Meydenbauer Beach Park

Managed by King County Department Natural Resources and Parks

Contact: Picnic Reservations: 425-452-6914

Hours: Dawn to dusk

Amenities: Swimming, lifeguard on duty late-June through Labor Day. Fishing dock, play and picnic areas, restrooms, waterfront, handicapped accessible, 2.44 acres.

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Water Quality

Meets water quality standards
Current Status
This status is based on the latest sample, taken on May 22nd, 2023. King County Department Natural Resources and Parks updates the status of this beach as soon as test results become available. These results were posted to Swim Guide on May 25th, 2023 at 2:31 PM.

For water quality icon legend, click:

Current Weather

17°C

Mostly clear

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Monitoring Frequency

Source Information

The King County Department of Natural Resources and Parks monitors water quality at designated swimming beaches in the county from May to September. Water quality data is collected weekly, usually on Tuesdays. Results are generally posted to the King County Lake Swimming Beach Bacteria Monitoring page by noon on Wednesday.

Local health officials use the following protocol to make closure determinations – A day’s average E. coli value is over 1000 CFU/100 mL – OR - The average of the E. coli values for the three most recent sampling days is over 200 CFU/100 mL. The three-day average is calculated using the geometric mean (geomean). The unit of measure is a CFU which stands for Colony Forming Units.

The King County Water and Land Resources Division (WLRD) collects and analyzes the samples. Public Health Seattle & King County is alerted when bacteria or state algal toxin thresholds are exceeded and determines the health and safety implications of the bacteria and algal toxin data collected, and they work with King County WLRD and the local park manager to post an advisory.

A beach is marked Green (open) when both of these protocols are met.
A beach is marked Red (closed) when these criteria are not met and the public health officials have closed the beach.

A beach may also be marked Red if there is a Harmful Algal Bloom (HAB) reported at the beach. A beach is marked Grey when current water quality data is not available.

For more information go to King County Swimming Beach Bacteria Monitoring website: kingcounty.gov/swimbeach.

Water Quality Graph