Tides Today & Tomorrow in Port Graham, AK

TIDE TIMES for Monday, August 17, 2026
The tide is currently falling in Port Graham, AK.
Next low tide : in 1h 46m at 11:52 am (0.9 ft)
Next high tide : 6:14 pm (17.6 ft)
Sunset today : 9:51 pm
Sunrise tomorrow : 6:30 am
Moon phase : Waxing Crescent (28% illuminated)
Tide Station Location : Station #9455437
Common Questions About Tides

Port Graham, AK Tides - Jun 1942

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Mon3:1220.74:1618.69:36-5.59:510.84:0210:07Waning Gibbous1Mon
2Tue4:0119.75:0717.910:25-4.410:431.64:0010:09Waning Gibbous2Tue
3Wed4:5218.36:0117.011:16-2.911:402.63:5910:10Waning Gibbous3Wed
4Thu5:4916.56:5916.112:11-1.13:5810:12Third Quarter4Thu
5Fri6:5314.78:0215.412:443.41:110.73:5710:13Third Quarter5Fri
6Sat8:0813.39:0615.11:573.82:172.23:5610:15Third Quarter6Sat
7Sun9:2812.710:0615.23:153.53:253.13:5510:16Waning Crescent7Sun
8Mon10:4312.810:5815.64:262.64:273.63:5410:18Waning Crescent8Mon
9Tue11:4413.311:4216.05:221.55:203.73:5310:19Waning Crescent9Tue
10Wed12:3314.06:070.56:053.63:5210:20Waning Crescent10Wed
11Thu12:2016.41:1614.76:46-0.46:453.53:5210:21New Moon11Thu
12Fri12:5616.81:5415.37:21-1.27:223.33:5110:22New Moon12Fri
13Sat1:3117.12:3115.77:55-1.77:593.13:5010:23New Moon13Sat
14Sun2:0517.33:0616.08:29-2.08:353.13:5010:24New Moon14Sun
15Mon2:3917.23:4116.09:03-2.09:113.33:5010:25New Moon15Mon
16Tue3:1417.04:1715.89:37-1.79:493.63:4910:25Waxing Crescent16Tue
17Wed3:5016.44:5315.410:13-1.110:284.03:4910:26Waxing Crescent17Wed
18Thu4:2815.65:3214.910:50-0.411:114.43:4910:26Waxing Crescent18Thu
19Fri5:1014.66:1414.511:310.63:4910:27Waxing Crescent19Fri
20Sat5:5913.67:0114.312:004.812:161.63:4910:27First Quarter20Sat
21Sun6:5912.77:5314.412:574.81:102.53:4910:27First Quarter21Sun
22Mon8:1212.28:5014.92:044.42:113.23:5010:28First Quarter22Mon
23Tue9:3112.49:4815.83:143.33:183.53:5010:28Waxing Gibbous23Tue
24Wed10:4413.410:4416.94:201.64:233.43:5010:28Waxing Gibbous24Wed
25Thu11:4814.711:3818.25:19-0.45:232.83:5110:28Waxing Gibbous25Thu
26Fri12:4516.16:12-2.36:182.03:5110:28Waxing Gibbous26Fri
27Sat12:3019.41:3817.47:02-4.07:101.23:5210:27Full Moon27Sat
28Sun1:2120.32:2818.47:50-5.28:000.53:5310:27Full Moon28Sun
29Mon2:1120.83:1519.08:36-5.78:490.23:5410:27Full Moon29Mon
30Tue3:0020.74:0219.09:22-5.59:380.33:5510:26Waning Gibbous30Tue
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 3:03 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 transitional phase. Tonight's moon is 28% 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 Waxing Crescent (28% 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