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 4h 58m 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 - May 1944

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Mon9:0711.510:3312.83:097.03:424.05:069:01First Quarter1Mon
2Tue10:2811.911:2013.74:306.04:443.65:049:04Waxing Gibbous2Tue
3Wed11:2612.911:5514.75:224.45:292.95:019:06Waxing Gibbous3Wed
4Thu12:1114.06:012.86:052.34:599:08Waxing Gibbous4Thu
5Fri12:2615.712:5115.06:341.26:391.74:569:11Waxing Gibbous5Fri
6Sat12:5616.71:2815.97:07-0.27:121.34:549:13Full Moon6Sat
7Sun1:2617.62:0516.67:40-1.57:461.14:519:16Full Moon7Sun
8Mon1:5618.22:4217.08:13-2.48:211.34:499:18Full Moon8Mon
9Tue2:2818.63:2017.08:48-2.98:571.74:469:20Full Moon9Tue
10Wed3:0218.64:0016.79:25-2.99:352.34:449:23Waning Gibbous10Wed
11Thu3:3818.24:4416.010:04-2.510:163.24:419:25Waning Gibbous11Thu
12Fri4:1817.55:3315.110:49-1.711:044.24:399:27Waning Gibbous12Fri
13Sat5:0416.46:3014.311:40-0.64:379:29Third Quarter13Sat
14Sun6:0215.17:3813.912:035.112:410.54:349:32Third Quarter14Sun
15Mon7:1514.08:5014.21:145.51:511.34:329:34Third Quarter15Mon
16Tue8:4213.59:5615.12:355.03:051.54:309:36Third Quarter16Tue
17Wed10:0614.010:5216.33:543.54:141.34:289:38Waning Crescent17Wed
18Thu11:1515.011:4117.64:591.45:120.84:269:41Waning Crescent18Thu
19Fri12:1416.25:53-0.76:030.44:249:43Waning Crescent19Fri
20Sat12:2518.71:0617.16:40-2.56:490.34:229:45New Moon20Sat
21Sun1:0719.51:5417.87:24-3.87:320.44:209:47New Moon21Sun
22Mon1:4719.82:4018.08:06-4.48:140.74:189:49New Moon22Mon
23Tue2:2719.73:2317.78:47-4.38:561.44:169:51New Moon23Tue
24Wed3:0619.14:0617.19:28-3.69:372.44:149:53Waxing Crescent24Wed
25Thu3:4418.04:5016.110:09-2.510:203.54:129:55Waxing Crescent25Thu
26Fri4:2416.65:3515.010:51-1.011:064.64:109:57Waxing Crescent26Fri
27Sat5:0715.16:2514.011:360.511:585.64:099:59Waxing Crescent27Sat
28Sun5:5513.57:2113.212:262.04:0710:01First Quarter28Sun
29Mon6:5512.28:2112.81:006.31:243.24:0510:03First Quarter29Mon
30Tue8:0911.49:2113.02:136.42:274.04:0410:05First Quarter30Tue
31Wed9:2811.310:1313.53:295.73:314.24:0210:06First Quarter31Wed
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