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 | 7:14 AM | 3.74 ft |
| Low tide | 9:42 AM | 2.99 ft |
| High tide | 2:46 PM | 4.23 ft |
| Low tide | 11:15 PM | -0.93 ft |
| Day | High tides | Low tides |
|---|---|---|
| Today Tue, Oct 27 | 7:14 AM 3.7 ft2:46 PM 4.2 ft | 9:42 AM 3.0 ft11:15 PM -0.9 ft |
| Tomorrow Wed, Oct 28 | 8:09 AM 4.1 ft3:51 PM 4.4 ft | 11:17 AM 3.2 ft |
| Thu, Oct 29 | 8:51 AM 4.4 ft5:03 PM 4.4 ft | 12:12 AM -1.1 ft12:44 PM 3.2 ft |
| Fri, Oct 30 | 9:30 AM 4.5 ft6:15 PM 4.4 ft | 1:10 AM -1.2 ft2:00 PM 3.0 ft |
| Sat, Oct 31 | 10:08 AM 4.6 ft7:31 PM 4.2 ft | 2:07 AM -1.1 ft3:02 PM 2.7 ft |
| Sun, Nov 1 | 9:45 AM 4.6 ft7:48 PM 4.0 ft | 2:01 AM -0.9 ft3:01 PM 2.3 ft |
| Mon, Nov 2 | 10:22 AM 4.5 ft9:06 PM 3.6 ft | 2:52 AM -0.6 ft4:01 PM 1.8 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.
Herbert Island, west side is a subordinate station: NOAA computes its tides from Unalaska with fixed time and height corrections.
On Tuesday, October 27, high tide at Herbert Island, west side is at 7:14 AM (3.7 ft) and 2:46 PM (4.2 ft); low tide is at 9:42 AM (3.0 ft) and 11:15 PM (-0.9 ft) (AKDT, heights above MLLW). The table above lists the next 7 days.
The highest predicted tide in the next 12 months is 5.8 ft on December 23, 2026 at 12:11 PM. 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 -1.4 ft on June 6, 2027 at 11:18 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. Herbert Island, west side 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.