Alaska tide station
Castle Islands, Duncan Canal tide times
Today, Sunday, October 18, 2026: high tide at 7:36 AM (10.7 ft) and 7:10 PM (11.6 ft); low tide at 12:15 AM (3.2 ft) and 12:16 PM (7.2 ft). Water temperature 50.4 F at buoy ITKA2 (87 mi away).
Low tide▼
12:15AM
3.2FT MLLW
low
High tide▲
7:36AM
10.7FT MLLW
high
Low tide▼
12:16PM
7.2FT MLLW
low
High tide▲
7:10PM
11.6FT MLLW
high
Water temp°F
50.4
10.2C
buoy ITKA2, 87 mi
predicted height above MLLWnightnow (build time; your browser updates it)
As of 1:20 AM the tide is rising toward high tide at 7:36 AM (10.7 ft).
First Quarter 52% litSunrise 7:32 AMSunset 5:43 PMDaylight 10h 10mAKDT
- High tide at Castle Islands, Duncan Canal, Alaska on is at 7:36 AM (10.7 ft above MLLW) and 7:10 PM (11.6 ft above MLLW).
- Low tide at Castle Islands, Duncan Canal on is at 12:15 AM (3.2 ft) and 12:16 PM (7.2 ft).
- Today's tidal range at Castle Islands, Duncan Canal is 8.3 ft (highest high 11.6 ft, lowest low 3.2 ft).
- The nearest NOAA water temperature to Castle Islands, Duncan Canal is 50.4 F at buoy ITKA2 (87 mi away), as of .
- Sunrise 7:32 AM, sunset 5:43 PM (AKDT); moon first quarter, 52% illuminated.
- Predictions are NOAA CO-OPS tide predictions for station 9451321 (harmonic reference station), heights above MLLW.
Next 7 days at Castle Islands, Duncan Canal
| Date | Tide 1 | Tide 2 | Tide 3 | Tide 4 | Sunrise | Sunset | Moon |
|---|---|---|---|---|---|---|---|
| Sun Oct 18today | 12:15 AM3.2 ft | 7:36 AM10.7 ft | 12:16 PM7.2 ft | 7:10 PM11.6 ft | 7:32 AM | 5:43 PM | 52% |
| Mon Oct 19 | 1:28 AM3.8 ft | 8:54 AM11.1 ft | 1:52 PM7.3 ft | 8:39 PM11.5 ft | 7:35 AM | 5:40 PM | 63% |
| Tue Oct 20 | 2:55 AM3.8 ft | 9:53 AM12.0 ft | 3:42 PM6.3 ft | 9:48 PM12.1 ft | 7:37 AM | 5:38 PM | 73% |
| Wed Oct 21 | 4:04 AM3.1 ft | 10:37 AM13.2 ft | 4:42 PM4.6 ft | 10:43 PM13.1 ft | 7:39 AM | 5:35 PM | 82% |
| Thu Oct 22 | 4:51 AM2.4 ft | 11:15 AM14.5 ft | 5:23 PM2.6 ft | 11:31 PM14.1 ft | 7:41 AM | 5:33 PM | 89% |
| Fri Oct 23 | 5:29 AM1.7 ft | 11:51 AM15.8 ft | 5:59 PM0.7 ft | 7:43 AM | 5:31 PM | 95% | |
| Sat Oct 24 | 12:15 AM15.1 ft | 6:04 AM1.1 ft | 12:26 PM17.0 ft | 6:35 PM-1.0 ft | 7:45 AM | 5:28 PM | 98% |
Water temperature near Castle Islands, Duncan Canal
50.4 F (10.2 C)
NDBC buoy ITKA2 (9451600 - Sitka, AK), 87 mi away, observed 08:48 UTC October 18, 2026
Water temperature is the nearest NOAA reading to Castle Islands, Duncan Canal, not a measurement at the tide gauge itself (this station has no water-temperature sensor). See water temperature by state for every sensor and buoy.
Tide tables
October 2026 tide table
| Date | Tide 1 | Tide 2 | Tide 3 | Tide 4 | Sunrise | Sunset | Moon |
|---|---|---|---|---|---|---|---|
| Thu Oct 1 | 6:57 AM | 6:27 PM | 71% | ||||
| Fri Oct 2 | 6:59 AM | 6:25 PM | 61% | ||||
| Sat Oct 3 | 7:01 AM | 6:22 PM | 50% | ||||
| Sun Oct 4 | 7:03 AM | 6:19 PM | 40% | ||||
| Mon Oct 5 | 7:05 AM | 6:17 PM | 29% | ||||
| Tue Oct 6 | 7:07 AM | 6:14 PM | 20% | ||||
| Wed Oct 7 | 7:09 AM | 6:11 PM | 12% | ||||
| Thu Oct 8 | 7:11 AM | 6:09 PM | 6% | ||||
| Fri Oct 9 | 7:13 AM | 6:06 PM | 2% | ||||
| Sat Oct 10 | 7:16 AM | 6:03 PM | 0% | ||||
| Sun Oct 11 | 7:18 AM | 6:01 PM | 0% | ||||
| Mon Oct 12 | 7:20 AM | 5:58 PM | 3% | ||||
| Tue Oct 13 | 7:22 AM | 5:56 PM | 8% | ||||
| Wed Oct 14 | 7:24 AM | 5:53 PM | 14% | ||||
| Thu Oct 15 | 7:26 AM | 5:51 PM | 22% | ||||
| Fri Oct 16 | 5:19 AM12.2 ft | 10:24 AM5.4 ft | 4:51 PM13.7 ft | 11:18 PM2.2 ft | 7:28 AM | 5:48 PM | 32% |
| Sat Oct 17 | 6:19 AM11.2 ft | 11:11 AM6.4 ft | 5:46 PM12.5 ft | 7:30 AM | 5:45 PM | 42% | |
| Sun Oct 18today | 12:15 AM3.2 ft | 7:36 AM10.7 ft | 12:16 PM7.2 ft | 7:10 PM11.6 ft | 7:32 AM | 5:43 PM | 52% |
| Mon Oct 19 | 1:28 AM3.8 ft | 8:54 AM11.1 ft | 1:52 PM7.3 ft | 8:39 PM11.5 ft | 7:35 AM | 5:40 PM | 63% |
| Tue Oct 20 | 2:55 AM3.8 ft | 9:53 AM12.0 ft | 3:42 PM6.3 ft | 9:48 PM12.1 ft | 7:37 AM | 5:38 PM | 73% |
| Wed Oct 21 | 4:04 AM3.1 ft | 10:37 AM13.2 ft | 4:42 PM4.6 ft | 10:43 PM13.1 ft | 7:39 AM | 5:35 PM | 82% |
| Thu Oct 22 | 4:51 AM2.4 ft | 11:15 AM14.5 ft | 5:23 PM2.6 ft | 11:31 PM14.1 ft | 7:41 AM | 5:33 PM | 89% |
| Fri Oct 23 | 5:29 AM1.7 ft | 11:51 AM15.8 ft | 5:59 PM0.7 ft | 7:43 AM | 5:31 PM | 95% | |
| Sat Oct 24 | 12:15 AM15.1 ft | 6:04 AM1.1 ft | 12:26 PM17.0 ft | 6:35 PM-1.0 ft | 7:45 AM | 5:28 PM | 98% |
| Sun Oct 25 | 12:57 AM16.0 ft | 6:39 AM0.9 ft | 1:00 PM18.0 ft | 7:11 PM-2.4 ft | 7:48 AM | 5:26 PM | 100% |
| Mon Oct 26 | 1:39 AM16.5 ft | 7:14 AM0.9 ft | 1:36 PM18.6 ft | 7:49 PM-3.2 ft | 7:50 AM | 5:23 PM | 99% |
| Tue Oct 27 | 2:21 AM16.6 ft | 7:51 AM1.3 ft | 2:13 PM18.9 ft | 8:29 PM-3.5 ft | 7:52 AM | 5:21 PM | 96% |
| Wed Oct 28 | 3:05 AM16.2 ft | 8:29 AM2.0 ft | 2:52 PM18.7 ft | 9:12 PM-3.1 ft | 7:54 AM | 5:19 PM | 91% |
| Thu Oct 29 | 3:51 AM15.4 ft | 9:11 AM2.9 ft | 3:34 PM17.9 ft | 10:01 PM-2.1 ft | 7:56 AM | 5:16 PM | 84% |
| Fri Oct 30 | 4:43 AM14.4 ft | 9:59 AM4.0 ft | 4:24 PM16.7 ft | 10:55 PM-0.8 ft | 7:58 AM | 5:14 PM | 76% |
| Sat Oct 31 | 5:44 AM13.4 ft | 10:57 AM5.0 ft | 5:25 PM15.2 ft | 11:57 PM0.5 ft | 8:01 AM | 5:12 PM | 66% |
November 2026 tide table
| Date | Tide 1 | Tide 2 | Tide 3 | Tide 4 | Sunrise | Sunset | Moon |
|---|---|---|---|---|---|---|---|
| Sun Nov 1 | 5:55 AM12.8 ft | 11:11 AM5.8 ft | 5:43 PM13.8 ft | 7:03 AM | 4:09 PM | 55% | |
| Mon Nov 2 | 12:10 AM1.6 ft | 7:12 AM12.9 ft | 12:46 PM5.8 ft | 7:10 PM13.1 ft | 7:05 AM | 4:07 PM | 45% |
| Tue Nov 3 | 1:33 AM2.2 ft | 8:20 AM13.7 ft | 2:32 PM4.7 ft | 8:30 PM13.2 ft | 7:07 AM | 4:05 PM | 34% |
| Wed Nov 4 | 2:50 AM2.3 ft | 9:15 AM14.8 ft | 3:43 PM3.0 ft | 9:35 PM13.7 ft | 7:09 AM | 4:03 PM | 25% |
| Thu Nov 5 | 3:47 AM2.1 ft | 10:01 AM15.8 ft | 4:33 PM1.3 ft | 10:30 PM14.3 ft | 7:12 AM | 4:01 PM | 16% |
| Fri Nov 6 | 4:32 AM2.0 ft | 10:42 AM16.7 ft | 5:13 PM-0.1 ft | 11:18 PM14.9 ft | 7:14 AM | 3:59 PM | 9% |
| Sat Nov 7 | 5:10 AM2.1 ft | 11:20 AM17.3 ft | 5:48 PM-1.0 ft | 7:16 AM | 3:57 PM | 4% | |
| Sun Nov 8 | 12:01 AM15.2 ft | 5:44 AM2.3 ft | 11:57 AM17.7 ft | 6:20 PM-1.5 ft | 7:18 AM | 3:54 PM | 1% |
| Mon Nov 9 | 12:41 AM15.4 ft | 6:15 AM2.6 ft | 12:31 PM17.7 ft | 6:52 PM-1.7 ft | 7:20 AM | 3:52 PM | 0% |
| Tue Nov 10 | 1:19 AM15.3 ft | 6:46 AM3.1 ft | 1:06 PM17.4 ft | 7:23 PM-1.4 ft | 7:23 AM | 3:51 PM | 1% |
| Wed Nov 11 | 1:56 AM14.9 ft | 7:17 AM3.6 ft | 1:39 PM16.9 ft | 7:56 PM-0.9 ft | 7:25 AM | 3:49 PM | 5% |
| Thu Nov 12 | 2:34 AM14.4 ft | 7:49 AM4.2 ft | 2:13 PM16.1 ft | 8:31 PM-0.2 ft | 7:27 AM | 3:47 PM | 11% |
| Fri Nov 13 | 3:15 AM13.6 ft | 8:25 AM4.9 ft | 2:49 PM15.2 ft | 9:10 PM0.6 ft | 7:29 AM | 3:45 PM | 18% |
| Sat Nov 14 | 4:00 AM12.8 ft | 9:06 AM5.6 ft | 3:28 PM14.1 ft | 9:53 PM1.5 ft | 7:31 AM | 3:43 PM | 27% |
| Sun Nov 15 | 4:52 AM12.2 ft | 9:56 AM6.2 ft | 4:16 PM12.9 ft | 10:42 PM2.3 ft | 7:33 AM | 3:41 PM | 37% |
| Mon Nov 16 | 5:53 AM11.9 ft | 10:57 AM6.6 ft | 5:24 PM11.9 ft | 11:36 PM2.9 ft | 7:35 AM | 3:39 PM | 47% |
| Tue Nov 17 | 6:56 AM12.0 ft | 12:11 PM6.5 ft | 6:45 PM11.4 ft | 7:37 AM | 3:38 PM | 58% | |
| Wed Nov 18 | 12:37 AM3.4 ft | 7:53 AM12.7 ft | 1:34 PM5.6 ft | 8:00 PM11.6 ft | 7:39 AM | 3:36 PM | 68% |
| Thu Nov 19 | 1:42 AM3.5 ft | 8:42 AM13.7 ft | 2:46 PM4.1 ft | 9:02 PM12.3 ft | 7:42 AM | 3:35 PM | 77% |
| Fri Nov 20 | 2:42 AM3.4 ft | 9:24 AM14.9 ft | 3:40 PM2.3 ft | 9:57 PM13.2 ft | 7:44 AM | 3:33 PM | 86% |
| Sat Nov 21 | 3:34 AM3.1 ft | 10:05 AM16.1 ft | 4:25 PM0.4 ft | 10:47 PM14.2 ft | 7:46 AM | 3:31 PM | 92% |
| Sun Nov 22 | 4:21 AM2.8 ft | 10:45 AM17.3 ft | 5:08 PM-1.4 ft | 11:35 PM15.1 ft | 7:48 AM | 3:30 PM | 97% |
| Mon Nov 23 | 5:05 AM2.6 ft | 11:26 AM18.3 ft | 5:50 PM-2.7 ft | 7:50 AM | 3:29 PM | 100% | |
| Tue Nov 24 | 12:22 AM15.8 ft | 5:48 AM2.5 ft | 12:09 PM19.1 ft | 6:33 PM-3.6 ft | 7:52 AM | 3:27 PM | 100% |
| Wed Nov 25 | 1:09 AM16.2 ft | 6:31 AM2.5 ft | 12:53 PM19.4 ft | 7:17 PM-3.8 ft | 7:53 AM | 3:26 PM | 98% |
| Thu Nov 26 | 1:55 AM16.1 ft | 7:16 AM2.8 ft | 1:38 PM19.1 ft | 8:04 PM-3.4 ft | 7:55 AM | 3:25 PM | 94% |
| Fri Nov 27 | 2:44 AM15.8 ft | 8:04 AM3.2 ft | 2:26 PM18.4 ft | 8:54 PM-2.6 ft | 7:57 AM | 3:24 PM | 88% |
| Sat Nov 28 | 3:35 AM15.2 ft | 8:58 AM3.8 ft | 3:19 PM17.1 ft | 9:47 PM-1.4 ft | 7:59 AM | 3:22 PM | 80% |
| Sun Nov 29 | 4:31 AM14.7 ft | 9:59 AM4.4 ft | 4:19 PM15.5 ft | 10:43 PM-0.1 ft | 8:01 AM | 3:21 PM | 71% |
| Mon Nov 30 | 5:32 AM14.3 ft | 11:10 AM4.7 ft | 5:28 PM14.0 ft | 11:42 PM1.3 ft | 8:02 AM | 3:20 PM | 61% |
Tidal datums at Castle Islands, Duncan Canal
Heights on this page are above mean lower low water (MLLW), the chart datum. NOAA's accepted datums for station 9451321, in feet above MLLW:
MHHW
31.67 ft
Mean higher high water
MHW
30.78 ft
Mean high water
MSL
23.85 ft
Mean sea level
MLW
17.35 ft
Mean low water
MN
13.43 ft
Mean range
GT
15.83 ft
Diurnal range
Nearby tide stations
- Beecher Pass7.1 mi · next high 7:28 AM
- Anchor Point8.6 mi · next high 7:21 AM
- Papke's Landing8.6 mi · next high 7:20 AM
- Point Lockwood, Woewodski Island9.3 mi · next high 7:26 AM
- Turn Point13 mi · next high 7:24 AM
- Petersburg14 mi · next high 7:46 AM
Questions
What time is high tide at Castle Islands, Duncan Canal today?
High tide at Castle Islands, Duncan Canal, Alaska on Sunday, October 18, 2026 is at 7:36 AM (10.7 ft above MLLW) and 7:10 PM (11.6 ft above MLLW), NOAA prediction, local time.
What time is low tide at Castle Islands, Duncan Canal today?
Low tide at Castle Islands, Duncan Canal on Sunday, October 18, 2026 is at 12:15 AM (3.2 ft) and 12:16 PM (7.2 ft).
What is the water temperature at Castle Islands, Duncan Canal?
The nearest NOAA water-temperature reading to Castle Islands, Duncan Canal is 50.4 F at buoy ITKA2 (87 mi away), as of October 18, 2026.
Not for navigation. Predictions do not include weather; wind and pressure can move the real water level by a foot or more. Source: NOAA CO-OPS station 9451321.