Tides Today & Tomorrow in Port San Luis, CA

TIDE TIMES for Monday, August 10, 2026
The tide is currently rising in Port San Luis, CA.
Next low tide : 2:22 pm (2.5 ft)
Next high tide : in 5h 26m at 10:00 am (3.9 ft)
Sunset today : 7:57 pm
Sunrise tomorrow : 6:19 am
Moon phase : Waning Crescent (5% illuminated)
Tide Station Location : Station #9412110
Common Questions About Tides

Port San Luis, CA Tides - May 1954

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sat9:514.29:256.23:38-0.73:111.16:117:48New Moon1Sat
2Sun10:484.110:056.54:27-1.23:511.56:107:49New Moon2Sun
3Mon11:483.910:476.55:18-1.54:351.86:097:49New Moon3Mon
4Tue12:493.86:10-1.65:222.16:087:50Waxing Crescent4Tue
5Wed1:533.77:04-1.46:162.46:077:51Waxing Crescent5Wed
6Thu12:245.93:023.78:00-1.17:182.66:067:52Waxing Crescent6Thu
7Fri1:195.34:133.78:59-0.78:372.76:057:53Waxing Crescent7Fri
8Sat2:224.85:163.910:01-0.410:152.66:047:54First Quarter8Sat
9Sun3:394.26:074.111:010.011:442.36:037:54First Quarter9Sun
10Mon5:013.96:484.411:530.46:037:55First Quarter10Mon
11Tue6:173.67:224.612:541.812:390.76:027:56Waxing Gibbous11Tue
12Wed7:263.57:514.81:481.31:181.16:017:57Waxing Gibbous12Wed
13Thu8:253.58:175.02:320.81:511.46:007:58Waxing Gibbous13Thu
14Fri9:163.58:425.23:100.42:201.75:597:58Waxing Gibbous14Fri
15Sat10:013.59:065.43:450.02:482.05:587:59Waxing Gibbous15Sat
16Sun10:443.49:325.54:19-0.33:152.25:588:00Full Moon16Sun
17Mon11:283.410:005.54:54-0.43:432.45:578:01Full Moon17Mon
18Tue12:133.45:30-0.64:142.55:568:01Full Moon18Tue
19Wed1:003.46:08-0.64:472.75:568:02Full Moon19Wed
20Thu1:493.36:49-0.65:262.85:558:03Waning Gibbous20Thu
21Fri2:423.47:30-0.66:152.95:548:04Waning Gibbous21Fri
22Sat12:235.13:373.58:15-0.47:173.05:548:04Waning Gibbous22Sat
23Sun1:134.84:263.79:02-0.28:422.95:538:05Third Quarter23Sun
24Mon2:154.45:064.09:520.010:232.65:538:06Third Quarter24Mon
25Tue3:353.95:424.410:420.311:472.05:528:07Third Quarter25Tue
26Wed5:053.66:184.911:290.65:528:07Third Quarter26Wed
27Thu6:313.56:555.412:541.212:151.05:518:08Waning Crescent27Thu
28Fri7:503.57:345.91:520.31:011.35:518:09Waning Crescent28Fri
29Sat8:583.68:156.42:44-0.41:481.75:508:09Waning Crescent29Sat
30Sun9:593.78:586.63:33-1.12:361.95:508:10New Moon30Sun
31Mon10:573.89:426.74:22-1.53:242.15:498:11New Moon31Mon
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (9412110)

Common Questions About Port San Luis, CA Tides

Show All
What time does the tide turn (slack tide) in Port San Luis, CA today?

Slack tide in Port San Luis, CA is approximately 12:11 pm — 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 San Luis, CA?

Port San Luis, CA is currently in a spring phase. Tonight's moon is 5% 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 maximum.

What datum are Port San Luis, 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 San Luis, CA?

Tide predictions for Port San Luis, 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 San Luis, CA?

Tide data for Port San Luis, CA is sourced from NOAA Station #9412110. View the official NOAA station page at https://tidesandcurrents.noaa.gov/stationhome.html?id=9412110.

What is the moon phase in Port San Luis, CA tonight?

Tonight the moon over Port San Luis, CA is Waning Crescent (5% illuminated). This places Port San Luis, CA in a spring tide cycle, so tidal ranges are near their weekly maximum 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