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 3h 36m 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 - Mar 1968

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Fri1:2216.91:2516.57:290.47:38-0.25:424:25Waxing Crescent1Fri
2Sat1:4916.81:5915.68:030.58:060.95:404:27Waxing Crescent2Sat
3Sun2:1516.32:3414.48:370.98:332.15:374:29Waxing Crescent3Sun
4Mon2:4215.73:1113.19:141.59:003.55:354:31Waxing Crescent4Mon
5Tue3:1114.93:5411.89:552.49:314.85:324:34First Quarter5Tue
6Wed3:4614.14:5210.610:483.210:116.15:294:36First Quarter6Wed
7Thu4:3413.26:249.812:043.85:274:38First Quarter7Thu
8Fri5:5212.58:1710.21:393.75:244:40First Quarter8Fri
9Sat7:3112.79:2611.31:197.42:552.75:214:42Waxing Gibbous9Sat
10Sun8:4813.710:0912.62:536.53:471.45:194:44Waxing Gibbous10Sun
11Mon9:4314.910:4414.03:505.14:280.15:164:47Waxing Gibbous11Mon
12Tue10:2916.211:1715.44:333.55:04-1.15:134:49Waxing Gibbous12Tue
13Wed11:1217.211:4916.75:131.95:39-1.85:114:51Full Moon13Wed
14Thu11:5317.95:520.36:13-2.15:084:53Full Moon14Thu
15Fri12:2117.812:3418.06:31-1.06:47-1.95:054:55Full Moon15Fri
16Sat12:5418.61:1717.67:11-1.87:23-1.15:034:57Waning Gibbous16Sat
17Sun1:2918.92:0116.77:53-2.08:000.15:004:59Waning Gibbous17Sun
18Mon2:0618.62:4815.38:38-1.78:401.64:575:01Waning Gibbous18Mon
19Tue2:4617.93:4313.79:29-0.89:263.34:545:04Third Quarter19Tue
20Wed3:3316.64:5212.210:300.410:234.94:525:06Third Quarter20Wed
21Thu4:3315.26:2511.411:481.511:476.14:495:08Third Quarter21Thu
22Fri5:5614.18:0611.71:211.84:465:10Third Quarter22Fri
23Sat7:3413.89:1712.81:356.12:431.34:445:12Waning Crescent23Sat
24Sun8:5414.410:0714.13:005.03:430.64:415:14Waning Crescent24Sun
25Mon9:5315.210:4615.13:593.64:29-0.14:385:16Waning Crescent25Mon
26Tue10:4015.911:1916.04:442.25:06-0.54:355:18Waning Crescent26Tue
27Wed11:2116.211:4916.55:231.05:39-0.54:335:20New Moon27Wed
28Thu11:5716.35:580.06:09-0.24:305:23New Moon28Thu
29Fri12:1616.912:3216.16:31-0.56:370.34:275:25New Moon29Fri
30Sat12:4216.91:0515.77:02-0.87:041.14:255:27New Moon30Sat
31Sun1:0816.81:3715.07:34-0.67:312.04:225:29Waxing Crescent31Sun
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