Tides Today & Tomorrow in Adak Island, AK

TIDE TIMES for Tuesday, August 18, 2026
The tide is currently falling in Adak Island, AK.
Next low tide : in 1h 30m at 5:18 am (0.4 ft)
Next high tide : 12:42 pm (2.5 ft)
Sunset today : 9:03 pm
Sunrise tomorrow : 6:36 am
Moon phase : First Quarter (39% illuminated)
Tide Station Location : Station #9461380
Common Questions About Tides

Adak Island, AK Tides - Jun 1928

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Fri12:163.411:523.69:48-0.25:029:26Full Moon1Fri
2Sat11:373.810:19-0.45:019:27Full Moon2Sat
3Sun11:364.010:52-0.65:019:28Full Moon3Sun
4Mon11:404.111:26-0.85:009:29Full Moon4Mon
5Tue11:434.112:02-0.94:599:30Waning Gibbous5Tue
6Wed11:494.112:39-0.94:599:31Waning Gibbous6Wed
7Thu11:563.91:15-0.94:589:31Waning Gibbous7Thu
8Fri11:573.71:51-0.84:589:32Waning Gibbous8Fri
9Sat11:473.52:25-0.64:579:33Third Quarter9Sat
10Sun11:293.32:57-0.34:579:34Third Quarter10Sun
11Mon11:173.33:240.24:579:35Third Quarter11Mon
12Tue9:301.911:153.46:071.73:440.84:569:35Third Quarter12Tue
13Wed12:161.76:410.93:431.54:569:36Waning Crescent13Wed
14Thu11:364.17:240.14:569:36Waning Crescent14Thu
15Fri8:11-0.74:569:37Waning Crescent15Fri
16Sat12:004.59:01-1.24:569:37New Moon16Sat
17Sun12:314.79:53-1.64:569:38New Moon17Sun
18Mon1:104.710:46-1.84:569:38New Moon18Mon
19Tue1:574.611:38-1.84:569:39Waxing Crescent19Tue
20Wed2:524.310:073.912:29-1.64:569:39Waxing Crescent20Wed
21Thu3:553.810:163.81:153.81:17-1.34:569:39Waxing Crescent21Thu
22Fri5:093.310:333.72:593.32:02-0.94:579:39Waxing Crescent22Fri
23Sat6:332.810:513.64:172.72:43-0.44:579:39First Quarter23Sat
24Sun8:112.211:063.55:182.13:190.24:579:39First Quarter24Sun
25Mon10:051.811:163.46:091.53:460.94:589:39First Quarter25Mon
26Tue12:331.76:520.93:571.54:589:39First Quarter26Tue
27Wed11:193.57:310.44:599:39Waxing Gibbous27Wed
28Thu11:143.78:060.04:599:39Waxing Gibbous28Thu
29Fri11:063.98:39-0.35:009:39Waxing Gibbous29Fri
30Sat11:054.19:12-0.55:009:39Waxing Gibbous30Sat
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (9461380)

Common Questions About Adak Island, AK Tides

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What time does the tide turn (slack tide) in Adak Island, AK today?

Slack tide in Adak Island, AK is approximately 9:00 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 Adak Island, AK?

Adak Island, AK is currently in a transitional phase. Tonight's moon is 39% 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 Adak Island, 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 Adak Island, AK?

Tide predictions for Adak Island, 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 Adak Island, AK?

Tide data for Adak Island, AK is sourced from NOAA Station #9461380. View the official NOAA station page at https://tidesandcurrents.noaa.gov/stationhome.html?id=9461380.

What is the moon phase in Adak Island, AK tonight?

Tonight the moon over Adak Island, AK is First Quarter (39% illuminated). This places Adak Island, 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