Udamat Bay, Sedanka Island tide chart
Alaska · near Unalaska (13 mi) · NOAA station 9462645 · times in local time (AKDT)
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Tides today, Sunday, October 11
- High 4:21 AM 4.5 ft
- Low 9:42 AM 2.0 ft
- High 3:42 PM 5.3 ft
- Low 10:28 PM -0.3 ft
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Sunrise 9:26 AM · Sunset 8:18 PM · New moon (0%)
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Fishing forecast
Hour by hour at Udamat Bay, Sedanka IslandBest times
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Weather and conditions at Udamat Bay, Sedanka Island
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Marine forecast: Unalga Pass to Nikolski Pacific Side out to 15 NM
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- Water temperature —
Marine radio: weather channels and VHF
NOAA Weather Radio
- 162.550 MHz WX1 WXK89, Unalaska, AK (14 mi)
To get alerts on a weather alert radio, program county code 002016 (Aleutians West).
VHF marine channels
- Ch 16 Distress, safety and calling
- Ch 9 Boater-to-boater calling
- Ch 22A Coast Guard safety broadcasts
- Ch 13 Bridge-to-bridge (big ships, drawbridges)
- Ch 68, 69, 71, 72, 78A Recreational chat
Weather radio broadcasts are continuous; VHF channels are the US standard. Local harbors and bridges may use others, so check your chart.
Live readings from NOAA and the National Weather Service, loaded when you open this page.
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Tide times this week
| Day | High and low tides | Sunrise / sunset | Moon |
|---|---|---|---|
| Sun Oct 11 | H 4:21 AM 4.5 ftL 9:42 AM 2.0 ftH 3:42 PM 5.3 ftL 10:28 PM -0.3 ft | 9:26 AM / 8:18 PM | New moon (0%) |
| Mon Oct 12 | H 5:07 AM 4.3 ftL 10:11 AM 2.4 ftH 4:08 PM 5.2 ftL 11:04 PM -0.3 ft | 9:28 AM / 8:16 PM | New moon (2%) |
| Tue Oct 13 | H 5:54 AM 4.1 ftL 10:40 AM 2.8 ftH 4:29 PM 5.1 ftL 11:41 PM -0.2 ft | 9:29 AM / 8:14 PM | Waxing crescent (7%) |
| Wed Oct 14 | H 6:45 AM 3.8 ftL 11:09 AM 3.1 ftH 4:36 PM 4.9 ft | 9:31 AM / 8:11 PM | Waxing crescent (13%) |
| Thu Oct 15 | L 12:22 AM 0.0 ftH 7:45 AM 3.6 ftL 11:36 AM 3.4 ftH 4:38 PM 4.8 ft | 9:33 AM / 8:09 PM | Waxing crescent (21%) |
| Fri Oct 16 | L 1:09 AM 0.3 ftH 4:59 PM 4.6 ft | 9:35 AM / 8:07 PM | Waxing crescent (30%) |
| Sat Oct 17 | L 2:06 AM 0.5 ftH 5:31 PM 4.4 ft | 9:37 AM / 8:04 PM | First quarter (40%) |
Tidal currents near Udamat Bay, Sedanka Island
From NOAA's current predictions for Sedanka Pass at 26 ft depth, 5.9 miles away. Slack is when the current turns and the water is calmest; flood runs in with the rising tide and ebb runs out with the falling tide. Times are the peak of each run, in knots. The flood runs toward the NNW (342°) and the ebb toward the SE (132°). The strongest current this week is 2.3 knots.
| Day | Slack water and peak currents |
|---|---|
| Sun Oct 11 | Slack 1:15 AMFlood 3:58 AM 2.3 knSlack 6:57 AMEbb 9:57 AM 1.1 knSlack 1:39 PMFlood 4:05 PM 1.8 knSlack 6:39 PMEbb 9:21 PM 1.5 kn |
| Mon Oct 12 | Slack 2:07 AMFlood 4:46 AM 2.3 knSlack 7:50 AMEbb 10:25 AM 1.0 knSlack 2:25 PMFlood 4:45 PM 1.6 knSlack 7:15 PMEbb 9:48 PM 1.4 kn |
| Tue Oct 13 | Slack 2:54 AMFlood 5:32 AM 2.2 knSlack 8:41 AMEbb 12:44 PM 0.8 knSlack 3:04 PMFlood 5:20 PM 1.4 knSlack 7:47 PMEbb 10:17 PM 1.3 kn |
| Wed Oct 14 | Slack 3:37 AMFlood 6:16 AM 2.0 knSlack 9:32 AMEbb 1:06 PM 0.7 knSlack 3:38 PMFlood 5:54 PM 1.2 knSlack 8:13 PMEbb 10:50 PM 1.2 kn |
| Thu Oct 15 | Slack 4:17 AMFlood 6:57 AM 1.8 knSlack 10:27 AMEbb 1:28 PM 0.7 knSlack 4:09 PMFlood 6:26 PM 1.0 knSlack 8:35 PMEbb 11:30 PM 1.1 kn |
| Fri Oct 16 | Slack 4:54 AMFlood 7:37 AM 1.6 knSlack 11:26 AMEbb 2:01 PM 0.6 knSlack 4:42 PMFlood 6:59 PM 0.8 knSlack 9:00 PM |
| Sat Oct 17 | Ebb 12:32 AM 1.0 knSlack 5:30 AMFlood 8:20 AM 1.4 knSlack 12:23 PMEbb 2:43 PM 0.7 knSlack 5:27 PMFlood 7:38 PM 0.7 knSlack 9:34 PM |
Current predictions can differ a lot over short distances: check the station location on NOAA before planning a passage.
Best fishing times at Udamat Bay, Sedanka Island
The bite score (0 to 100) adds up what anglers watch most: moving water (a tide running harder than usual here scores higher), solunar periods (major periods of about two hours centred on the moon overhead or underfoot, minor periods of about an hour on moonrise and moonset), dawn and dusk light, and how close it is to the new or full moon. Best times are the stretches of the day scoring near that day's top.
| Day | Bite score | Best times | Major periods | Minor periods |
|---|---|---|---|---|
| Sun Oct 11 | 89 · Excellent | 8:00 PM–9:00 PM | 2:28 AM–4:28 AM, 2:51 PM–4:51 PM | 10:51 AM–11:51 AM, 7:39 PM–8:39 PM |
| Mon Oct 12 | 77 · Excellent | 8:00 PM–9:00 PM | 3:14 AM–5:14 AM, 3:38 PM–5:38 PM | 12:11 PM–1:11 PM, 7:55 PM–8:55 PM |
| Tue Oct 13 | 68 · Good | 8:00 PM–9:00 PM | 4:02 AM–6:02 AM, 4:26 PM–6:26 PM | 1:29 PM–2:29 PM, 8:17 PM–9:17 PM |
| Wed Oct 14 | 57 · Good | 6:00 PM–10:00 PM | 4:51 AM–6:51 AM, 5:16 PM–7:16 PM | 2:40 PM–3:40 PM, 8:50 PM–9:50 PM |
| Thu Oct 15 | 48 · Fair | 7:00 PM–8:00 PM | 5:42 AM–7:42 AM, 6:07 PM–8:07 PM | 3:38 PM–4:38 PM, 9:37 PM–10:37 PM |
| Fri Oct 16 | 53 · Fair | 7:00 PM–9:00 PM | 6:33 AM–8:33 AM, 6:58 PM–8:58 PM | 4:22 PM–5:22 PM, 10:38 PM–11:38 PM |
| Sat Oct 17 | 46 · Fair | 8:00 PM–9:00 PM | 7:23 AM–9:23 AM, 7:47 PM–9:47 PM | 4:53 PM–5:53 PM |
A planning aid, not a guarantee. Wind, water clarity, bait and pressure changes matter too; the forecast above adds live wind and pressure when you open the page.
Best daylight low tides in the next two weeks
The lowest water that falls between sunrise and sunset, for tide pooling and beachcombing.
- 1.4 ft at 7:33 PM on Thursday, October 22
- 2.0 ft at 9:42 AM on Sunday, October 11
- 2.2 ft at 6:54 PM on Wednesday, October 21
- 2.4 ft at 10:11 AM on Monday, October 12
- 2.8 ft at 10:40 AM on Tuesday, October 13
- 2.9 ft at 6:10 PM on Tuesday, October 20
Tide table: October 11 to November 10, 2026
Full 2026 tide table Full 2027 tide table
| Day | High and low tides | Sunrise / sunset |
|---|---|---|
| Sun Oct 11 | H 4:21 AM 4.5 ftL 9:42 AM 2.0 ftH 3:42 PM 5.3 ftL 10:28 PM -0.3 ft | 9:26 AM / 8:18 PM |
| Mon Oct 12 | H 5:07 AM 4.3 ftL 10:11 AM 2.4 ftH 4:08 PM 5.2 ftL 11:04 PM -0.3 ft | 9:28 AM / 8:16 PM |
| Tue Oct 13 | H 5:54 AM 4.1 ftL 10:40 AM 2.8 ftH 4:29 PM 5.1 ftL 11:41 PM -0.2 ft | 9:29 AM / 8:14 PM |
| Wed Oct 14 | H 6:45 AM 3.8 ftL 11:09 AM 3.1 ftH 4:36 PM 4.9 ft | 9:31 AM / 8:11 PM |
| Thu Oct 15 | L 12:22 AM 0.0 ftH 7:45 AM 3.6 ftL 11:36 AM 3.4 ftH 4:38 PM 4.8 ft | 9:33 AM / 8:09 PM |
| Fri Oct 16 | L 1:09 AM 0.3 ftH 4:59 PM 4.6 ft | 9:35 AM / 8:07 PM |
| Sat Oct 17 | L 2:06 AM 0.5 ftH 5:31 PM 4.4 ft | 9:37 AM / 8:04 PM |
| Sun Oct 18 | L 3:12 AM 0.7 ftH 1:02 PM 3.9 ftL 3:10 PM 3.8 ftH 6:16 PM 4.0 ft | 9:39 AM / 8:02 PM |
| Mon Oct 19 | L 4:19 AM 0.8 ftH 1:19 PM 4.0 ftL 5:03 PM 3.5 ftH 10:08 PM 3.7 ft | 9:41 AM / 8:00 PM |
| Tue Oct 20 | L 5:17 AM 0.9 ftH 1:17 PM 4.1 ftL 6:10 PM 2.9 ftH 11:29 PM 3.8 ft | 9:43 AM / 7:58 PM |
| Wed Oct 21 | L 6:05 AM 0.9 ftH 1:04 PM 4.4 ftL 6:54 PM 2.2 ft | 9:45 AM / 7:55 PM |
| Thu Oct 22 | H 12:35 AM 4.0 ftL 6:47 AM 1.1 ftH 1:21 PM 4.7 ftL 7:33 PM 1.4 ft | 9:46 AM / 7:53 PM |
| Fri Oct 23 | H 1:32 AM 4.2 ftL 7:25 AM 1.3 ftH 1:46 PM 5.0 ftL 8:10 PM 0.7 ft | 9:48 AM / 7:51 PM |
| Sat Oct 24 | H 2:25 AM 4.4 ftL 8:02 AM 1.6 ftH 2:12 PM 5.2 ftL 8:48 PM -0.1 ft | 9:50 AM / 7:49 PM |
| Sun Oct 25 | H 3:17 AM 4.5 ftL 8:38 AM 2.0 ftH 2:39 PM 5.5 ftL 9:27 PM -0.7 ft | 9:52 AM / 7:47 PM |
| Mon Oct 26 | H 4:08 AM 4.6 ftL 9:14 AM 2.4 ftH 3:06 PM 5.7 ftL 10:08 PM -1.1 ft | 9:54 AM / 7:45 PM |
| Tue Oct 27 | H 5:01 AM 4.5 ftL 9:50 AM 2.8 ftH 3:33 PM 5.8 ftL 10:53 PM -1.4 ft | 9:56 AM / 7:42 PM |
| Wed Oct 28 | H 5:58 AM 4.3 ftL 10:28 AM 3.2 ftH 4:01 PM 5.8 ftL 11:41 PM -1.4 ft | 9:58 AM / 7:40 PM |
| Thu Oct 29 | H 7:00 AM 4.2 ftL 11:08 AM 3.5 ftH 4:34 PM 5.7 ft | 10:00 AM / 7:38 PM |
| Fri Oct 30 | L 12:35 AM -1.1 ftH 8:18 AM 4.0 ftL 11:59 AM 3.7 ftH 5:14 PM 5.4 ft | 10:02 AM / 7:36 PM |
| Sat Oct 31 | L 1:35 AM -0.8 ftH 10:38 AM 4.0 ftL 1:12 PM 3.8 ftH 6:10 PM 4.9 ft | 10:04 AM / 7:34 PM |
| Sun Nov 1 | L 1:41 AM -0.3 ftH 10:32 AM 4.2 ftL 1:56 PM 3.7 ftH 7:13 PM 4.3 ft | 9:06 AM / 6:32 PM |
| Mon Nov 2 | L 2:49 AM 0.1 ftH 11:04 AM 4.4 ftL 3:49 PM 3.1 ftH 8:57 PM 4.0 ft | 9:08 AM / 6:30 PM |
| Tue Nov 3 | L 3:53 AM 0.6 ftH 11:25 AM 4.6 ftL 5:10 PM 2.3 ftH 10:29 PM 3.8 ft | 9:10 AM / 6:28 PM |
| Wed Nov 4 | L 4:49 AM 1.0 ftH 11:42 AM 4.9 ftL 6:05 PM 1.5 ftH 11:55 PM 3.9 ft | 9:12 AM / 6:26 PM |
| Thu Nov 5 | L 5:37 AM 1.4 ftH 12:05 PM 5.1 ftL 6:48 PM 0.7 ft | 9:14 AM / 6:25 PM |
| Fri Nov 6 | H 1:07 AM 4.0 ftL 6:19 AM 1.9 ftH 12:32 PM 5.3 ftL 7:27 PM 0.1 ft | 9:16 AM / 6:23 PM |
| Sat Nov 7 | H 2:06 AM 4.1 ftL 6:58 AM 2.2 ftH 1:01 PM 5.4 ftL 8:02 PM -0.4 ft | 9:18 AM / 6:21 PM |
| Sun Nov 8 | H 2:56 AM 4.2 ftL 7:33 AM 2.6 ftH 1:30 PM 5.5 ftL 8:36 PM -0.6 ft | 9:20 AM / 6:19 PM |
| Mon Nov 9 | H 3:41 AM 4.2 ftL 8:06 AM 2.9 ftH 1:59 PM 5.4 ftL 9:09 PM -0.7 ft | 9:21 AM / 6:17 PM |
| Tue Nov 10 | H 4:23 AM 4.2 ftL 8:39 AM 3.1 ftH 2:25 PM 5.3 ftL 9:43 PM -0.7 ft | 9:23 AM / 6:16 PM |
Heights are in feet above mean lower low water (MLLW), the zero line on most US nautical charts. A minus height means the water drops below that line.
Fish in the waters around Udamat Bay, Sedanka Island
19 kinds of fish, sharks and rays have been recorded within 15 km (about 9 miles) of this spot, most often Sebastes variabilis, Atka Mackerel, Pacific Halibut. The bar shows how many records each has.
- Sebastes variabilisSalt water · 2 records
- Atka Mackerel Pleurogrammus monopterygiusSalt water · 2 records
- Pacific Halibut Hippoglossus stenolepisSalt water · 2 records
- Pacific Cod Gadus macrocephalusSalt water · 2 records
- Ribbed Sculpin Triglops pingeliiSalt water · 1 record
- Bigmouth Sculpin Hemitripterus boliniSalt water · 1 record
- Rougheye Rockfish Sebastes aleutianusSalt water · 1 record
- Northern Rockfish Sebastes polyspinisSalt water · 1 record
- Pacific Ocean Perch Sebastes alutusSalt water · 1 record
- Silvergray Rockfish Sebastes brevispinisSalt water · 1 record
- Microdisk Snailfish Careproctus ostentumSalt water · 1 record
- Prowfish Zaprora silenusSalt water · 1 record
- Dwarf Wrymouth Cryptacanthodes aleutensisSalt water · 1 record
- Pacific Sand Lance Ammodytes hexapterusSalt water · 1 record
- Longsnout Prickleback Lumpenella longirostrisSalt water · 1 record
- Arrowtooth Flounder Atheresthes stomiasSalt water · 1 record
- Eulachon Thaleichthys pacificusSalt water · 1 record
- Walleye Pollock Gadus chalcogrammusSalt water · 1 record
- Pacific Sandfish Trichodon trichodonSalt water · 1 record
Records from GBIF datasets released under CC0 or CC BY 4.0 (museum collections, surveys and community sightings). It shows what has been found here, not a complete list. Check your state rules before keeping fish.
About the tides at Udamat Bay, Sedanka Island
Udamat Bay, Sedanka Island gets two high tides and two low tides most days, but one high is clearly higher than the other (and one low clearly lower), which is called a mixed tide. Over the next month the water typically rises or falls about 3.3 ft between a high and the next low.
The biggest swings in this window come around Wednesday, October 28, when the day's range reaches 7.2 ft, and again around Monday, November 9 (6.1 ft). Here the biggest ranges depend on the moon's phase and on how far north or south of the equator it is, so they don't always line up with the new and full moon. The calmest day is Monday, October 19, with only 3.2 ft between the day's highest and lowest water.
The lowest tide of the month is -1.4 ft at 10:53 PM on Tuesday, October 27. There are 15 minus tides (lows below the chart's zero line) in this window: the best times for tide pools, clamming and walking the flats.
The highest predicted tide is 5.8 ft at 4:01 PM on Wednesday, October 28. Onshore wind or a storm can push the real water level above that.
This is a reference (harmonic) station: NOAA predicts its tides directly from years of measured water levels here, which makes it among the most reliable predictions on the coast.
Station details
- NOAA station ID: 9462645
- Type: reference (harmonic)
- Location: 53.8289, -166.2163
Nearby tide stations
- English Bay 7 mi
- Udagak Strait 7 mi
- Unalaska 14 mi
- Dutch Harbor, Amaknak Island 14 mi
- Kisselen Bay, Beaver Inlet 17 mi
- Broad Bight, Akutan Island 20 mi