West Coast
Alcatraz Island
California · NOAA station 9414792 · Tide predictions
37.8267, -122.4170
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48-hour outlook
Drag across the curve to inspect any time. Weather icons show the forecast at each high tide.
Drawn from the high/low predictions — NOAA publishes high/low only for this station.
The next seven days
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H = high tide · L = low tide · highs & lows in local time
On the water nearby
San Francisco Bar, CA (142) buoy · 12 mi W · Station 46237
Wind & wave reports →
Nearby tide stations
- San Francisco, North Point, Pier 41 · 1.2 mi S
- Angel Island, East Garrison · 2.5 mi N
- Angel Island (west side) · 2.7 mi NW
- SAN FRANCISCO (Golden Gate) · 3.0 mi SW
- Rincon Point, Pier 22 1/2 · 3.0 mi SE
Plan ahead
2027 tide extremes for this station
Highest predicted high tide: 7.1 ft — Thu Jan 21 · 9:53 AM
Lowest predicted low tide: -1.8 ft — Sun Jun 6 · 7:39 AM
Biggest single-day swing: 8.7 ft on Thu Jan 21
Best daytime minus tides of 2027
| Date | Low tide | Height |
|---|---|---|
| Sun Jun 6 | 7:39 AM | -1.8 ft |
| Mon Jul 5 | 7:24 AM | -1.7 ft |
| Mon Jun 7 | 8:28 AM | -1.7 ft |
| Thu Jan 21 | 4:58 PM | -1.6 ft |
| Fri Jan 22 | 5:42 PM | -1.6 ft |
| Tue Dec 14 | 6:14 PM | -1.5 ft |
| Wed Dec 15 | 7:00 PM | -1.5 ft |
| Sat May 8 | 7:49 AM | -1.4 ft |
| Tue Jul 6 | 8:09 AM | -1.4 ft |
| Sun May 9 | 8:40 AM | -1.4 ft |
189 minus tides (below 0 ft) are predicted here in 2027. The table shows up to the 10 lowest that fall between 7 AM and 7 PM — the ones worth planning a clam dig or tidepool walk around.
About this station
NOAA builds the predictions for Alcatraz Island from the SAN FRANCISCO (Golden Gate) station: high tides adjusted +0.0 ft, 14 min later; low tides adjusted +0.0 ft, 18 min later.
Mixed semidiurnal tides — two unequal highs and two unequal lows a day — with ranges growing as you head north. Harbor entrances feel the swell as much as the tide.