Rio Grande eases into its fall flow transition

What's next

Expect both gauges to continue stepping down gradually over the next few days as upstream irrigation demand tapers for the season, which should bring clearer water and better wading conditions on the reaches these readings represent. At 68°F the water is still on the warm side for cold-water fish, so dawn and dusk remain the stronger windows this week, when temperatures dip closer to the range trout prefer. The Last Quarter moon points toward steadier, less spiky activity patterns rather than a big feeding push, so timing around the cooler parts of the day matters more than timing around the moon this week.

Watch the flow trend into the weekend. A continued pullback on both gauges would confirm the fall transition is firming up and would be the signal to plan around.

Context

Early October typically marks this region's shift from summer irrigation-season flows into the steadier, cooler conditions of fall, and this week's two readings track that pattern rather than running ahead of or behind schedule. The San Juan side of the region generally holds more stable temperatures year-round than the Rio Grande's more weather-exposed water, so anglers splitting time between the two should expect more week-to-week swings on the Rio Grande side this time of year.