Tides Today & Tomorrow in Redwood City, CA

TIDE TIMES for Wednesday, August 19, 2026
The tide is currently rising in Redwood City, CA.
Next low tide : 11:36 am (3.2 ft)
Next high tide : in 1h 35m at 6:27 am (6.0 ft)
Sunset today : 7:56 pm
Sunrise tomorrow : 6:28 am
Moon phase : First Quarter (47% illuminated)
Tide Station Location : Station #9414523
Common Questions About Tides

Redwood City, CA Tides - Apr 1936

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Wed8:166.99:347.32:282.33:060.45:536:31Waxing Gibbous1Wed
2Thu9:147.010:127.53:241.73:490.55:526:32Waxing Gibbous2Thu
3Fri10:067.110:457.64:121.24:270.75:506:33Waxing Gibbous3Fri
4Sat10:527.111:147.74:550.75:011.05:496:34Waxing Gibbous4Sat
5Sun11:367.111:397.85:350.45:341.35:476:35Full Moon5Sun
6Mon12:187.06:120.26:051.75:466:36Full Moon6Mon
7Tue12:017.81:006.86:460.16:352.15:446:36Full Moon7Tue
8Wed12:227.81:426.77:190.07:072.45:436:37Full Moon8Wed
9Thu12:447.92:256.57:520.07:402.75:426:38Waning Gibbous9Thu
10Fri1:117.93:116.38:260.18:173.05:406:39Waning Gibbous10Fri
11Sat1:457.84:026.19:050.19:013.35:396:40Waning Gibbous11Sat
12Sun2:277.65:005.99:520.39:563.55:376:41Waning Gibbous12Sun
13Mon3:217.46:046.010:500.411:053.55:366:42Third Quarter13Mon
14Tue4:287.07:046.211:570.45:346:43Third Quarter14Tue
15Wed5:506.97:566.612:243.21:040.45:336:44Third Quarter15Wed
16Thu7:126.98:417.11:362.62:030.35:326:44Waning Crescent16Thu
17Fri8:267.19:227.72:401.82:570.35:306:45Waning Crescent17Fri
18Sat9:337.310:018.23:370.83:470.45:296:46Waning Crescent18Sat
19Sun10:357.410:398.74:31-0.14:350.75:286:47Waning Crescent19Sun
20Mon11:357.511:179.05:22-0.85:221.15:266:48New Moon20Mon
21Tue12:337.56:12-1.46:091.55:256:49New Moon21Tue
22Wed1:307.47:02-1.66:562.05:246:50New Moon22Wed
23Thu12:389.12:287.27:51-1.67:462.45:226:51Waxing Crescent23Thu
24Fri1:238.83:267.08:42-1.38:392.75:216:52Waxing Crescent24Fri
25Sat2:128.44:246.99:34-0.99:363.05:206:53Waxing Crescent25Sat
26Sun3:077.85:236.810:28-0.410:393.15:196:54First Quarter26Sun
27Mon4:107.16:226.811:270.111:503.05:176:54First Quarter27Mon
28Tue5:226.67:167.012:270.55:166:55First Quarter28Tue
29Wed6:376.38:037.21:012.61:230.85:156:56First Quarter29Wed
30Thu7:476.28:457.52:042.02:131.05:146:57Waxing Gibbous30Thu
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (9414523)

Common Questions About Redwood City, CA Tides

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What time does the tide turn (slack tide) in Redwood City, CA today?

Slack tide in Redwood City, CA is approximately 9:01 am — midway between the next high and low tide, when tidal current is weakest. This is the preferred window for boat crossings, underwater visibility, and fishing in areas with strong currents.

Is this week a spring tide or neap tide in Redwood City, CA?

Redwood City, CA is currently in a neap phase. Tonight's moon is 47% illuminated. Spring tides (largest swings) occur near new and full moons; neap tides (smallest swings) occur near first and third quarter moons. Tidal ranges this week are near their weekly minimum.

What datum are Redwood City, CA tide heights measured from?

Tide heights on this page are measured from Mean Lower Low Water (MLLW), the U.S. NOAA standard. A height of 0 ft represents the 19-year average of each day's lower low tide. Negative values indicate a "minus tide" — water levels below that long-term reference.

What factors can affect the tide predictions for Redwood City, CA?

Tide predictions for Redwood City, CA come from NOAA's harmonic analysis and are typically accurate within about ±10 minutes on timing and ±0.5 ft on height. Actual water levels can deviate further due to sustained winds, atmospheric pressure changes, river flow, and storm surge. During major weather events, be sure to check US Harbors weather pages for factors that could impact tidal predictions.

Which NOAA station provides tide data for Redwood City, CA?

Tide data for Redwood City, CA is sourced from NOAA Station #9414523. View the official NOAA station page at https://tidesandcurrents.noaa.gov/stationhome.html?id=9414523.

What is the moon phase in Redwood City, CA tonight?

Tonight the moon over Redwood City, CA is First Quarter (47% illuminated). This places Redwood City, CA in a neap tide cycle, so tidal ranges are near their weekly minimum this week.

US Harbors Tidal Data

The data in our tide charts, tide tables, and tide graphs is provided by NOAA and others. These predictions are derived mathematically from numerous inputs, including data from historical tide stations and nearby locations where sensors are actively recording. As shown in the tide graph at the top of this page, “Predicted” tides (blue) are what forecasting models expect to happen. “Observed” tides (red) are those recorded by local sensors in real time, overlaid on the predictions for direct comparison. We display Observed water levels for a select group of harbors including Portland, Maine, where a physical sensor monitors water levels in real time.

LEARN MORE ABOUT OUR TIDE DATA