What flies are hatching on the Stillaguamish River right now?

Current and seasonal hatches on the Stillaguamish River include Salmonfly, Golden Stone, Caddis. Use the AI Hatch Advisor on this page for a live, temperature-aware recommendation.

What's the current flow on the Stillaguamish River?

The Stillaguamish River is running at 200 CFS at the NF Stillaguamish at Arlington gauge. Readings update every 15 minutes from the USGS Water Services API.

Is the Stillaguamish River fishable today?

Stillaguamish River is outside its fishable window right now. Flow is 200 CFS at the NF Stillaguamish at Arlington gauge. Check back when conditions return to the normal range.

Stillaguamish River Fly Fishing Conditions

Live Conditions

Stillaguamish River — NF Stillaguamish at Arlington

Unfishable

200CFS

Discharge

1.44ft

Gauge Height

—

Water Temp

Updated 54 min agoView on USGS ↗

7-Day Flow

↓ Falling

RisingFallingStable

24-Hr Pressure

29.7 inHg · → High/stable

Falling (good)RisingHigh/stable

Local Weather

68°FOvercast

Wind 5 mph29.7 inHg Stable

Normal conditions

Today

☁️

Overcast

70° / 52°

Tomorrow

☁️

Overcast

78° / 51°

Tue

☁️

Overcast

72° / 54°

Wed

🌧️

Rain

62° / 55°

0.58"

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: 200 CFS · SUMMER STEELHEAD. BWOs returning. Mahogany Duns. Sea-run cutthroat starting in lower river.

What should I pack?

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

🪰 Hatch Calendar

Stillaguamish River · September · Early Fall

Full calendar →

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

Select month

JanDec

SUMMER STEELHEAD. BWOs returning. Mahogany Duns. Sea-run cutthroat starting in lower river.

Blue-Winged Olive

River Map

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

About Stillaguamish River

Wild steelhead stronghold north of Seattle — one of Washington's most important wild winter steelhead rivers, with strong conservation focus and Snohomish Tribe co-management.

SalmonflyGolden StoneCaddisPale Morning DunBlue-Winged OliveOctober Caddis

Regulations

Wild steelhead must be released. Check WDFW — emergency closures have been implemented to protect wild fish populations. Catch Record Card required. Snohomish Tribe co-management applies to parts of this system.

Learn More

Guides to help you fish Stillaguamish River with more confidence.