Live fuel prices from 32 stations across Gwynedd. Find the cheapest petrol and diesel near you.
ASDA LLANGEFNI SUPERMARKET currently leads on price in Gwynedd at 149.7p — 85.7p below the city average. Filling a 55-litre tank here saves you £47.16 vs the average station.
The cheapest petrol in Gwynedd today is at ASDA LLANGEFNI SUPERMARKET (LL77 7DW) at 149.7p per litre. Prices are updated every 30 minutes from the official UK Government Fuel Finder data.
The average petrol (E10) price in Gwynedd is currently 235.4p per litre, which is 78.6p above the UK national average of 156.8p. Supermarket stations like Tesco and Asda typically offer the lowest prices.
The cheapest diesel (B7) in Gwynedd is currently 177.9p per litre at Bryn Llwyd Services. The average diesel price across Gwynedd is 278.5p.
Fuel prices across Gwynedd are updated every 30 minutes. All major UK fuel retailers are legally required to report prices to the government's Fuel Finder scheme, which FuelSignal pulls from automatically.
Supermarket fuel stations — Tesco, Asda, Morrisons, and Sainsbury's — are almost always the cheapest in Gwynedd, typically 4–8p per litre below branded stations like Shell and BP. Among non-supermarket brands, JET and Gulf often offer competitive prices.
Gwynedd petrol prices are currently 78.6p per litre above the UK national average of 156.8p. Filling up at a supermarket station can help reduce costs.
To save money on petrol in Gwynedd: (1) Use supermarket stations which are typically 5–8p cheaper than branded forecourts. (2) Avoid filling up near motorway services which charge a significant premium. (3) Use FuelSignal to compare all 32 stations in Gwynedd and find the cheapest price near you before you travel.