Catskills and Adirondack trout streams ease into terrestrial season

What's biting

What's next

With one gauge running comparatively high at 149 cfs and the other quite thin at 13.3 cfs, expect flow conditions to vary a lot by drainage over the next few days — check both before committing to a stretch, especially if you're picking between a bigger river and a smaller tributary. Without a fresh precipitation signal in hand, the safest assumption for late August is a slow, steady drawdown on the lower-flow gauge unless rain moves through, which typically means more exposed structure and spookier fish in skinny pools.

If the terrestrial pattern that Flylords Mag flagged holds, grasshopper and ant patterns should keep producing through the next several days, particularly during the warmest stretch of the afternoon when hoppers are most active along grassy banks and mowed edges near the water. As aquatic hatches continue to thin toward month's end, that terrestrial window is likely to become the more reliable player over traditional mayfly or caddis emergences, especially on the lower, warmer-running gauge.

Plan around the coolest parts of the day. Early morning and last light are the highest-percentage windows for trout right now, both for comfort (angler and fish) and for feeding activity, since water is warmest and lowest in oxygen during midday in late summer. If you're on the higher-flow water near 149 cfs, that extra volume likely keeps temperatures a bit more stable through the day than the thinner gauge, so it may be the better bet if afternoon temperatures climb.

For readers weighing trout streams against still water, the Adirondack lake smallmouth bite described by Flylab (Substack) is worth keeping in the back pocket for this weekend — when a stream is running low and warm, a nearby lake can be the more productive, more fish-friendly option. No tide or coastal timing applies here, so the main scheduling variable is simply chasing the cooler parts of the day and watching for any rain that would bump the lower gauge back up. Recheck both gauge readings before you head out, since a 13 cfs reading can change quickly with even modest rainfall.

Context

Late August in the Adirondacks and Catskills typically means low, clear water on many trout streams, warmer afternoon temperatures pushing fish into shaded lies and deeper pools, and a shift in the feeding calendar from aquatic hatches toward terrestrial insects like hoppers, ants, and beetles — which lines up with what Flylords Mag describes in its current tying feature on hopper patterns for exactly this kind of tailwater and small-stream water in August. Nothing in the available data suggests this year is running unusually early or late; the flow spread between the two gauges (149 cfs versus 13.3 cfs) is consistent with normal variation between a larger river and a smaller or more regulated tributary at this point in summer, though we don't have historical averages for either site on hand to say definitively whether either reading is above, below, or right at typical late-August levels. Neither gauge reported a water temperature, which limits how confidently we can flag heat-stress risk beyond the general late-summer caution anglers already apply. The angler-intel feed available for this report leans heavily on national and other-region content rather than direct NY trout-stream dispatches, so beyond the general terrestrial-season signal and the one Adirondack lake smallmouth mention, we don't have close-in, stream-specific testimony to compare against a typical season here. Worth checking a state or regional source directly for a fuller read on how this season is trending.