Visiting Bar Harbor, Maine in September

The scent of salty sea air mingling with fresh blueberry muffins, the crunch of leaves underfoot, and waves lapping at a rocky shore—this is Visiting Bar Harbor in September. Nestled on Mount Desert Island, this seaside town blends rugged landscapes, Acadia’s trails, and cozy small-town charm. September offers the best of both worlds: warm sunshine fading into crisp autumn air, fewer crowds, and the first sparks of fiery foliage. Whether you’re whale watching, savoring lobster, or exploring hidden trails, Bar Harbor in September is the perfect mix of tranquility and adventure.

Is September a Good Month to Visit Bar Harbor Maine?

Absolutely, September is a fantastic time to experience the charm of Bar Harbor, Maine. With summer crowds gone, Acadia National Park and the surrounding coast feel more peaceful, yet the weather stays mild—perfect for hiking, biking, and exploring. Early fall foliage begins to paint the landscape in vibrant reds and golds, while whales and wildlife remain active offshore. Lower accommodation rates and a calmer atmosphere make it easy to immerse yourself in the natural beauty. Bar Harbor in September offers the ideal balance of outdoor adventure and serene relaxation, making it one of the best months to visit.

Is September a Good Time to Visit Acadia National Park?

September is an exceptional time to explore Acadia National Park. As crisp air sets in, the landscape begins its autumn transformation, with coastal trails framed by vibrant foliage and sweeping Atlantic views. Popular spots like Cadillac Mountain and Jordan Pond are calmer, offering more space to connect with nature. Whether hiking, photographing fall colors, or simply enjoying the tranquility, Acadia in September delivers an unforgettable mix of adventure and serenity—without the summer crowds.

How Crowded is Bar Harbor in September?

Early September can still see a fair number of visitors, especially during the Labor Day weekend and the first couple of weeks of the month when the weather remains pleasant. However, as September progresses, the crowds tend to thin out significantly. By late September, Bar Harbor becomes much less crowded, and you can enjoy a more tranquil and peaceful experience, both in town and in Acadia National Park.

What to Wear in Bar Harbor Maine in September?

In September, the weather in Bar Harbor, Maine, begins to transition from summer to fall. To ensure comfort and enjoyment during your visit, it's essential to pack clothing that can adapt to changing conditions.

- Consider packing a mix of short-sleeve and long-sleeve shirts or blouses.

- Lightweight sweaters or cardigans that you can easily layer.

- Jeans, comfortable pants, or casual skirts are suitable for bottom wear.

- Don't forget comfortable walking shoes or hiking boots if you plan to explore Acadia National Park or the town's rocky shores.

- In the evenings, temperatures can drop, so it's a good idea to have a medium-weight jacket or fleece on hand.

- Packing a waterproof jacket or a raincoat is advisable.

- A hat and sunglasses to protect yourself from the sun while out exploring.

Is September a Rainy Month in Maine?

September in Maine can bring variable weather conditions, including some rain. While it's not as rainy as the spring months, it's not entirely uncommon to experience occasional rainfall in September.

Can You See the Northern Lights in Acadia National Park in September?

Seeing the northern lights (aurora borealis), in Acadia National Park in September is relatively unlikely.

Does it Snow in Maine in September?

Snowfall in Maine in September is extremely rare, especially in southern and coastal areas of the state. September is still considered late summer and early fall in Maine, and temperatures are generally well above freezing during this time.

How Cold is Maine in September?

Generally, September is a transitional month from summer to fall, so temperatures can vary from pleasantly warm at the beginning of the month to cooler as you move towards the end of September. Daytime temperatures in southern Maine, including cities like Portland, can range from the mid-60s to mid-70s Fahrenheit (around 18-24°C). Nights may be cooler, with temperatures in the 50s°F (around 10-15°C).

Towards the end of the month, temperatures tend to drop. Daytime highs in southern Maine may be in the 60s°F (around 15-20°C), and nighttime lows can dip into the 40s°F (around 4-9°C). In the northern and higher-elevation areas of Maine, temperatures can be slightly cooler, and frost can become a possibility, especially at night, towards the end of September.

What are Some Top Things To Do in Bar Harbor, Maine in September?

Bar Harbor and Acadia together offer a wide range of activities and attractions in September, making it a perfect time to explore this coastal gem. Here are some top things to include in your Bar Harbor September bucket list:

Explore Acadia National Park

Acadia National Park, a gem on Mount Desert Island, is the crown jewel of Bar Harbor. September is the perfect time to visit as the summer months give way to fall, offering cooler weather than peak season and gentler conditions than the winter months. Hike the numerous trails—including the famous Beehive Trail for adventurous climbers—drive up Cadillac Mountain for panoramic views, or enjoy a leisurely picnic by Jordan Pond.

Attend Acadia Night Sky Festival

Held annually in September, this festival invites stargazers, astronomers, and nature enthusiasts to experience the wonder of the night sky in one of the best places for stargazing on the East Coast.

Whale Watching Adventures

September is prime whale watching season in Bar Harbor. Consider joining a whale-watching boat tour for a chance to see these majestic creatures up close.

Discover Bar Island

One unique experience Bar Harbor offers is the Bar Island Sandbar. During low tide, you can walk across to Bar Island from Bridge Street, but be mindful of the high tide which quickly covers the sandbar. Explore the island's trails and enjoy serene views of the harbor.

Indulge in Lobster Delicacies

While downtown restaurants are popular, head a little farther to tucked-away gems like Thurston’s Lobster Pound in Bernard or Trenton Bridge Lobster Pound just off the island. Both serve lobster straight from the boat in no-frills, authentic settings.

Explore the Agamont Park

Agamont Park offers stunning views of Frenchman Bay and the Porcupine Islands, which are particularly lovely during the early fall when the foliage starts to change colors.

Visit the Abbe Museum

For a taste of the region's rich Native American history and culture, head to the Abbe Museum. It's a fantastic place to learn about the Wabanaki tribes through art, artifacts, and interactive exhibits.

Kayaking on Frenchman Bay

Explore the serene waters of Frenchman Bay by renting a kayak. Paddle at your own pace, discover hidden coves, and even spot some local wildlife.

Enjoy a Scenic Drive on Park Loop Road

For breathtaking views without strenuous hikes, try Ocean Path or drive along the Park Loop Road in Acadia National Park. You’ll encounter various overlooks, including Thunder Hole, Otter Cliffs, and the dramatic vistas at Otter Point.

Go Bird Watching

Bar Harbor is a haven for birdwatchers, especially during the fall migration season. Keep an eye out for peregrine falcons, warblers, and other migratory birds.

Stroll Along the Shore Path

The Shore Path is a picturesque walk along the coast, offering stunning views of the harbor and Porcupine Islands.

Catch a Sunset at Cadillac Mountain

Watching the sunset from Cadillac Mountain—the highest point along the Eastern Seaboard—is a must-do in Bar Harbor. In September, you'll experience a magical moment as the sun dips below the horizon, casting a warm glow over the landscape.

Bike the Carriage Roads

Begin at the Hulls Cove Visitor Center, where you can get maps and guidance, before exploring Acadia’s extensive carriage roads—perfect for cycling enthusiasts. These smooth, car-free paths wind through the park's woodlands, making for a peaceful and scenic ride.

Take a Lighthouse Tour

Maine is known across the United States for its charming lighthouses, and Bar Harbor has its fair share. Join a lighthouse tour to visit these iconic structures and learn about their history.

Go on a Bar Harbor Ghost Tour

Bar Harbor Ghost tours offer a unique blend of history and mystery, allowing you to explore the town's haunted past while enjoying a fascinating evening adventure. With each step, you'll feel the eerie presence of Bar Harbor's spectral residents.

Compass Harbor Trail & Oldfarm

Just minutes from downtown, this short and easy trail leads to the remains of George B. Dorr’s estate, the man often called the “Father of Acadia.” It’s a peaceful walk through the woods that ends at a rocky shoreline—rarely crowded, yet rich in history and views.

Wild Gardens of Acadia

Nestled near Sieur de Monts Spring, these gardens—maintained by the National Park Service—showcase over 400 native plant species in a setting that feels like a living museum. September’s changing foliage brings a fresh palette of colors, and it’s a wonderful stop before or after a nearby hike.

Best Places to Eat in Bar Harbor in September

Bar Harbor is as much a feast for the palate as it is for the eyes, and September is the perfect month to savor the town’s flavors.

Jordan Pond House

No trip is complete without a stop at the iconic Jordan Pond House in Acadia National Park. Famous for its warm, airy popovers served with butter and strawberry jam, this spot has been a Bar Harbor tradition since the late 1800s.

Side Street Café

A local favorite, Side Street Café serves up hearty comfort food with a creative twist. Their lobster mac and cheese is a must-try, especially on a cool September evening.

Havana

For something a little different, Havana brings a splash of Latin flavor to the coast of Maine. Known for its seasonal menus and creative cocktails, it’s a James Beard–recognized spot that blends local seafood with global inspiration.

Geddy’s

If you’re after casual dining and a bit of fun, Geddy’s has been a Bar Harbor staple for over 50 years. Expect hearty portions of Maine classics like clam chowder and lobster rolls, all served in a lively, nautical-themed atmosphere.

Galyn’s

Set right across from the waterfront, Galyn’s offers a warm and inviting setting to enjoy Maine classics. Their seafood chowder and scallops are local favorites, and the harbor views add the perfect backdrop to a September dinner.

Where to Stay in September?

Finding the right place to stay in Bar Harbor is part of what makes your September getaway special. With summer winding down, accommodations are easier to book and often a bit more affordable compared to peak July and August.

Waterfront Hotels

If you dream of waking up to salty breezes and panoramic views, consider a stay at the Atlantic Oceanside Hotel & Event Center or The Bayview Hotel. Both offer sweeping looks at Frenchman Bay and are just minutes from downtown and Acadia National Park.

Inns and Bed & Breakfasts

Bar Harbor is dotted with charming B&Bs, most with convenient parking areas, that bring you closer to the town’s small-town warmth. Places like The Inn on Mount Desert or Balance Rock Inn mix classic New England hospitality with a convenient location near restaurants, shops, and the Shore Path.

Budget-Friendly Options

For those looking to stretch their dollar, nearby towns such as Ellsworth or Southwest Harbor provide excellent alternatives. A 30–45 minute drive can reward you with lower rates and a more local feel.

Unique & Offbeat Stays

Want to experience ‘true Maine’ beyond Bar Harbor? Head to nearby Seal Harbor or smaller spots like the Brooklin Inn, surrounded by farms and coastal views, where you’ll share space with locals and travelers in search of authenticity.

Conclusion

All in all, a trip to Bar Harbor, Maine, at this time of year is an opportunity to immerse yourself in the serene beauty of this coastal gem as it transitions from summer to fall. With mild weather, stunning fall foliage, and reduced crowds, it's a perfect time to explore Acadia National Park, savor fresh seafood, and take in the picturesque landscapes.