Tides Today & Tomorrow in Petersburg, AK

TIDE TIMES for Tuesday, July 21, 2026
The tide is currently rising in Petersburg, AK.
Next low tide (tomorrow) : 2:19 am (2.6 ft)
Next high tide : in 4h 54m at 7:22 pm (14.3 ft)
Sunset today : 9:24 pm
Sunrise tomorrow : 4:32 am
Moon phase : First Quarter (54% illuminated)
Tide Station Location : Station #9451439
Common Questions About Tides

Petersburg, AK Tides - Apr 1968

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Mon1:3316.42:1114.18:06-0.27:583.04:195:31Waxing Crescent1Mon
2Tue1:5915.72:4713.18:400.58:264.14:165:33Waxing Crescent2Tue
3Wed2:2914.93:2912.09:191.58:595.14:145:35Waxing Crescent3Wed
4Thu3:0414.04:2510.910:082.49:416.14:115:37First Quarter4Thu
5Fri3:5213.05:4710.211:163.110:526.94:085:39First Quarter5Fri
6Sat5:0812.27:2510.512:443.24:065:42First Quarter6Sat
7Sun6:4812.28:3411.612:477.02:022.54:035:44First Quarter7Sun
8Mon8:1013.09:2013.02:205.92:591.54:005:46Waxing Gibbous8Mon
9Tue9:1114.29:5814.53:194.13:440.43:585:48Waxing Gibbous9Tue
10Wed10:0215.410:3316.14:052.24:24-0.43:555:50Waxing Gibbous10Wed
11Thu10:4916.411:0817.54:470.25:02-0.93:525:52Full Moon11Thu
12Fri11:3417.111:4418.75:28-1.55:40-0.93:505:54Full Moon12Fri
13Sat12:1917.36:10-2.86:18-0.63:475:56Full Moon13Sat
14Sun12:2019.31:0517.06:52-3.56:570.23:455:58Waning Gibbous14Sun
15Mon12:5919.41:5216.27:36-3.47:391.33:426:01Waning Gibbous15Mon
16Tue1:4018.82:4215.08:23-2.88:242.63:396:03Waning Gibbous16Tue
17Wed2:2517.73:4013.79:16-1.69:164.03:376:05Waning Gibbous17Wed
18Thu3:1716.24:4912.610:17-0.210:225.23:346:07Third Quarter18Thu
19Fri4:2214.66:1412.111:321.011:525.73:326:09Third Quarter19Fri
20Sat5:4713.47:3812.512:561.63:296:11Third Quarter20Sat
21Sun7:1913.08:4213.31:295.32:111.53:276:13Waning Crescent21Sun
22Mon8:3513.39:3014.32:454.03:081.23:246:15Waning Crescent22Mon
23Tue9:3313.910:0815.23:402.63:531.13:226:17Waning Crescent23Tue
24Wed10:2014.310:4015.84:231.34:311.03:196:20Waning Crescent24Wed
25Thu11:0114.611:1016.35:000.25:041.23:176:22New Moon25Thu
26Fri11:3814.811:3716.55:34-0.65:341.63:146:24New Moon26Fri
27Sat12:1314.86:06-1.16:042.03:126:26New Moon27Sat
28Sun12:0416.612:4714.66:38-1.36:332.63:096:28New Moon28Sun
29Mon12:3116.41:2114.37:09-1.17:023.23:076:30Waxing Crescent29Mon
30Tue1:0016.11:5613.77:42-0.77:323.93:056:32Waxing Crescent30Tue
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (9451439)

Common Questions About Petersburg, AK Tides

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What time does the tide turn (slack tide) in Petersburg, AK today?

Slack tide in Petersburg, AK is approximately 10:50 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 Petersburg, AK?

Petersburg, AK is currently in a neap phase. Tonight's moon is 54% 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 Petersburg, AK 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 Petersburg, AK?

Tide predictions for Petersburg, AK 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 Petersburg, AK?

Tide data for Petersburg, AK is sourced from NOAA Station #9451439. View the official NOAA station page at https://tidesandcurrents.noaa.gov/stationhome.html?id=9451439.

What is the moon phase in Petersburg, AK tonight?

Tonight the moon over Petersburg, AK is First Quarter (54% illuminated). This places Petersburg, AK 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