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 | 1:55 AM | 12.37 ft |
| Low tide | 7:31 AM | 2.66 ft |
| High tide | 1:25 PM | 14.67 ft |
| Low tide | 8:20 PM | -1.94 ft |
| Day | High tides | Low tides |
|---|---|---|
| Today Tue, Oct 27 | 1:55 AM 12.4 ft1:25 PM 14.7 ft | 7:31 AM 2.7 ft8:20 PM -1.9 ft |
| Tomorrow Wed, Oct 28 | 2:42 AM 12.2 ft2:04 PM 14.6 ft | 8:11 AM 3.2 ft9:06 PM -1.8 ft |
| Thu, Oct 29 | 3:32 AM 11.8 ft2:48 PM 14.2 ft | 8:55 AM 3.7 ft9:55 PM -1.4 ft |
| Fri, Oct 30 | 4:28 AM 11.3 ft3:37 PM 13.5 ft | 9:45 AM 4.2 ft10:51 PM -0.7 ft |
| Sat, Oct 31 | 5:33 AM 10.9 ft4:37 PM 12.6 ft | 10:47 AM 4.7 ft11:55 PM 0.1 ft |
| Sun, Nov 1 | 5:47 AM 10.8 ft4:53 PM 11.7 ft | 11:10 AM 4.9 ft |
| Mon, Nov 2 | 7:00 AM 11.0 ft6:24 PM 11.0 ft | 12:07 AM 0.7 ft12:50 PM 4.5 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.
Sumner Island is a subordinate station: NOAA computes its tides from Sitka with fixed time and height corrections.
On Tuesday, October 27, high tide at Sumner Island is at 1:55 AM (12.4 ft) and 1:25 PM (14.7 ft); low tide is at 7:31 AM (2.7 ft) and 8:20 PM (-1.9 ft) (AKDT, heights above MLLW). The table above lists the next 7 days.
The highest predicted tide in the next 12 months is 15.2 ft on December 24, 2026 at 11:53 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 172 days in the next 12 months the low tide drops below 0 ft (MLLW). The lowest is -3.2 ft on July 5, 2027 at 8:25 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. Sumner Island is a subordinate station: NOAA derives its times and heights from the reference station Sitka with fixed corrections. The curve between highs and lows is our interpolation. This page is not for navigation.