Tidewindow

Charleston (Coos Bay) tide windows

NOAA 9432780

South-central Oregon coast station beside Sunset Bay — some of the state's richest and most sheltered tidepools.

Covers: Sunset Bay State Park · Cape Arago · Simpson Reef

Next best window · computed 2026-08-18

Aug 29, 2026 (Sat): the tide bottoms at -0.1 ft at 7:30 AM — walkable 5:55 AM–9:05 AM, arrive by 6:30 AM. 56 · Fair

sunrise+1.0 ft walkable-0.1 ft · 7:30 AM

Every daylight window, next 30 days

Heights in feet MLLW from NOAA station 9432780 (Charleston) predictions. ✳ = federal holiday.

DateLowHeightWindowDaylightScore
Tue11:36 PM0.8 ft10:55 PM–12:15 AMnight0 · Skip
Thu12:40 AM0.9 ft12:40 AM–1:05 AMnight0 · Skip
Fri1:50 AM0.9 ft1:35 AM–2:15 AMnight0 · Skip
Sat2:58 AM0.8 ft2:00 AM–4:00 AMnight0 · Skip
Sun3:57 AM0.5 ft2:40 AM–5:20 AMnight0 · Skip
Mon4:44 AM0.2 ft3:10 AM–6:25 AMnight0 · Skip
Tue5:24 AM-0.1 ft3:40 AM–7:15 AM0h 41m29 · Skip
Wed5:59 AM-0.3 ft4:10 AM–7:50 AM1h 15m38 · Skip
Thu6:30 AM-0.4 ft4:45 AM–8:20 AM1h 44m45 · Fair
Fri7:00 AM-0.3 ft5:20 AM–8:45 AM2h 8m53 · Fair
Sat7:30 AM-0.1 ft5:55 AM–9:05 AM2h 27m56 · Fair
Sun7:59 AM0.3 ft6:45 AM–9:10 AM2h 25m48 · Fair
Sun8:30 PM0.7 ft7:45 PM–9:15 PM0h 10m0 · Skip
Mon8:30 AM0.8 ft7:55 AM–9:05 AM1h 10m22 · Skip
Mon9:14 PM0.4 ft8:00 PM–10:25 PMnight0 · Skip
Tue10:03 PM0.2 ft8:40 PM–11:30 PMnight0 · Skip
Wed11:01 PM0.1 ft9:35 PM–12:35 AMnight0 · Skip
Fri12:10 AM0.1 ft10:35 PM–1:50 AMnight0 · Skip
Sat1:26 AM0.1 ft11:45 PM–3:15 AMnight0 · Skip
Sun2:41 AM-0.2 ft12:50 AM–4:40 AMnight0 · Skip
Mon ✳3:46 AM-0.5 ft1:45 AM–5:55 AMnight0 · Skip
Tue4:41 AM-0.7 ft2:40 AM–6:45 AMnight0 · Skip
Wed5:27 AM-0.8 ft3:30 AM–7:30 AM0h 40m40 · Fair
Thu6:09 AM-0.6 ft4:20 AM–8:00 AM1h 8m42 · Fair
Fri6:47 AM-0.3 ft5:15 AM–8:20 AM1h 27m43 · Fair
Fri7:09 PM0.5 ft6:10 PM–8:10 PM1h 24m28 · Skip
Sat7:23 AM0.2 ft6:10 AM–8:35 AM1h 41m40 · Fair
Sat7:52 PM0.1 ft6:35 PM–9:10 PM0h 57m35 · Skip
Sun7:57 AM0.9 ft7:40 AM–8:15 AM0h 35m24 · Skip
Sun8:33 PM-0.0 ft7:05 PM–10:05 PM0h 26m0 · Skip
Mon9:15 PM0.0 ft7:50 PM–10:45 PMnight0 · Skip
Tue9:59 PM0.3 ft8:40 PM–11:25 PMnight0 · Skip
Wed10:49 PM0.6 ft9:45 PM–12:00 AMnight0 · Skip

Monthly calendars

July 2026August 2026September 2026

What's in the pools right now

Research-grade observations within 5 km in the last 60 days, via iNaturalist (data © contributors, CC BY-NC).

SpeciesScientific nameObservations
Branched DendronotidDendronotus venustus26
Horned NudibranchHermissenda crassicornis16
Monterey DoridDoris montereyensis9
Red Sponge DoridRostanga pulchra5
San Diego DoridDiaulula sandiegensis5
White-and-orange-tipped NudibranchAntiopella fusca5
Chan's DoridHallaxa chani3
Mossy ChitonMopalia muscosa3
Clown DoridTriopha catalinae2
Nanaimo DoridAcanthodoris nanaimoensis2

Quick answers

When is the next good low tide at Charleston (Coos Bay)?

Aug 29, 2026 (Sat): a -0.1 ft low at 7:30 AM, walkable from 5:55 AM to 9:05 AM — score 56/100. Computed from NOAA station 9432780 predictions.

How low does the tide need to be at Charleston (Coos Bay)?

Tidewindow counts a window whenever the predicted height falls below +1.0 ft MLLW, and scores depth from +0.5 ft (0 points) to −2.0 ft (50 points). The lower the tide, the more of the intertidal zone is exposed — minus tides (below 0 ft) are when Sunset Bay State Park is at its best.

How many daylight minus tides does Charleston (Coos Bay) get in the next 30 days?

8 of the next 30 days' 12 minus tides overlap daylight by at least 30 minutes, as of 2026-08-18. The full list is in the table above.

Safety: tide predictions are astronomical forecasts, not observations — wind and swell change actual water levels. Follow posted rules at protected areas, and never turn your back on the ocean. See our methodology for exactly how windows and scores are computed.