Flaming Gorge tailwater trout stay comfortable as late-summer flows hold steady
USGS gauge 09234500 on the Green River below Flaming Gorge Dam read 61°F with flow at 2,760 cfs as of Friday evening (Aug 22) — a comfortable, dam-buffered number while much of the Mountain West bakes through late-August heat. No shop or charter reports came through specifically on this stretch this cycle, so we're leaning on how this tailwater typically fishes at these readings: rainbow and brown trout stay active in cool, oxygenated tailwater flows even when air temps spike, and kokanee tend to hold deeper this time of year. Elsewhere in the Rockies, Flylab (Substack) noted trout still willing to eat in similarly cool water (61°F) on a Colorado freestone creek this summer, a decent regional signal that tailwater and high-elevation fisheries are holding up better than warmwater rivers right now. Check current Utah DWR regs before keeping fish.
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What's biting
What's next
With flow sitting near 2,760 cfs, expect the Green River below Flaming Gorge Dam to keep fishing more like early summer than late August — the dam release keeps temperatures buffered well below what freestone rivers see this time of year, which should keep trout metabolism and feeding windows more consistent through the next few days rather than collapsing into the classic midday lull warmwater fisheries get in this kind of heat.
If that 61°F reading holds or drops slightly overnight (typical for a dam-controlled system as upstream reservoir turnover continues into late summer), look for the best window to stretch later into the morning than it would on an unregulated river, with another push likely in the last two hours of daylight. Early risers and evening anglers should still get first crack at the most active fish, but the tailwater's stability means the window shouldn't be as narrow as what's being reported on freestone water elsewhere in the Rockies right now.
A Waxing Gibbous moon this week means brighter overnight light, which can push some low-light feeding activity earlier into dusk rather than deep into true darkness — worth factoring in if you're planning an evening session around last light.
No flow-change signal is visible in the current data, so plan around today's stage unless Flaming Gorge Dam operations shift releases for downstream needs later in the week — that's the one variable that can move quickly on a tailwater and change wading access or drift-boat conditions with little notice. Anglers running the tailwater by boat or wading should verify current release schedule before heading out, since a bump in cfs from dam operations can happen faster than surface conditions suggest.
Overall, the next 2-3 days look like more of the same: stable, trout-friendly water in a stretch that's largely insulated from the regional heat pattern showing up in the angler-intel feeds this week. Nothing in the current data points to a dramatic shift, so this reads as a steady, plannable window rather than a moment to chase a hot bite before it closes.
Context
Flaming Gorge Dam's bottom-release design is exactly why the Green River tailwater below it stays fishable through late-summer heat that shuts down warmwater fisheries elsewhere in the region — pulling cold water from deep in the reservoir keeps the river in the low-to-mid 60s even when surrounding air temps climb, which is a normal and expected pattern for this fishery in August, not an anomaly. A 61°F reading and roughly 2,760 cfs flow are both within the range this tailwater typically runs during summer recreation-season releases.
We don't have direct captain, shop, or state-agency reporting on this specific stretch in this cycle's angler intel, so we can't say with confidence whether the bite is running ahead of, behind, or on pace with a typical late-August week here — that's an honest gap rather than something we can paper over with a confident claim. The closest regional signal available is Flylab (Substack)'s note on a Colorado freestone creek fishing well at a comparable 61°F this summer, which at least suggests cool, well-oxygenated Rocky Mountain water is holding up better than warmwater rivers broadly right now — though that's a different river system in a different state, not a direct read on the Green River itself. Anglers with recent, on-the-water reports from this tailwater would meaningfully sharpen next week's update.
Synthesized from real-time NOAA buoy data, USGS stream gauges, and current reports across regional fishing blogs, captain updates, and angler forums. Check local regulations before keeping fish. Never trust a single source for a trip decision.
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