Groveland Beach Park

SE 58th Street and 80th Ave SE

Groveland Beach is a 3-acre park featuring a concrete bulkhead, swimming beach, pier, sand volleyball court, and playground. The City acquired the property, which was originally a summer camp for religious groups, in 1965 and developed the beach park in 1967. As Mercer Island’s only west-side beach, Groveland sees high visitation in the summer months, including during the annual Seafair summer festival. 

As you head to the Mercer Island shoreline this summer, stay alert to hidden dangers. The Mercer Island Police Department’s Marine Patrol Unit actively patrols the coast to keep the public safe and has already removed tons of debris left by recent flooding. However, submerged hazards may still be present, risking entanglement or drowning.

Remember that Lake Washington remains deceptively cold beneath the surface, which can quickly trigger muscle failure or hypothermia, even if the air temperature is in the eighties or nineties. Preventable drownings remain elevated across King County, with Lake Washington accounting for nearly 30% of recent open-water fatalities. Exercise caution by never swimming alone, using a life jacket, staying close to shore, and swimming in a designated swim area. Visit King County's website for more tips to swim safely. 

For current water temperatures and water quality results, visit King County's Lake Swimming Beach Bacteria and Temperature page.

Park Amenities

• BBQ
• Benches
• Dock
• Drinking fountains
• Grass area
• Parking
• Picnic tables
• Playground
• Restrooms (open in summer)
• Swimming beach
• Trashcans
• Volleyball court

More Information

• Lifeguards: Groveland Beach Park is not staffed by lifeguards. Swim at your own risk.
• Dog Rules: Dogs and other pets are not allowed at public swim areas from May 1 to September 30. During the rest of the year, dogs are allowed on the beach but must be leashed at all times. Learn more about Mercer Island's off-leash dog areas here.
• Group Use: If you’re interested in bringing a large group to Groveland Beach Park during the summer, you may need a Special Event Permit. Learn more here. Please note – Buses cannot access the parking lot at Groveland Beach Park, and bus parking is not permitted. Mini buses (15 passengers) are allowed.

Seafair: Groveland is a popular destination during the annual Seafair summer festival. To maintain a safe environment, public recreational use at the park during Seafair weekend will be on a first-come, first-served basis and shall be limited to five hundred (500) people daily. Re-entry may not be permitted once the park reaches capacity, and no additional people will be allowed into the park while it is at maximum capacity, as determined by onsite City staff.