Heights in feet above Mean Lower Low Water (MLLW). Dots are NOAA's predicted highs and lows; the line between them is our interpolation. Shaded: night.
| Tide | Time | Height |
|---|---|---|
| Low tide | 2:39 AM | -0.03 ft |
| High tide | 9:56 AM | 2.10 ft |
| Low tide | 4:39 PM | 0.61 ft |
| High tide | 9:12 PM | 1.10 ft |
| Day | High tides | Low tides |
|---|---|---|
| Today Tue, Oct 27 | 9:56 AM 2.1 ft9:12 PM 1.1 ft | 2:39 AM -0.0 ft4:39 PM 0.6 ft |
| Tomorrow Wed, Oct 28 | 10:48 AM 2.1 ft9:57 PM 1.1 ft | 3:23 AM -0.1 ft5:39 PM 0.6 ft |
| Thu, Oct 29 | 11:43 AM 2.1 ft10:48 PM 1.0 ft | 4:13 AM -0.1 ft6:39 PM 0.7 ft |
| Fri, Oct 30 | 12:42 PM 2.1 ft11:46 PM 1.0 ft | 5:09 AM -0.1 ft7:37 PM 0.7 ft |
| Sat, Oct 31 | 1:44 PM 2.0 ft | 6:11 AM 0.0 ft8:32 PM 0.7 ft |
| Sun, Nov 1 | 12:57 AM 1.1 ft2:45 PM 1.9 ft | 7:15 AM 0.1 ft9:23 PM 0.6 ft |
| Mon, Nov 2 | 2:19 AM 1.1 ft3:41 PM 1.8 ft | 8:23 AM 0.2 ft10:10 PM 0.6 ft |
Orange: measured by NOAA's sensor, last 24 hours (6-minute data, preliminary). Dashed: predicted tide, through the next 24 hours. The prediction contains only the astronomical tide; wind, air pressure and river flow move the real water level away from it.
All Puerto Rico tide stations →
On Tuesday, October 27, high tide at San Juan is at 9:56 AM (2.1 ft) and 9:12 PM (1.1 ft); low tide is at 2:39 AM (-0.0 ft) and 4:39 PM (0.6 ft) (AST, heights above MLLW). The table above lists the next 7 days.
The highest predicted tide in the next 12 months is 2.1 ft on October 28, 2026 at 10:48 AM. The largest tides fall a day or two after a full or new moon, especially when the Moon is closest to Earth.
Yes — on 189 days in the next 12 months the low tide drops below 0 ft (MLLW). The lowest is -0.6 ft on January 22, 2027 at 1:49 AM. Minus tides expose the most shoreline, which is why tide-poolers look for them.
Station local time (AST at the time this page was built), with daylight saving time applied where the area observes it — the same convention as NOAA's own tide tables.
From NOAA CO-OPS, the U.S. government tide station network (tidesandcurrents.noaa.gov); the predictions are public domain. The curve between highs and lows is our interpolation. This page is not for navigation.