Mailboat Slough, Willapa River Tide Chart & Fishing Times
Tide times, heights, and solunar bite windows for Mailboat Slough, Willapa River, Washington — August 2026 & September 2026. Every value is computed from NOAA harmonic constituents, the same offline engine that powers the Ebb app.
NOAA Station
TWC0940
Type
Subordinate (offset)
Coordinates
46.688, -123.817
Time Zone
Los Angeles
Sun, moon & bite windows
Sunday, August 2
Sunday, August 2
Sunrise 5:57 AM · Sunset 8:45 PM · Moon Waning Gibbous (83% lit)
High 3:57a · 8.5 ftLow 10:11a · -0.3 ftHigh 4:51p · 8.5 ftLow 10:40p · 1.6 ft
Major window ★★★
3:13a – 5:13a
Minor window ★★★
9:55a – 10:55a
Major window ★★★
3:25p – 5:25p
Minor window ★★★
9:51p – 10:51p
Best fishing days — August 2026
Top solunar bite days this month
Ranked by solunar quality — days when the major feeding windows stack up with sunrise, sunset, or a strong tide swing.
Sunday, Aug 2 ★★★
Major window stacks with dawn/dusk and a tide swing
Major windows: 3:13a–5:13a, 3:25p–5:25p
Monday, Aug 3 ★★★
Major window stacks with dawn/dusk and a tide swing
Major windows: 3:56a–5:56a, 4:10p–6:10p
Wednesday, Aug 5 ★★★
Major window stacks with dawn/dusk and a tide swing
Major windows: 5:30a–7:30a, 5:49p–7:49p
Thursday, Aug 6 ★★★
Major window stacks with dawn/dusk and a tide swing
Major windows: 6:23a–8:23a, 6:46p–8:46p
Wednesday, Aug 19 ★★★
Major window stacks with dawn/dusk and a tide swing
Major windows: 5:30a–7:30a, 5:50p–7:50p
Thursday, Aug 20 ★★★
Major window stacks with dawn/dusk and a tide swing
Major windows: 6:19a–8:19a, 6:41p–8:41p
Tide table — August 2026
Mailboat Slough, Willapa River tides, August 2026
All high and low tides for Mailboat Slough, Willapa River, in local time (Los Angeles). Heights are feet above Mean Lower Low Water (MLLW).
| Day | Tides (height above MLLW) | Sunrise / Sunset | |
|---|---|---|---|
| 1 | Sat | H 3:16a 8.9 ftL 9:40a -0.8 ftH 4:21p 8.2 ftL 9:55p 1.9 ft | 5:55a / 8:46p |
| 2 | Sun | H 3:57a 8.5 ftL 10:11a -0.3 ftH 4:51p 8.5 ftL 10:40p 1.6 ft | 5:57a / 8:45p |
| 3 | Mon | H 4:43a 7.8 ftL 10:43a 0.4 ftH 5:22p 8.8 ftL 11:31p 1.2 ft | 5:58a / 8:43p |
| 4 | Tue | H 5:35a 7.1 ftL 11:20a 1.2 ftH 5:58p 9.0 ft | 5:59a / 8:42p |
| 5 | Wed | L 12:27a 0.9 ftH 6:37a 6.4 ftL 12:01p 2.0 ftH 6:41p 9.1 ft | 6a / 8:40p |
| 6 | Thu | L 1:32a 0.6 ftH 7:54a 5.9 ftL 12:53p 2.8 ftH 7:34p 9.2 ft | 6:02a / 8:39p |
| 7 | Fri | L 2:44a 0.2 ftH 9:26a 5.7 ftL 2:02p 3.5 ftH 8:40p 9.2 ft | 6:03a / 8:37p |
| 8 | Sat | L 3:57a -0.4 ftH 10:53a 6.0 ftL 3:27p 3.7 ftH 9:51p 9.5 ft | 6:04a / 8:36p |
| 9 | Sun | L 5:03a -1.0 ftH 12:02p 6.6 ftL 4:45p 3.5 ftH 10:58p 9.8 ft | 6:05a / 8:34p |
| 10 | Mon | L 6:01a -1.5 ftH 12:55p 7.2 ftL 5:52p 3.0 ft | 6:07a / 8:33p |
| 11 | Tue | H 12a 10.1 ftL 6:51a -1.9 ftH 1:40p 7.9 ftL 6:49p 2.3 ft | 6:08a / 8:31p |
| 12 | Wed | H 12:57a 10.3 ftL 7:37a -2.1 ftH 2:20p 8.4 ftL 7:41p 1.7 ft | 6:09a / 8:29p |
| 13 | Thu | H 1:50a 10.3 ftL 8:18a -1.9 ftH 2:58p 8.9 ftL 8:30p 1.1 ft | 6:10a / 8:28p |
| 14 | Fri | H 2:39a 10.0 ftL 8:57a -1.5 ftH 3:34p 9.2 ftL 9:16p 0.8 ft | 6:12a / 8:26p |
| 15 | Sat | H 3:27a 9.4 ftL 9:35a -0.8 ftH 4:09p 9.4 ftL 10:03p 0.6 ft | 6:13a / 8:24p |
| 16 | Sun | H 4:14a 8.7 ftL 10:12a 0.1 ftH 4:44p 9.3 ftL 10:50p 0.5 ft | 6:14a / 8:23p |
| 17 | Mon | H 5:03a 7.8 ftL 10:48a 1.1 ftH 5:19p 9.1 ftL 11:40p 0.6 ft | 6:16a / 8:21p |
| 18 | Tue | H 5:56a 7.0 ftL 11:26a 2.0 ftH 5:57p 8.8 ft | 6:17a / 8:19p |
| 19 | Wed | L 12:33a 0.8 ftH 6:55a 6.3 ftL 12:08p 2.9 ftH 6:39p 8.4 ft | 6:18a / 8:18p |
| 20 | Thu | L 1:33a 1.0 ftH 8:08a 5.8 ftL 1p 3.7 ftH 7:30p 8.1 ft | 6:19a / 8:16p |
| 21 | Fri | L 2:42a 1.1 ftH 9:42a 5.7 ftL 2:12p 4.2 ftH 8:33p 7.9 ft | 6:21a / 8:14p |
| 22 | Sat | L 3:52a 0.9 ftH 11:08a 5.9 ftL 3:36p 4.3 ftH 9:42p 7.9 ft | 6:22a / 8:12p |
| 23 | Sun | L 4:53a 0.6 ftH 12:04p 6.3 ftL 4:46p 4.1 ftH 10:43p 8.2 ft | 6:23a / 8:10p |
| 24 | Mon | L 5:43a 0.2 ftH 12:43p 6.8 ftL 5:40p 3.6 ftH 11:36p 8.5 ft | 6:25a / 8:09p |
| 25 | Tue | L 6:24a -0.2 ftH 1:15p 7.2 ftL 6:25p 3.1 ft | 6:26a / 8:07p |
| 26 | Wed | H 12:22a 8.9 ftL 7:01a -0.4 ftH 1:44p 7.7 ftL 7:04p 2.6 ft | 6:27a / 8:05p |
| 27 | Thu | H 1:05a 9.1 ftL 7:33a -0.6 ftH 2:11p 8.1 ftL 7:41p 2.0 ft | 6:28a / 8:03p |
| 28 | Fri | H 1:45a 9.2 ftL 8:04a -0.6 ftH 2:38p 8.6 ftL 8:18p 1.5 ft | 6:30a / 8:01p |
| 29 | Sat | H 2:25a 9.1 ftL 8:35a -0.3 ftH 3:05p 8.9 ftL 8:55p 1.0 ft | 6:31a / 7:59p |
| 30 | Sun | H 3:05a 8.9 ftL 9:05a 0.1 ftH 3:32p 9.2 ftL 9:34p 0.5 ft | 6:32a / 7:57p |
| 31 | Mon | H 3:48a 8.5 ftL 9:37a 0.7 ftH 4:02p 9.5 ftL 10:17p 0.2 ft | 6:34a / 7:55p |
Last QuarterAug 5
New MoonAug 12
First QuarterAug 19
Full MoonAug 27
Tide table — September 2026
Mailboat Slough, Willapa River tides, September 2026
| Day | Tides (height above MLLW) | Sunrise / Sunset | |
|---|---|---|---|
| 1 | Tue | H 4:35a 7.9 ftL 10:11a 1.4 ftH 4:36p 9.6 ftL 11:06p 0.0 ft | 6:35a / 7:54p |
| 2 | Wed | H 5:29a 7.2 ftL 10:50a 2.2 ftH 5:15p 9.5 ft | 6:36a / 7:52p |
| 3 | Thu | L 12:02a 0.0 ftH 6:33a 6.6 ftL 11:36a 3.0 ftH 6:04p 9.3 ft | 6:37a / 7:50p |
| 4 | Fri | L 1:07a 0.1 ftH 7:53a 6.2 ftL 12:36p 3.7 ftH 7:07p 9.1 ft | 6:39a / 7:48p |
| 5 | Sat | L 2:23a 0.1 ftH 9:26a 6.2 ftL 2p 4.1 ftH 8:25p 8.9 ft | 6:40a / 7:46p |
| 6 | Sun | L 3:40a -0.1 ftH 10:47a 6.6 ftL 3:33p 3.9 ftH 9:46p 9.1 ft | 6:41a / 7:44p |
| 7 | Mon | L 4:47a -0.4 ftH 11:45a 7.3 ftL 4:50p 3.3 ftH 10:57p 9.4 ft | 6:43a / 7:42p |
| 8 | Tue | L 5:43a -0.8 ftH 12:31p 8.0 ftL 5:51p 2.4 ftH 11:58p 9.7 ft | 6:44a / 7:40p |
| 9 | Wed | L 6:30a -0.9 ftH 1:10p 8.7 ftL 6:44p 1.6 ft | 6:45a / 7:38p |
| 10 | Thu | H 12:53a 9.8 ftL 7:13a -0.8 ftH 1:46p 9.2 ftL 7:31p 0.8 ft | 6:46a / 7:36p |
| 11 | Fri | H 1:43a 9.8 ftL 7:51a -0.5 ftH 2:19p 9.6 ftL 8:14p 0.2 ft | 6:48a / 7:34p |
| 12 | Sat | H 2:30a 9.5 ftL 8:27a 0.0 ftH 2:51p 9.8 ftL 8:55p -0.1 ft | 6:49a / 7:32p |
| 13 | Sun | H 3:14a 9.0 ftL 9:01a 0.7 ftH 3:22p 9.8 ftL 9:36p -0.2 ft | 6:50a / 7:30p |
| 14 | Mon | H 3:58a 8.4 ftL 9:35a 1.5 ftH 3:54p 9.6 ftL 10:17p -0.1 ft | 6:52a / 7:28p |
| 15 | Tue | H 4:44a 7.8 ftL 10:10a 2.3 ftH 4:26p 9.3 ftL 10:59p 0.2 ft | 6:53a / 7:26p |
| 16 | Wed | H 5:32a 7.2 ftL 10:46a 3.1 ftH 5:02p 8.9 ftL 11:47p 0.6 ft | 6:54a / 7:24p |
| 17 | Thu | H 6:27a 6.6 ftL 11:27a 3.8 ftH 5:44p 8.4 ft | 6:55a / 7:22p |
| 18 | Fri | L 12:42a 1.0 ftH 7:35a 6.2 ftL 12:20p 4.3 ftH 6:37p 7.9 ft | 6:57a / 7:20p |
| 19 | Sat | L 1:48a 1.3 ftH 9:01a 6.1 ftL 1:38p 4.6 ftH 7:47p 7.6 ft | 6:58a / 7:18p |
| 20 | Sun | L 3:02a 1.4 ftH 10:23a 6.3 ftL 3:11p 4.6 ftH 9:05p 7.6 ft | 6:59a / 7:16p |
| 21 | Mon | L 4:08a 1.2 ftH 11:15a 6.8 ftL 4:23p 4.1 ftH 10:14p 7.9 ft | 7:01a / 7:14p |
| 22 | Tue | L 5a 0.9 ftH 11:52a 7.3 ftL 5:16p 3.4 ftH 11:10p 8.3 ft | 7:02a / 7:12p |
| 23 | Wed | L 5:42a 0.6 ftH 12:23p 7.9 ftL 6p 2.7 ftH 11:59p 8.6 ft | 7:03a / 7:10p |
| 24 | Thu | L 6:19a 0.4 ftH 12:52p 8.5 ftL 6:40p 1.9 ft | 7:05a / 7:08p |
| 25 | Fri | H 12:45a 8.9 ftL 6:54a 0.4 ftH 1:20p 9.0 ftL 7:17p 1.0 ft | 7:06a / 7:06p |
| 26 | Sat | H 1:28a 9.1 ftL 7:26a 0.6 ftH 1:48p 9.6 ftL 7:54p 0.3 ft | 7:07a / 7:04p |
| 27 | Sun | H 2:11a 9.0 ftL 7:59a 0.9 ftH 2:17p 10.0 ftL 8:33p -0.4 ft | 7:08a / 7:02p |
| 28 | Mon | H 2:55a 8.9 ftL 8:33a 1.4 ftH 2:48p 10.3 ftL 9:13p -0.8 ft | 7:10a / 7p |
| 29 | Tue | H 3:42a 8.5 ftL 9:08a 1.9 ftH 3:21p 10.4 ftL 9:57p -0.9 ft | 7:11a / 6:58p |
| 30 | Wed | H 4:32a 8.1 ftL 9:47a 2.6 ftH 4p 10.3 ftL 10:46p -0.8 ft | 7:12a / 6:56p |
Last QuarterSep 3
New MoonSep 10
First QuarterSep 18
Full MoonSep 26
Every station, offline, forever
Take every tide chart with you — even with zero signal.
Ebb computes tides and solunar bite windows for all 3,399 U.S. stations right on your phone, with no connection required. Unlimited dates, home & lock-screen widgets, and pre-window alerts. $9.99 once — no subscription, ever.
App StoreComing soon — Ebb is in final App Review. Explore what it does →
Nearby stations
Tide charts near Mailboat Slough, Willapa River
About this data
Predictions for Mailboat Slough, Willapa River are computed from NOAA CO-OPS harmonic constituents using Ebb's on-device engine (a Schureman/pytides harmonic model). They are astronomical tide predictions and do not account for weather, wind, or barometric pressure, which can shift real water levels. Solunar bite windows are a fishing-planning heuristic, not a guarantee. Ebb is a fishing- and trip-planning tool, not a navigation product — always consult NOAA Tides & Currents and official sources for navigation-critical decisions.