Can you swim here today?
Lake Washington Boulevard Park
Seattle, Washington · City park
Cold water — serious cold-shock risk today
As of August 20, 2026, the water temperature at Lake Washington Boulevard Park is 57°F (14°C), measured by NOAA buoy TCNW1, 21.5 miles away.
At this temperature, sudden immersion can trigger involuntary gasping and sap a strong swimmer's strength within minutes. Enter slowly, never alone, and consider a wetsuit — or sit this one out.
Water temp
57°F
14°C
Live data from NOAA buoy TCNW1 (21.5 mi away), as of Aug 20, 10:48 PM UTC.
Before you get in
- Never swim alone — and keep weaker swimmers within arm's reach.
- Scout depth and entry/exit points before you get in.
- Read the current: avoid fast, rising, or murky water.
- Check the forecast — get out well before storms or lightning.
- Obey posted signs, flags, and lifeguard guidance.
Read next
Conditions are for general information only and can change quickly. Always judge the water in person and follow posted advisories and local guidance before swimming or paddling.