San Juan River Fly Fishing Report
Blanco, San Juan County, New Mexico · Last Updated: July 16, 2026
The San Juan below Navajo Dam is one of the most productive tailwaters in the West, with mind-boggling densities of large rainbow and brown trout. Its consistent flows, clear water, and year-round fishing make it a go-to destination for New Mexico anglers.
Today's Trout Fishability
Conditions at a Glance
The San Juan River near Blanco is running well above normal at 1060 cfs near Archuleta (+64% vs average) with water temperature at 46°F.
- Heavy rain may blow out and muddy the water
- Heavy rain/storms likely
How Do You Fish a 7.2/10 Day?
See the fly patterns built for today's conditions, where the fish are holding, and how to work the 5:30 AM - 9:00 AM, 6:00 PM - 8:00 PM window.
Today's Weather
See hourly conditions, wind speeds, barometric pressure, and 5-day outlook
USGS Water Monitoring
Real-time data from 3 monitoring stations
See station-by-station details, historical ranges, and trend analysis
What's Hatching This Month
Rocky Mountain West — typical for July
7.2/10 Today — See the Full San Juan River Breakdown
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San Juan River Fly Fishing — FAQ
Is the San Juan River fishing well right now?
DriftWise scores the San Juan River every morning on a 0–10 fishability scale that weighs real-time USGS flow and water temperature, National Weather Service forecasts, and lunar data. Check the live fishability score and condition summary above for today's rating before you head out.
What is the current water flow on the San Juan River?
The San Juan River's flow is tracked by USGS streamflow gauges near Blanco, San Juan County, New Mexico and refreshed daily in the condition summary above. Flow is reported in cubic feet per second (cfs) and compared against the seasonal average so you can see whether the river is running high, low, or normal.
What is a good water temperature for trout on the San Juan River?
Trout feed most actively when water temperatures sit roughly between 48°F and 62°F. DriftWise reads live San Juan River water temperature from USGS sensors near Blanco, San Juan County, New Mexico — see the summary above for the current value.
When is the best time of day to fish the San Juan River?
The most productive windows shift with the season: cold months fish best around midday (10 AM–2 PM) once the water warms, while summer rewards early mornings and evenings. Each San Juan River report factors in the current season.
Do I need a fishing license to fly fish the San Juan River?
Yes. A valid New Mexico fishing license is required to fish the San Juan River. Check current New Mexico regulations for seasons, limits, and any special catch-and-release or fly-fishing-only sections before you go.
Is the DriftWise San Juan River fishing report free?
Yes. The daily San Juan River condition summary — flow, water temperature, weather, and fishability score — is free. A free account (3 reports per month) unlocks the full AI analysis with fly-pattern recommendations and a detailed hatch forecast.
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