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Satellite view of Howard A Hanson Reservoir

Howard A Hanson Reservoir

Reservoir

Cold water — serious cold-shock risk today

Cold water

Cold water — serious cold-shock risk today: water temperature is 57°F, cold enough to cause cold-water shock on sudden immersion.

  • Water temperature is 57°F, cold enough to cause cold-water shock on sudden immersion.
Cold waterGreat conditions today

reservoir in King County, Washington, United States

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Cold water — serious cold-shock risk today

Cold water

Cold water — serious cold-shock risk today: water temperature is 57°F, cold enough to cause cold-water shock on sudden immersion.

  • Water temperature is 57°F, cold enough to cause cold-water shock on sudden immersion. NOAA buoy TCNW1, as of Aug 22, 12:18 AM UTC
Water temp
57°F
14°C

No official beach-advisory feed for Washington yet — follow posted signs and local guidance.

Live data from NOAA buoy TCNW1 (31.4 mi away), as of Aug 22, 12:18 AM UTC.

Weather at Howard A Hanson Reservoir

H: 80° L: 64°
Overcast
Overcast
77°
|
Feels like 78°
Precipitation
17%
Humidity
54%
Wind
4 mph
UV Index
0.4
Water Conditions:
🏊Perfect for swimming
12 AM
Clear
66°
3 AM
Overcast
67°
6 AM
Overcast
66°
9 AM
Overcast
75°
12 PM
Overcast
79°
3 PM
Overcast
79°
6 PM
Overcast
77°
9 PM
Patchy rain nearby
69°

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Frequently asked questions

Where is Howard A Hanson Reservoir?
Howard A Hanson Reservoir is a reservoir in Washington.
What is the water temperature at Howard A Hanson Reservoir?
As of August 22, 2026, the water temperature at Howard A Hanson Reservoir in Washington is 57°F (14°C), measured by NOAA buoy TCNW1, 31.4 miles away.
Can you swim at Howard A Hanson Reservoir?
Cold water — serious cold-shock risk today: water temperature is 57°F, cold enough to cause cold-water shock on sudden immersion. Checked August 22, 2026.

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Location & Contact

Washington

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