A southerly has held for 6 hours, running colder than the water (4°C air against 7°C water). The end it blows into is taking that chilled surface water, so try the sheltered southern end instead — off the back of the wind, where the undertow returns food along the bottom. That chill sits in the top of the water, though, and the bed is slower to feel it — on a bottom bait it is the undertow, not the temperature, that puts you at this end. Treat it as a tiebreaker between good swims rather than an override — features and angling pressure usually count for more.
Set up a broadside drift and cover the water systematically. Work a bushy searching pattern on the bob and drop a contrasting nymph on the point.
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.
Keep an eye on changing conditions — wind shifts and cloud breaks can trigger short feeding spells.
Bank-only venue. Fish from accessible margins, points, weed edges, and inflows.
Hatch predictions
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Fly recommendations
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Boat-friendly, competition-influenced, often wind-driven, with strong top-of-water periods but also classic deep searching and washing-line phases.
A good match for Cregennan Lakes — most conditions are close to what it fishes best in.
The setting — open mountain lake, wide sky, and the presence of the mountain — is as much the point as the fishing. Wild and stocked trout in low-nutrient upland water, typical of the Ordovician volcanic and mudstone geology of Cadair Idris. The car park is reached via a narrow road from Arthog; access and stocking arrangements vary by season.
Two small natural lakes owned by the National Trust, set at the foot of Cadair Idris in the southern Snowdonia National Park near Dolgellau.
A southerly has held for 6 hours, running colder than the water (4°C air against 7°C water). The end it blows into is taking that chilled surface water, so try the sheltered southern end instead — off the back of the wind, where the undertow returns food along the bottom. That chill sits in the top of the water, though, and the bed is slower to feel it — on a bottom bait it is the undertow, not the temperature, that puts you at this end. Treat it as a tiebreaker between good swims rather than an override — features and angling pressure usually count for more.
Set up a broadside drift and cover the water systematically. Work a bushy searching pattern on the bob and drop a contrasting nymph on the point.
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.
Keep an eye on changing conditions — wind shifts and cloud breaks can trigger short feeding spells.
Bank-only venue. Fish from accessible margins, points, weed edges, and inflows.
Hatch predictions
Top nymph shown — see all 2 guilds as a supporter.
Start free trial14-day free trial. Cancel anytime.
Hatch predictions
Top prey shown — see all 5 as a supporter.
Start free trial14-day free trial. Cancel anytime.
Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.
Fly recommendations
Point fly shown — supporters see the whole team, sizes and why.
Start free trial14-day free trial. Cancel anytime.
Boat-friendly, competition-influenced, often wind-driven, with strong top-of-water periods but also classic deep searching and washing-line phases.
A good match for Cregennan Lakes — most conditions are close to what it fishes best in.
The setting — open mountain lake, wide sky, and the presence of the mountain — is as much the point as the fishing. Wild and stocked trout in low-nutrient upland water, typical of the Ordovician volcanic and mudstone geology of Cadair Idris. The car park is reached via a narrow road from Arthog; access and stocking arrangements vary by season.
Cregennan Lakes is a lake in North Wales / Gwynedd (Snowdonia). Its recorded elevation is about 311 m above sea level and the catchment geology is volcanic. Our data lists brown trout and rainbow trout here. Best window recorded for anglers: May–August. Core methods listed: Traditional loch wet fly; dry fly on calm days; small nymph in margins. Nearby waters in our listings include Afon Eden (Welsh) at 14 km, Llyn Cwm Nantcol at 17 km and Llyn Conach at 19 km.
