Tides Today & Tomorrow in Napa, CA

TIDE TIMES for Tuesday, July 21, 2026
The tide is currently falling in Napa, CA.
Next low tide : in 5h 17m at 1:51 pm (1.9 ft)
Next high tide : 8:12 pm (7.1 ft)
Sunset today : 8:28 pm
Sunrise tomorrow : 6:02 am
Moon phase : First Quarter (53% illuminated)
Tide Station Location : Station #9415623
Common Questions About Tides

Napa, CA Tides - Apr 2072

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Fri1:086.81:057.07:180.67:35-0.16:527:33Full Moon1Fri
2Sat1:467.22:006.98:060.18:180.16:507:34Full Moon2Sat
3Sun2:247.42:546.78:54-0.29:010.56:497:35Full Moon3Sun
4Mon3:017.53:486.49:41-0.49:450.96:477:36Waning Gibbous4Mon
5Tue3:407.44:446.110:29-0.410:301.46:457:36Waning Gibbous5Tue
6Wed4:197.25:425.711:18-0.311:191.86:447:37Waning Gibbous6Wed
7Thu5:026.86:475.412:10-0.16:437:38Waning Gibbous7Thu
8Fri5:486.47:595.212:172.21:080.16:417:39Third Quarter8Fri
9Sat6:436.09:145.21:292.42:120.36:407:40Third Quarter9Sat
10Sun7:475.610:175.42:502.53:180.46:387:41Third Quarter10Sun
11Mon8:575.511:065.64:042.34:180.56:377:42Third Quarter11Mon
12Tue10:055.411:435.85:032.05:090.56:357:43Waning Crescent12Tue
13Wed11:045.55:511.75:530.56:347:44Waning Crescent13Wed
14Thu12:145.911:56 AM5.66:321.46:310.66:327:45Waning Crescent14Thu
15Fri12:426.112:435.77:091.07:050.76:317:46Waning Crescent15Fri
16Sat1:086.31:275.87:420.77:370.96:307:47New Moon16Sat
17Sun1:356.52:105.88:150.48:091.16:287:48New Moon17Sun
18Mon2:036.72:545.78:470.18:421.36:277:49New Moon18Mon
19Tue2:336.93:395.79:21-0.19:171.56:257:50New Moon19Tue
20Wed3:046.94:275.69:59-0.39:541.86:247:51Waxing Crescent20Wed
21Thu3:397.05:205.410:41-0.410:372.16:237:52Waxing Crescent21Thu
22Fri4:196.96:185.311:28-0.511:282.36:217:52Waxing Crescent22Fri
23Sat5:056.77:235.312:23-0.46:207:53Waxing Crescent23Sat
24Sun6:026.48:295.412:332.51:24-0.36:197:54First Quarter24Sun
25Mon7:106.19:315.71:542.52:30-0.26:187:55First Quarter25Mon
26Tue8:285.910:246.13:172.23:36-0.16:167:56First Quarter26Tue
27Wed9:465.911:106.54:291.74:360.06:157:57Waxing Gibbous27Wed
28Thu10:595.911:526.95:281.15:300.16:147:58Waxing Gibbous28Thu
29Fri12:046.06:210.56:190.46:137:59Waxing Gibbous29Fri
30Sat12:317.31:056.17:100.07:050.66:118:00Full Moon30Sat
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (9415623)

Common Questions About Napa, CA Tides

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

Slack tide in Napa, CA is approximately 5:01 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 Napa, CA?

Napa, CA is currently in a neap phase. Tonight's moon is 53% 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 minimum.

What datum are Napa, 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 Napa, CA?

Tide predictions for Napa, 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 Napa, CA?

Tide data for Napa, CA is sourced from NOAA Station #9415623. View the official NOAA station page at https://tidesandcurrents.noaa.gov/stationhome.html?id=9415623.

What is the moon phase in Napa, CA tonight?

Tonight the moon over Napa, CA is First Quarter (53% illuminated). This places Napa, CA in a neap tide cycle, so tidal ranges are near their weekly minimum 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