Typical August highs at Des Moines Beach reach about 77°F, with reliable beach weather July to August. Des Moines Beach is located in Seattle, Washington.
Seattle, Washington · live parking & conditions · updated June 19, 2026
In a typical year August is the warmest month here, with highs near 77°F, and it's reliably beach weather July to August. Tap Des Moines Beach on the map for live surf, wind, water temperature, UV and tide times.
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