Stockbridge caddis briefing
River Test below Stockbridge: early‑August caddis briefing
Early August on the River Test below Stockbridge brings the evening caddis pulse; trout lock on seams at the tail of glides and the inside edge of bends. Low summer flows have narrowed feeding lanes, so the soft shoulder where faster water meets slow glide is the productive water. Fish concentrate in visible speed lines rather than the channel centre and pick off emergers, drowned adults and midges through late light.
Where seams form
Seams form where riffle speed bleeds into a glide: the junction of main current and softer margins, tails of glides and gravel shoulders. On chalk‑stream water around Stockbridge those seams collect drifting caddis, olives and sedges; trout patrol them hard at dusk and first light.
Low flows make trout selective and more visible. Drag‑free presentation, long leaders and fine tippet beat bulkier patterns. Best August choices mix small olives, sedges and midges with CDC patterns on the film. The CDC Shuttlecock or Shuttlecock Black CDC are reliable for sipping fish; for clear caddis rises an Elk Hair Caddis or a small Buzzer/emerger in the film at dawn and dusk often triggers takes.
Evening pulses often start half an hour before last light and can stretch into late evening; morning emergers hold through first light until the sun warms the gravel. Today flows are slightly low but fishing remains good if anglers target seams on the Stockbridge beats and favour stealth over brute presentation.