Stillwater · Mixed · London / Waltham Forest

Walthamstow Reservoirs

Walthamstow Reservoirs venue image

London’s most significant fly fishing venue — a chain of Victorian reservoirs in the Lee Valley managed by Thames Water.

Fair · Rainbow
Marabou Damsel · 8-12
Fairlive now
Reasonable summer fishing likely at Walthamstow Reservoirs
Water temperature is the limiting factor today, not the wave. Fish dawn or dusk if you go at all, and handle everything with extra care.
57% confidence
What moved it
  • WindSE 6 km/hLight breeze
Today's fly
MD
Marabou Damsel8-12
Retrieve, sub-surface
Conditions on the water
Live gauge
Wind
Light breeze
SE 6 km/h
N
SE
from the south-east
WaveRipple
Water temp—
Air temp30°C
CloudClear
Pressure1021 hPa
Rain · recent0.0 mm

Some readings unavailable — check directly before fishing.

How to fish it · for Rainbow
When
Conditions are not ideal but fishable at Walthamstow Reservoirs. The ripple should help fish move and feed more confidently. Very warm conditions — trout have a narrower safe zone of cool, oxygen-rich water. Fish only at first light or last light, use barbless hooks, keep fish in the water during release, and stop if fish struggle to recover. Early morning is often the most productive window in summer — make the most of it.
Where
Start with Marabou Damsel (8-12) — on the point. Rainbows respond to more active retrieves — try short strips between pauses. If that does not produce, switch depth or speed before changing the pattern entirely.
The plan
Plan A

Start with Marabou Damsel (8-12) — on the point. Rainbows respond to more active retrieves — try short strips between pauses. If that does not produce, switch depth or speed before changing the pattern entirely.

Plan B

Fish early and late, try deeper during the heat of the day with a fast-sinking line.

Watch for

Damsel Nymph may strengthen through the middle of the day as conditions warm.

Bank

Bank-only venue. Fish from accessible margins, points, weed edges, and inflows.

Beyond the hatch · worth watchingambient prey

Hatch predictions

Top prey shown — see all 3 with Pro.

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Through the year
0–3 scale · August highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Trout seasonSeason
1
2
2
2
2
1
Daphnia SwarmHatch
2
3
3
3
2
Daddy Long LegsHatch
2
3
2
Lake OliveHatch
2
3
3
3
3
3
2
Silverhorns & LonghornsHatch
1
2
2
2
1

Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.

Ranked for today
Rainbow fly box
What's coming
Plan ahead
5-day outlook
Condition match
55%
Cloud25%
Wind100%
Temp25%

A reasonable day here, though temperature isn't quite in the sweet spot.

Other water nearby · 5
Norton Fishery
16 km
Rainbow trout
Thornwood Springs Trout Fishery
16 km
Rainbow trout · Brown trout
River Wandle
23 km
Brown trout · Barbel · Chub
Rib Valley Fishing Lakes
26 km
Rainbow trout · Brown trout
Redbournbury Fishery
31 km
Rainbow trout
Gallery · 1
  1. Terrain map of the venue
    Terrain map
About this water

London’s most significant fly fishing venue — a chain of Victorian reservoirs in the Lee Valley managed by Thames Water. Reservoirs 4 and 5 offer day-ticket fly fishing; East Warwick is members-only catch-and-release. All bank fishing only — no boats. The deep concrete-banked margins put 15–20 feet of water within casting range, making depth control and straight-line buzzer technique the key skills. Around 11,000 rainbow and brown trout stocked across the season. Excellent public transport access (Blackhorse Road tube, 10-minute walk) makes this a genuine after-work option for London anglers.

  • Reservoir
  • Mixed
Why this score
  • Wind conditions (ripple) closely match what this water fishes best in.
  • High temperatures may push fish deeper and reduce surface activity.
  • Damsel Nymph is in its seasonal window, boosting the chance of targeted feeding.
Directions
Apple MapsGoogle Maps
Seasons & zones
  • Trout 1 April → 30 September
Related guides
Big Stillwater Playbookreservoir tacticsReservoir Entomologymatching the hatchThermal Layers & Troutreading depth and temperature
Casting instructors near here
Booking & contacts
Clubs & associations