Zachary Bay, Unga Island tide predictions
55.3350, -160.6170 · NOAA station 9459465
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 · 97 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
Zachary Bay, Unga Island is one of NOAA's reference tide stations — its predictions are computed directly from harmonic analysis of water levels observed here, and other nearby stations are calculated from it.
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: 9.4 ft — Fri Jan 22 · 1:45 PM
Lowest predicted low tide: -2.7 ft — Sun Jul 4 · 9:40 AM
Biggest single-day swing: 11.3 ft on Sun Jul 4
Best daytime minus tides of 2027
| Date | Low tide | Height |
|---|---|---|
| Sun Jul 4 | 9:40 AM | -2.7 ft |
| Mon Jul 5 | 10:24 AM | -2.7 ft |
| Sun Jun 6 | 10:37 AM | -2.7 ft |
| Sat Jun 5 | 9:51 AM | -2.6 ft |
| Sat Jul 3 | 8:54 AM | -2.5 ft |
| Mon Jun 7 | 11:24 AM | -2.4 ft |
| Fri Jun 4 | 9:06 AM | -2.3 ft |
| Tue Jul 6 | 11:08 AM | -2.3 ft |
| Mon Aug 2 | 9:22 AM | -2.3 ft |
| Sun Aug 1 | 8:39 AM | -2.1 ft |
175 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
- SAND POINT, POPOF ISLAND · 4.4 mi E
- Pirate Cove, Popof Island · 10.3 mi E
- Beaver Bay · 13.0 mi NW
- Albatross Anchorage, Balboa Bay · 17.6 mi N
- Sanborn Harbor, Nagai Island · 27.5 mi SE