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 0m 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 - Apr 1928

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sun3:333.011:55 AM3.17:222.77:570.16:507:50Waxing Gibbous1Sun
2Mon4:022.81:052.88:322.48:410.66:487:51Waxing Gibbous2Mon
3Tue4:212.62:272.59:392.09:231.06:457:53Full Moon3Tue
4Wed4:282.54:092.310:371.610:021.56:437:55Full Moon4Wed
5Thu4:242.56:112.311:231.210:422.06:417:56Full Moon5Thu
6Fri4:172.58:112.512:020.86:397:58Full Moon6Fri
7Sat4:122.79:452.812:390.56:368:00Waning Gibbous7Sat
8Sun4:052.910:533.112:252.81:150.26:348:02Waning Gibbous8Sun
9Mon3:573.111:483.31:353.01:540.06:328:03Waning Gibbous9Mon
10Tue2:33-0.26:308:05Waning Gibbous10Tue
11Wed12:403.43:15-0.36:278:07Third Quarter11Wed
12Thu5:273.53:57-0.46:258:08Third Quarter12Thu
13Fri6:353.54:39-0.46:238:10Third Quarter13Fri
14Sat7:433.45:20-0.36:218:12Third Quarter14Sat
15Sun8:533.36:00-0.26:198:13Waning Crescent15Sun
16Mon2:522.810:12 AM3.15:382.76:390.16:168:15Waning Crescent16Mon
17Tue2:272.611:46 AM2.76:522.27:170.66:148:17Waning Crescent17Tue
18Wed2:192.61:392.48:051.57:541.26:128:18New Moon18Wed
19Thu2:252.83:482.39:130.88:311.86:108:20New Moon19Thu
20Fri2:413.16:192.510:170.19:112.46:088:22New Moon20Fri
21Sat3:053.411:18-0.66:068:24Waxing Crescent21Sat
22Sun3:383.712:16-1.16:048:25Waxing Crescent22Sun
23Mon4:213.910:413.71:12-1.46:028:27Waxing Crescent23Mon
24Tue5:123.911:203.71:073.62:08-1.46:008:29Waxing Crescent24Tue
25Wed6:123.811:573.72:323.53:02-1.35:588:30First Quarter25Wed
26Thu7:183.63:473.33:56-1.15:558:32First Quarter26Thu
27Fri12:333.68:28 AM3.34:563.04:47-0.75:538:34First Quarter27Fri
28Sat1:063.49:41 AM2.96:032.65:35-0.25:528:35Waxing Gibbous28Sat
29Sun1:363.211:00 AM2.67:062.26:180.35:508:37Waxing Gibbous29Sun
30Mon1:583.012:302.28:061.86:560.85:488:39Waxing Gibbous30Mon
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