TidalMap

Symonds Bay, Biorka Island Tide Times

Alaska · Station 9451468 · Updated Aug 5, 2026

Symonds Bay, Biorka Island runs a mean tidal range of about 7.5 ft. This month the highest water, 11.1 ft, comes on the morning of Aug 13, and the lowest, a -2.3 ft minus tide, on the morning of Aug 12.

Nearest gauge measuring live water level: Sitka (9451600), about 15 mi away — high and low tides here run on average about 16 min earlier.

Predictedno live gauge

Next high tide 9.6 ft at 5:50 PM

Predicted

Monthly tide calendar

Flood & low finder Flood tide ≥ ft Low tide ≤ ft

🌊 Biggest flood tides at Symonds Bay, Biorka Island this month: Aug 9, Aug 10, Aug 12, Aug 13, Aug 14, Aug 15, Aug 31. These spring highs push water up into the grass and over the oyster rock — prime for poling into flooded marsh for tailing reds.

🔻 Negative (minus) low tides at Symonds Bay, Biorka Island this month: Aug 1, Aug 2, Aug 9, Aug 10, Aug 11, Aug 12, Aug 13, Aug 14, Aug 15, Aug 16, Aug 26, Aug 27 …. These drain the flats and expose the oyster rock — prime for sight-fishing and clamming.

August 2026

Sun

Mon

Tue

Wed

Thu

Fri

Sat

1H:9.5L:-0.9H:9.0L:1.8

2H:9.0L:-0.4H:9.2L:1.5

3H:8.4L:0.4H:9.4L:1.3

4H:7.7L:1.3H:9.5L:1.2

5🌗H:6.9L:2.4H:9.6

6🌗L:1.0H:6.3L:3.4H:9.6

7🌗L:0.8H:6.1L:4.2H:9.6

8L:0.2H:6.5L:4.5H:9.8

9L:-0.6H:7.2L:4.2H:10.3

10L:-1.4H:8.0L:3.5H:10.7

11L:-2.0H:8.7L:2.6

12🌑H:11.1L:-2.3H:9.3L:1.8

13🌑H:11.1L:-2.2H:9.7L:1.1

14🌑H:10.8L:-1.8H:10.0L:0.7

15🌑H:10.2L:-1.0H:10.1L:0.5

16H:9.4L:-0.0H:10.0L:0.6

17H:8.4L:1.1H:9.7L:0.9

18H:7.5L:2.3H:9.2L:1.3

19🌓H:6.6L:3.5H:8.8

20🌓L:1.7H:6.0L:4.4H:8.3

21🌓L:1.9H:5.9L:5.1H:8.0

22🌓L:1.7H:6.3L:5.2H:8.1

23L:1.3H:6.8L:4.9H:8.4

24L:0.7H:7.3L:4.2H:8.9

25L:0.1H:7.8L:3.5H:9.3

26L:-0.4H:8.3L:2.8

27🌕H:9.7L:-0.7H:8.8L:2.1

28🌕H:9.9L:-0.7H:9.3L:1.4

29🌕H:9.9L:-0.5H:9.7L:0.8

30H:9.7L:-0.1H:10.0L:0.3

31H:9.3L:0.6H:10.3L:0.1

Best fishing times (solunar)

Major and minor solunar windows for Symonds Bay, Biorka Island — peak feeding activity is around the moon overhead/underfoot (majors) and moonrise/moonset (minors). Score is the day's activity coefficient (0–100).

Day	Major windows	Minor windows	Score
Today 🌗	5:22–7:22 AM 5:47–7:47 PM	9:27–11:27 PM 2:00–4:00 PM	32
Thu Aug 6 🌗	6:18–8:18 AM 6:43–8:43 PM	9:47–11:47 PM 3:40–5:40 PM	42
Fri Aug 7 🌗	7:19–9:19 AM 7:44–9:44 PM	10:24–12:24 AM 5:14–7:14 PM	55
Sat Aug 8 🌘	8:23–10:23 AM 8:48–10:48 PM	— 6:27–8:27 PM	68
Sun Aug 9 🌘	9:28–11:28 AM 9:53–11:53 PM	11:26–1:26 AM 7:11–9:11 PM	78
Mon Aug 10 🌘	10:30–12:30 PM 10:55–12:55 AM	12:54–2:54 AM 7:37–9:37 PM	86
Tue Aug 11 🌘	11:28–1:28 PM 11:53–1:53 AM	2:34–4:34 AM 7:51–9:51 PM	92

Predictions & observations: NOAA CO-OPS station 9451468. Solunar windows computed from the moon's position for this location. Times shown in the station's local time. Not for navigation.

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