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Union River - Photo 1
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Photo: Lake Washington Ship Canal, U.S. Government Locks, Seattle, Washington. View of Lake Union and Aurora Ave. bridge under construction. Vertical clearance of 135 feet; horizontal distance between center line of piers, 800 feet. by Unknown authorUnknown author or not provided (Public domain) License

Live flow only β€” judge the water in person

Use caution

Live flow only β€” judge the water in person: live streamflow is available but no water-temperature sensor is nearby.

  • Live streamflow is available but no water-temperature sensor is nearby.
  • Flow is within the normal range (25th–75th percentile) for Aug 23 (median 4 ftΒ³/s over 71 years).

Live flow only β€” judge the water in person

Use caution

Live flow only β€” judge the water in person: live streamflow is available but no water-temperature sensor is nearby.

  • Live streamflow is available but no water-temperature sensor is nearby. β€” USGS gauge 12073500, as of Aug 22, 10:15 PM gauge-local time
  • Flow is within the normal range (25th–75th percentile) for Aug 23 (median 4 ftΒ³/s over 71 years). β€” USGS daily streamflow statistics, as of Aug 22, 10:15 PM gauge-local time
Streamflow
5 ftΒ³/s
discharge
Gage height
1.17 ft
water level

Flow is normal for this date β€” within the normal range (25th–75th percentile) for Aug 23 (median 4 ftΒ³/s over 71 years).

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

Live, provisional data from USGS gauge HUGE CREEK NEAR WAUNA, WA (8.7 mi away), as of Aug 22, 10:15 PM gauge-local time.

Weather at Union River

H: 77Β° L: 58Β°
Clear
Clear
61Β°
|
Feels like 60Β°
Precipitation
19%
Humidity
71%
Wind
3 mph
UV Index
0
Water Conditions:
πŸ₯ΆToo cold for most swimmers
12 AM
Clear
62Β°
3 AM
Cloudy
60Β°
6 AM
Partly Cloudy
58Β°
9 AM
Patchy rain nearby
60Β°
12 PM
Partly Cloudy
68Β°
3 PM
Sunny
75Β°
6 PM
Sunny
74Β°
9 PM
Clear
62Β°

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Frequently asked questions

Where is Union River?
Union River is a river in Washington.
Can you swim at Union River?
Live flow only β€” judge the water in person: live streamflow is available but no water-temperature sensor is nearby. Checked August 22, 2026.
How is Union River rated?
Union River in Washington has an average visitor rating of 4.3 out of 5, based on 6 reviews.

Visitor Reviews

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Best Times to Visit

πŸ§₯
Right Now
Cool weather - dress warmly
🌊 Rivers & Streams Tips:
  • β€ΊCheck water levels and current conditions before visiting
  • β€ΊWear life jackets when on the water
  • β€ΊBe aware of rapids and potential hazards
  • β€ΊRespect private property along riverbanks
Best Seasons:
β˜€οΈ Summer (Jun-Aug)πŸ‚ Fall (Sep-Nov)🌸 Spring (Mar-May)

Location & Contact

Washington

Washington None

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