Nant y Groes is a small Welsh stream system spanning 6.5km through rural terrain, offering intimate fly-fishing opportunities in a pristine upland setting. The river features clear, fast-flowing water over rocky substrates typical of Welsh hill streams, providing excellent habitat for wild trout. Best fished during spate conditions when water levels rise, offering challenging but rewarding angling in unspoilt countryside.
The statutory close season on Nant y Groes runs 15 March – 15 June (rivers, England & Wales). No coarse fishing is permitted during this period. Beyond the rod licence, fishing rights on Nant y Groes are typically held by local angling clubs — check with the relevant club or day ticket provider before visiting.
Water level data from the Environment Agency Real Time Flood Monitoring API. Nearest gauging station. Always verify conditions on arrival.
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Nant y Groes holds brown trout, sea trout, grayling, bullhead.
An EA rod licence is required by law to fish Nant y Groes. Club membership or a day ticket is also required on most stretches.
To fish Nant y Groes, you need a valid EA rod licence, available online from gov.uk. Annual, day and 8-day licences are available. In addition to the rod licence, you will need club membership or a day ticket from the controlling angling club or riparian owner for most stretches of Nant y Groes.
Always check conditions before you visit. Water quality, access and rules can change seasonally. The EA's Catchment Data Explorer provides up-to-date water quality information for Nant y Groes.
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