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Portage Bay, Kupreanof Island tide times

Alaska · NOAA station TWC1663 · times in local time
Tuesday, October 27: high tide 2:05 AM (16.1 ft) and 1:53 PM (18.9 ft); low tide 7:53 AM (1.8 ft) and 8:29 PM (-3.4 ft).
next high tide
2:05 AM
16.1 ft
next low tide
7:53 AM
1.8 ft
moon
–
 

Tide chart — today, Tue, Oct 27

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.

TideTimeHeight
High tide2:05 AM16.08 ft
Low tide7:53 AM1.78 ft
High tide1:53 PM18.88 ft
Low tide8:29 PM-3.38 ft

Portage Bay, Kupreanof Island tide table — next 7 days

DayHigh tidesLow tides
Today
Tue, Oct 27		2:05 AM 16.1 ft1:53 PM 18.9 ft7:53 AM 1.8 ft8:29 PM -3.4 ft
Tomorrow
Wed, Oct 28		2:50 AM 15.7 ft2:33 PM 18.7 ft8:34 AM 2.5 ft9:13 PM -3.0 ft
Thu, Oct 293:37 AM 15.0 ft3:17 PM 17.9 ft9:18 AM 3.4 ft10:01 PM -2.1 ft
Fri, Oct 304:30 AM 14.1 ft4:07 PM 16.7 ft10:08 AM 4.5 ft10:55 PM -0.8 ft
Sat, Oct 315:33 AM 13.1 ft5:07 PM 15.3 ft11:09 AM 5.5 ft11:59 PM 0.5 ft
Sun, Nov 15:50 AM 12.6 ft5:24 PM 13.9 ft11:29 AM 6.1 ft
Mon, Nov 27:12 AM 12.8 ft6:55 PM 13.1 ft12:13 AM 1.5 ft1:00 PM 5.7 ft

The year at Portage Bay, Kupreanof Island

Highest tide, next 12 months19.3 ft on December 24, 2026 at 12:26 PM
Lowest tide, next 12 months-4.5 ft on July 5, 2027 at 8:32 AM
Minus tides (below 0 ft)175 days in the next 12 months
Tide patternTwo high and two low tides a day
Typical daily range15.4 ft (30-day average)
StationNOAA TWC1663 · subordinate station · 57, -133.3167

Portage Bay, Kupreanof Island is a subordinate station: NOAA computes its tides from Juneau with fixed time and height corrections.

Moving water at dawn and dusk —

The current runs fastest roughly halfway between a high and a low tide. Many anglers prefer those hours when they fall near sunrise or sunset. This is a rule of thumb, not a fishing forecast.

Map

Nearby tide stations

Cleveland Passage, Whitney Island17 mi · AK Petersburg19 mi · AK Turn Point19 mi · AK Thomas Bay20 mi · AK Brown Cove21 mi · AK Port Houghton, Robert Islands21 mi · AK Entrance Island22 mi · AK Kake Harbor, Keku Strait22 mi · AK

All Alaska tide stations →

Questions about Portage Bay, Kupreanof Island tides

What time is high tide at Portage Bay, Kupreanof Island today?

On Tuesday, October 27, high tide at Portage Bay, Kupreanof Island is at 2:05 AM (16.1 ft) and 1:53 PM (18.9 ft); low tide is at 7:53 AM (1.8 ft) and 8:29 PM (-3.4 ft) (AKDT, heights above MLLW). The table above lists the next 7 days.

When are the highest tides of the year at Portage Bay, Kupreanof Island?

The highest predicted tide in the next 12 months is 19.3 ft on December 24, 2026 at 12:26 PM. The largest tides fall a day or two after a full or new moon, especially when the Moon is closest to Earth.

Are there minus tides at Portage Bay, Kupreanof Island?

Yes — on 175 days in the next 12 months the low tide drops below 0 ft (MLLW). The lowest is -4.5 ft on July 5, 2027 at 8:32 AM. Minus tides expose the most shoreline, which is why tide-poolers look for them.

What time zone are these tide times in?

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.

Where does this tide data come from?

From NOAA CO-OPS, the U.S. government tide station network (tidesandcurrents.noaa.gov); the predictions are public domain. Portage Bay, Kupreanof Island is a subordinate station: NOAA derives its times and heights from the reference station Juneau with fixed corrections. The curve between highs and lows is our interpolation. This page is not for navigation.