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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 now0.9 ftslack · predicted
Next high11:20 AM1.8 ft
Next low3:47 AM0.1 ft
0.1 ft 3:08 AM1.8 ft 10:38 AM0.6 ft 5:40 PM0.9 ft 9:37 PM

No active NWS marine or coastal alerts here

NOAA sensor 1.4 ft at 9:36 PM (+0.5 ft vs prediction)Times AST · NOAA source

Today and tomorrow

12 AM6 AM12 PM6 PM02Unusually high: 3.3 ft0.1 ft 3:08 AM1.8 ft 10:38 AM0.6 ft 5:40 PM0.9 ft 9:37 PM0.1 ft 3:47 AM1.8 ft 11:20 AM0.7 ft 6:28 PM0.9 ft 10:14 PM

Today Wednesday, Nov 11

TideTime (AST)Height
Low3:08 AM0.1 ft
High10:38 AM1.8 ft
Low5:40 PM0.6 ft
High9:37 PM0.9 ft

Tomorrow Thursday, Nov 12

TideTime (AST)Height
Low3:47 AM0.1 ft
High11:20 AM1.8 ft
Low6:28 PM0.7 ft
High10:14 PM0.9 ft

Friday Friday, Nov 13

TideTime (AST)Height
Low4:29 AM0.1 ft
High12:03 PM1.7 ft
Low7:15 PM0.7 ft

Active NWS alerts

No active NWS marine or coastal alerts cover this station right now (checked 9:52 PM AST).

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 1.4 ft at 9:36 PM.

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