tide	Time (AST)	Height
Low	6:03 AM	0.3 ft
High	1:32 PM	1.6 ft
Low	8:32 PM	0.7 ft

Active NWS alerts

No active NWS marine or coastal alerts cover this station right now (checked 1:48 AM AST).

Marine forecast AMZ712 · Coastal Waters of Northern Puerto Rico out 10 NM

Tonight: Southeast winds 5 to 10 knots with gusts up to 20 knots. Seas around 4 feet, occasionally to 5 feet. Wave Detail: East 3 feet at 5 seconds and northeast 3 feet at 10 seconds. Isolated showers.
Friday: Southeast winds 10 to 15 knots with gusts up to 25 knots. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: East 3 feet at 5 seconds and north 2 feet at 9 seconds. Scattered showers in the morning.
Friday Night: Southeast winds 10 to 15 knots with gusts up to 25 knots. Seas around 4 feet, occasionally to 5 feet. Wave Detail: East 3 feet at 6 seconds and north 2 feet at 9 seconds.
Saturday: Southeast winds 10 to 15 knots with gusts up to 20 knots. Seas around 4 feet, occasionally to 5 feet. Wave Detail: East 3 feet at 6 seconds and northeast 2 feet at 10 seconds. Scattered showers in the afternoon.
Saturday Night: Southeast winds 10 to 15 knots, diminishing to 5 to 10 knots after midnight. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 3 feet at 6 seconds and northeast 2 feet at 11 seconds.
Sunday: Southeast winds 5 to 10 knots, becoming east 10 to 15 knots with gusts up to 20 knots in the afternoon. Seas around 3 feet. Wave Detail: East 3 feet at 6 seconds and northeast 3 feet at 10 seconds.
Sunday Night: East winds 10 to 15 knots with gusts up to 20 knots, diminishing to 5 to 10 knots after midnight. Seas 3 to 4 feet, occasionally to 5 feet.
Monday: East winds 5 to 10 knots, increasing to 10 to 15 knots in the afternoon. Seas 3 to 4 feet, occasionally to 5 feet. Scattered showers in the afternoon.
Monday Night: East winds 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet.
Tuesday: East winds 10 to 15 knots. Seas around 4 feet, occasionally to 5 feet.

National Weather Service, issued Thu 5:50 PM AST. Official forecast for AMZ712

Unusual tides here

We flag a predicted high at or above 3.3 ft MLLW (NOAA's minor high-tide flooding threshold for this station). We flag a predicted low at or below −1.0 ft MLLW. Mean higher high water is 1.6 ft.

No predicted tide in the next few days crosses either line.

Official sources

Predictions are astronomical tides. Wind and pressure can move the real water level a foot or more. NOAA's sensor here read 1.0 ft at 1:36 AM.

Nearby stations

Esperanza, Vieques Island, PR 49 mi
Culebra, PR 54 mi
Magueyes Island, PR 70 mi
Mayaguez, PR 71 mi
Charlotte Amalie, St. Thomas, VI 79 mi
Christiansted Harbor, St Croix, VI 105 mi

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San Juan, PR: common questions

When is the next high tide at San Juan, PR?

NOAA predicts the next high tide at San Juan, PR at Fri 12:03 PM AST, 1.7 ft above mean lower low water (MLLW).

When is the next low tide at San Juan, PR?

The next predicted low tide is at Fri 4:29 AM AST, 0.1 ft relative to MLLW.

What is the water temperature at San Juan, PR?

NOAA's sensor at station 9755371 read 86°F at Fri 1:36 AM AST.

Is there a marine alert for San Juan, PR right now?

No. When this page was built, no NWS marine or coastal alert covered this station.

What are these tide heights measured from?

Heights are in feet above mean lower low water (MLLW), the average of the lower of the two daily low tides. A negative number means the water is below that average.

How do I get an email when something happens at San Juan, PR?

Enter your email at the top of this page. You get one confirmation email, then nothing until the NWS issues a marine or coastal alert here or the tide is predicted unusually high or low. Unsubscribe in one click.