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Duwamish Waterway, Eighth Ave. South Tide Times

Washington · Station 9447029 · Updated Sep 20, 2026

Duwamish Waterway, Eighth Ave. South runs a mean tidal range of about 7.3 ft. This month the highest water, 11.3 ft, comes on the evening of Sep 11, and the lowest, a -1.4 ft minus tide, on the morning of Sep 30.

Nearest gauge measuring live water level: Seattle (Madison St.), Elliott Bay (9447130), about 5 mi away, high and low tides here run on average about 10 min later.

Predictedno live gauge
Next low tide 1.3 ft at 6:40 AM
High 9.6 ft · 2:19 PMLow 7.1 ft · 8:34 PMHigh 7.8 ft · 11:31 PM
Predicted
Today's tides
Low tide5:32 AM1.1 ft
High tide2:19 PM9.6 ft
Low tide8:34 PM7.1 ft
High tide11:31 PM7.8 ft

Monthly tide calendar

Flood & low finder

🌊 Biggest flood tides at Duwamish Waterway, Eighth Ave. South this month: Sep 1, Sep 8, Sep 9, Sep 10, Sep 11, Sep 12, Sep 13, Sep 26, Sep 27, Sep 28, Sep 29. 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 Duwamish Waterway, Eighth Ave. South this month: Sep 3, Sep 4, Sep 5, Sep 6, Sep 7, Sep 8, Sep 9, Sep 10, Sep 29, Sep 30. These drain the flats and expose the oyster rock, prime for sight-fishing and clamming.

September 2026
Sun
Mon
Tue
Wed
Thu
Fri
Sat
1L:0.7H:9.6L:4.0H:11.0
2L:0.0H:9.4L:5.4H:10.7
3🌗L:-0.4H:9.2L:6.7H:10.3
4🌗L:-0.6H:9.2L:7.6H:9.9
5🌗L:-0.6H:9.6L:7.9H:9.4
6🌗L:-0.7H:10.2L:7.4
7H:9.3L:-0.9H:10.7L:6.4
8H:9.5L:-1.0H:11.0L:5.4
9H:9.8L:-0.8H:11.2L:4.2
10H:10.0L:-0.3H:11.3L:3.1
11🌑H:10.1L:0.5H:11.3
12🌑L:2.1H:10.1L:1.6H:11.2
13🌑L:1.2H:10.0L:2.8H:11.0
14L:0.6H:9.9L:4.1H:10.6
15L:0.2H:9.8L:5.3H:10.1
16L:0.1H:9.6L:6.4H:9.5
17L:0.3H:9.4L:7.2H:8.8
18🌓L:0.7H:9.4L:7.5H:8.2
19🌓L:1.1H:9.6L:7.1H:7.8
20🌓L:1.3H:9.8L:6.6
21🌓H:7.8L:1.3H:10.0L:6.0
22H:8.1L:1.1H:10.2L:5.3
23H:8.5L:1.0H:10.4L:4.5
24H:9.0L:1.1H:10.6L:3.6
25🌕H:9.4L:1.4H:10.8L:2.5
26🌕H:9.9L:2.0H:10.9L:1.3
27🌕H:10.2L:2.8H:11.0
28🌕L:0.1H:10.5L:3.9H:11.0
29L:-0.8H:10.7L:4.9H:10.9
30L:-1.4H:10.7L:6.0H:10.7

Best fishing times (solunar)

Major and minor solunar windows for Duwamish Waterway, Eighth Ave. South, peak feeding activity is around the moon overhead/underfoot (majors) and moonrise/moonset (minors). Score is the day's activity coefficient (0–100).

DayMajor windowsMinor windowsScore
Today 🌓7:03–9:03 PM
7:28–9:28 AM		3:10–5:10 PM
10:59–12:59 AM		43
Sun Sep 20 🌓7:52–9:52 PM
8:17–10:17 AM		3:45–5:45 PM
—		56
Mon Sep 21 🌓8:39–10:39 PM
9:04–11:04 AM		4:12–6:12 PM
12:05–2:05 AM		68
Tue Sep 22 🌔9:24–11:24 PM
9:49–11:49 AM		4:33–6:33 PM
1:15–3:15 AM		79
Wed Sep 23 🌔10:08–12:08 AM
10:33–12:33 PM		4:52–6:52 PM
2:26–4:26 AM		87
Thu Sep 24 🌔10:52–12:52 AM
11:17–1:17 PM		5:08–7:08 PM
3:37–5:37 AM		93
Fri Sep 25 🌕—
—		5:25–7:25 PM
4:48–6:48 AM		96

Predictions & observations: NOAA CO-OPS station 9447029. 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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