Steady, warm Colorado River flows keep Arizona's fall turn waiting

What's next

Expect little swing over the next two to three days. Water in the low 70s and steady flow near 10,000 cfs suggest the river is holding its current pattern rather than turning over, and this week's Full Moon tends to concentrate feeding activity around dawn, dusk, and overnight hours rather than midday. River predators like smallmouth bass typically key on baitfish activity as light drops, a pattern that holds across bass fisheries nationally this time of year, so the first and last hour of daylight are worth building a weekend trip around.

Worth watching: the two downstream sites are currently reporting temperature only, with no flow readings. If either shows a five-degree drop on the next check, that would mark the start of the real fall transition, when fish typically shift toward faster water and structure and feeding windows widen as temperatures fall out of the low 70s.

Context

Water in the 70-71°F range is on the warm side for late September but not unusual for the Colorado River system in Arizona, where controlled releases keep temperatures steadier than a freestone river would run at this elevation and latitude. The region sits in the early stages of its fall transition, the stretch where water temperature becomes the dominant variable in fish location and feeding timing. A more pronounced cool-down typically follows over the next several weeks, and until it arrives, conditions here read closer to late summer than deep fall.