Mixed · Surrey

River Mole (Surrey)

River Mole (Surrey) — Rail bridge over River Mole

The Surrey Mole runs from Crawley through Horley, Dorking, Leatherhead and Esher to join the Thames at Hampton.

Poor · Brown Trout
CDC F-Fly · 18-20
Poorlive now
Not the day for it
River temperature is the limiting factor today, not the flow. This is not the day to push it. Check the thermal advice above before you head out.
90% confidence
What moved it
  • Level1.43 mDropping after lift
  • Water temp24.2°C
  • ClarityUnfishableColouring up
Today's fly
CDC F-Fly
CDC F-Fly18-20
Upstream dry, on top
Conditions on the water
Live gauge
Level
Steady
1.43 m
Dropping after lift
Water temp24.2°C
ClarityUnfishable
Weather33°C
WindS 12 km/h
Pressure1020 hPa
Rain · recent0.0 mm
Rain · ahead0.0 mm

The nearest gauge doesn't record temperatures, so we've estimated it — defer to the river keeper's advice.

Water temperature for Brown Trout
Welfare risk
24°C est.ideal 10–16°C
0°14°28°
How to fish it · for Brown Trout
When
Nymphing can work through most of the day.
Where
Cover mixed depths.
Method
Start with tight-line nymphs and adjust if fish rise or drift higher.
Kit
9 ft #4 rod, floating line, 12 ft tapered leader to 4–5 lb fluoro tippet.
Why this works
Water at 24.2°C. This is the line where catch-and-release kills brown trout. Do not fish for them today.
Hatch timeline · todayPeak at 6pm

Hatch predictions

Today's headline hatch shown — see all 3 active hatches hour by hour with Pro.

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Sub-surface · on the nymphunder the surface

Hatch predictions

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Beyond the hatch · worth watchingambient prey

Hatch predictions

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Evidence
Survey-backed · regionalHigh confidence

Backed by regional invertebrate surveys; no sampling on this exact reach yet.

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
Daddy Long LegsHatch
2
3
2
GrannomHatch
2
2
Evening SedgeHatch
2
3
3
3
2
Large Dark OliveHatch
1
2
2
1

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

Ranked for today
Brown Trout fly box

The heartland of English dry fly fishing. Upstream dry fly and emerger presentation dominates. Nymphing restricted or discouraged on many beats. Gin-clear alkaline water, prolific weed growth, educated wild brown trout. Precise imitation and delicate presentation are paramount.

Permits & access
Permit required — see local rules.
  • Private / coarse club.
What's coming
Plan ahead
5-day outlook
Cooler water nearby · 2
Probably above the Brown Trout safety line — these are likely cooler, but carry a thermometer.
Albury Estate Fisheries
16 km
~23°C
Rainbow trout · Brown trout
Halliford Mere
22 km
~23°C
Rainbow trout
Gallery · 2
  1. River Mole (Surrey) — Rail bridge over River Mole
    Rail bridge over River Mole
  2. Terrain map of the venue
    Terrain map
About this water

The Surrey Mole runs from Crawley through Horley, Dorking, Leatherhead and Esher to join the Thames at Hampton. Distinct from the Devon Mole. Mixed-use river — light trout interest on cleaner reaches around Dorking and Mickleham, otherwise coarse-fishing identity. Mostly private and club water.

  • Mixed
The full read · show the working · for Brown Trout · confidence 90%
How the 0 is built — score × weight = contribution
Temperature0 × 28%0.0
Flow80 × 22%17.6
Clarity0 × 18%0.0
Feeding Time60 × 13%7.8
Pressure80 × 7%5.6
Insect activity35 × 12%4.2
Limiting factor: Water temperature (24.2°C) is outside Brown Trout's preferred range (10–16°C)= 35
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitysurvey-backed invertebrate datasurvey
What would change the calculation
Cooler water — back toward the 10–16 °C ideal band — would lift the score and ease welfare.
A drop and clear would lift the flow and clarity scores.
The dawn and dusk windows score higher than the midday lull.
Directions
Apple MapsGoogle Maps
Seasons & zones
  • Trout 1 April → 30 September
Related guides
Trout Near Londonaccess guideEuro Nymphingsubsurface methods
Casting instructors near here
Booking & contacts