Seafair is an annual summer festival in Seattle, Washington, that encompasses a wide variety of small neighborhood events leading up to several major citywide celebrations.

Seafair also encompasses smaller block parties and local parades around the city and Seattle metropolitan area.

[1] The next edition of Seafair was also cancelled in April 2021, stating that "while encouraged by Governor Inslee's Phase 3 guidelines that support small and medium size events to return with limitations, Seafair leadership recognizes the guidelines will not support events the scale of a city-wide festival.

World-class aerobatics teams perform their aerial stunts over Lake Washington, most prominently the US Navy Blue Angels and US Army Golden Knights.

The aerobatics show is a slightly controversial part of Seafair, as some local residents fear an accident involving the low-flying aircraft, and some find the noise of the jet engines irritating.

In 1996 the Blue Angels flew over Elliott Bay, west of downtown Seattle, in a separate event from the hydroplane race, but this was a financial flop, and they returned to being part of the race-weekend festivities over Lake Washington in 1997.

[10] Due to government budget cuts, the Blue Angels did not perform at Seafair 2013; they were replaced by the Patriots Jet Team.

[5] From 2019, the aerobatics show fly-over area was moved south to avoid the closing of the floating bridges carrying Interstate 90 between Mercer Island and Seattle during the three days of Seafair Weekend.