Thunder Hole

Thunder Hole: A Spectacular Natural Attraction

The Roar Before the Storm

A raucous natural phenomenon, Thunder Hole is a semi-submerged cave that booms an hour or two before high tide. Waves fill the cave in such a way that the slapping is as loud as a thunderstorm – hence the name. Water can spray as far as 40 feet, so wear a poncho if you want to stay dry.

Know Before You Go

Timing and Accessibility

To catch the big boom, there's an element of luck and timing. Recent travelers suggest the best time to visit is an hour or so before high tide. Visitors also noted that it can be difficult for those with limited mobility, as the rocks can be uneven. However, those who can't make the descent can still see and hear the waves from an accessible upper viewing deck. If you venture outside of the viewing platform (which includes a railing and level steps), walk carefully; the rocks are likely to be wet and slippery.

Safety Tips

Stay well back from the edge, as rogue waves can splash over granite rocks. When you're not admiring the spectacular show, take a moment to soak in the views: you’ll spot Schoodic Peninsula in the distance, Sand Beach to the left, and Otter Cliff to the right.

Getting There

Thunder Hole is on Park Loop Road, south of Sand Beach. This is one of the park's more famous attractions, and it can get crowded, especially in the summer. If you don't want to drive, you can hop on the Island Explorer shuttle (take Route 3 or 4), or you can hike. Starting at the Sand Beach parking lot, follow Ocean Path for nearly a mile. The path hugs the coastline, bringing you south toward Thunder Hole and Otter Cliff.