Tides Today & Tomorrow in Port San Luis, CA

TIDE TIMES for Thursday, July 23, 2026
The tide is currently rising in Port San Luis, CA.
Next low tide : 11:30 am (2.8 ft)
Next high tide : in 4h 15m at 8:23 am (3.1 ft)
Sunset today : 8:13 pm
Sunrise tomorrow : 6:05 am
Moon phase : Waxing Gibbous (72% illuminated)
Tide Station Location : Station #9412110
Common Questions About Tides

Port San Luis, CA Tides - May 1982

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sat5:124.57:244.312:26-0.46:117:48First Quarter1Sat
2Sun6:294.48:024.612:582.01:18-0.26:107:49Waxing Gibbous2Sun
3Mon7:364.38:354.91:571.42:030.16:097:50Waxing Gibbous3Mon
4Tue8:334.29:045.12:460.92:400.46:087:51Waxing Gibbous4Tue
5Wed9:234.19:315.33:280.43:130.86:077:51Waxing Gibbous5Wed
6Thu10:094.09:575.34:070.13:431.26:067:52Full Moon6Thu
7Fri10:543.910:225.44:45-0.14:101.56:057:53Full Moon7Fri
8Sat11:403.710:475.35:22-0.34:371.96:047:54Full Moon8Sat
9Sun12:283.65:59-0.35:052.26:037:55Full Moon9Sun
10Mon1:193.46:38-0.35:342.56:027:55Waning Gibbous10Mon
11Tue2:183.37:19-0.26:072.86:027:56Waning Gibbous11Tue
12Wed12:164.83:303.38:05-0.16:473.06:017:57Waning Gibbous12Wed
13Thu12:544.64:493.38:570.17:463.26:007:58Waning Gibbous13Thu
14Fri1:424.35:483.59:560.29:343.25:597:59Third Quarter14Fri
15Sat2:504.06:273.710:540.311:202.95:587:59Third Quarter15Sat
16Sun4:173.86:574.011:440.35:588:00Third Quarter16Sun
17Mon5:373.87:234.312:282.512:290.45:578:01Third Quarter17Mon
18Tue6:463.87:494.71:211.91:090.55:568:02Waning Crescent18Tue
19Wed7:493.98:175.22:071.21:480.75:558:02Waning Crescent19Wed
20Thu8:474.08:475.62:500.52:250.95:558:03Waning Crescent20Thu
21Fri9:424.09:216.03:34-0.23:031.25:548:04New Moon21Fri
22Sat10:374.09:576.34:20-0.83:431.55:548:05New Moon22Sat
23Sun11:364.010:386.45:08-1.24:251.85:538:05New Moon23Sun
24Mon12:373.95:59-1.55:122.25:538:06Waxing Crescent24Mon
25Tue1:403.96:52-1.56:062.45:528:07Waxing Crescent25Tue
26Wed12:126.12:483.97:47-1.47:092.75:528:08Waxing Crescent26Wed
27Thu1:085.73:584.08:45-1.18:272.85:518:08Waxing Crescent27Thu
28Fri2:115.15:014.29:47-0.710:032.75:518:09First Quarter28Fri
29Sat3:274.65:554.510:48-0.411:342.35:508:10First Quarter29Sat
30Sun4:504.16:414.711:440.05:508:10First Quarter30Sun
31Mon6:103.87:215.012:481.712:340.45:498:11Waxing Gibbous31Mon
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (9412110)

Common Questions About Port San Luis, CA Tides

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

Slack tide in Port San Luis, CA is approximately 9:56 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 San Luis, CA?

Port San Luis, CA is currently in a transitional phase. Tonight's moon is 72% 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 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 Waxing Gibbous (72% illuminated). This places Port San Luis, 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