Fall trout season sets up as Susquehanna waters cool

What's biting

What's next

With a New Moon today, expect low-light windows at dawn and dusk to carry the best action, since dark nights reduce nighttime feeding pressure and push fish toward early and late feeding. Water that sits at 57 to 58°F should stay stable over the next few days if nights stay cool, which keeps trout active through midday on overcast afternoons.

On the smaller 209 cfs stream, lighter tippet and subtle presentations make sense. The lower flow means fish see more of your offering, so keep movement quiet. On the bigger water at 3,450 and 7,400 cfs, focus on softer seams and edges where fish hold out of the main push, and plan to fish streamers or weighted nymphs to get down.

MidCurrent's latest Tying Tuesday notes a beaded purple nymph built for low-light, overcast days, a handy pattern idea for gray fall mornings. Check state regulations and stocking notices through the PA Fish & Boat Commission before heading out, since seasons and special regulations vary by water.

Context

Mid-October typically marks the start of the cooler-water phase for central Pennsylvania rivers, when summer stress eases and trout feeding picks up. Readings in the upper 50s are on schedule for this point in the season. Brook Trout and Brown Trout are generally entering pre-spawn behaviour in the fall, which can make them more aggressive toward streamers, though anglers should be careful around spawning areas and check regulations on seasonal closures.