September 2025 Events in Seattle, Bellevue, Mercer Island & Bainbridge Island

September is one of the most beautiful times of year in the Pacific Northwest — sunny afternoons, crisp evenings, and a full lineup of local festivals, arts, and community gatherings. Whether you’re in Seattle, Bellevue, Mercer Island, or Bainbridge Island, there’s something special happening every weekend this month.

We’ve rounded up the top events you won’t want to miss in September 2025.

Seattle Events

Bumbershoot Music & Arts Festival -->
📍 Seattle Center | Aug 30–Sept 1 | 🎟 Paid
Seattle’s iconic end-of-summer festival returns with big-name music acts, comedy, visual arts, and family-friendly activities.

Seattle Fringe Festival -->
📍 Capitol Hill | Sept 5–14 | 🎟 Paid (~$15/show)
Catch cutting-edge performances in theater, dance, and storytelling at venues across Capitol Hill.

Washington State Fair (The Puyallup Fair) -->
📍 Puyallup | Aug 30–Sept 22 | 🎟 Paid
Rides, concerts, rodeo events, and incredible fair food make this a September tradition.

Bellevue & Eastside Events

Bellevue Arts Market – Fall Edition -->
📍 Bellevue Downtown Park | Sept 7 | 🆓 Free
Support local makers and browse handcrafted jewelry, art, and home goods in a fun outdoor setting.

Kirkland Oktoberfest -->
📍 Marina Park, Kirkland | Sept 27–29 | 🎟 Paid
Lederhosen, German beer, bratwurst, and live music right on the Kirkland waterfront.

Crossroads Music Festival -->
📍 Crossroads Bellevue | Sept 20–22 | 🆓 Free
A weekend of multicultural performances, dance, and global street food.

Mercer Island Events

Mercer Island Summer Celebration – Fall Concert -->
📍 Luther Burbank Park | Sept 14 | 🆓 Free
Pack a picnic and enjoy live music with Lake Washington views.

Bainbridge Island Events

Bainbridge Island Harvest Fair -->
📍 Bainbridge Island Historical Museum | Sept 21 | 🆓 Free
Celebrate the island’s farming heritage with food tastings, live music, and artisan booths.

Oktoberfest at Battle Point Park -->
📍 Bainbridge Island | Sept 28 | 🎟 Paid
Craft beer, live bands, and games for the whole family.

Don’t Miss Out This September!

From big festivals like Bumbershoot to local harvest fairs on Bainbridge, September is packed with fun. Whether you’re planning a family outing, a date night, or just looking to enjoy the last warm days of the season, the Pacific Northwest has something for everyone.

👉 Check out our full blog for more events and updates each month. If you’d like to know more about local neighborhoods and lifestyle on the Eastside, let’s connect!