Heights in feet above Mean Lower Low Water (MLLW). Dots are NOAA's predicted highs and lows; the line between them is our interpolation. Shaded: night.
| Tide | Time | Height |
|---|---|---|
| High tide | 6:24 AM | 5.09 ft |
| Low tide | 8:48 AM | 3.82 ft |
| High tide | 1:56 PM | 5.75 ft |
| Low tide | 10:21 PM | -1.19 ft |
| Day | High tides | Low tides |
|---|---|---|
| Today Tue, Oct 27 | 6:24 AM 5.1 ft1:56 PM 5.8 ft | 8:48 AM 3.8 ft10:21 PM -1.2 ft |
| Tomorrow Wed, Oct 28 | 7:19 AM 5.6 ft3:01 PM 5.9 ft | 10:23 AM 4.1 ft11:18 PM -1.4 ft |
| Thu, Oct 29 | 8:01 AM 5.9 ft4:13 PM 6.0 ft | 11:50 AM 4.1 ft |
| Fri, Oct 30 | 8:40 AM 6.1 ft5:25 PM 5.9 ft | 12:16 AM -1.5 ft1:06 PM 3.9 ft |
| Sat, Oct 31 | 9:18 AM 6.2 ft6:41 PM 5.7 ft | 1:13 AM -1.4 ft2:08 PM 3.5 ft |
| Sun, Nov 1 | 8:55 AM 6.2 ft6:58 PM 5.4 ft | 1:07 AM -1.1 ft2:07 PM 2.9 ft |
| Mon, Nov 2 | 9:32 AM 6.1 ft8:16 PM 4.9 ft | 1:58 AM -0.7 ft3:07 PM 2.3 ft |
Orange: measured by NOAA's sensor, last 24 hours (6-minute data, preliminary). Dashed: predicted tide, through the next 24 hours. The prediction contains only the astronomical tide; wind, air pressure and river flow move the real water level away from it.
Usof Bay is a subordinate station: NOAA computes its tides from Unalaska with fixed time and height corrections.
On Tuesday, October 27, high tide at Usof Bay is at 6:24 AM (5.1 ft) and 1:56 PM (5.8 ft); low tide is at 8:48 AM (3.8 ft) and 10:21 PM (-1.2 ft) (AKDT, heights above MLLW). The table above lists the next 7 days.
The highest predicted tide in the next 12 months is 7.9 ft on December 23, 2026 at 11:21 AM. The largest tides fall a day or two after a full or new moon, especially when the Moon is closest to Earth.
Yes — on 214 days in the next 12 months the low tide drops below 0 ft (MLLW). The lowest is -1.8 ft on June 6, 2027 at 10:24 AM. Minus tides expose the most shoreline, which is why tide-poolers look for them.
Station local time (AKDT at the time this page was built), with daylight saving time applied where the area observes it — the same convention as NOAA's own tide tables.
From NOAA CO-OPS, the U.S. government tide station network (tidesandcurrents.noaa.gov); the predictions are public domain. Usof Bay is a subordinate station: NOAA derives its times and heights from the reference station Unalaska with fixed corrections. The curve between highs and lows is our interpolation. This page is not for navigation.