Tides Today & Tomorrow in Redwood City, CA

TIDE TIMES for Friday, August 21, 2026
The tide is currently rising in Redwood City, CA.
Next low tide : 1:48 pm (4.1 ft)
Next high tide : in 1h 43m at 8:59 am (6.0 ft)
Sunset today : 7:53 pm
Sunrise tomorrow : 6:30 am
Moon phase : First Quarter (66% illuminated)
Tide Station Location : Station #9414523
Common Questions About Tides

Redwood City, CA Tides - Jun 1933

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Thu5:146.36:477.211:490.84:497:23First Quarter1Thu
2Fri6:356.07:257.71:052.412:441.24:487:24First Quarter2Fri
3Sat7:556.08:048.22:081.51:401.74:487:25Waxing Gibbous3Sat
4Sun9:116.18:448.73:060.62:362.24:487:25Waxing Gibbous4Sun
5Mon10:226.39:289.14:02-0.33:332.74:477:26Waxing Gibbous5Mon
6Tue11:286.610:149.44:55-1.14:303.14:477:27Full Moon6Tue
7Wed12:296.95:46-1.75:273.34:477:27Full Moon7Wed
8Thu1:267.16:37-2.06:223.34:477:28Full Moon8Thu
9Fri2:207.37:27-2.17:183.34:477:28Waning Gibbous9Fri
10Sat12:489.23:107.48:17-1.98:153.14:477:29Waning Gibbous10Sat
11Sun1:448.73:587.59:05-1.69:133.04:467:29Waning Gibbous11Sun
12Mon2:448.14:457.69:52-1.010:142.74:467:30Waning Gibbous12Mon
13Tue3:477.45:327.710:40-0.311:212.54:467:30Third Quarter13Tue
14Wed4:556.76:177.911:290.44:467:30Third Quarter14Wed
15Thu6:096.17:008.112:302.012:191.14:467:31Third Quarter15Thu
16Fri7:245.97:418.31:371.51:101.84:467:31Third Quarter16Fri
17Sat8:365.88:208.42:370.92:012.44:477:32Waning Crescent17Sat
18Sun9:426.08:578.43:300.32:512.94:477:32Waning Crescent18Sun
19Mon10:426.29:338.44:18-0.13:413.34:477:32Waning Crescent19Mon
20Tue11:346.510:108.45:01-0.44:293.64:477:32Waning Crescent20Tue
21Wed12:216.75:41-0.55:153.74:477:33New Moon21Wed
22Thu1:056.86:18-0.65:573.84:477:33New Moon22Thu
23Fri1:456.86:52-0.66:383.74:487:33New Moon23Fri
24Sat2:226.87:25-0.67:183.64:487:33New Moon24Sat
25Sun12:358.12:566.87:56-0.57:583.54:487:33Waxing Crescent25Sun
26Mon1:148.03:276.98:26-0.48:403.44:497:33Waxing Crescent26Mon
27Tue1:567.73:577.08:59-0.39:263.24:497:33Waxing Crescent27Tue
28Wed2:447.34:277.29:340.110:182.94:497:33Waxing Crescent28Wed
29Thu3:406.85:027.510:130.611:212.54:507:33First Quarter29Thu
30Fri4:496.25:417.910:591.24:507:33First Quarter30Fri
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (9414523)

Common Questions About Redwood City, CA Tides

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

Slack tide in Redwood City, CA is approximately 11:23 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 transitional phase. Tonight's moon is 66% 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 shifting between spring and neap.

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 (66% illuminated). This places Redwood City, CA in a transitional tide cycle, so tidal ranges are shifting between spring and neap 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