Stillwater · Mixed · Renfrewshire

Castle Semple Loch

Castle Semple Loch terrain map
Fair · Rainbow
Marabou Damsel · 8-12
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Buzzer on Castle Semple Loch
Useful ripple, fishable wave. Worth a session if the wind holds.
57% confidence

Castle Semple Loch is often best in spring through autumn.

What moved it
  • WindW 22 km/hModerate breeze
Today's fly
Marabou Damsel
Marabou Damsel8-12
Retrieve, sub-surface
Conditions on the water
Live gauge
Wind
Moderate breeze
W 22 km/h
N
W
from the west
Wave40 cm chop
Water temp
Air temp17°C
CloudOvercast
Pressure1018 hPa
Rain · recent0.0 mm

Some readings unavailable — check directly before fishing.

How to fish it · for Rainbow
When
The buzzer is on. Daddy Longlegs may also come into play as the day warms. The breeze will be blowing terrestrial insects onto the water — check the wind lanes and downwind margins for rising fish.
Where
Work Black Pennell on the bob, Ke-He on the middle dropper, and Marabou Damsel on the point.
The plan
Plan A

Work Black Pennell on the bob, Ke-He on the middle dropper, and Marabou Damsel on the point.

Plan B

If the main plan is not working, switch to a smaller, more imitative pattern fished slower and deeper. A change of drift angle can also make a difference.

Watch for

Watch for Sedge towards evening — this could be the best window of the day.

Boat — at anchor

Windy conditions suit anchoring in productive areas rather than open-water drifting.

Sub-surface · on the nymphunder the surface

Hatch predictions

Top nymph shown — see all 2 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
Trout seasonSeason
1
2
2
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
57%
Cloud50%
Wind30%
Temp100%

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

Other water nearby · 5
Why this score
  • Wind conditions (windy) are not ideal for this water.
  • Temperature (cool) is in the sweet spot for summer fishing.
  • Buzzer is in its seasonal window, boosting the chance of targeted feeding.
Directions
Seasons & zones
  • Trout 15 March6 October
Related guides
Casting instructors near here
Booking & contacts