Rock Slough Above Contra Costa Canal — CA, United States

Tide times & tide chart

2.2 ft12:12am-0.4 ft8:03am1.5 ft2:52pm0.9 ft8:10pmNow
Tide predictions for Rock Slough Above Contra Costa Canal, computed from harmonic constituents. High 2.2 feet on Mon 19 Oct 2026 at 00:10, low -0.4 feet on Mon 19 Oct 2026 at 08:00, above MLLW, the chart datum.
↑7:19am↓6:23pm

Predictions are not observations — conditions vary with weather and river flow. Not for navigation.

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Tide times for the next 7 days

Mon 19 Oct 2026 through Sun 25 Oct 2026. All times are local to Rock Slough Above Contra Costa Canal (America/Los_Angeles). Heights are in feet above MLLW.
DayTideTimeHeight
Mon 19 Oct 2026High2.2 ft
Mon 19 Oct 2026Low-0.4 ft
Mon 19 Oct 2026High1.5 ft
Mon 19 Oct 2026Low0.9 ft
Tue 20 Oct 2026High2.0 ft
Tue 20 Oct 2026Low-0.5 ft
Tue 20 Oct 2026High1.6 ft
Tue 20 Oct 2026Low0.6 ft
Wed 21 Oct 2026High1.9 ft
Wed 21 Oct 2026Low-0.6 ft
Wed 21 Oct 2026High1.7 ft
Wed 21 Oct 2026Low0.3 ft
Thu 22 Oct 2026High1.8 ft
Thu 22 Oct 2026Low-0.5 ft
Thu 22 Oct 2026High1.9 ft
Thu 22 Oct 2026Low0.0 ft
Fri 23 Oct 2026High1.8 ft
Fri 23 Oct 2026Low-0.3 ft
Fri 23 Oct 2026High2.2 ft
Fri 23 Oct 2026Low-0.1 ft
Sat 24 Oct 2026High1.8 ft
Sat 24 Oct 2026Low0.0 ft
Sat 24 Oct 2026High2.4 ft
Sun 25 Oct 2026Low-0.3 ft
Sun 25 Oct 2026High1.7 ft
Sun 25 Oct 2026Low0.4 ft
Sun 25 Oct 2026High2.7 ft

Station facts

Position
37.9771° N, 121.6422° W
Time zone
America/Los_Angeles
Datum
MLLW datum · computed from harmonic constituents
Source
Harmonic constituents from TICON-4
Region
CA, United States

Heights are measured above chart datum. A negative height means there is that much less water than the charted depth shows.

Slackwater database (https://github.com/openwatersio/slackwater-database). Source: Hart-Davis, M., Dettmering, D., Seitz, F. (2025), TICON-4: TIdal CONstants based on GESLA-4 sea-level records, SEANOE, https://doi.org/10.17882/109129. Licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Modified: see https://github.com/openwatersio/slackwater-database#modifications-to-source-data

How we check predictions — dated samples and their limits.

Nearby

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