Tides Today & Tomorrow in Adak Island, AK

TIDE TIMES for Tuesday, August 18, 2026
The tide is currently rising in Adak Island, AK.
Next low tide (tomorrow) : 6:05 am (0.0 ft)
Next high tide : in 5h 56m at 10:00 pm (3.4 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 1927

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Fri3:392.62:262.98:421.89:220.86:527:48New Moon1Fri
2Sat3:552.84:172.710:041.110:131.46:497:50New Moon2Sat
3Sun4:193.06:162.711:170.511:072.06:477:52Waxing Crescent3Sun
4Mon4:503.38:102.912:22-0.16:457:54Waxing Crescent4Mon
5Tue5:263.59:433.212:082.51:22-0.66:437:55Waxing Crescent5Tue
6Wed6:073.610:543.41:152.92:19-0.86:407:57Waxing Crescent6Wed
7Thu6:533.611:533.52:253.13:13-0.96:387:59First Quarter7Thu
8Fri7:433.63:343.14:07-0.86:368:00First Quarter8Fri
9Sat12:453.58:35 AM3.44:403.14:58-0.66:348:02First Quarter9Sat
10Sun1:333.49:29 AM3.35:412.95:48-0.36:318:04First Quarter10Sun
11Mon2:173.210:25 AM3.06:392.86:340.06:298:05Waxing Gibbous11Mon
12Tue2:553.011:23 AM2.87:342.57:170.46:278:07Waxing Gibbous12Tue
13Wed3:242.812:302.58:282.27:550.86:258:09Waxing Gibbous13Wed
14Thu3:372.61:512.39:171.98:291.26:228:10Waxing Gibbous14Thu
15Fri3:342.53:342.110:011.68:591.66:208:12Full Moon15Fri
16Sat3:222.45:492.210:401.29:282.06:188:14Full Moon16Sat
17Sun3:122.511:170.86:168:16Full Moon17Sun
18Mon3:032.711:530.46:148:17Full Moon18Mon
19Tue2:512.912:300.16:128:19Waning Gibbous19Tue
20Wed2:393.211:463.41:07-0.26:098:21Waning Gibbous20Wed
21Thu1:47-0.46:078:22Waning Gibbous21Thu
22Fri12:293.52:28-0.66:058:24Waning Gibbous22Fri
23Sat4:343.63:11-0.76:038:26Third Quarter23Sat
24Sun5:563.63:55-0.76:018:27Third Quarter24Sun
25Mon7:173.54:39-0.65:598:29Third Quarter25Mon
26Tue1:433.18:40 AM3.34:433.05:23-0.35:578:31Waning Crescent26Tue
27Wed1:332.910:11 AM2.95:482.56:060.15:558:32Waning Crescent27Wed
28Thu1:322.811:53 AM2.66:551.96:470.65:538:34Waning Crescent28Thu
29Fri1:412.91:482.38:011.27:281.35:518:36Waning Crescent29Fri
30Sat1:583.13:582.39:050.48:101.95:498:37New Moon30Sat
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 2:02 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