West Coast
Rio Vista
California · NOAA station 9415316 · Tide predictions
38.1450, -121.6920
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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 · 57 mi SW · Station 46237
Wind & wave reports →
Nearby tide stations
- Threemile Slough · 2.7 mi S
- Steamboat Slough, Snug Harbor Marina · 3.3 mi NE
- Threemile Slough entrance · 4.0 mi S
- Georgiana Slough entrance · 6.3 mi E
- False River · 6.5 mi S
Plan ahead
2027 tide extremes for this station
Highest predicted high tide: 4.6 ft — Sat Jul 3 · 2:19 AM
Lowest predicted low tide: -0.7 ft — Fri May 21 · 12:18 PM
Biggest single-day swing: 5.1 ft on Sun Jun 6
Best daytime minus tides of 2027
| Date | Low tide | Height |
|---|---|---|
| Fri May 21 | 12:18 PM | -0.7 ft |
| Sat May 22 | 12:58 PM | -0.7 ft |
| Fri Jun 18 | 11:18 AM | -0.7 ft |
| Sat Jun 19 | 11:56 AM | -0.7 ft |
| Thu May 20 | 11:35 AM | -0.7 ft |
| Sun Jun 6 | 12:51 PM | -0.6 ft |
| Thu Jun 17 | 10:35 AM | -0.6 ft |
| Sun May 23 | 1:36 PM | -0.6 ft |
| Sun Jun 20 | 12:32 PM | -0.6 ft |
| Mon Jun 7 | 1:34 PM | -0.6 ft |
108 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
Rio Vista 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.