Typical August highs at Rosario Beach reach about 71°F. Rosario Beach is located in Anacortes, Washington.
Anacortes, Washington · live parking & conditions · updated June 19, 2026
In a typical year August is the warmest month here, with highs near 71°F. Tap Rosario Beach on the map for live surf, wind, water temperature, UV and tide times.
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