Tides Today & Tomorrow in Port Chicago, CA

TIDE TIMES for Friday, August 21, 2026
The tide is currently rising in Port Chicago, CA.
Next low tide (tomorrow) : 5:39 am (0.4 ft)
Next high tide : in 21m at 9:03 pm (4.7 ft)
Sunset today : 7:53 pm
Sunrise tomorrow : 6:28 am
Moon phase : First Quarter (66% illuminated)
Tide Station Location : Station #9415144
Common Questions About Tides

Port Chicago, CA Tides - Mar 2058

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Fri6:054.58:153.312:011.42:060.66:386:01First Quarter1Fri
2Sat6:534.49:283.512:561.83:170.46:376:02First Quarter2Sat
3Sun7:544.410:323.72:042.14:200.36:356:03First Quarter3Sun
4Mon9:014.411:253.93:172.25:140.16:346:04Waxing Gibbous4Mon
5Tue10:024.44:232.25:590.06:336:05Waxing Gibbous5Tue
6Wed12:114.110:55 AM4.55:192.06:38-0.16:316:06Waxing Gibbous6Wed
7Thu12:514.211:40 AM4.66:081.87:12-0.16:306:07Waxing Gibbous7Thu
8Fri1:264.212:224.66:531.57:400.06:286:08Full Moon8Fri
9Sat1:564.21:024.57:341.38:030.16:276:09Full Moon9Sat
10Sun3:194.22:424.59:121.19:230.27:257:10Full Moon10Sun
11Mon3:364.33:244.39:490.99:440.37:247:11Full Moon11Mon
12Tue3:504.44:094.110:270.710:110.57:227:12Waning Gibbous12Tue
13Wed4:114.65:003.911:060.510:450.77:217:13Waning Gibbous13Wed
14Thu4:404.96:023.611:530.511:241.17:197:14Waning Gibbous14Thu
15Fri5:185.07:213.312:530.57:187:15Waning Gibbous15Fri
16Sat6:035.08:503.312:121.52:160.57:167:16Third Quarter16Sat
17Sun6:594.910:113.41:101.93:440.47:157:17Third Quarter17Sun
18Mon8:084.811:173.72:262.14:570.27:137:18Third Quarter18Mon
19Tue9:334.73:542.25:57-0.17:127:19Waning Crescent19Tue
20Wed12:124.010:57 AM4.85:151.96:48-0.37:107:20Waning Crescent20Wed
21Thu12:584.212:074.96:221.67:33-0.37:087:21Waning Crescent21Thu
22Fri1:404.41:064.97:201.28:13-0.37:077:22New Moon22Fri
23Sat2:174.61:594.88:140.88:50-0.17:057:23New Moon23Sat
24Sun2:524.62:514.69:050.59:230.17:047:24New Moon24Sun
25Mon3:234.73:424.49:540.39:540.47:027:25New Moon25Mon
26Tue3:524.84:354.110:420.210:250.87:017:25Waxing Crescent26Tue
27Wed4:184.85:323.811:300.210:571.16:597:26Waxing Crescent27Wed
28Thu4:444.86:363.612:210.26:587:27Waxing Crescent28Thu
29Fri5:154.77:453.51:190.36:567:28Waxing Crescent29Fri
30Sat5:524.58:563.512:211.82:240.46:557:29First Quarter30Sat
31Sun6:414.310:033.61:222.13:320.36:537:30First Quarter31Sun
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (9415144)

Common Questions About Port Chicago, CA Tides

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What time does the tide turn (slack tide) in Port Chicago, CA today?

Slack tide in Port Chicago, CA is approximately 1:21 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 Port Chicago, CA?

Port Chicago, 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 Port Chicago, 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 Port Chicago, CA?

Tide predictions for Port Chicago, 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 Port Chicago, CA?

Tide data for Port Chicago, CA is sourced from NOAA Station #9415144. View the official NOAA station page at https://tidesandcurrents.noaa.gov/stationhome.html?id=9415144.

What is the moon phase in Port Chicago, CA tonight?

Tonight the moon over Port Chicago, CA is First Quarter (66% illuminated). This places Port Chicago, 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