Sumner Island — AK, United States

Tide times & tide chart

2.2 ft1:40am9.7 ft8:50am5.4 ft2:13pm10.1 ft7:35pmNow
Tide predictions for Sumner Island, NOAA reference highs and lows, adjusted by published offsets. High 10.1 feet on Mon 19 Oct 2026 at 19:40, low 2.2 feet on Mon 19 Oct 2026 at 01:40, above MLLW, the chart datum.
↑7:36am↓5:42pm

Predictions are not observations — conditions vary with weather and river flow. Not for navigation.

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Tide times for the next 7 days

Mon 19 Oct 2026 through Sun 25 Oct 2026. All times are local to Sumner Island (America/Sitka). Heights are in feet above MLLW.
DayTideTimeHeight
Mon 19 Oct 2026Low2.2 ft
Mon 19 Oct 2026High9.7 ft
Mon 19 Oct 2026Low5.4 ft
Mon 19 Oct 2026High10.1 ft
Tue 20 Oct 2026Low2.1 ft
Tue 20 Oct 2026High10.2 ft
Tue 20 Oct 2026Low4.5 ft
Tue 20 Oct 2026High10.3 ft
Wed 21 Oct 2026Low1.9 ft
Wed 21 Oct 2026High10.8 ft
Wed 21 Oct 2026Low3.4 ft
Wed 21 Oct 2026High10.7 ft
Thu 22 Oct 2026Low1.7 ft
Thu 22 Oct 2026High11.6 ft
Thu 22 Oct 2026Low2.2 ft
Thu 22 Oct 2026High11.2 ft
Fri 23 Oct 2026Low1.6 ft
Fri 23 Oct 2026High12.3 ft
Fri 23 Oct 2026Low1.0 ft
Fri 23 Oct 2026High11.7 ft
Sat 24 Oct 2026Low1.7 ft
Sat 24 Oct 2026High13.1 ft
Sat 24 Oct 2026Low-0.1 ft
Sun 25 Oct 2026High12.1 ft
Sun 25 Oct 2026Low1.9 ft
Sun 25 Oct 2026High13.8 ft
Sun 25 Oct 2026Low-1.0 ft

Station facts

Position
56.4100° N, 133.7930° W
Time zone
America/Sitka
Datum
MLLW datum · NOAA reference highs and lows, adjusted by published offsets
Source
NOAA tide offsets from 9451600
Region
AK, United States

Heights are measured above chart datum. A negative height means there is that much less water than the charted depth shows.

Slackwater database (https://github.com/openwatersio/slackwater-database)

How we check predictions — dated samples and their limits.

Nearby

All tide stations