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Seafair 2026 will be held on Mercer IslandβSeafair returns Friday, July 31, to Sunday, Aug. 2, with a weekend full of festivities, including the popular Blue Angels air shows. Browse the full list of Seafair activities on the event's website. This event draws thousands of attendees to areas along the Lake Washington shoreline, including Mercer Island.β
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Seafair 2026 will be held from July 31 to August 2βSeafair returns Friday, July 31, to Sunday, Aug. 2, with a weekend full of festivities, including the popular Blue Angels air shows.β
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The event brings thousands of attendees to Lake Washington shoreline areasβThis event draws thousands of attendees to areas along the Lake Washington shoreline, including Mercer Island.β
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Groveland Beach Park will limit recreational use to 500 peopleβGroveland Beach Park: The maximum capacity for recreational use will be limited to 500 people on a first-come, first-served basis during Seafair weekend (July 31-Aug 2).β
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Groveland Beach Park will limit recreational use on a first-come, first-served basis during the eventβGroveland Beach Park: The maximum capacity for recreational use will be limited to 500 people on a first-come, first-served basis during Seafair weekend (July 31-Aug 2).β
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Street parking around Groveland Beach Park will be unavailableβstreet parking around the park will be unavailable during Seafair weekend.β
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Proctor Landing will close to the public for first responder accessβProctor Landing will be closed to the public to allow for first responder use.β
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The I-90 floating bridge will remain openβThe I-90 floating bridge will remain OPEN throughout Seafair weekend.β
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The I-90 floating bridge will remain open with no planned closures for air showsβThe I-90 floating bridge will remain OPEN throughout Seafair weekend. There are no planned closures for the air shows.β
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Boaters must follow No Wake ZonesβBoaters should be mindful of No Wake Zones and restricted boat traffic areas during the event.β
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Sober boating enforcement will be activeβSober boating enforcement will be in effect throughout Lake Washington.β
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Mercer Island Marine Patrol will work with other agenciesβMercer Island Marine Patrol will be on the lake along with additional vessels from surrounding law enforcement agencies to ensure everyoneβs safety in the water and along the coastlines.β
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Mercer Island Marine Patrol will work with other agencies to ensure safety on Lake WashingtonβMercer Island Marine Patrol will be on the lake along with additional vessels from surrounding law enforcement agencies to ensure everyoneβs safety in the water and along the coastlines.β
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Residents should plan for crowded parksβParks will be crowded and parking will be limited.β
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Residents should plan for limited parkingβPark Impacts Groveland Beach Park: The maximum capacity for recreational use will be limited to 500 people on a first-come, first-served basis during Seafair weekend (July 31-Aug 2). No more persons from the general public will be allowed into the park for recreational use while the park is at maximum capacity, as calculated by onsite City staff. Also note that street parking around the park will be unavailable during Seafair weekend.β
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Residents should plan for traffic congestionβRoads will be congested and traffic control may direct vehicles down alternate routes. Drive carefully and allow extra time to get home after the shows.β
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Residents should arrive earlyβRemember to arrive early and remain patient to find parking at prime viewing areas and watch for pedestrian traffic.β
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Residents should consider walking or bikingβConsider walking or biking to viewing areas for extra ease.β
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Residents should use light rail to Mercer Island StationβIf coming from off-Island, consider taking light rail to Mercer Island. Aubrey Davis Park, a prime viewing area, is a short walk from Mercer Island Station.β
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Residents should use light rail to Mercer Island Station for easier access to viewing areas like Aubrey Davis ParkβIf coming from off-Island, consider taking light rail to Mercer Island. Aubrey Davis Park, a prime viewing area, is a short walk from Mercer Island Station.β
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Pets should be kept indoors during air showsβAir shows are loud and noise is sporadic. Consider keeping pets inside during airshow practices and performances to prevent runaway pets.β
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Pets should be kept indoors during air shows to prevent runawaysβAir shows are loud and noise is sporadic. Consider keeping pets inside during airshow practices and performances to prevent runaway pets.β