Spate · Mixed · Cumbria

River Cocker

River Cocker venue image
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The Cocker is a Lake District trout river — a Derwent tributary running from the Buttermere/Crummock Water valley through the Lorton Vale to join the Derwent at Cockermouth.

Good · Brown Trout
Pheasant Tail Nymph · 14-16
Goodlive now
A proper day on the water
River steady at a fishable height. A proper day for it. Work the seams with an upstream nymph, switch to the dry when they show.
75% confidence
What moved it
  • Level0.89 mDropping in the last 6h
  • Water temp14.4°C
  • ClarityClear
Today’s fly
Pheasant Tail Nymph
Pheasant Tail Nymph14-16
Upstream, sub-surface
Conditions on the water
Live gauge
Level
Steady
0.89 m
Dropping in the last 6h
Water temp14.4°C
ClarityClear
Weather12°C
WindSE 3 km/h
Pressure1021 hPa
Rain · recent5.4 mm
Rain · ahead8.3 mm

Live readings — water temperature is an estimate where the gauge does not record it.

Water temperature for brown trout
Ideal
14°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 temperature is working for you, but time of day is the limiting factor today.
Hatch timeline · todayQuiet day

Hatch predictions

Today's headline hatch shown — see all 7 active hatches hour by hour with Pro.

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Evidence
Survey-backed · regionalModerate confidence

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

Through the year
0–3 scale · July highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Trout seasonSeason
1
2
2
2
2
2
1
Daddy Long LegsHatch
2
3
2
March BrownHatch
2
3
2
GrannomHatch
2
2
Large StoneflyHatch
2
3
2

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

Ranked for today
Brown Trout fly box
Permits & access
Permit required — see local rules.
  • Penrith AA / private.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Ennerdale Water
15 km
Brown trout
River Ehen
18 km
Brown trout · Salmon · Sea trout
Ullswater
32 km
Brown trout
Annan
37 km
82
Brown trout · Salmon · Sea trout
River Eamont
40 km
22
Brown trout · Grayling
Gallery · 1
  1. Terrain map of the venue
    Terrain map
About this water

The Cocker is a Lake District trout river — a Derwent tributary running from the Buttermere/Crummock Water valley through the Lorton Vale to join the Derwent at Cockermouth. Lake-fed flows from Crummock give it some stability; lower freestone character. Wild brown trout, no salmon. Penrith Angling Association covers some water.

  • Mixed
The full read · show the working · for brown trout · confidence 75%
How the 79 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time40 × 13%5.2
Pressure80 × 7%5.6
Insect activity47 × 12%5.6
Conditions total= 79
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitysurvey-backed invertebrate datasurvey
What would change the calculation
The dawn and dusk windows score higher than the midday lull.
Directions
Apple MapsGoogle Maps
Seasons & zones
  • Trout22 March → 30 September
Related guides
Yorkshire & SpidersNorth Country methodsTrout Near Londonaccess guideEuro Nymphingsubsurface methods
Booking & contacts