West Coast
Mare Island
California · NOAA station 9415218 · Tide predictions
38.0700, -122.2500
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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 · 29 mi SW · Station 46237
Wind & wave reports →
Nearby tide stations
- Selby · 0.9 mi SE
- Crockett · 1.7 mi SE
- Vallejo, Mare Island Strait · 3.1 mi NW
- Hercules, Refugio Landing · 4.0 mi SW
- Benicia · 6.8 mi E
Plan ahead
2027 tide extremes for this station
Highest predicted high tide: 6.7 ft — Sun Jul 4 · 12:32 AM
Lowest predicted low tide: -1.3 ft — Sun Jun 6 · 9:31 AM
Biggest single-day swing: 7.9 ft on Sun Jul 4
Best daytime minus tides of 2027
| Date | Low tide | Height |
|---|---|---|
| Sun Jun 6 | 9:31 AM | -1.3 ft |
| Mon Jul 5 | 9:14 AM | -1.3 ft |
| Mon Jun 7 | 10:18 AM | -1.2 ft |
| Sun Jul 4 | 8:31 AM | -1.2 ft |
| Thu Jan 21 | 6:48 PM | -1.2 ft |
| Sat Jun 5 | 8:45 AM | -1.2 ft |
| Tue Jul 6 | 9:57 AM | -1.1 ft |
| Tue Jun 8 | 11:05 AM | -1.0 ft |
| Sat Jul 3 | 7:45 AM | -1.0 ft |
| Wed Jan 20 | 6:02 PM | -1.0 ft |
171 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
Mare Island is one of NOAA's reference tide stations — its predictions are computed directly from harmonic analysis of water levels observed here, and other nearby stations are calculated from it.
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.