West Coast
Blackslough Landing
California · NOAA station 9415021 · Tide predictions
37.9950, -121.4200
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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 · 68 mi W · Station 46237
Wind & wave reports →
Nearby tide stations
- Bishop Cut, Disappointment Slough · 3.5 mi N
- Holt, Whiskey Slough · 4.2 mi S
- Wards Island, Little Connection Slough · 5.7 mi NW
- Stockton · 7.5 mi E
- Borden Highway Bridge, Middle River · 8.0 mi SW
Plan ahead
2027 tide extremes for this station
Highest predicted high tide: 4.8 ft — Sun Jul 4 · 5:43 AM
Lowest predicted low tide: -0.6 ft — Sun Jun 6 · 2:22 PM
Biggest single-day swing: 5.2 ft on Sun Jul 4
Best daytime minus tides of 2027
| Date | Low tide | Height |
|---|---|---|
| Sun Jun 6 | 2:22 PM | -0.6 ft |
| Sat Jun 5 | 1:33 PM | -0.6 ft |
| Mon Jun 7 | 3:10 PM | -0.5 ft |
| Sat May 8 | 2:38 PM | -0.5 ft |
| Fri May 7 | 1:49 PM | -0.5 ft |
| Fri Jun 4 | 12:44 PM | -0.5 ft |
| Sun May 9 | 3:29 PM | -0.5 ft |
| Thu May 6 | 1:01 PM | -0.5 ft |
| Sun Jul 4 | 1:14 PM | -0.4 ft |
| Mon Jul 5 | 2:00 PM | -0.4 ft |
152 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
Blackslough Landing 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.