The 2026 lifeguard season at Madison Park Beach ran June 27 through September 7 and is over, so the beach is unguarded for the rest of the year. Seattle Parks and Recreation takes the floating platform, its diving boards and the swim-area ropes out of the water at the end of the guarded season and puts them back the following summer. The sand, the bathhouse and the water stay open year round. Swimming here in autumn means swimming unsupervised in a Lake Washington that is on its way down into the fifties.

Madison Park is a City of Seattle park at 4201 E Madison St, with the swimming beach addressed separately at 1900 43rd Ave E. Seattle Parks and Recreation operates it and charges nothing. There is no entry fee, no parking fee, no permit and no residency requirement. The park is open 4 a.m. to 11:30 p.m.

The lawn slopes down to about 400 feet of shoreline. The south end is a short sandy stretch under a tall apartment building. The north end is a run of concrete steps that go straight into the water and serve as bleachers on a hot afternoon. A brick bathhouse built in 1919 sits behind the sand with restrooms and changing space. Through the guarded season the City anchors a floating platform offshore carrying a one meter and a three meter diving board, with its own caveat attached that board availability depends on water depth, which shifts over the course of a summer. Guarded hours in 2026 were noon to 7 p.m. on weekdays and 11 a.m. to 7 p.m. on weekends, and the guards kept loaner life jackets on the beach and ran swim lessons. When the ropes are up, novice and non-swimmers are required to stay inside them.

This beach owes its existence to a cable car and a lowered lake. Judge John J. McGilvra cut Madison Street through the forest at his own expense in 1864 and 1865 to reach his lakeshore acreage, then set aside the waterfront end of it for public use. The Madison Street Cable Railway Company he and his friends formed brought the crowds, running cars every two minutes in summer. Seattle built its first ballpark here in 1890, and by the turn of the century the shore carried an ornate boathouse, piers, a wooden promenade, twin bandstands and seating said to hold a thousand people for vaudeville. From 1910 to 1912 city directories list the place as White City Park, complete with amusement rides, a Japanese teahouse bought secondhand from the Alaska-Yukon-Pacific Exposition, and a miniature train so popular with parents that children could not get a seat. None of that produced the beach. The Lake Washington Ship Canal did, when it opened in 1917 and dropped the lake nine feet, leaving shallow water where the old pilings had been. Seattle Electric built the bathhouse in 1919 to serve the new demand, handed the park to the Park Department in 1922, and WPA crews added the tennis courts and remodeled the bathhouse in 1936. The Madison to Kirkland ferry ran off the dock here until 1943. In 1950 the city pulled the ferry pilings and built the small boat dock and fishing pier that stand today. A launching ramp was proposed at the same time and marine engineers advised against it, which is why there is still no ramp.

Public Health Seattle and King County samples Madison for bacteria from mid May to mid September. The last reading of the 2026 season was taken on September 14 and nothing was flagged at this beach during the year, with no cyanobacteria advisory posted for it. Its longer record deserves a plain statement: Swim Guide puts Madison in the band of beaches that pass 60 to 95 percent of the time, a notch below the group of Lake Washington beaches that clear 95 percent and above. Closures at Madison are short when they come and tend to follow hard rain.

Getting in is easy and parking is not. The beach sits at the foot of the old carline in a dense neighborhood where street parking fills early on a warm day, and Metro route 11 still ends at the park. One thing to get right: Madison Park North Beach, a block north at 2300 43rd Ave E, is a separate park, a narrow grass strip behind a rock seawall, and it is not a place to swim from. The swimming is at Madison Park itself.