Tides Today & Tomorrow in Port Graham, AK

TIDE TIMES for Friday, August 21, 2026
The tide is currently rising in Port Graham, AK.
Next low tide (tomorrow) : 5:16 am (4.6 ft)
Next high tide : in 3h 32m at 9:29 pm (12.6 ft)
Sunset today : 9:40 pm
Sunrise tomorrow : 6:39 am
Moon phase : First Quarter (66% illuminated)
Tide Station Location : Station #9455437
Common Questions About Tides

Port Graham, AK Tides - Jan 1936

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Wed6:0317.46:3413.912:192.89:043:17First Quarter1Wed
2Thu7:0017.07:5913.112:223.71:332.79:033:18First Quarter2Thu
3Fri8:0416.99:2813.31:305.22:512.09:033:20Waxing Gibbous3Fri
4Sat9:1217.110:4314.22:466.04:030.89:023:21Waxing Gibbous4Sat
5Sun10:1617.611:4315.43:596.05:02-0.49:013:23Waxing Gibbous5Sun
6Mon11:1318.35:015.35:51-1.59:013:25Full Moon6Mon
7Tue12:3216.512:0418.85:534.56:34-2.39:003:26Full Moon7Tue
8Wed1:1417.412:4919.26:393.67:14-2.78:593:28Full Moon8Wed
9Thu1:5217.91:3119.27:212.97:50-2.78:583:30Full Moon9Thu
10Fri2:2818.22:0918.98:002.58:25-2.28:573:32Waning Gibbous10Fri
11Sat3:0118.12:4618.18:382.48:58-1.38:563:34Waning Gibbous11Sat
12Sun3:3317.73:2317.19:162.79:31-0.18:543:36Waning Gibbous12Sun
13Mon4:0417.24:0015.79:553.110:041.48:533:38Waning Gibbous13Mon
14Tue4:3516.54:4114.210:363.810:383.18:523:40Third Quarter14Tue
15Wed5:0815.75:2912.711:214.511:164.88:503:42Third Quarter15Wed
16Thu5:4615.06:3011.512:155.08:493:44Third Quarter16Thu
17Fri6:3214.57:5510.812:026.41:245.28:473:46Third Quarter17Fri
18Sat7:3214.29:3111.11:057.72:464.78:463:49Waning Crescent18Sat
19Sun8:4214.410:4412.32:278.33:583.58:443:51Waning Crescent19Sun
20Mon9:5015.311:3413.73:447.94:511.88:433:53Waning Crescent20Mon
21Tue10:4716.54:456.75:350.08:413:55Waning Crescent21Tue
22Wed12:1615.311:38 AM18.05:345.26:14-1.78:393:58New Moon22Wed
23Thu12:5416.812:2519.26:193.66:53-3.18:374:00New Moon23Thu
24Fri1:3018.11:0920.27:022.07:30-4.08:354:03New Moon24Fri
25Sat2:0619.21:5320.67:440.78:08-4.28:334:05New Moon25Sat
26Sun2:4219.92:3820.38:27-0.28:47-3.68:314:07Waxing Crescent26Sun
27Mon3:1920.23:2319.39:11-0.69:27-2.38:294:10Waxing Crescent27Mon
28Tue3:5719.94:1217.79:58-0.310:09-0.38:274:12Waxing Crescent28Tue
29Wed4:3819.35:0615.810:500.410:551.98:254:15First Quarter29Wed
30Thu5:2418.26:1213.911:491.411:494.38:234:17First Quarter30Thu
31Fri6:1917.07:3712.51:012.38:214:20First Quarter31Fri
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 1:22 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 Port Graham, AK?

Port Graham, AK is currently in a transitional phase. Tonight's moon is 66% 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 shifting between spring and neap.

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 First Quarter (66% illuminated). This places Port Graham, AK in a transitional tide cycle, so tidal ranges are shifting between spring and neap 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