Tides Today & Tomorrow in Petersburg, AK

TIDE TIMES for Tuesday, July 21, 2026
The tide is currently falling in Petersburg, AK.
Next low tide : in 50m at 1:12 am (2.3 ft)
Next high tide : 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 - Jun 2072

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Wed1:4717.82:4415.48:26-2.68:281.94:069:33Full Moon1Wed
2Thu2:2617.53:2515.29:05-2.49:092.34:059:34Waning Gibbous2Thu
3Fri3:0416.94:0514.89:43-1.99:492.84:049:36Waning Gibbous3Fri
4Sat3:4216.14:4514.210:21-1.110:313.44:039:37Waning Gibbous4Sat
5Sun4:2115.15:2713.611:01-0.211:164.04:029:38Waning Gibbous5Sun
6Mon5:0214.06:1113.111:420.74:029:39Third Quarter6Mon
7Tue5:5012.97:0112.812:074.412:281.74:019:40Third Quarter7Tue
8Wed6:4611.97:5612.71:084.71:192.54:009:41Third Quarter8Wed
9Thu7:5311.28:5212.92:174.52:173.14:009:42Third Quarter9Thu
10Fri9:0611.19:4513.53:253.93:173.43:599:43Third Quarter10Fri
11Sat10:1411.410:3314.34:252.94:143.43:599:44Waning Crescent11Sat
12Sun11:1312.111:1715.25:161.65:063.33:589:45Waning Crescent12Sun
13Mon12:0513.06:010.35:532.93:589:45Waning Crescent13Mon
14Tue12:0016.112:5213.96:43-0.96:382.63:589:46New Moon14Tue
15Wed12:4217.01:3714.77:25-2.17:222.23:589:47New Moon15Wed
16Thu1:2417.72:2115.48:06-2.98:051.93:589:47New Moon16Thu
17Fri2:0718.13:0515.88:48-3.48:501.73:589:48New Moon17Fri
18Sat2:5218.23:5016.09:31-3.59:371.73:589:48Waxing Crescent18Sat
19Sun3:3817.84:3616.010:16-3.210:271.93:589:48Waxing Crescent19Sun
20Mon4:2717.05:2515.811:04-2.411:232.13:589:48Waxing Crescent20Mon
21Tue5:2115.86:1815.511:55-1.43:589:49First Quarter21Tue
22Wed6:2214.47:1515.312:262.412:50-0.23:599:49First Quarter22Wed
23Thu7:3313.38:1715.31:372.41:511.03:599:49First Quarter23Thu
24Fri8:5112.69:1915.52:522.02:561.94:009:49First Quarter24Fri
25Sat10:0912.510:1915.84:041.34:022.54:009:49Waxing Gibbous25Sat
26Sun11:1712.911:1316.35:080.35:032.74:019:48Waxing Gibbous26Sun
27Mon12:1613.56:02-0.65:582.74:029:48Waxing Gibbous27Mon
28Tue12:0216.71:0614.16:49-1.36:472.74:029:48Full Moon28Tue
29Wed12:4716.91:5014.67:32-1.87:312.64:039:47Full Moon29Wed
30Thu1:2917.02:3114.88:11-2.08:122.54:049:47Full Moon30Thu
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 4:10 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