Stillwater · Peat · North East / County Durham, GB-ENG

Grassholme Reservoir

Grassholme Reservoir terrain map

A medium reservoir in Upper Teesdale, set in the moorland above Barnard Castle with four miles of bank and a series of bays and inlets that give it more edge than a single-basin water of the same size.

Fair · Rainbow
Marabou Damsel · 8-12
Fairlive now
Reasonable summer fishing likely at Grassholme Reservoir
Good wave on — drift country. A useful wave. Work the productive shore.
56% confidence

Grassholme Reservoir is often best in spring through autumn.

What moved it
  • WindW 15 km/hGentle breeze
Today's fly
Marabou Damsel
Marabou Damsel8-12
Retrieve, sub-surface
Conditions on the water
Live gauge
Wind
Gentle breeze
W 15 km/h
N
W
from the west
Wave20 cm ripple
Water temp
Air temp12°C
CloudOvercast
Pressure1019 hPa
Rain · recent0.0 mm

Some readings unavailable — check directly before fishing.

How to fish it · for Rainbow
When
May–September
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

If the main plan stalls, drop to a size 14–16 midge — switch to a washing-line or suspender rig and change drift line before you change food group.

Watch for

Sedge should come on through the afternoon as the water warms.

Bank

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

Sub-surface · on the nymphunder the surface

Hatch predictions

Top nymph shown — see all 4 guilds with Pro.

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Beyond the hatch · worth watchingambient prey

Hatch predictions

Top prey shown — see all 5 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
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
59%
Cloud50%
Wind65%
Temp60%

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

Other water nearby · 5
About this water

A medium reservoir in Upper Teesdale, set in the moorland above Barnard Castle with four miles of bank and a series of bays and inlets that give it more edge than a single-basin water of the same size. Fly and bait both allowed; locally farmed stock with the occasional tagged fish carrying a cash prize.

  • Reservoir
  • Peat
Why this score
  • Buzzer is in its seasonal window, boosting the chance of targeted feeding.
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