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Satellite view of Duncan Slough

Duncan Slough

River

Live flow only — judge the water in person

Use caution

Live flow only — 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 below the 25th percentile for Aug 22 (median 141,000 ft³/s over 36 years).
Use cautionCool todaycamping-nearby

tributary to Brown Slough in Wahkiakum County, Washington, United States

Interactive map not available

Live flow only — judge the water in person

Use caution

Live flow only — 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. USGS gauge 14246900, as of Aug 21, 6:50 PM gauge-local time
  • Flow is below the 25th percentile for Aug 22 (median 141,000 ft³/s over 36 years). USGS daily streamflow statistics, as of Aug 21, 6:50 PM gauge-local time
Streamflow
45,600 ft³/s
discharge
Gage height
4.25 ft
water level

Flow is low for this date — below the 25th percentile for Aug 22 (median 141,000 ft³/s over 36 years).

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

Live, provisional data from USGS gauge COLUMBIA RIVER AT PORT WESTWARD, NEAR QUINCY, OR (11.3 mi away), as of Aug 21, 6:50 PM gauge-local time.

Weather at Duncan Slough

H: 67° L: 57°
Overcast
Overcast
63°
|
Feels like 64°
Precipitation
33%
Humidity
91%
Wind
5 mph
UV Index
0.2
Water Conditions:
🥶Too cold for most swimmers
12 AM
Mist
60°
3 AM
Fog
58°
6 AM
Fog
57°
9 AM
Fog
58°
12 PM
Mist
62°
3 PM
Overcast
66°
6 PM
Overcast
65°
9 PM
Overcast
61°

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Frequently asked questions

Where is Duncan Slough?
Duncan Slough is a river in Washington.
Can you swim at Duncan Slough?
Live flow only — judge the water in person: live streamflow is available but no water-temperature sensor is nearby. Checked August 21, 2026.
What amenities does Duncan Slough have?
Visitor-listed amenities at Duncan Slough include camping-nearby.

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Best Times to Visit

🧥
Right Now
Cool weather - dress warmly
🌊 Rivers & Streams Tips:
  • Check water levels and current conditions before visiting
  • Wear life jackets when on the water
  • Be aware of rapids and potential hazards
  • Respect private property along riverbanks
Best Seasons:
☀️ Summer (Jun-Aug)🍂 Fall (Sep-Nov)🌸 Spring (Mar-May)

Location & Contact

Washington

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Amenities

Camping nearby