Chowiet Island, Semidi Island tide chart
Alaska · NOAA station 9458519 · times in local time (HDT)
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Tides today, Sunday, October 11
- High 1:19 AM 8.8 ft
- Low 7:08 AM 1.6 ft
- High 1:08 PM 9.9 ft
- Low 7:43 PM -0.9 ft
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Sunrise 7:51 AM · Sunset 6:37 PM · New moon (0%)
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Fishing forecast
Hour by hour at Chowiet Island, Semidi IslandBest times
6:00 PM–7:00 PM and 2:00 PM–3:00 PM
New moon (0% lit)
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Weather and conditions at Chowiet Island, Semidi Island
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Marine forecast: Sitkinak to Castle Cape from 15 to 100 NM
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Marine radio: weather channels and VHF
To get alerts on a weather alert radio, program county code 002150 (Kodiak Island).
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 1:19 AM 8.8 ftL 7:08 AM 1.6 ftH 1:08 PM 9.9 ftL 7:43 PM -0.9 ft | 7:51 AM / 6:37 PM | New moon (0%) |
| Mon Oct 12 | H 1:59 AM 8.5 ftL 7:39 AM 2.1 ftH 1:37 PM 9.9 ftL 8:18 PM -0.9 ft | 7:53 AM / 6:35 PM | New moon (2%) |
| Tue Oct 13 | H 2:38 AM 8.2 ftL 8:09 AM 2.7 ftH 2:07 PM 9.6 ftL 8:53 PM -0.6 ft | 7:55 AM / 6:32 PM | Waxing crescent (7%) |
| Wed Oct 14 | H 3:17 AM 7.7 ftL 8:37 AM 3.2 ftH 2:37 PM 9.2 ftL 9:29 PM -0.2 ft | 7:57 AM / 6:30 PM | Waxing crescent (13%) |
| Thu Oct 15 | H 3:59 AM 7.1 ftL 9:06 AM 3.7 ftH 3:08 PM 8.7 ftL 10:09 PM 0.4 ft | 7:59 AM / 6:27 PM | Waxing crescent (21%) |
| Fri Oct 16 | H 4:48 AM 6.5 ftL 9:35 AM 4.2 ftH 3:43 PM 8.2 ftL 10:56 PM 1.0 ft | 8:01 AM / 6:25 PM | Waxing crescent (30%) |
| Sat Oct 17 | H 5:49 AM 6.1 ftL 10:10 AM 4.7 ftH 4:27 PM 7.6 ftL 11:58 PM 1.6 ft | 8:03 AM / 6:22 PM | First quarter (41%) |
Best fishing times at Chowiet Island, Semidi 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 | 85 · Excellent | 6:00 PM–7:00 PM, 2:00 PM–3:00 PM | 12:49 AM–2:49 AM, 1:12 PM–3:12 PM | 9:20 AM–10:20 AM, 5:50 PM–6:50 PM |
| Mon Oct 12 | 79 · Excellent | 6:00 PM–7:00 PM, 3:00 PM–4:00 PM | 1:35 AM–3:35 AM, 1:58 PM–3:58 PM | 10:45 AM–11:45 AM, 6:02 PM–7:02 PM |
| Tue Oct 13 | 72 · Good | 6:00 PM–7:00 PM, 4:00 PM–5:00 PM | 2:23 AM–4:23 AM, 2:47 PM–4:47 PM | 12:07 PM–1:07 PM, 6:20 PM–7:20 PM |
| Wed Oct 14 | 61 · Good | 4:00 PM–7:00 PM | 3:12 AM–5:12 AM, 3:37 PM–5:37 PM | 1:21 PM–2:21 PM, 6:49 PM–7:49 PM |
| Thu Oct 15 | 51 · Fair | 5:00 PM–6:00 PM | 4:02 AM–6:02 AM, 4:28 PM–6:28 PM | 2:22 PM–3:22 PM, 7:34 PM–8:34 PM |
| Fri Oct 16 | 44 · Fair | 6:00 PM–7:00 PM | 4:53 AM–6:53 AM, 5:19 PM–7:19 PM | 3:04 PM–4:04 PM, 8:37 PM–9:37 PM |
| Sat Oct 17 | 41 · Fair | 6:00 PM–8:00 PM | 5:43 AM–7:43 AM, 6:08 PM–8:08 PM | 3:32 PM–4:32 PM, 9:51 PM–10:51 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.
- -0.2 ft at 6:01 PM on Saturday, October 24
- 1.0 ft at 5:25 PM on Friday, October 23
- 2.2 ft at 4:47 PM on Thursday, October 22
- 2.7 ft at 8:09 AM on Tuesday, October 13
- 3.2 ft at 8:37 AM on Wednesday, October 14
- 3.3 ft at 4:06 PM on Wednesday, October 21
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 1:19 AM 8.8 ftL 7:08 AM 1.6 ftH 1:08 PM 9.9 ftL 7:43 PM -0.9 ft | 7:51 AM / 6:37 PM |
| Mon Oct 12 | H 1:59 AM 8.5 ftL 7:39 AM 2.1 ftH 1:37 PM 9.9 ftL 8:18 PM -0.9 ft | 7:53 AM / 6:35 PM |
| Tue Oct 13 | H 2:38 AM 8.2 ftL 8:09 AM 2.7 ftH 2:07 PM 9.6 ftL 8:53 PM -0.6 ft | 7:55 AM / 6:32 PM |
| Wed Oct 14 | H 3:17 AM 7.7 ftL 8:37 AM 3.2 ftH 2:37 PM 9.2 ftL 9:29 PM -0.2 ft | 7:57 AM / 6:30 PM |
| Thu Oct 15 | H 3:59 AM 7.1 ftL 9:06 AM 3.7 ftH 3:08 PM 8.7 ftL 10:09 PM 0.4 ft | 7:59 AM / 6:27 PM |
| Fri Oct 16 | H 4:48 AM 6.5 ftL 9:35 AM 4.2 ftH 3:43 PM 8.2 ftL 10:56 PM 1.0 ft | 8:01 AM / 6:25 PM |
| Sat Oct 17 | H 5:49 AM 6.1 ftL 10:10 AM 4.7 ftH 4:27 PM 7.6 ftL 11:58 PM 1.6 ft | 8:03 AM / 6:22 PM |
| Sun Oct 18 | H 7:06 AM 5.9 ftL 11:18 AM 5.1 ftH 5:36 PM 7.0 ft | 8:05 AM / 6:20 PM |
| Mon Oct 19 | L 1:16 AM 1.9 ftH 8:22 AM 6.1 ftL 1:38 PM 5.0 ftH 7:11 PM 6.7 ft | 8:07 AM / 6:17 PM |
| Tue Oct 20 | L 2:30 AM 1.9 ftH 9:19 AM 6.6 ftL 3:11 PM 4.3 ftH 8:36 PM 6.8 ft | 8:09 AM / 6:15 PM |
| Wed Oct 21 | L 3:27 AM 1.8 ftH 9:59 AM 7.2 ftL 4:06 PM 3.3 ftH 9:46 PM 7.1 ft | 8:11 AM / 6:12 PM |
| Thu Oct 22 | L 4:12 AM 1.7 ftH 10:31 AM 8.0 ftL 4:47 PM 2.2 ftH 10:43 PM 7.7 ft | 8:13 AM / 6:10 PM |
| Fri Oct 23 | L 4:50 AM 1.7 ftH 11:02 AM 8.7 ftL 5:25 PM 1.0 ftH 11:31 PM 8.2 ft | 8:16 AM / 6:08 PM |
| Sat Oct 24 | L 5:25 AM 1.7 ftH 11:32 AM 9.4 ftL 6:01 PM -0.2 ft | 8:18 AM / 6:05 PM |
| Sun Oct 25 | H 12:16 AM 8.5 ftL 6:00 AM 1.9 ftH 12:04 PM 10.0 ftL 6:39 PM -1.1 ft | 8:20 AM / 6:03 PM |
| Mon Oct 26 | H 1:00 AM 8.8 ftL 6:35 AM 2.1 ftH 12:36 PM 10.5 ftL 7:19 PM -1.8 ft | 8:22 AM / 6:01 PM |
| Tue Oct 27 | H 1:45 AM 8.7 ftL 7:10 AM 2.5 ftH 1:12 PM 10.8 ftL 8:01 PM -2.1 ft | 8:24 AM / 5:58 PM |
| Wed Oct 28 | H 2:31 AM 8.5 ftL 7:48 AM 2.9 ftH 1:49 PM 10.8 ftL 8:46 PM -2.1 ft | 8:26 AM / 5:56 PM |
| Thu Oct 29 | H 3:20 AM 8.0 ftL 8:28 AM 3.3 ftH 2:31 PM 10.5 ftL 9:35 PM -1.7 ft | 8:28 AM / 5:54 PM |
| Fri Oct 30 | H 4:14 AM 7.5 ftL 9:14 AM 3.8 ftH 3:19 PM 9.9 ftL 10:29 PM -1.0 ft | 8:31 AM / 5:52 PM |
| Sat Oct 31 | H 5:16 AM 7.1 ftL 10:11 AM 4.2 ftH 4:16 PM 9.1 ftL 11:32 PM -0.2 ft | 8:33 AM / 5:49 PM |
| Sun Nov 1 | H 6:28 AM 6.9 ftL 11:32 AM 4.5 ftH 5:30 PM 8.2 ft | 7:35 AM / 4:47 PM |
| Mon Nov 2 | L 12:46 AM 0.6 ftH 7:40 AM 7.1 ftL 1:21 PM 4.3 ftH 7:01 PM 7.5 ft | 7:37 AM / 4:45 PM |
| Tue Nov 3 | L 2:01 AM 1.1 ftH 8:43 AM 7.6 ftL 2:56 PM 3.4 ftH 8:31 PM 7.2 ft | 7:39 AM / 4:43 PM |
| Wed Nov 4 | L 3:06 AM 1.5 ftH 9:34 AM 8.2 ftL 4:03 PM 2.2 ftH 9:50 PM 7.3 ft | 7:41 AM / 4:41 PM |
| Thu Nov 5 | L 4:01 AM 1.8 ftH 10:16 AM 8.8 ftL 4:54 PM 1.1 ftH 10:54 PM 7.6 ft | 7:43 AM / 4:39 PM |
| Fri Nov 6 | L 4:47 AM 2.1 ftH 10:54 AM 9.3 ftL 5:36 PM 0.1 ftH 11:46 PM 7.8 ft | 7:46 AM / 4:37 PM |
| Sat Nov 7 | L 5:27 AM 2.4 ftH 11:28 AM 9.7 ftL 6:13 PM -0.6 ft | 7:48 AM / 4:35 PM |
| Sun Nov 8 | H 12:30 AM 8.0 ftL 6:02 AM 2.7 ftH 12:00 PM 9.9 ftL 6:49 PM -1.0 ft | 7:50 AM / 4:33 PM |
| Mon Nov 9 | H 1:09 AM 8.1 ftL 6:36 AM 3.0 ftH 12:32 PM 9.9 ftL 7:23 PM -1.1 ft | 7:52 AM / 4:31 PM |
| Tue Nov 10 | H 1:47 AM 8.0 ftL 7:09 AM 3.3 ftH 1:03 PM 9.8 ftL 7:57 PM -1.1 ft | 7:54 AM / 4:29 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 Chowiet Island, Semidi Island
40 kinds of fish, sharks and rays have been recorded within 15 km (about 9 miles) of this spot, most often Walleye Pollock, Flathead Sole, Pacific Sand Lance. The bar shows how many records each has.
- Walleye Pollock Gadus chalcogrammusSalt water · 63 records
- Flathead Sole Hippoglossoides elassodonSalt water · 53 records
- Pacific Sand Lance Ammodytes hexapterusSalt water · 34 records
- Pacific Cod Gadus macrocephalusSalt water · 21 records
- Kelp Greenling Hexagrammos decagrammusSalt water · 18 records
- Northern Ronquil Ronquilus jordaniSalt water · 16 records
- Northern Rock Sole Lepidopsetta polyxystraSalt water · 15 records
- Dover Sole Microstomus pacificusSalt water · 15 records
- Rex Sole Glyptocephalus zachirusSalt water · 14 records
- Northern Sculpin Icelinus borealisSalt water · 13 records
- Ribbed Sculpin Triglops pingeliiSalt water · 12 records
- Rock Sole Lepidopsetta bilineataSalt water · 12 records
- Great Sculpin Myoxocephalus polyacanthocephalusSalt water · 11 records
- Gray Starsnout Bathyagonus alascanusSalt water · 11 records
- Northern Lampfish Stenobrachius leucopsarusSalt water · 11 records
- Armorhead Sculpin Gymnocanthus galeatusSalt water · 10 records
- Yellow Irish Lord Hemilepidotus jordaniSalt water · 9 records
- Prowfish Zaprora silenusSalt water · 7 records
- Arrowtooth Flounder Atheresthes stomiasSalt water · 7 records
- Pacific Halibut Hippoglossus stenolepisSalt water · 7 records
- Capelin Mallotus villosusSalt water · 7 records
- Searcher Bathymaster signatusSalt water · 6 records
- Slim Sculpin Radulinus asprellusSalt water · 5 records
- Fourhorn Poacher Hypsagonus quadricornisSalt water · 5 records
- Daubed Shanny Leptoclinus maculatusSalt water · 5 records
- Darter Sculpin Radulinus boleoidesSalt water · 4 records
- Dwarf Wrymouth Cryptacanthodes aleutensisSalt water · 4 records
- Leister Sculpin Enophrys lucasiSalt water · 4 records
- Puget Sound Sculpin Ruscarius meanyiSalt water · 3 records
- Longfin Irish Lord Hemilepidotus zapusSalt water · 3 records
- Red Irish Lord Hemilepidotus hemilepidotusSalt water · 3 records
- Roughspine Sculpin Triglops macellusSalt water · 3 records
- Sturgeon Poacher Podothecus accipenserinusSalt water · 3 records
- Starry Flounder Platichthys stellatusSalt water · 3 records
- Slender Blacksmelt Bathylagus pacificusSalt water · 3 records
- Polka-dot Snailfish Liparis gibbusSalt water · 3 records
- Alaska Plaice Pleuronectes quadrituberculatusSalt water · 3 records
- Smooth Lumpsucker Aptocyclus ventricosusSalt water · 2 records
- Deepsea Sole Embassichthys bathybiusSalt water · 2 records
- Showy Snailfish Liparis pulchellusSalt water · 2 records
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 Chowiet Island, Semidi Island
Chowiet Island, Semidi Island gets two high tides and two low tides almost every day, and the two highs are close in height. Over the next month the water typically rises or falls about 6.7 ft between a high and the next low.
The biggest swings in this window come around Tuesday, October 27, when the day's range reaches 12.9 ft, and again around Monday, November 9 (11.1 ft). Those spring tides follow the new and full moon by a day or two. The calmest day is Monday, October 19, with only 4.8 ft between the day's highest and lowest water.
The lowest tide of the month is -2.1 ft at 8:01 PM on Tuesday, October 27. There are 16 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 10.8 ft at 1:12 PM on Tuesday, October 27. 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: 9458519
- Type: reference (harmonic)
- Location: 56.0517, -156.6980