What flies are hatching on the Williamson River right now?

Current and seasonal hatches on the Williamson River include Pale Morning Dun, Trico, Caddis. Use the AI Hatch Advisor on this page for a live, temperature-aware recommendation.

What's the current flow on the Williamson River?

The Williamson River is running at 0 CFS at the Williamson near Klamath Agency gauge. Readings update every 15 minutes from the USGS Water Services API.

Is the Williamson River fishable today?

Williamson River is outside its fishable window right now. Flow is 0 CFS at the Williamson near Klamath Agency gauge. Check back when conditions return to the normal range.

Williamson River Fly Fishing Conditions

Live Conditions

Williamson River — Williamson near Klamath Agency

Unfishable

0CFS

Discharge

0.77ft

Gauge Height

—

Water Temp

Updated 58 min agoView on USGS ↗

7-Day Flow

→ Stable

RisingFallingStable

24-Hr Pressure

25.77 inHg · → High/stable

Falling (good)RisingHigh/stable

Local Weather

67°FClear sky

Wind 6 mph25.77 inHg Low & stable

Tough conditions — fish deep

Today

☀️

Clear sky

79° / 55°

Tomorrow

☀️

Clear sky

83° / 47°

Sat

☀️

Clear sky

86° / 55°

Sun

☁️

Overcast

90° / 58°

Cold front incoming — go deep with nymphs, surface activity likely slow.

Weather by Open-Meteo · No API key · Updated every 30 min

What should I fish today?

⚡ AI

AI-powered recommendation using today's live flow, temperature, and hatch data.

2

Time of Day

Using: 0 CFS · HEXAGENIA at peak — size 6-8 cream-colored mayflies

What should I pack?

Rod, flies, tippet, and safety gear specific to today's Williamson River conditions.

🪰 Hatch Calendar

Williamson River · July · Summer

Full calendar →

Showing typical dates — water temperature data unavailable for live hatch predictions.

Select month

JanDec

HEXAGENIA at peak — size 6-8 cream-colored mayflies, dusk emergence. PMDs continue. Caddis. Trophy redsides surface-feeding.

PMDCaddis

River Map

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USGS Gauge (click for site ID)Fishing Access / SectionScroll to zoom disabled — use map controls

About Williamson River

Klamath Basin spring-fed river — trophy browns and monster redband rainbows in clear, slow water. Technical sight-fishing through ranch meadows and canyon stretches; the Williamson grows some of the largest wild rainbows in the lower 48.

Pale Morning DunTricoCaddisBlue-Winged OliveHexageniaMidge

Regulations

Special slot limits protect trophy fish — check current ODFW regs. Catch-and-release encouraged. Klamath Tribes have treaty rights on parts of this system.

Learn More

Guides to help you fish Williamson River with more confidence.