Tides Today & Tomorrow in Port Graham, AK

TIDE TIMES for Wednesday, August 19, 2026
The tide is currently rising in Port Graham, AK.
Next low tide : 1:09 pm (5.4 ft)
Next high tide : in 3h 45m at 7:39 am (12.7 ft)
Sunset today : 9:46 pm
Sunrise tomorrow : 6:35 am
Moon phase : First Quarter (47% illuminated)
Tide Station Location : Station #9455437
Common Questions About Tides

Port Graham, AK Tides - Jun 1939

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Thu12:0918.51:1016.76:34-3.06:382.03:029:07Full Moon1Thu
2Fri12:4918.51:5116.97:14-3.27:192.13:019:08Full Moon2Fri
3Sat1:2818.32:3116.87:52-3.07:592.33:009:10Full Moon3Sat
4Sun2:0617.83:0916.58:29-2.48:392.82:589:12Waning Gibbous4Sun
5Mon2:4417.03:4715.99:06-1.69:203.42:579:13Waning Gibbous5Mon
6Tue3:2216.04:2615.19:44-0.510:034.12:569:15Waning Gibbous6Tue
7Wed4:0214.75:0714.410:230.810:504.72:559:16Waning Gibbous7Wed
8Thu4:4813.55:5213.811:062.111:445.22:549:17Third Quarter8Thu
9Fri5:4112.36:4013.511:533.32:539:18Third Quarter9Fri
10Sat6:4611.47:3313.512:455.212:484.32:529:20Third Quarter10Sat
11Sun8:0111.18:2613.91:534.81:494.92:529:21Third Quarter11Sun
12Mon9:1511.69:1814.72:583.72:525.12:519:22Waning Crescent12Mon
13Tue10:1812.510:0615.73:542.23:504.82:519:23Waning Crescent13Tue
14Wed11:1213.810:5216.94:420.54:424.12:509:24Waning Crescent14Wed
15Thu12:0015.15:27-1.25:303.32:509:24New Moon15Thu
16Fri12:4616.36:10-2.86:162.42:499:25New Moon16Fri
17Sat12:2419.01:3017.36:53-4.07:021.72:499:26New Moon17Sat
18Sun1:1019.72:1418.07:36-4.87:471.12:499:26New Moon18Sun
19Mon1:5619.82:5818.38:19-5.08:350.92:499:27Waxing Crescent19Mon
20Tue2:4419.53:4318.39:04-4.59:241.02:499:27Waxing Crescent20Tue
21Wed3:3418.54:3017.99:51-3.410:171.32:499:27Waxing Crescent21Wed
22Thu4:2817.15:2017.410:40-1.811:161.72:499:28First Quarter22Thu
23Fri5:2815.56:1416.811:330.02:509:28First Quarter23Fri
24Sat6:3714.07:1316.312:222.112:321.82:509:28First Quarter24Sat
25Sun7:5613.18:1516.11:342.01:383.22:519:28First Quarter25Sun
26Mon9:1713.09:1716.22:501.52:474.12:519:28Waxing Gibbous26Mon
27Tue10:2813.510:1416.53:570.63:534.32:529:27Waxing Gibbous27Tue
28Wed11:2714.311:0516.94:54-0.44:504.12:539:27Waxing Gibbous28Wed
29Thu12:1715.25:41-1.25:393.72:539:27Full Moon29Thu
30Fri1:0015.86:22-1.86:233.22:549:26Full Moon30Fri
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 10:24 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 neap phase. Tonight's moon is 47% 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 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 (47% illuminated). This places Port Graham, 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