Lake Sammamish Seasonal Outlook

Swim score projection

This year (projected) Historical average

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Swim Score Tiers

80-100 Excellent — ideal for swimming
60-79 Good — enjoyable conditions
40-59 Fair — swimmable with caveats
20-39 Poor — cold or unpleasant
0-19 Unsafe — not recommended

Projection based on historical water temperatures, weather patterns, and the swim score model. Actual conditions will vary.