Castle Islands, Duncan Canal, AK Tide Chart Today & Tomorrow

NOAA tide station 9451321 · Alaska · updated Nov 12, 2026

Fri, Nov 13: High tide 3:15 AM (13.6 ft) and 2:49 PM (15.2 ft); low tide 8:25 AM (4.9 ft) and 9:10 PM (0.6 ft).

Tide todayHigh 3:15 AM · High 2:49 PMLow 8:25 AM · Low 9:10 PM

Today's range14.6 ft0.6 → 15.2 ft (MLLW)

Wind (forecast)Loading…

Sun7:28 AM – 3:44 PMFirst light 6:45 AM · Last light 4:27 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

YesterdayThu, Nov 12

High 2:34 AM 14.4 ft
Low 7:49 AM 4.2 ft
High 2:13 PM 16.1 ft
Low 8:31 PM -0.2 ft

First light 6:43 AMSunrise 7:26 AMSunset 3:46 PMLast light 4:29 PM

TodayFri, Nov 13

High 3:15 AM 13.6 ft
Low 8:25 AM 4.9 ft
High 2:49 PM 15.2 ft
Low 9:10 PM 0.6 ft

First light 6:45 AMSunrise 7:28 AMSunset 3:44 PMLast light 4:27 PM

TomorrowSat, Nov 14

High 4:00 AM 12.8 ft
Low 9:06 AM 5.6 ft
High 3:28 PM 14.1 ft
Low 9:53 PM 1.5 ft

First light 6:47 AMSunrise 7:31 AMSunset 3:42 PMLast light 4:26 PM

SundaySun, Nov 15

High 4:52 AM 12.2 ft
Low 9:56 AM 6.2 ft
High 4:16 PM 12.9 ft
Low 10:42 PM 2.3 ft

First light 6:49 AMSunrise 7:33 AMSunset 3:40 PMLast light 4:24 PM

MondayMon, Nov 16

High 5:53 AM 11.9 ft
Low 10:57 AM 6.6 ft
High 5:24 PM 11.9 ft
Low 11:36 PM 2.9 ft

First light 6:51 AMSunrise 7:35 AMSunset 3:38 PMLast light 4:23 PM

Best fishing times today in Castle Islands, Duncan Canal

Today is a good fishing day (solunar + tide)

7/10

Waxing crescent · 17% lit · Full moon Tue, Nov 24

Major fishing times

Moon underfoot1:56 am – 3:56 am
↻ Tide change: high 3:15 am
Moon overhead2:21 pm – 4:21 pm
Sunset↻ Tide change: high 2:49 pm

Minor fishing times

Moonrise12:01 pm – 1:01 pm
≈ Moving water, rising
Moonset5:47 pm – 6:47 pm
≈ Moving water, falling

Fishing times for the next 7 days

TodayNov 13	7/10Good	Major 1:56 am – 3:56 am · 2:21 pm – 4:21 pm Minor 12:01 pm – 1:01 pm · 5:47 pm – 6:47 pm
SatNov 14	7/10Good	Major 2:46 am – 4:46 am · 3:10 pm – 5:10 pm Minor 12:23 pm – 1:23 pm · 7:06 pm – 8:06 pm
SunNov 15	7/10Good	Major 3:33 am – 5:33 am · 3:56 pm – 5:56 pm Minor 12:36 pm – 1:36 pm · 8:27 pm – 9:27 pm
MonNov 16	5/10Fair	Major 4:18 am – 6:18 am · 4:40 pm – 6:40 pm Minor 12:46 pm – 1:46 pm · 9:48 pm – 10:48 pm
TueNov 17	7/10Good	Major 5:02 am – 7:02 am · 5:23 pm – 7:23 pm Minor 12:53 pm – 1:53 pm · 11:09 pm – 12:09 am
WedNov 18	6/10Good	Major 5:44 am – 7:44 am · 6:06 pm – 8:06 pm Minor 12:59 pm – 1:59 pm
ThuNov 19	3/10Poor	Major 6:27 am – 8:27 am · 6:49 pm – 8:49 pm Minor 12:31 am – 1:31 am · 1:04 pm – 2:04 pm

How this rating works

Solunar theory says fish feed more when the moon is overhead or underfoot (major periods, about 2 hours) and around moonrise and moonset (minor periods, about 1 hour). We score each day from 1 to 10 by checking when those periods happen, using the NOAA tide predictions for station 9451321 and the sun times for this spot:

Base	every day starts at 1	1
Sunrise / sunset	a period overlaps sunrise or sunset ±1 h: major +2, minor +1 (max 3) (Moon overhead × sunset +2)	2
Tide	a NOAA high or low falls inside a period (tide change): major +2, minor +1; moving water during a major period (no high/low within 1 h of it) +1 (max 4) (Moon underfoot – tide change +2; Moon overhead – tide change +2)	4
Moon phase	within 2 days of a new or full moon +2, within 4 days +1 (today: 4.4 days)	0
Today	7, rounded	7/10

1–3 poor · 4–5 fair · 6–7 good · 8–10 excellent. Solunar times are a rule of thumb, not a guarantee: weather, water temperature and bait matter a lot. Tide changes and moving water are specific to this station, so nearby spots can score differently.

Solunar periods calculated for 56.64, -133.15 (moon times from astronomical equations, local time). Not a fishing forecast.

Best fishing times today in Castle Islands, Duncan Canal

Today is a good fishing day (solunar + tide)

7/10

Waxing crescent · 11% lit · Full moon Tue, Nov 24

Major fishing times

Moon underfoot1:05 am – 3:05 am
Moon overhead1:31 pm – 3:31 pm
Sunset↻ Tide change: high 2:13 pm

Minor fishing times

Moonrise11:27 am – 12:27 pm
≈ Moving water, rising
Moonset4:38 pm – 5:38 pm
Sunset≈ Moving water, falling

Fishing times for the next 7 days

TodayNov 12	7/10Good	Major 1:05 am – 3:05 am · 1:31 pm – 3:31 pm Minor 11:27 am – 12:27 pm · 4:38 pm – 5:38 pm
FriNov 13	7/10Good	Major 1:56 am – 3:56 am · 2:21 pm – 4:21 pm Minor 12:01 pm – 1:01 pm · 5:47 pm – 6:47 pm
SatNov 14	7/10Good	Major 2:46 am – 4:46 am · 3:10 pm – 5:10 pm Minor 12:23 pm – 1:23 pm · 7:06 pm – 8:06 pm
SunNov 15	7/10Good	Major 3:33 am – 5:33 am · 3:56 pm – 5:56 pm Minor 12:36 pm – 1:36 pm · 8:27 pm – 9:27 pm
MonNov 16	5/10Fair	Major 4:18 am – 6:18 am · 4:40 pm – 6:40 pm Minor 12:46 pm – 1:46 pm · 9:48 pm – 10:48 pm
TueNov 17	7/10Good	Major 5:02 am – 7:02 am · 5:23 pm – 7:23 pm Minor 12:53 pm – 1:53 pm · 11:09 pm – 12:09 am
WedNov 18	6/10Good	Major 5:44 am – 7:44 am · 6:06 pm – 8:06 pm Minor 12:59 pm – 1:59 pm

How this rating works

Base	every day starts at 1	1
Sunrise / sunset	a period overlaps sunrise or sunset ±1 h: major +2, minor +1 (max 3) (Moon overhead × sunset +2; Moonset × sunset +1)	3
Tide	a NOAA high or low falls inside a period (tide change): major +2, minor +1; moving water during a major period (no high/low within 1 h of it) +1 (max 4) (Moon overhead – tide change +2)	2
Moon phase	within 2 days of a new or full moon +2, within 4 days +1 (today: 3.4 days)	1
Today	7, rounded	7/10

Solunar periods calculated for 56.64, -133.15 (moon times from astronomical equations, local time). Not a fishing forecast.

Castle Islands, Duncan Canal tide table — next 7 days

Thu, Nov 12	High 2:34 AM 14.36 ft	Low 7:49 AM 4.24 ft	High 2:13 PM 16.14 ft	Low 8:31 PM -0.21 ft
Fri, Nov 13	High 3:15 AM 13.62 ft	Low 8:25 AM 4.93 ft	High 2:49 PM 15.18 ft	Low 9:10 PM 0.62 ft
Sat, Nov 14	High 4:00 AM 12.84 ft	Low 9:06 AM 5.63 ft	High 3:28 PM 14.07 ft	Low 9:53 PM 1.48 ft
Sun, Nov 15	High 4:52 AM 12.18 ft	Low 9:56 AM 6.23 ft	High 4:16 PM 12.91 ft	Low 10:42 PM 2.28 ft
Mon, Nov 16	High 5:53 AM 11.86 ft	Low 10:57 AM 6.58 ft	High 5:24 PM 11.89 ft	Low 11:36 PM 2.94 ft
Tue, Nov 17	High 6:56 AM 12.04 ft	Low 12:11 PM 6.46 ft	High 6:45 PM 11.38 ft
Wed, Nov 18	Low 12:37 AM 3.39 ft	High 7:53 AM 12.71 ft	Low 1:34 PM 5.63 ft	High 8:00 PM 11.57 ft
Thu, Nov 19	Low 1:42 AM 3.54 ft	High 8:42 AM 13.71 ft	Low 2:46 PM 4.12 ft	High 9:02 PM 12.27 ft
Fri, Nov 20	Low 2:42 AM 3.41 ft	High 9:24 AM 14.88 ft	Low 3:40 PM 2.26 ft	High 9:57 PM 13.22 ft

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

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About the tide at Castle Islands, Duncan Canal

It is a harmonic reference station (predicted directly from its own tidal constituents).

Castle Islands, Duncan Canal has a semidiurnal tide: two high tides and two low tides of similar height each day. The average rise or fall between high and low tide is 13.0 ft, growing to about 20.2 ft at spring tides (around new and full moon) and shrinking to about 10.0 ft at neap tides (around the quarter moons). The highest tide predicted in the next 12 months is 19.4 ft on December 24, 2026 at 12:42 PM; the lowest is -4.2 ft on July 5, 2027 at 8:35 AM, and 201 low tides in that period drop below zero (MLLW).

Tide type: Semidiurnal
Mean range: 13.0 ft
Spring / neap range: 20.2 ft / 10.0 ft
Average higher high: 15.6 ft
Average lower low: 0.2 ft
Highest tide, next 12 months: 19.4 ft · Dec 24, 2026
Lowest tide, next 12 months: -4.2 ft · Jul 5, 2027
Negative low tides (12 months): 201

This week

From Fri, Nov 13 to Thu, Nov 19, high tides at Castle Islands, Duncan Canal range from 11.4 ft to 15.2 ft; the biggest is on Fri, Nov 13 at 2:49 PM. The lowest low is 0.6 ft on Fri, Nov 13 at 9:10 PM. Low tides in daylight (sunrise to sunset): Fri 8:25 AM (4.9 ft); Sat 9:06 AM (5.6 ft); Sun 9:56 AM (6.2 ft); Mon 10:57 AM (6.6 ft); Tue 12:11 PM (6.5 ft); Wed 1:34 PM (5.6 ft); Thu 2:46 PM (4.1 ft).

Tide statistics computed from NOAA high/low predictions for Oct 2026 – Oct 2027; heights in feet above MLLW. Predictions are astronomical and do not include weather.

Gear for Castle Islands, Duncan Canal

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Nearby tide stations

Beecher Pass, AK 7.1 mi southeast
Anchor Point, AK 8.6 mi east
Papke's Landing, AK 8.6 mi east
Point Lockwood, Woewodski Island, AK 9.3 mi southeast
Turn Point, AK 12.6 mi northeast
Petersburg, AK 14.0 mi northeast
Cosmos Point, AK 20.4 mi east
Dry Strait, AK 22.0 mi east

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 Fri, Nov 13, predicted high tide at Castle Islands, Duncan Canal, AK is at 3:15 AM, 2:49 PM local time.

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

On Fri, Nov 13, predicted low tide at Castle Islands, Duncan Canal, AK is at 8:25 AM, 9:10 PM local time.

When are high and low tide tomorrow at Castle Islands, Duncan Canal, AK?

On Sat, Nov 14, predicted high tides are at 4:00 AM (12.8 ft) and 3:28 PM (14.1 ft); low tides are at 9:06 AM (5.6 ft) and 9:53 PM (1.5 ft) (local time).

What is the tide range at Castle Islands, Duncan Canal, AK?

The average range between high and low tide is 13.0 ft; about 20.2 ft at spring tides and 10.0 ft at neap tides. The highest tide predicted in the next 12 months is 19.4 ft on December 24, 2026 (NOAA predictions, MLLW).

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).