Castle Islands, Duncan Canal, AK Tide Chart & Tide Times

NOAA tide station 9451321 · Alaska · updated Oct 23, 2026

Sat, Oct 24: High tide 12:15 AM (15.1 ft) and 12:26 PM (17.0 ft); low tide 6:04 AM (1.1 ft) and 6:35 PM (-1.0 ft).

Tide todayHigh 12:15 AM · High 12:26 PMLow 6:04 AM · Low 6:35 PM
Today's range17.9 ft-1.0 → 17.0 ft (MLLW)
Wind (forecast)Loading…   
Sun7:45 AM – 5:27 PMFirst light 7:05 AM · Last light 6:07 PM

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

Castle Islands, Duncan Canal tides — next 3 days

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

YesterdayFri, Oct 23
6 AMNoon6 PM5:29a · 1.7′11:51a · 15.8′5:59p · 0.7′
  • Low 5:29 AM 1.7 ft
  • High 11:51 AM 15.8 ft
  • Low 5:59 PM 0.7 ft

First light 7:03 AMSunrise 7:43 AMSunset 5:29 PMLast light 6:09 PM

TodaySat, Oct 24
6 AMNoon6 PM12:15a · 15.1′6:04a · 1.1′12:26p · 17.0′6:35p · -1.0′
  • High 12:15 AM 15.1 ft
  • Low 6:04 AM 1.1 ft
  • High 12:26 PM 17.0 ft
  • Low 6:35 PM -1.0 ft

First light 7:05 AMSunrise 7:45 AMSunset 5:27 PMLast light 6:07 PM

TomorrowSun, Oct 25
6 AMNoon6 PM12:57a · 16.0′6:39a · 0.9′1p · 18.0′7:11p · -2.4′
  • High 12:57 AM 16.0 ft
  • Low 6:39 AM 0.9 ft
  • High 1:00 PM 18.0 ft
  • Low 7:11 PM -2.4 ft

First light 7:07 AMSunrise 7:47 AMSunset 5:24 PMLast light 6:04 PM

MondayMon, Oct 26
6 AMNoon6 PM1:39a · 16.5′7:14a · 0.9′1:36p · 18.6′7:49p · -3.2′
  • High 1:39 AM 16.5 ft
  • Low 7:14 AM 0.9 ft
  • High 1:36 PM 18.6 ft
  • Low 7:49 PM -3.2 ft

First light 7:09 AMSunrise 7:49 AMSunset 5:22 PMLast light 6:02 PM

TuesdayTue, Oct 27
6 AMNoon6 PM2:21a · 16.6′7:51a · 1.3′2:13p · 18.9′8:29p · -3.5′
  • High 2:21 AM 16.6 ft
  • Low 7:51 AM 1.3 ft
  • High 2:13 PM 18.9 ft
  • Low 8:29 PM -3.5 ft

First light 7:11 AMSunrise 7:51 AMSunset 5:20 PMLast light 6:00 PM

Castle Islands, Duncan Canal tide table — next 8 days

Fri, Oct 23Low 5:29 AM
1.66 ft		High 11:51 AM
15.77 ft		Low 5:59 PM
0.75 ft
Sat, Oct 24High 12:15 AM
15.14 ft		Low 6:04 AM
1.15 ft		High 12:26 PM
16.96 ft		Low 6:35 PM
-0.98 ft
Sun, Oct 25High 12:57 AM
15.96 ft		Low 6:39 AM
0.89 ft		High 1:00 PM
17.95 ft		Low 7:11 PM
-2.35 ft
Mon, Oct 26High 1:39 AM
16.46 ft		Low 7:14 AM
0.93 ft		High 1:36 PM
18.63 ft		Low 7:49 PM
-3.21 ft
Tue, Oct 27High 2:21 AM
16.56 ft		Low 7:51 AM
1.29 ft		High 2:13 PM
18.90 ft		Low 8:29 PM
-3.46 ft
Wed, Oct 28High 3:05 AM
16.20 ft		Low 8:29 AM
1.95 ft		High 2:52 PM
18.68 ft		Low 9:12 PM
-3.06 ft
Thu, Oct 29High 3:51 AM
15.43 ft		Low 9:11 AM
2.87 ft		High 3:34 PM
17.93 ft		Low 10:01 PM
-2.13 ft
Fri, Oct 30High 4:43 AM
14.40 ft		Low 9:59 AM
3.96 ft		High 4:24 PM
16.70 ft		Low 10:55 PM
-0.85 ft
Sat, Oct 31High 5:44 AM
13.40 ft		Low 10:57 AM
5.03 ft		High 5:25 PM
15.18 ft		Low 11:57 PM
0.50 ft

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

Nearby tide stations

About this station

NOAA station ID
9451321
Type
Reference (harmonic) station
Coordinates
56.6433, -133.1520
Datum
MLLW (feet)
Time zone
America/Anchorage

FAQ

When is high tide today at Castle Islands, Duncan Canal, AK?

On Sat, Oct 24, predicted high tide at Castle Islands, Duncan Canal, AK is at 12:15 AM, 12:26 PM local time.

When is low tide today at Castle Islands, Duncan Canal, AK?

On Sat, Oct 24, predicted low tide at Castle Islands, Duncan Canal, AK is at 6:04 AM, 6:35 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 9451321. Heights are in feet relative to Mean Lower Low Water (MLLW).