Kelp Island Passage, Duke Island tide predictions
54.8767, -131.3000 · NOAA station 9450142
Full daylight calendar for the Ketchikan area → Alaska Daylight · Northern lights forecast for Ketchikan → Alaska Aurora Forecast
Nearest buoy: Central Dixon Entrance Buoy · 57 mi SW — live wind & wave reports
Tide now
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48-hour outlook
Drag across the curve to inspect any time. Weather icons show the forecast at each high tide.
Drawn from the high/low predictions — NOAA publishes high/low only for this station.
7-day tides
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H = high tide · L = low tide
About this station
NOAA builds the predictions for Kelp Island Passage, Duke Island from the Ketchikan station: high tides about 0.94× the height, 4 min earlier; low tides about 0.96× the height, 3 min later.
Inside Passage waters are sheltered, but the ranges are real: 15 to 20 ft swings are routine, and narrow channels run strong tidal currents on the change. Out here, rain and channel weather matter more than ice.
2027 tide extremes
Highest predicted high tide: 17.9 ft — Sat Jan 23 · 12:59 PM
Lowest predicted low tide: -4.2 ft — Mon Jul 5 · 8:27 AM
Biggest single-day swing: 21.6 ft on Sat Jan 23
Best daytime minus tides of 2027
| Date | Low tide | Height |
|---|---|---|
| Mon Jul 5 | 8:27 AM | -4.2 ft |
| Tue Aug 3 | 8:07 AM | -4.0 ft |
| Tue Jul 6 | 9:11 AM | -3.9 ft |
| Sun Jul 4 | 7:41 AM | -3.8 ft |
| Fri Jan 22 | 6:49 PM | -3.8 ft |
| Sun Jun 6 | 8:40 AM | -3.7 ft |
| Mon Aug 2 | 7:25 AM | -3.7 ft |
| Wed Aug 4 | 8:48 AM | -3.6 ft |
| Sat Jun 5 | 7:54 AM | -3.5 ft |
| Mon Jun 7 | 9:27 AM | -3.5 ft |
199 minus tides (below 0 ft) are predicted here in 2027. The table shows up to the 10 lowest that fall between 7 AM and 7 PM — the ones worth planning a clam dig or tidepool walk around.
Nearest tide stations
- Morse Cove, Duke Island · 3.5 mi NE
- Custom House Cove, Mary Island · 15.8 mi N
- Tamgas Harbor, Annette Island · 16.3 mi NW
- Kah Shakes Cove · 17.1 mi NE
- Metlakatla, Port Chester · 20.4 mi NW