Chowiet Island, Semidi Island, AK Tide Chart & Tide Times

NOAA tide station 9458519 · Alaska · updated Oct 23, 2026

Sat, Oct 24: High tide 11:32 AM (9.4 ft); low tide 5:25 AM (1.7 ft) and 6:01 PM (-0.2 ft).

Tide todayHigh 11:32 AMLow 5:25 AM · Low 6:01 PM
Today's range9.6 ft-0.2 → 9.4 ft (MLLW)
Wind (forecast)Loading…   
Sun8:18 AM – 6:02 PMFirst light 7:38 AM · Last light 6:42 PM

Wind: NOAA National Weather Service hourly forecast (api.weather.gov); no observing station within 25 mi.

Chowiet Island, Semidi Island tides — next 3 days

Shaded = night · heights in feet above MLLW · local time

YesterdayFri, Oct 23
6 AMNoon6 PM4:50a · 1.7′11:02a · 8.7′5:25p · 1.0′11:31p · 8.2′
  • Low 4:50 AM 1.7 ft
  • High 11:02 AM 8.7 ft
  • Low 5:25 PM 1.0 ft
  • High 11:31 PM 8.2 ft

First light 7:36 AMSunrise 8:15 AMSunset 6:05 PMLast light 6:44 PM

TodaySat, Oct 24
6 AMNoon6 PM5:25a · 1.7′11:32a · 9.4′6:01p · -0.2′
  • Low 5:25 AM 1.7 ft
  • High 11:32 AM 9.4 ft
  • Low 6:01 PM -0.2 ft

First light 7:38 AMSunrise 8:18 AMSunset 6:02 PMLast light 6:42 PM

TomorrowSun, Oct 25
6 AMNoon6 PM12:16a · 8.5′6a · 1.9′12:04p · 10.0′6:39p · -1.1′
  • High 12:16 AM 8.5 ft
  • Low 6:00 AM 1.9 ft
  • High 12:04 PM 10.0 ft
  • Low 6:39 PM -1.1 ft

First light 7:40 AMSunrise 8:20 AMSunset 6:00 PMLast light 6:39 PM

MondayMon, Oct 26
6 AMNoon6 PM1a · 8.7′6:35a · 2.1′12:36p · 10.5′7:19p · -1.8′
  • High 1:00 AM 8.7 ft
  • Low 6:35 AM 2.1 ft
  • High 12:36 PM 10.5 ft
  • Low 7:19 PM -1.8 ft

First light 7:42 AMSunrise 8:22 AMSunset 5:58 PMLast light 6:37 PM

TuesdayTue, Oct 27
6 AMNoon6 PM1:45a · 8.7′7:10a · 2.5′1:12p · 10.8′8:01p · -2.1′
  • High 1:45 AM 8.7 ft
  • Low 7:10 AM 2.5 ft
  • High 1:12 PM 10.8 ft
  • Low 8:01 PM -2.1 ft

First light 7:44 AMSunrise 8:24 AMSunset 5:55 PMLast light 6:35 PM

Chowiet Island, Semidi Island tide table — next 8 days

Fri, Oct 23Low 4:50 AM
1.68 ft		High 11:02 AM
8.68 ft		Low 5:25 PM
0.97 ft		High 11:31 PM
8.15 ft
Sat, Oct 24Low 5:25 AM
1.73 ft		High 11:32 AM
9.39 ft		Low 6:01 PM
-0.17 ft
Sun, Oct 25High 12:16 AM
8.54 ft		Low 6:00 AM
1.89 ft		High 12:04 PM
10.01 ft		Low 6:39 PM
-1.13 ft
Mon, Oct 26High 1:00 AM
8.75 ft		Low 6:35 AM
2.14 ft		High 12:36 PM
10.49 ft		Low 7:19 PM
-1.82 ft
Tue, Oct 27High 1:45 AM
8.72 ft		Low 7:10 AM
2.48 ft		High 1:12 PM
10.77 ft		Low 8:01 PM
-2.14 ft
Wed, Oct 28High 2:31 AM
8.47 ft		Low 7:48 AM
2.87 ft		High 1:49 PM
10.77 ft		Low 8:46 PM
-2.08 ft
Thu, Oct 29High 3:20 AM
8.04 ft		Low 8:28 AM
3.31 ft		High 2:31 PM
10.48 ft		Low 9:35 PM
-1.66 ft
Fri, Oct 30High 4:14 AM
7.53 ft		Low 9:14 AM
3.78 ft		High 3:19 PM
9.89 ft		Low 10:29 PM
-0.97 ft
Sat, Oct 31High 5:16 AM
7.10 ft		Low 10:11 AM
4.22 ft		High 4:16 PM
9.06 ft		Low 11:32 PM
-0.16 ft

Times are local (standard/daylight). Heights in feet above MLLW.

Nearby tide stations

About this station

NOAA station ID
9458519
Type
Reference (harmonic) station
Coordinates
56.0517, -156.6980
Datum
MLLW (feet)
Time zone
America/Adak

FAQ

When is high tide today at Chowiet Island, Semidi Island, AK?

On Sat, Oct 24, predicted high tide at Chowiet Island, Semidi Island, AK is at 11:32 AM local time.

When is low tide today at Chowiet Island, Semidi Island, AK?

On Sat, Oct 24, predicted low tide at Chowiet Island, Semidi Island, AK is at 5:25 AM, 6:01 PM local time.

Where does this tide data come from?

Predictions come from NOAA's Center for Operational Oceanographic Products and Services (CO-OPS), station 9458519. Heights are in feet relative to Mean Lower Low Water (MLLW).