NOAA station 9451321, Alaska
Castle Islands, Duncan Canal tide chart
Friday, October 30Alaska Daylight Time
NOAA harmonic station (NOAA’s page for this station, opens in a new tab)Falling, about 14.9 ft now
As of 5:46 PM AKDT
- Next
- Low -0.8 ft at 10:55 PMin 5h 9m
- Then
- High 13.4 ft at 5:44 AMtomorrow, in 11h 58m
High, passed
4:43 AM
14.4 ft
Low, passed
9:59 AM
4.0 ft
High, passed
4:24 PM
16.7 ft
- Next
Low
10:55 PM
-0.8 ft
The week ahead
This week’s tides at Castle Islands, Duncan Canal
Every high and low for the next seven days, in feet above MLLW. The 30-day table below has the rest of the month.
| Day | Tide curve | Highs | Lows | Range |
|---|---|---|---|---|
| Fri, Oct 30Range 17.5 ft | 4:43 AM 14.4 ft4:24 PM 16.7 ft | 9:59 AM 4.0 ft10:55 PM -0.8 ft | 17.5 ft | |
| Sat, Oct 31Range 14.7 ft | 5:44 AM 13.4 ft5:25 PM 15.2 ft | 10:57 AM 5.0 ft11:57 PM 0.5 ft | 14.7 ft | |
| Sun, Nov 1Range 8.0 ft | 5:55 AM 12.8 ft5:43 PM 13.8 ft | 11:11 AM 5.8 ft | 8.0 ft | |
| Mon, Nov 2Range 11.5 ft | 7:12 AM 12.9 ft7:10 PM 13.1 ft | 12:10 AM 1.6 ft12:46 PM 5.8 ft | 11.5 ft | |
| Tue, Nov 3Range 11.5 ft | 8:20 AM 13.7 ft8:30 PM 13.2 ft | 1:33 AM 2.2 ft2:32 PM 4.7 ft | 11.5 ft | |
| Wed, Nov 4Range 12.5 ft | 9:15 AM 14.8 ft9:35 PM 13.7 ft | 2:50 AM 2.3 ft3:43 PM 3.0 ft | 12.5 ft | |
| Thu, Nov 5Range 14.5 ft | 10:01 AM 15.8 ft10:30 PM 14.3 ft | 3:47 AM 2.1 ft4:33 PM 1.3 ft | 14.5 ft |
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Castle Islands, Duncan Canal tide table for the next 30 days
Every high and low for the next month, with the daily tidal range.
| Day | Highs | Lows | Range |
|---|---|---|---|
| Fri, Oct 30Range 17.5 ft | 4:43 AM 14.4 ft4:24 PM 16.7 ft | 9:59 AM 4.0 ft10:55 PM -0.8 ft | 17.5 ft |
| Sat, Oct 31Range 14.7 ft | 5:44 AM 13.4 ft5:25 PM 15.2 ft | 10:57 AM 5.0 ft11:57 PM 0.5 ft | 14.7 ft |
| Sun, Nov 1Range 8.0 ft | 5:55 AM 12.8 ft5:43 PM 13.8 ft | 11:11 AM 5.8 ft | 8.0 ft |
| Mon, Nov 2Range 11.5 ft | 7:12 AM 12.9 ft7:10 PM 13.1 ft | 12:10 AM 1.6 ft12:46 PM 5.8 ft | 11.5 ft |
| Tue, Nov 3Range 11.5 ft | 8:20 AM 13.7 ft8:30 PM 13.2 ft | 1:33 AM 2.2 ft2:32 PM 4.7 ft | 11.5 ft |
| Wed, Nov 4Range 12.5 ft | 9:15 AM 14.8 ft9:35 PM 13.7 ft | 2:50 AM 2.3 ft3:43 PM 3.0 ft | 12.5 ft |
| Thu, Nov 5Range 14.5 ft | 10:01 AM 15.8 ft10:30 PM 14.3 ft | 3:47 AM 2.1 ft4:33 PM 1.3 ft | 14.5 ft |
| Fri, Nov 6Range 16.8 ft | 10:42 AM 16.7 ft11:18 PM 14.9 ft | 4:32 AM 2.0 ft5:13 PM -0.1 ft | 16.8 ft |
| Sat, Nov 7Range 18.3 ft | 11:20 AM 17.3 ft | 5:10 AM 2.1 ft5:48 PM -1.0 ft | 18.3 ft |
| Sun, Nov 8Range 19.2 ft | 12:01 AM 15.2 ft11:57 AM 17.7 ft | 5:44 AM 2.3 ft6:20 PM -1.5 ft | 19.2 ft |
| Mon, Nov 9Range 19.4 ft | 12:41 AM 15.4 ft12:31 PM 17.7 ft | 6:15 AM 2.6 ft6:52 PM -1.7 ft | 19.4 ft |
| Tue, Nov 10Range 18.8 ft | 1:19 AM 15.3 ft1:06 PM 17.4 ft | 6:46 AM 3.1 ft7:23 PM -1.4 ft | 18.8 ft |
| Wed, Nov 11Range 17.8 ft | 1:56 AM 14.9 ft1:39 PM 16.9 ft | 7:17 AM 3.6 ft7:56 PM -0.9 ft | 17.8 ft |
| Thu, Nov 12Range 16.3 ft | 2:34 AM 14.4 ft2:13 PM 16.1 ft | 7:49 AM 4.2 ft8:31 PM -0.2 ft | 16.3 ft |
Show days 15 to 30Hide days 15 to 30 | |||
| Fri, Nov 13Range 14.6 ft | 3:15 AM 13.6 ft2:49 PM 15.2 ft | 8:25 AM 4.9 ft9:10 PM 0.6 ft | 14.6 ft |
| Sat, Nov 14Range 12.6 ft | 4:00 AM 12.8 ft3:28 PM 14.1 ft | 9:06 AM 5.6 ft9:53 PM 1.5 ft | 12.6 ft |
| Sun, Nov 15Range 10.6 ft | 4:52 AM 12.2 ft4:16 PM 12.9 ft | 9:56 AM 6.2 ft10:42 PM 2.3 ft | 10.6 ft |
| Mon, Nov 16Range 9.0 ft | 5:53 AM 11.9 ft5:24 PM 11.9 ft | 10:57 AM 6.6 ft11:36 PM 2.9 ft | 9.0 ft |
| Tue, Nov 17Range 5.5 ft | 6:56 AM 12.0 ft6:45 PM 11.4 ft | 12:11 PM 6.5 ft | 5.5 ft |
| Wed, Nov 18Range 9.3 ft | 7:53 AM 12.7 ft8:00 PM 11.6 ft | 12:37 AM 3.4 ft1:34 PM 5.6 ft | 9.3 ft |
| Thu, Nov 19Range 10.2 ft | 8:42 AM 13.7 ft9:02 PM 12.3 ft | 1:42 AM 3.5 ft2:46 PM 4.1 ft | 10.2 ft |
| Fri, Nov 20Range 12.6 ft | 9:24 AM 14.9 ft9:57 PM 13.2 ft | 2:42 AM 3.4 ft3:40 PM 2.3 ft | 12.6 ft |
| Sat, Nov 21Range 15.7 ft | 10:05 AM 16.1 ft10:47 PM 14.2 ft | 3:34 AM 3.1 ft4:25 PM 0.4 ft | 15.7 ft |
| Sun, Nov 22Range 18.7 ft | 10:45 AM 17.3 ft11:35 PM 15.1 ft | 4:21 AM 2.8 ft5:08 PM -1.4 ft | 18.7 ft |
| Mon, Nov 23Range 21.0 ft | 11:26 AM 18.3 ft | 5:05 AM 2.6 ft5:50 PM -2.7 ft | 21.0 ft |
| Tue, Nov 24Range 22.7 ft | 12:22 AM 15.8 ft12:09 PM 19.1 ft | 5:48 AM 2.5 ft6:33 PM -3.6 ft | 22.7 ft |
| Wed, Nov 25Range 23.2 ft | 1:09 AM 16.2 ft12:53 PM 19.4 ft | 6:31 AM 2.5 ft7:17 PM -3.8 ft | 23.2 ft |
| Thu, Nov 26Range 22.6 ft | 1:55 AM 16.1 ft1:38 PM 19.2 ft | 7:16 AM 2.8 ft8:04 PM -3.4 ft | 22.6 ft |
| Fri, Nov 27Range 21.0 ft | 2:44 AM 15.8 ft2:26 PM 18.4 ft | 8:04 AM 3.2 ft8:54 PM -2.6 ft | 21.0 ft |
| Sat, Nov 28Range 18.5 ft | 3:35 AM 15.2 ft3:19 PM 17.1 ft | 8:58 AM 3.8 ft9:47 PM -1.4 ft | 18.5 ft |
Conditions at Castle Islands, Duncan Canal
Today's sunrise and sunset.
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About Castle Islands, Duncan Canal tides
Castle Islands, Duncan Canal is a NOAA harmonic tide station (9451321): its predictions come from the tidal constituents NOAA derived from water levels measured at this spot. Heights are in feet above MLLW (Mean Lower Low Water), the datum of US nautical charts, so they line up with charted depths.
In the next 30 days, Castle Islands, Duncan Canal has two highs and two lows on 26 days and three turns on 4 days, and the daily range runs from 5.5 to 23.2 ft. That is a mixed tide: two highs and two lows on most days, of clearly different heights.
Use the curve above to time a harbor entrance, a beach walk, fishing a moving tide or clearing a shallow bar, and remember that wind, air pressure and river flow can push the real water level above or below the prediction. The daily tidal range in the tables shows how much water moves each day: bigger ranges around the new and full moon mean stronger currents.
Frequently asked
What time is high tide in Castle Islands, Duncan Canal today?+
Today (Friday, October 30), high tide at Castle Islands, Duncan Canal is at 4:43 AM (14.4 ft), 4:24 PM (16.7 ft). Heights are referenced to MLLW (Mean Lower Low Water).
What time is low tide in Castle Islands, Duncan Canal today?+
Today, low tide at Castle Islands, Duncan Canal is at 9:59 AM (4.0 ft), 10:55 PM (-0.8 ft).
What tidal datum do these Castle Islands, Duncan Canal tide heights use?+
All heights are given in feet relative to MLLW (Mean Lower Low Water), the standard NOAA chart datum for US tidal waters. A tide of 0.0 ft equals the chart datum; negative tides fall below it.
How accurate are these tide predictions?+
Castle Islands, Duncan Canal is a NOAA harmonic station (9451321), so these are NOAA's harmonic predictions for this spot, which are very accurate for the astronomical tide. Real water levels can still differ with wind, air pressure and river flow, so check conditions before you get underway.
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