Tides Today & Tomorrow in Port San Luis, CA

TIDE TIMES for Saturday, July 25, 2026
The tide is currently falling in Port San Luis, CA.
Next low tide (tomorrow) : in 7h 29m at 3:36 am (-0.2 ft)
Next high tide (tomorrow) : 10:32 am (3.6 ft)
Sunset today : 11:18 pm
Sunrise tomorrow : 9:14 am
Moon phase : Waxing Gibbous (86% illuminated)
Tide Station Location : Station #9412110
Common Questions About Tides

Port San Luis, CA Tides - Dec 1985

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sun1:533.610:57 AM5.44:433.47:02-0.29:597:58Waning Gibbous1Sun
2Mon3:003.711:43 AM5.15:413.57:510.010:007:57Waning Gibbous2Mon
3Tue3:523.812:404.77:073.58:430.110:017:57Third Quarter3Tue
4Wed4:274.11:564.39:013.39:340.310:027:57Third Quarter4Wed
5Thu4:564.43:284.010:322.810:210.610:037:57Third Quarter5Thu
6Fri5:244.94:563.811:392.011:050.910:047:57Third Quarter6Fri
7Sat5:545.46:163.712:351.110:057:57Waning Crescent7Sat
8Sun6:275.97:283.81:260.210:057:57Waning Crescent8Sun
9Mon7:036.48:323.912:311.62:14-0.610:067:58Waning Crescent9Mon
10Tue7:416.89:313.91:152.03:02-1.210:077:58New Moon10Tue
11Wed8:227.010:304.01:592.33:50-1.610:087:58New Moon11Wed
12Thu9:057.011:274.02:462.54:40-1.710:087:58New Moon12Thu
13Fri9:526.83:362.75:30-1.610:097:58Waxing Crescent13Fri
14Sat12:244.010:41 AM6.44:322.96:20-1.310:107:59Waxing Crescent14Sat
15Sun1:214.011:33 AM5.85:343.07:11-0.910:107:59Waxing Crescent15Sun
16Mon2:204.112:305.26:463.08:02-0.410:117:59Waxing Crescent16Mon
17Tue3:174.21:344.58:142.98:540.110:128:00First Quarter17Tue
18Wed4:074.42:533.99:522.69:450.610:128:00First Quarter18Wed
19Thu4:504.74:213.511:152.110:311.110:138:00First Quarter19Thu
20Fri5:264.95:473.212:191.510:138:01First Quarter20Fri
21Sat5:595.17:063.21:091.010:148:01Waxing Gibbous21Sat
22Sun6:295.38:083.31:500.510:148:02Waxing Gibbous22Sun
23Mon6:575.58:583.412:282.32:250.110:158:02Waxing Gibbous23Mon
24Tue7:265.79:423.51:032.62:58-0.310:158:03Waxing Gibbous24Tue
25Wed7:565.810:243.61:372.83:32-0.510:168:04Full Moon25Wed
26Thu8:275.911:043.62:112.94:06-0.610:168:04Full Moon26Thu
27Fri9:005.911:433.62:462.94:42-0.710:168:05Full Moon27Fri
28Sat9:345.83:242.95:18-0.810:178:06Full Moon28Sat
29Sun12:223.610:11 AM5.74:053.05:55-0.710:178:06Waning Gibbous29Sun
30Mon1:033.710:51 AM5.54:543.06:32-0.610:178:07Waning Gibbous30Mon
31Tue1:443.811:36 AM5.15:513.07:08-0.310:178:08Waning Gibbous31Tue
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 7:04 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 spring phase. Tonight's moon is 86% 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 Waxing Gibbous (86% 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