Tides Today & Tomorrow in Petersburg, AK

TIDE TIMES for Tuesday, July 21, 2026
The tide is currently rising in Petersburg, AK.
Next low tide : 1:03 pm (3.3 ft)
Next high tide : in 4h 24m at 7:08 am (11.7 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 - Aug 1968

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Thu4:3912.44:5615.510:372.611:481.72:527:03First Quarter1Thu
2Fri5:5511.45:5615.311:364.02:547:01First Quarter2Fri
3Sat7:2611.17:0815.41:061.312:524.92:566:59Waxing Gibbous3Sat
4Sun8:5311.88:2215.82:250.62:155.12:586:57Waxing Gibbous4Sun
5Mon10:0212.99:3016.63:34-0.53:294.53:006:54Waxing Gibbous5Mon
6Tue10:5614.010:2917.54:31-1.64:303.63:026:52Full Moon6Tue
7Wed11:4215.111:2018.05:20-2.45:222.53:046:50Full Moon7Wed
8Thu12:2315.96:03-2.96:091.63:066:48Full Moon8Thu
9Fri12:0718.21:0116.46:43-2.96:531.03:086:45Full Moon9Fri
10Sat12:5117.91:3716.57:21-2.57:350.73:106:43Waning Gibbous10Sat
11Sun1:3217.12:1116.47:56-1.68:170.83:126:41Waning Gibbous11Sun
12Mon2:1215.92:4416.08:29-0.48:581.13:146:38Waning Gibbous12Mon
13Tue2:5214.53:1715.39:021.19:421.73:166:36Waning Gibbous13Tue
14Wed3:3513.03:5214.59:362.710:312.43:186:33Third Quarter14Wed
15Thu4:2511.64:3213.710:124.211:313.13:206:31Third Quarter15Thu
16Fri5:3010.45:2413.011:005.63:226:29Third Quarter16Fri
17Sat7:019.96:3712.612:463.412:126.63:246:26Third Quarter17Sat
18Sun8:3810.37:5812.92:083.11:516.93:266:24Waning Crescent18Sun
19Mon9:4311.29:0413.63:142.33:096.33:286:21Waning Crescent19Mon
20Tue10:2712.29:5514.74:051.34:025.43:306:19Waning Crescent20Tue
21Wed11:0213.310:3815.74:450.24:444.33:336:16Waning Crescent21Wed
22Thu11:3514.311:1716.55:20-0.85:213.13:356:14New Moon22Thu
23Fri12:0515.25:53-1.55:572.03:376:11New Moon23Fri
24Sat12:3516.16:24-2.06:321.13:396:08New Moon24Sat
25Sun12:3217.31:0616.76:56-2.07:090.33:416:06Waxing Crescent25Sun
26Mon1:1017.11:3717.27:28-1.57:48-0.23:436:03Waxing Crescent26Mon
27Tue1:5116.42:1117.38:02-0.68:31-0.23:456:01Waxing Crescent27Tue
28Wed2:3415.32:4717.18:380.79:180.13:475:58Waxing Crescent28Wed
29Thu3:2414.03:2916.59:182.210:140.73:495:55First Quarter29Thu
30Fri4:2512.54:2015.710:073.811:241.43:515:53First Quarter30Fri
31Sat5:4611.45:2914.911:145.33:535:50First Quarter31Sat
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 10:05 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 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