What is the current flow on Similkameen River?

Similkameen River was running 401 cubic feet per second as of Aug 1, 2026, 5:30 PM UTC, measured at USGS gauge 12442500. This is a build-time snapshot rather than a live reading — check the USGS gauge directly before relying on it.

What is the water temperature on Similkameen River?

66.6°F (19.2°C) as of Aug 1, 2026, 5:30 PM UTC, at USGS gauge 12442500. Trout come under thermal stress above about 68°F, and Montana FWP restricts angling when max daily water temperature reaches 73F for 3 consecutive days. This reading is below the 68°F stress threshold.

Is Similkameen River stocked?

Yes — Similkameen River is on the state's stocked trout water list. Stocked water is managed as put-and-take: fish are raised in a hatchery and released, rather than reproducing in the stream. Source: undefined.

Similkameen River

Washington. A state-stocked trout water. Running 401 cfs as of Aug 1, 2026, 5:30 PM UTC.

Latest Reading

401

cubic feet / second

66.6°F

water temperature (19.2°C)

USGS gauge

Flow measured Aug 1, 2026, 5:30 PM UTC at gauge 12442500. Temperature measured Aug 1, 2026, 5:30 PM UTC at gauge 12442500. These are build-time snapshots, not a live feed — check the USGS gauge before relying on them.

Water temperature and trout

Similkameen River read 66.6°F as of Aug 1, 2026, 5:30 PM UTC. Trout come under thermal stress above roughly 68°F, and mortality after catch-and-release rises sharply in warm water. Montana FWP restricts angling when max daily water temperature reaches 73F for 3 consecutive days.

This reading sat below the stress threshold. Temperatures swing through the day and peak in late afternoon, so a morning reading can understate the daily maximum.

State Trout Classification

Classification

State-stocked trout water

Source: .

USGS Gauges on Similkameen River

Gauge	Station	Water temp?
12442500	SIMILKAMEEN RIVER NEAR NIGHTHAWK, WA	Yes

Fly fishing rivers →Washington trout water →Washington lakes →

Conditions: USGS NWIS (public domain).