Castle Islands tide times

Duncan Canal, AKDuncan CanalNOAA 9451321Wednesday, September 30 · AKDTWed Sep 30Predictions onlyChange station
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Today at Castle Islands the next low tide is at 10:13 PM (−1.5 ft) and the next high tide is at 3:53 PM (17.3 ft). Tomorrow's first low is at 10:11 AM.

Predicted now
3.2 ft ↑
Rising 2.3 ft per hour
Next high
3:53 PM
In 5 h 14 min · 17.3 ft
Next low
10:13 PM
In 11 h 34 min · −1.5 ft
Tide range today
18.9 ft
Neap tides Friday
Predictions only. No live gauge at this station.

Today's tide

PredictedNightHeight above MLLW
−2 ft0 ft2 ft4 ft6 ft8 ft10 ft12 ft14 ft16 ft18 ftNOW 10:394:00 AMHigh · 15.2 ft9:29 AMLow · 1.8 ft3:53 PMHigh · 17.3 ft10:13 PMLow · −1.5 ft
Tide chart for Castle Islands, today. High 15.2 ft at 4:00 AM, low 1.8 ft at 9:29 AM, high 17.3 ft at 3:53 PM, low −1.5 ft at 10:13 PM.

Predicted tide height at Duncan Canal for Wednesday, September 30, in feet above Mean Lower Low Water (MLLW). Shaded areas are night.

Today's tides

ft above MLLW
  • High4:00 AM15.2 ft
  • Low9:29 AM1.8 ft
  • High3:53 PM17.3 ft
  • Low10:13 PM−1.5 ft
Tide times for Castle Islands
TideTimeHeight
High4:00 AM15.2 ft
Low9:29 AM1.8 ft
High3:53 PM17.3 ft
Low10:13 PM−1.5 ft
Sunrise
6:55 AM
First light 6:17
Sunset
6:32 PM
Last light 7:09
Moon
80%
Waning gibbous
Tide range
18.9 ft
Mean 13.4 ft

Best windows today

Plan the week →
  • Fishing
    6:00 to 10:00 PM

    Today's best window (7:00 to 8:00 AM) has passed. Dawn light with the outgoing tide around the 9:29 AM low.

  • Tidepools & shelling
    10:45 to 11:00 AM

    Today's best window (9:00 to 10:00 AM) has passed. The 1.8 ft low at 9:29 AM falls in full daylight. The tide returns fast here, so start heading back by 10:25 AM.

  • Surfing
    11:00 AM to 1:00 PM

    Mid tide from 11:00 AM to 1:00 PM. No wind sensor at this station.

  • Shallow boat launch
    Avoid 9:00 PM to 12:00 AM

    Under 1.5 ft around low water. Launch before 9:00 PM.

Plan the week

Moving water around the turn often fishes best. Local species and bait matter more than any chart.

Next 7 days

September calendar →
High and low tides for the next 7 days, heights in ft
DayTide 1Tide 2Tide 3Tide 4Range, ft
TodayWed 30H4:00a15.2L9:29a1.8H3:53p17.3L10:13p−1.518.9
ThuOct 1H4:49a14.0L10:11a3.2H4:35p16.3L11:04p−0.416.8
FriOct 2H5:49a12.6L11:00a4.6H5:30p15.110.5
SatOct 3L12:06a0.8H7:06a11.7L12:04p5.8H6:49p13.913.0
SunOct 4L1:25a1.8H8:34a11.6L1:36p6.5H8:23p13.411.5
MonOct 5L3:04a2.0H9:50a12.5L3:36p5.7H9:45p13.811.8
TueOct 6L4:26a1.4H10:48a13.9L4:57p3.9H10:51p14.713.3

Neap tides Friday. Smaller range, so highs and lows stay close to average. Spring and neap tides

Tide predictions and observations: NOAA National Ocean Service, Center for Operational Oceanographic Products and Services (CO-OPS), station 9451321.

Nearby stations

Currents

Spike Rock

  • Max flood1:22 AM 5.8 kn
  • Slack4:12 AM
  • Max ebb6:57 AM 5.2 kn
  • Slack10:08 AM
  • Max flood1:34 PM 5.1 kn
  • Slack4:17 PM
  • Max ebb7:11 PM 6.3 kn
  • Slack10:40 PM

Current predictions for Spike Rock, 7 mi away. Currents near inlets can be strong. Not for navigation.

Station details

Datum
Mean lower low water
Predictions
NOAA, from this station's own tide records
Live gauge
None
Coordinates
56.643° N, 133.152° W
Time zone
Alaska, UTC−8
Station ID
NOAA 9451321

About the tides at Castle Islands

Expect two roughly equal high tides a day at Duncan Canal, each arriving about 50 minutes later than the day before. Castle Islands sees a mean range of about 13.4 ft. Low tide can expose a wide area, and the return is fast. That is larger than most Alaska stations on this site. From the average lower low to the average higher high, the difference is 15.8 ft. Over the next two weeks the biggest daily range, 19.9 ft, comes on October 11, and the smallest, 10.5 ft, on Friday.

Predictions for Castle Islands come from this station's own tide records. There is no live sensor, so the table shows forecast only. NOAA measured the tide here from 1972 to 2024 to set up these predictions. The nearest other station is Beecher Pass, 7 mi away. For tidal currents, see Spike Rock.

Height unitsftmAdd this tide widget to your site. It's free.Week plannerPrintable September calendar

Tide predictions and water levels from NOAA CO-OPS. For planning only, not for navigation. Real water levels can differ because of wind, air pressure and river flow. Always check conditions on site.