Tides Today & Tomorrow in Port Graham, AK

TIDE TIMES for Sunday, August 16, 2026
The tide is currently rising in Port Graham, AK.
Next low tide : 11:45 pm (-0.3 ft)
Next high tide : in 1h 34m at 5:41 pm (18.7 ft)
Sunset today : 9:54 pm
Sunrise tomorrow : 6:28 am
Moon phase : Waxing Crescent (20% illuminated)
Tide Station Location : Station #9455437
Common Questions About Tides

Port Graham, AK Tides - Jan 1944

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sat6:2017.86:1716.312:093.210:034:17First Quarter1Sat
2Sun7:1617.17:2714.712:310.61:173.610:034:18First Quarter2Sun
3Mon8:1716.78:5013.61:312.42:323.510:034:20First Quarter3Mon
4Tue9:2116.610:1513.52:383.93:502.810:024:21Waxing Gibbous4Tue
5Wed10:2216.811:2814.13:494.84:581.710:014:23Waxing Gibbous5Wed
6Thu11:1717.24:555.15:540.510:014:25Waxing Gibbous6Thu
7Fri12:2715.012:0617.75:514.96:39-0.510:004:26Waxing Gibbous7Fri
8Sat1:1515.912:5018.16:394.67:19-1.29:594:28Full Moon8Sat
9Sun1:5716.61:3018.47:214.27:56-1.69:584:30Full Moon9Sun
10Mon2:3417.02:0718.58:003.88:31-1.89:574:32Full Moon10Mon
11Tue3:0917.32:4318.48:373.69:04-1.79:564:34Full Moon11Tue
12Wed3:4217.33:1818.09:133.59:37-1.39:544:36Waning Gibbous12Wed
13Thu4:1517.03:5317.49:493.710:11-0.59:534:38Waning Gibbous13Thu
14Fri4:4716.64:2916.410:274.010:450.59:524:40Waning Gibbous14Fri
15Sat5:2116.05:0815.211:064.511:201.79:504:42Waning Gibbous15Sat
16Sun5:5615.55:5113.911:505.011:593.19:494:44Third Quarter16Sun
17Mon6:3514.96:4512.712:415.49:474:46Third Quarter17Mon
18Tue7:2014.67:5511.812:434.51:425.49:464:49Third Quarter18Tue
19Wed8:1414.69:2011.61:405.72:554.99:444:51Third Quarter19Wed
20Thu9:1614.910:4212.42:496.54:083.79:424:53Waning Crescent20Thu
21Fri10:1915.811:4713.84:036.55:101.99:414:56Waning Crescent21Fri
22Sat11:1717.15:085.96:02-0.19:394:58Waning Crescent22Sat
23Sun12:4115.412:1118.56:054.76:49-2.09:375:00Waning Crescent23Sun
24Mon1:2817.01:0319.96:553.37:34-3.79:355:03New Moon24Mon
25Tue2:1318.41:5221.07:431.98:18-4.89:335:05New Moon25Tue
26Wed2:5519.52:4021.58:300.89:01-5.29:315:08New Moon26Wed
27Thu3:3820.13:2721.39:160.19:44-4.89:295:10Waxing Crescent27Thu
28Fri4:2020.24:1520.410:03-0.110:27-3.69:275:12Waxing Crescent28Fri
29Sat5:0319.85:0518.810:530.311:13-1.79:255:15Waxing Crescent29Sat
30Sun5:4819.06:0016.811:461.09:235:17First Quarter30Sun
31Mon6:3617.97:0214.712:010.512:452.09:215:20First Quarter31Mon
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (9455437)

Common Questions About Port Graham, AK Tides

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

Slack tide in Port Graham, AK is approximately 8:43 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 Port Graham, AK?

Port Graham, AK is currently in a spring phase. Tonight's moon is 20% 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 maximum.

What datum are Port Graham, 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 Port Graham, AK?

Tide predictions for Port Graham, 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 Port Graham, AK?

Tide data for Port Graham, AK is sourced from NOAA Station #9455437. View the official NOAA station page at https://tidesandcurrents.noaa.gov/stationhome.html?id=9455437.

What is the moon phase in Port Graham, AK tonight?

Tonight the moon over Port Graham, AK is Waxing Crescent (20% illuminated). This places Port Graham, AK in a spring tide cycle, so tidal ranges are near their weekly maximum 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