Mixed · Surrey, GB-ENG

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.

Tomorrow · Closed season
Black Gnat
Forecast · Tomorrow
Closed season
Out of season. Try elsewhere.
45% projected
Today's fly
Black Gnat
Black Gnat
Conditions on the water · Tomorrow
Live gauge
Level
Rising
0.88 m
Lifting fast
Water temp16.4°C
ClarityVery coloured
Weather19°C
WindN 17 km/h
Pressure1013 hPa
Rain · recent0.7 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
Warm — slow
16°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
Good — water clarity is right today, though time of day could be better.
Likely species
Stoneflies
Caddisflies
Gammarids
Hatch timeline · tomorrowPeak at 12pm

12pm(now) — Heather Fly

Stage: Terrestrials on topApproach: Dry flyActivity: 69%
Also:Reed Smut47%Cinnamon Sedge28%Autumn Dun23%
Peak emergence windowWeather boost10 food groups active

Peak activity at 12pm — Heather Fly (Heather Fly, Peak emergence window)

Sub-surface · on the nymphunder the surface

Hatch predictions

Top nymph shown — see all 3 guilds as a supporter.

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Beyond the hatch · worth watchingambient prey(1)

Hatch predictions

Top prey shown — see all 5 as a supporter.

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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 · September 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
CapererHatch
2
3
3
2
Hawthorn FlyHatch
2
2
GrannomHatch
2
2

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
Other water nearby · 5
Albury Estate Fisheries
16 km
Rainbow trout · Brown trout
Coltsford Mill Trout Fishery
18 km
Rainbow trout · Brown trout · Brook trout
River Wandle
20 km
0
Brown trout · Barbel · Chub
Hazel Copse Trout Fishery
21 km
Rainbow trout · Brown trout
Halliford Mere
22 km
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
Water quality (WFD)
  • Ecology: Moderate
Water quality details
  • Dissolved oxygen: Good
  • Ammonia (Phys-Chem): Poor
  • pH: High
  • Phosphate: Poor
  • Temperature: High

EA (England) · GB106039017625

The full read · show the working · for Brown Trout · confidence 90%
How the 75 is built — score × weight = contribution
Temperature64 × 28%17.9
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time60 × 13%7.8
Pressure80 × 7%5.6
Insect activity74 × 12%8.9
Conditions total= 75
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.
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