Thunder Hole
A natural sea cave on Acadia's coast where waves crash with a thunderous roar and spectacular spray.
Highlights
Must-see attractions
Social
From TikTok & Reddit
Best Time
Best chance for the boom
Thunder Hole
Best Time
Best chance for the boom
Highlights
Must-see attractions
A natural sea cave on Acadia's coast where waves crash with a thunderous roar and spectacular spray.
"The thunder sound made doesn’t sound the same on video, must hear in person!"
🎯 Time Your Visit for the Roar
Aim for 1-2 hours before high tide for the best chance to hear the thunderous boom.
🌊 Prepare for Spray!
Bring waterproofs! You'll likely get wet from the powerful waves.
Highlights
Discover the most iconic attractions and experiences
The Thunderous Boom
The main inlet
Witness water surge into a cavern, creating a thunderous roar and dramatic spray. A true display of nature's power.
Coastal Views
Surrounding rocky areas
Spectacular ocean vistas and dramatic rock formations offer stunning photo opportunities.
Wave Action
The inlet and surrounding coastline
Observe powerful waves crashing against the rugged Maine coastline, especially on windy days.
Plans like a pro.
Thinks like you
Planning Your Visit
Timing is Everything for the Roar
Embrace the Spray and the Scenery
Best Times
Insider Tips
from TikTok, Instagram & Reddit
🎯 Time Your Visit for the Roar
Aim for 1-2 hours before high tide for the best chance to hear the thunderous boom. +1
🌊 Prepare for Spray!
Bring waterproofs! You'll likely get wet from the powerful waves.
🚶♀️ Expect Crowds
This is a popular spot, especially during peak times. Patience is key!
👟 Wear Sturdy Shoes
The rocks can be slippery. Good footwear is essential for safe exploration.
Tips
from all over the internet
🎯 Time Your Visit for the Roar
Aim for 1-2 hours before high tide for the best chance to hear the thunderous boom. +1
🌊 Prepare for Spray!
Bring waterproofs! You'll likely get wet from the powerful waves.
🚶♀️ Expect Crowds
This is a popular spot, especially during peak times. Patience is key!
👟 Wear Sturdy Shoes
The rocks can be slippery. Good footwear is essential for safe exploration.
📸 Capture the Moment
The dramatic scenery is perfect for photos, but be mindful of your phone near the water.
What Travellers Say
Reviews Summary
Visitors find Thunder Hole to be a spectacular natural wonder, especially when the tide and waves align to create the signature 'boom' and impressive spray. While the crowds can be significant, many agree the dramatic coastal scenery and the sheer power of the ocean make it a worthwhile stop on any Acadia National Park itinerary. Some note that the experience can be underwhelming if the conditions aren't perfect.
"We visited on September 9, 2025. It was very crowded (throughout the entire Park Loop areas). We visited two hours before high tide, per the recommendation. It was cool but a little underwhelming. BUT, the area at Thunder Hole is spectacular and worth a visit whether or not you hear the roar."
Ann Green
"Cool pop off spot. You have to go about an hour or two before high tide so it’s busy then.
The thunder sound made doesn’t sound the same on video, must hear in person!
Prepare for some splashes and crowds along the holes rail.
There are also a lot of great rocks to take in the views from."
Lauren Hess
"Lookout area to look at the waves near ocean level. A small section has stairs, other area is simply rock easily walkable. There's small parking lot across the street and a very small visitor center. Nice but similar to other viewpoints."
Anh Thu Dinh
What People Like
What People Dislike
Frequently Asked Questions
🚇 🗺️ Getting There
Thunder Hole is located on the scenic Park Loop Road in Acadia National Park, between Sand Beach and Otter Cliff. If you're driving, follow the Park Loop Road signs. There's a small parking lot nearby, but it fills up quickly, especially during peak season. Consider using the park's shuttle system if available. 
Yes, Thunder Hole is accessible by car via the Park Loop Road. However, parking is limited and can be challenging to find during busy periods.
If you are already within Acadia National Park, you can walk to Thunder Hole from nearby attractions like Sand Beach. It's a scenic walk along the coast.
The Park Loop Road is the primary route. For a stress-free experience, especially during peak season, consider utilizing the Acadia National Park shuttle system, which often stops at popular points of interest like Thunder Hole.
Yes, there is a small parking lot directly across from Thunder Hole. It tends to fill up very quickly, so arriving early or late in the day is recommended.
🎫 🎫 Tickets & Entry
Thunder Hole is located within Acadia National Park, so you will need an Acadia National Park entrance pass to access it. Passes can be purchased online or at park entrance stations.
Thunder Hole is an outdoor natural attraction and is accessible year-round. However, the park's facilities and roads may have seasonal hours. The best time to visit for the 'boom' is dictated by tide, not park hours.
No, there is no separate fee for Thunder Hole itself. Your Acadia National Park entrance fee covers access to all areas of the park, including Thunder Hole.
It's recommended to purchase your Acadia National Park pass in advance online to save time, especially during the busy summer months.
While the area is generally open, be aware of safety warnings, especially during high tide or rough seas. Stay on marked paths and heed any posted signs.
🎫 🌊 Onsite Experience
Thunder Hole is a natural inlet in the rocks where waves crash with immense force, creating a thunderous sound and dramatic spray that can shoot up to 40 feet. It's famous for this powerful natural phenomenon.
Wear comfortable walking shoes with good grip, as the rocks can be slippery. Bring waterproof clothing or a rain jacket, as you are likely to get sprayed by the waves.
Plan for at least 30 minutes to an hour, especially if you're waiting for the tide to be right for the 'boom.' This allows time to explore the surrounding rocks and enjoy the views.
Children should be closely supervised due to the powerful waves and slippery rocks. While exciting, it can be a hazardous environment if not approached with caution.
You can explore the surrounding rocky coastline, take in the panoramic ocean views, and enjoy the fresh sea air. The area offers great opportunities for photography.
📸 📸 Photography
Early morning and late afternoon offer softer light for photography. However, the dramatic action of the waves is often best captured during midday when the sun is higher, or during stormy weather.
You can capture dramatic wave action, powerful spray, coastal landscapes, and the unique rock formations. Astrophotography is also possible at night.
Protect your gear from salt spray! Consider a polarizing filter to enhance the ocean's colors and a wide-angle lens for dramatic landscapes. Be patient for the perfect wave.
Drone usage in Acadia National Park is subject to strict regulations. Check the National Park Service website for current drone policies before flying.
For capturing wave action, a faster shutter speed is recommended. For landscapes, a smaller aperture for depth of field. Experiment with settings based on light conditions.
For Different Travelers
Tailored advice for your travel style
👨👩👧 Families with Kids
Tips for families:
* Dress for the weather and spray: Waterproof jackets and pants are a must. Bring a change of clothes just in case.
* Wear sturdy, non-slip shoes: Essential for navigating the rocky terrain safely.
* Arrive early: Beat the crowds and secure a good viewing spot before it gets too packed.
* Explain the safety precautions: Talk to your children about staying away from the edge and not climbing on unstable rocks.
🚗 Day-Trippers from Bar Harbor
+1Day-trip strategy:
* Prioritize your time: Since you have limited time, aim to visit Thunder Hole during its optimal tide window (1-2 hours before high tide) for the best chance of experiencing the 'boom.'
* Consider parking: Parking is limited. If the lot is full, you may need to circle back or consider using the park shuttle if it's running.
* Combine with other sights: Thunder Hole is just one of many gems on the Park Loop Road. Plan your route to include other key viewpoints.
📸 Photography Enthusiasts
Photography recommendations:
* Gear up for the elements: Bring protective gear for your camera against salt spray and moisture.
* Experiment with settings: Play with shutter speeds to freeze or blur motion, and use filters to enhance colors.
* Scout for compositions: Explore the surrounding rocks (safely!) to find unique angles and foreground elements.
* Don't forget the sound: While you're capturing visuals, remember that the sound is a huge part of the experience. Consider recording some audio too!
Deep Dives
In-depth insights and expert knowledge
Understanding the 'Thunder'
+2The intensity of the 'thunder' varies greatly. On calm days, you might only hear a gentle splash. However, during periods of higher seas, such as those generated by storms or strong offshore winds, the effect can be truly spectacular, with water spouting high into the air and a sound that resonates through the area. Many visitors report that the sound is much more impressive in person than it appears on video.
Key factors influencing the 'boom' include:
* Tide: The optimal time is typically 1-2 hours before high tide.
+1* Wave Size: Larger waves create a more dramatic effect.
+1* Wind Direction: Offshore winds can help push waves into the inlet more forcefully.
Navigating Acadia's Park Loop Road
+1Driving the Park Loop Road offers breathtaking views at every turn. Pull-offs are frequent, allowing you to stop and admire the rugged coastline, dense forests, and serene lakes. Thunder Hole is strategically located along this route, making it easy to incorporate into a larger itinerary. Be aware that parking at popular spots like Thunder Hole and Sand Beach can be extremely limited, especially during peak season.
Tips for driving the Park Loop Road:
* Consider the Park Shuttle: During the busy summer months, the Acadia National Park shuttle system is an excellent alternative to driving and parking. It stops at most major attractions, including Thunder Hole.
* Go Early or Late: To avoid the worst of the traffic and parking congestion, try to visit Thunder Hole and other popular spots early in the morning or later in the afternoon.
* Be Patient: Traffic can be slow, and parking can be a challenge. Enjoy the scenic drive and don't rush your experience.
Photography at Thunder Hole
When conditions are right, the spray from Thunder Hole can create ethereal, misty effects, especially when backlit by the sun. This is also a prime location for capturing the raw power of the Atlantic Ocean. For those interested in astrophotography, the area around Thunder Hole can offer dark skies away from light pollution, providing a unique backdrop for celestial shots.
Photography Tips:
* Protect Your Gear: Salt spray is a significant hazard. Use a lens hood and consider a rain cover or plastic bag for your camera.
* Experiment with Shutter Speed: Use a fast shutter speed to freeze the action of crashing waves and spray. For a silky smooth water effect, use a slower shutter speed (requires a tripod).
* Look for Unique Angles: Don't just shoot from the main viewing area. Explore the surrounding rocks (safely!) for different perspectives.
* Consider the Light: Golden hour (early morning and late afternoon) offers beautiful, soft light. Midday sun can be harsh but can also create dramatic highlights on the spray.
Social
from TikTok, Instagram & Reddit