Tidewindow

Bar Harbor (Acadia) tide windows

NOAA 8413320

Downeast Maine station with a 10-plus-foot range. Low tide opens the Bar Island gravel bar and Acadia's Ship Harbor pools.

Covers: Bar Island land bridge · Ship Harbor · Wonderland

Next best window · computed 2026-08-18

Sep 11, 2026 (Fri): the tide bottoms at -0.5 ft at 5:40 PM — walkable 4:20 PM–7:00 PM, arrive by 4:40 PM. 58 · Fair

sunset+1.0 ft walkable-0.5 ft · 5:40 PM

Every daylight window, next 30 days

Heights in feet MLLW from NOAA station 8413320 (Bar Harbor) predictions. ✳ = federal holiday.

DateLowHeightWindowDaylightScore
Tue9:35 AM0.9 ft9:50 AM–10:00 AM0h 10m0 · Skip
Tue10:10 PM0.8 ft9:45 PM–10:25 PMnight0 · Skip
Wed4:19 AM0.7 ft3:40 AM–5:00 AMnight0 · Skip
Thu4:57 AM0.4 ft4:00 AM–5:50 AMnight0 · Skip
Fri5:33 AM0.2 ft4:30 AM–6:35 AM0h 44m29 · Skip
Fri5:44 PM0.7 ft5:05 PM–6:15 PM1h 10m27 · Skip
Sat6:07 AM0.0 ft4:55 AM–7:15 AM1h 23m43 · Fair
Sat6:22 PM0.4 ft5:30 PM–7:15 PM1h 44m39 · Skip
Sun6:42 AM-0.0 ft5:35 AM–7:50 AM1h 57m50 · Fair
Sun7:01 PM0.2 ft5:55 PM–8:05 PM1h 18m39 · Skip
Mon7:19 AM0.0 ft6:10 AM–8:25 AM2h 15m42 · Fair
Mon7:43 PM0.0 ft6:35 PM–8:50 PM0h 36m25 · Skip
Tue7:59 AM0.2 ft6:55 AM–9:00 AM2h 5m34 · Skip
Tue8:29 PM0.0 ft7:20 PM–9:35 PMnight0 · Skip
Wed8:43 AM0.5 ft7:55 AM–9:25 AM1h 30m23 · Skip
Wed9:19 PM0.1 ft8:10 PM–10:25 PMnight0 · Skip
Thu9:32 AM0.8 ft9:10 AM–10:00 AM0h 50m16 · Skip
Thu10:16 PM0.3 ft9:15 PM–11:15 PMnight0 · Skip
Fri11:20 PM0.4 ft10:30 PM–12:15 AMnight0 · Skip
Sun12:29 AM0.5 ft11:40 PM–1:20 AMnight0 · Skip
Mon ✳1:38 AM0.3 ft12:40 AM–2:35 AMnight0 · Skip
Tue2:42 AM-0.0 ft1:30 AM–3:55 AMnight0 · Skip
Tue2:59 PM0.7 ft2:25 PM–3:30 PM1h 5m19 · Skip
Wed3:40 AM-0.4 ft2:20 AM–5:05 AMnight0 · Skip
Wed3:57 PM0.2 ft2:55 PM–5:00 PM2h 5m36 · Skip
Thu4:32 AM-0.7 ft3:00 AM–6:00 AMnight0 · Skip
Thu4:51 PM-0.2 ft3:35 PM–6:05 PM2h 30m48 · Fair
Fri5:20 AM-0.8 ft3:50 AM–6:45 AM0h 38m44 · Fair
Fri5:40 PM-0.5 ft4:20 PM–7:00 PM2h 31m58 · Fair
Sat6:05 AM-0.6 ft4:40 AM–7:25 AM1h 17m53 · Fair
Sat6:27 PM-0.5 ft5:00 PM–7:45 PM1h 49m56 · Fair
Sun6:48 AM-0.3 ft5:35 AM–8:05 AM1h 55m53 · Fair
Sun7:13 PM-0.3 ft5:50 PM–8:25 PM0h 57m44 · Fair
Mon7:30 AM0.2 ft6:35 AM–8:25 AM1h 50m32 · Skip
Mon7:58 PM-0.0 ft6:45 PM–9:05 PMnight0 · Skip
Tue8:12 AM0.8 ft7:50 AM–8:25 AM0h 35m14 · Skip
Tue8:43 PM0.4 ft7:50 PM–9:35 PMnight0 · 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
Common PeriwinkleLittorina littorea22
Atlantic DogwhelkNucella lapillus13
Common Atlantic SlippersnailCrepidula fornicata7
Atlantic JackknifeEnsis leei5
Tortoiseshell LimpetTestudinalia testudinalis3
Eastern OysterCrassostrea virginica1
Rim-backed NudibranchPalio dubia1
Crowned SeaslugDoto coronata1
Soft-shelled ClamMya arenaria1
Blue MusselMytilus edulis1

Quick answers

When is the next good low tide at Bar Harbor (Acadia)?

Sep 11, 2026 (Fri): a -0.5 ft low at 5:40 PM, walkable from 4:20 PM to 7:00 PM — score 58/100. Computed from NOAA station 8413320 predictions.

How low does the tide need to be at Bar Harbor (Acadia)?

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 Bar Island land bridge is at its best.

How many daylight minus tides does Bar Harbor (Acadia) 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.