San Juan tide times · NOAA station San Juan, La Puntilla, San Juan Bay
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Tide chart · today
The next 7 days
San Juan at a glance
- Tides
- Twice a day, unequal
- Typical range
- 1.6 fthigh to low
- Highest of 2027
- 2.0 ftSat, Oct 30
- Lowest of 2027
- -0.6 ftFri, Jan 22
- Record high
- 4.3 ftSep 18, 1989
- High water after the moon
- 9 h 07 min
The tide at San Juan
- Pattern
- Mixed, mainly twice-daily
Two highs and two lows on most days, but unequal ones. On average the higher high stands 0.5 ft above the lower high, and the lower low sits 0.4 ft below the higher low. Form number 0.94. - Typical range
- 1.6 ft from the higher high to the lower low on an average day (0.48 m) - a smaller range than 72% of the 235 places on this site. The mean range, high to low, is 1.1 ft.
- After the moon
- High water comes about 9 h 07 min after the moon is highest in the sky.
2027: the biggest and smallest tides
| Sat, Oct 30 | 9:38 am | 2.0 ft | |
| Sat, Oct 2 | 10:44 am | 2.0 ft | |
| Tue, Nov 16 | 10:52 am | 2.0 ft |
| Fri, Jan 22 | 1:49 am | -0.6 ft | in the dark |
| Fri, Feb 19 | 12:43 am | -0.4 ft | in the dark |
| Sat, Jun 5 | 2:37 pm | -0.4 ft | in daylight |
| Sat, Jun 5 | 2:37 pm | -0.4 ft | |
| Sat, Jul 3 | 1:27 pm | -0.4 ft | |
| Sat, May 8 | 3:47 pm | -0.3 ft |
200 low tides in 2027 drop below zero - below the average lower low water - and uncover more shore than usual.
Records
- Highest water recorded
- 4.3 ft (1.32 m) on Sep 18, 1989 - 2.8 ft above the average higher high.
- Lowest water recorded
- -1.1 ft (-0.33 m) on Dec 20, 1968.
- Highest tide the moon and sun can raise
- 2.2 ft (0.68 m) - the highest astronomical tide in NOAA’s 19-year cycle, which fell on Nov 7, 2025.
Tide times nearby
- Fajardo33 mi east
- Esperanza, Vieques49 mi southeast
- Culebra54 mi east
- La Parguera (Magueyes Island)70 mi southwest
- Mayaguez71 mi west
See the moon move the ocean - the same tide, on a globe seen from the moon.
Heights are above mean lower low water (MLLW), the zero of US charts; times are local. The year’s tides are NOAA’s official predictions - wind and air pressure can move the real water a foot or more. Form number: (K1+O1)/(M2+S2) from NOAA’s harmonic constants - below 0.25 twice-daily, above 3 once-daily. Puerto Rico, 18.459°N 66.116°W. Predictions and records: NOAA CO-OPS, station 9755371. Not for navigation or safety. For a boat, a crossing of sand that floods, or a swim, use the official tables and local advice. No ads, no tracking.