Thunder Hole
See main listingThunder Hole is a natural rock inlet where incoming waves crash against the rocks and shoot water high into the air with a loud, boom-like roar. It's one of Acadia's most distinctive natural sounds, but here's the catch: timing is everything. The thunderous effect only happens when the waves are strong and the tide is right.
Visit about one to two hours before high tide for the best show. If you arrive during calm seas, you'll still get nice ocean views and dramatic cliffs, but you won't hear the boom. One visitor noted arriving in winter during slack tide found it underwhelming, but acknowledged that's nature, not every day delivers peak performance. On a good day, the power and sound are genuinely impressive.








