What flies are hatching on the San Juan River right now?

Current and seasonal hatches on the San Juan River include Midge, Blue-Winged Olive. Use the AI Hatch Advisor on this page for a live, temperature-aware recommendation.

What's the current flow on the San Juan River?

The San Juan River is running at 773 CFS at the Below Navajo Dam gauge. Readings update every 15 minutes from the USGS Water Services API.

Is the San Juan River fishable today?

Yes — San Juan River is rated fishable right now. Current flow is 773 CFS at the Below Navajo Dam gauge.

San Juan River Fly Fishing Conditions

Live Conditions

San Juan River — Below Navajo Dam

Fishable

773CFS

Discharge

4.60ft

Gauge Height

47.5°F

Water Temp

Updated 47 min agoView on USGS ↗

7-Day Flow

→ Stable

RisingFallingStable

24-Hr Pressure

24.27 inHg · → High/stable

Falling (good)RisingHigh/stable

Local Weather

70°FPartly cloudy

Wind 2 mph24.27 inHg Low & stable

Tough conditions — fish deep

Today

🌧️

Rain

80° / 56°

0.25"

Tomorrow

🌦️

Drizzle

74° / 58°

0.04"

Thu

🌧️

Rain

68° / 58°

0.68"

Fri

🌧️

Rain showers

75° / 56°

0.43"

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.

8.6

Time of Day

Using: 773 CFS · 47.5°F · BWOs returning

What should I pack?

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

🪰 Hatch Calendar

San Juan River · September · Early Fall

Full calendar →

🟢 Active now at 47.5°F water

MidgeBlue-Winged Olive

Select month

JanDec

BWOs returning (size 20-22). PMDs tapering. Midges year-round. Outstanding fall fishing — cooling air, big rainbows aggressive on pre-spawn streamers and emergers.

Blue-Winged OlivePMDMidgeStreamer

🟢 Active · 🟡 Approaching · ⚪ Seasonal only

River Map

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

About San Juan River

Gold Medal tailwater below Navajo Dam — one of the West's premier year-round trout fisheries. Big rainbows and browns on technical midge and BWO patterns.

MidgeBlue-Winged OlivePale Morning DunCaddis

Regulations

Catch-and-release only with artificial flies and lures only in the 3.75-mile special-regs Quality Waters section below Navajo Dam — one of the best tailwaters in the Southwest. New Mexico fishing license required. Verify current regs at wildlife.state.nm.us before fishing.

Learn More

Guides to help you fish San Juan River with more confidence.