Smallmouth bass hit post-spawn stride on the Susquehanna and Allegheny

What's Biting

What's Next

Over the next two to three days, the warmth that pushed main-stem temps to 69°F is likely to hold or nudge slightly higher as we move deeper into June. Keep an eye on USGS gauge 01540500 — any precipitation-driven flow spike above the current 8,780 cfs will color up the river and push bass tighter to current breaks, woody debris, and tributary mouths rather than open-water structure.

For smallmouth, this is the highest-quality window of the season. Tactical Bassin's post-spawn coverage notes that fish are feeding but not always chasing hard — a chatterbait worked along the edges of outside flats in 4–8 feet of water, or a neko rig soaked on rocky transitions, should be the first setup on the deck. Wired 2 Fish highlights summer offshore bass fishing with a two-lure finesse approach built around forward-facing sonar for locating Allegheny smallmouth scattered across deep gravel runs — worth adding to the rotation if you're running electronics.

Timing windows favor the first two hours after sunrise and the last 90 minutes of light. The current waning gibbous moon phase typically correlates with active pre-dawn and evening feeding pushes in river systems, making early starts particularly rewarding. Midday heat will push fish deeper as surface temps continue climbing through June.

Walleye anglers have a productive window this week. At 69°F the bite should be solid through dawn and dusk; drift-bouncing nightcrawlers or soft plastics along gravel runs and rocky ledges in the 10–15 foot range is the consistent June approach for Susquehanna walleye. Channel catfish will be active — nightly outings with cut bait in deep river bends and just downstream of tributary mouths should produce well as the warming water concentrates fish in predictable holding lies.

For trout, Hatch Magazine's recent coverage on fishing through warm conditions reinforces the play: skip the main stem and focus on cold tributary headwaters with groundwater influence, targeting the first two hours of daylight before air temperature peaks. Check current PA regulations for any warm-water voluntary closure advisories before pursuing main-stem trout.

Context

Early June is traditionally the beginning of the prime smallmouth window on the Susquehanna and Allegheny. Post-spawn fish — fully recovered and feeding aggressively — typically stage through June before the height-of-summer doldrums push some fish deeper into cooler, oxygenated lies. A 69°F reading on June 2 is right in the expected range for this drainage at this time of year; the Susquehanna's main stem typically crosses the 65°F threshold in late May and climbs toward the low 80s by late July.

The 8,780 cfs reading at USGS gauge 01540500 is moderately elevated for early June, likely reflecting recent precipitation or lingering late-spring watershed runoff. In a typical year, flows settle toward lower, clearer conditions by mid-June — and that drop tends to coincide with the best topwater and sight-fishing opportunities for smallmouth. Anglers who have fished this stretch through prior Junes know to watch the gauge and plan a trip around the first clear, moderate-flow window.

No direct PA-specific angler intelligence from regional guides, shops, or charter captains was available in this reporting cycle. PA Fish & Boat's biologist report page was present in the intel feed but yielded no current catch or conditions data for the Susquehanna or Allegheny drainage. Context here is drawn from gauge readings and broad seasonal patterns consistent with the mid-Atlantic and Appalachian river belt rather than on-the-ground trip reports.

What the national fishing community does confirm: Tactical Bassin and Fishing the Midwest both frame early June as one of the strongest freshwater river periods of the year — warm enough for aggressive bass, not yet hot enough to lock fish into deep thermal refuges. If that pattern holds for central and western Pennsylvania this season, anglers have a solid two-to-three-week window of high-quality action before peak summer heat fully sets in.