12pm(now) — Autumn Olive
Peak activity at 12pm — Autumn Olive (Autumn Olive, Peak emergence window)
Hatch predictions
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Hatch predictions
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Backed by regional invertebrate surveys; no sampling on this exact reach yet.
Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.
Cooling water through autumn into winter pulls perch deeper — down to 4–8 metres on stillwaters, tight to bottom structure on canals and rivers. Jig flies and balanced patterns become essential because they keep the fly in the strike zone vertically rather than skating it through. Slow everything down: longer pauses, slower retrieves, indicator setups for sulking fish. The biggest perch of the year often come in this window for anglers willing to fish patient and deep.
Once written off as ecologically dead, it now supports brown trout again alongside a proper mixed coarse fishery. The appeal is not grand private-chalkstream elegance but close-quarters stalking, tricky little glides, undercut banks, bridge water, public-park access and a strong conservation story.
EA (England) · GB106039023460
London's most famous urban chalkstream: a short, intimate, heavily restored river flowing from the chalk-fed headwaters around Croydon and Carshalton through Morden, Wimbledon and Wandsworth to the Thames.
12pm(now) — Autumn Olive
Peak activity at 12pm — Autumn Olive (Autumn Olive, Peak emergence window)
Hatch predictions
Top nymph shown — see all 4 guilds as a supporter.
Start free trial14-day free trial. Cancel anytime.
Hatch predictions
Top prey shown — see all 3 as a supporter.
Start free trial14-day free trial. Cancel anytime.
Backed by regional invertebrate surveys; no sampling on this exact reach yet.
Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.
Cooling water through autumn into winter pulls perch deeper — down to 4–8 metres on stillwaters, tight to bottom structure on canals and rivers. Jig flies and balanced patterns become essential because they keep the fly in the strike zone vertically rather than skating it through. Slow everything down: longer pauses, slower retrieves, indicator setups for sulking fish. The biggest perch of the year often come in this window for anglers willing to fish patient and deep.
Once written off as ecologically dead, it now supports brown trout again alongside a proper mixed coarse fishery. The appeal is not grand private-chalkstream elegance but close-quarters stalking, tricky little glides, undercut banks, bridge water, public-park access and a strong conservation story.
EA (England) · GB106039023460
River Wandle is a chalk stream in London, England. The catchment geology is recorded as chalk, and the water sits at about 23 m above sea level. The river is described as roughly 14 km long. Our data lists 7 species here, including brown trout, barbel and chub. The trout season is recorded as running from 1 April to 30 September. The coarse season is recorded as running from 16 June to 14 March. Best window recorded for anglers: April to June for trout; autumn for chub and barbel. Core methods listed: short-range nymphing; upstream dry fly; small streamers. Level and flow data for this water is linked from the gauge “Carshalton Ponds (source, 4159TH) + Beddington Park (4150TH) + Hackbridge (4165TH) + Wandle Park Merton (lower, 4180_w1TH)”. Its Water Framework Directive ecological status is recorded as moderate. Nearby waters in our listings include Halliford Mere at 17 km, River Mole (Surrey) at 20 km and Coltsford Mill Trout Fishery at 21 km.
Stoneflies
Gammarids
