A southerly has held for 9 hours, running warmer than the water (18°C air against 17°C water). Expect fish at the northern end — the bank it is blowing into — where the drift piles food, colour and warmth together. This reads the upper water, though — a bottom bait at range feels it far less than a floater or a fish in the margins. Treat it as a tiebreaker between good swims rather than an override — features and angling pressure usually count for more.
Start with Viva (10-12) on a figure-of-eight with occasional strip. 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.
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 towards evening — this could be the best window of the day.
In wind, bank fish the lee shore — boats can anchor in productive areas if conditions allow.
Hatch predictions
Top nymph shown — see all 4 guilds as a supporter.
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Hatch predictions
Top prey shown — see all 5 as a supporter.
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Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.
Traditional wild-trout llyn fishing. Wet flies and dabblers stay central, with buzzer, caddis, terrestrials and occasional small fry patterns becoming important as the season warms.
A reasonable day here, though wind isn't quite in the sweet spot.
434-acre lowland reservoir near Pontypool. Stocked rainbow and brown trout fishery with boat and bank access. This location also provides access to the Usk River section that feeds the reservoir — managed via fishingpassport.co.uk. Lower altitude than Brenig/Clywedog — warmer, longer season. Good all-round stillwater with buzzer, damsel and lure fishing all productive. Visitor centre and cafe.
NRW WFD Cycle 3 (lake) — Llandegfedd Reservoir: Moderate ecological status. Re-tagged 2026-06-18 from a river reach to the reservoir's own lake waterbody (was recorded Good). Source: NRW DataMapWales WFD Cycle 3 classification layer.
NRW (Wales) · GB30941363
434-acre lowland reservoir near Pontypool.
A southerly has held for 9 hours, running warmer than the water (18°C air against 17°C water). Expect fish at the northern end — the bank it is blowing into — where the drift piles food, colour and warmth together. This reads the upper water, though — a bottom bait at range feels it far less than a floater or a fish in the margins. Treat it as a tiebreaker between good swims rather than an override — features and angling pressure usually count for more.
Start with Viva (10-12) on a figure-of-eight with occasional strip. 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.
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 towards evening — this could be the best window of the day.
In wind, bank fish the lee shore — boats can anchor in productive areas if conditions allow.
Hatch predictions
Top nymph shown — see all 4 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.
Traditional wild-trout llyn fishing. Wet flies and dabblers stay central, with buzzer, caddis, terrestrials and occasional small fry patterns becoming important as the season warms.
A reasonable day here, though wind isn't quite in the sweet spot.
434-acre lowland reservoir near Pontypool. Stocked rainbow and brown trout fishery with boat and bank access. This location also provides access to the Usk River section that feeds the reservoir — managed via fishingpassport.co.uk. Lower altitude than Brenig/Clywedog — warmer, longer season. Good all-round stillwater with buzzer, damsel and lure fishing all productive. Visitor centre and cafe.
NRW WFD Cycle 3 (lake) — Llandegfedd Reservoir: Moderate ecological status. Re-tagged 2026-06-18 from a river reach to the reservoir's own lake waterbody (was recorded Good). Source: NRW DataMapWales WFD Cycle 3 classification layer.
NRW (Wales) · GB30941363
