Mercer Island Weather Today
Bellevue, United States · Updated Friday, April 3, 2026 at 1:44 PM ET
49°F
Broken Clouds
Feels like 46°F · H 51°F / L 47°F
Humidity
71%
Wind
7 mph
SE
Visibility
6 mi
Pressure
1030
hPa
Cloud Cover
75%
Golden Hour · Mercer Island Today
Morning Golden Hour
2:16 PM – 3:16 PM
Sunrise 2:26 PM
Evening Golden Hour
2:34 AM – 3:34 AM
Sunset 3:24 AM
Mercer Island Weather Right Now
Mercer Island weather today is 49°F with broken clouds. The high will reach 51°F and the low will drop to 47°F. It feels like 46°F outside. Humidity is at 71% with winds from the SE at 7 mph. Visibility is 6 miles with 75% cloud cover and a pressure of 1030 hPa.
5-Day Forecast
Sat, Apr 4
61°F
43°F
Scattered Clouds
Sun, Apr 5
64°F
44°F
Overcast Clouds
Mon, Apr 6
69°F
49°F
Overcast Clouds
Tue, Apr 7
52°F
39°F
Light Rain
Wed, Apr 8
43°F
40°F
Overcast Clouds
About Mercer Island Weather
Mercer Island in Lake Washington is surrounded by water creating excellent lake cooling effects and consistent lake breezes year-round.