Seal Cape, Coal Bay tide predictions
55.3650, -161.3250 · NOAA station 9459643
Full daylight calendar for the Unalaska / Dutch Harbor area → Alaska Daylight · Northern lights forecast for Unalaska / Dutch Harbor → Alaska Aurora Forecast
Nearest buoy: Shumagin Islands · 102 mi S — 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 Seal Cape, Coal Bay from the SAND POINT, POPOF ISLAND station: high tides about the same height, at the same time; low tides about 1.05× the height, 5 min later.
Ranges shrink as you head down the chain, but the passes between islands rip hard on the change, and weather calls the shots year-round. Wind can hold water in or blow it out far beyond what the table says.
2027 tide extremes
Highest predicted high tide: 9.1 ft — Fri Jan 22 · 1:38 PM
Lowest predicted low tide: -2.8 ft — Sun Jul 4 · 9:42 AM
Biggest single-day swing: 11.0 ft on Sun Jul 4
Best daytime minus tides of 2027
| Date | Low tide | Height |
|---|---|---|
| Sun Jul 4 | 9:42 AM | -2.8 ft |
| Mon Jul 5 | 10:26 AM | -2.8 ft |
| Sun Jun 6 | 10:40 AM | -2.7 ft |
| Sat Jun 5 | 9:54 AM | -2.7 ft |
| Sat Jul 3 | 8:57 AM | -2.5 ft |
| Mon Jun 7 | 11:28 AM | -2.5 ft |
| Tue Jul 6 | 11:09 AM | -2.4 ft |
| Fri Jun 4 | 9:09 AM | -2.4 ft |
| Mon Aug 2 | 9:23 AM | -2.3 ft |
| Sun Aug 1 | 8:41 AM | -2.2 ft |
178 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
- Ukolnoi Island · 11.1 mi SW
- Beaver Bay · 20.4 mi E
- Dolgoi Harbor, Dolgoi Island · 24.9 mi SW
- Zachary Bay, Unga Island · 27.9 mi E
- Albatross Anchorage, Balboa Bay · 31.9 mi NE