Local price scan
Cheapest petrol and diesel prices in Porthmadog
4 tracked forecourts in Porthmadog, last updated 28 September 2026. Prices are pence per litre.
Unleaded petrol (E10)
174.9p
cheapest · 176.4p average across 4 stations
Diesel (B7)
199.9p
cheapest · 202.2p average across 4 stations
Super unleaded (E5)
185.9p
cheapest · 192.9p average across 2 stations
Premium diesel
219.9p
cheapest · 219.9p average across 1 station
Porthmadog price history
Daily average standard petrol and diesel prices across tracked local stations over the last 90 days.
Porthmadog stations ranked by price
| Madog Garage / Hamdden Caravans LtdESSAR · LL49 9NY | 174.9p | 199.9p | — | — |
|---|---|---|---|---|
| PORTHMADOG SUPERSTORE - PETROL FILLING STATIONTESCO · LL49 9NU | 174.9p | 199.9p | 185.9p | — |
| Glanaber GarageGlanaber Garage · LL49 9TP | 177.9p | 203.9p | — | — |
| MFG PORTHMADOGSHELL · LL49 9LU | 177.9p | 204.9p | 199.9p | 219.9p |
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Where these stations are
What drivers in Porthmadog should know
The gap between the cheapest and most expensive forecourt in Porthmadog is currently 3.0p per litre. On a typical 55-litre fill that is about £1.65 — worth a short detour if a cheaper site is already on your route.
At 176.4p the average unleaded petrol (e10) price in Porthmadog is above the UK-wide average of 174.7p that PumpScan is tracking, a difference of 1.7p per litre.
Brands represented locally include Glanaber Garage, ESSAR, SHELL, TESCO. Supermarket forecourts usually undercut motorway services by a wide margin, and prices in and around Porthmadog tend to move within a day or two of a change in the wholesale oil price. Filling up mid-week and avoiding a near-empty tank on a motorway trip are the two simplest ways to keep costs down.
Compare Porthmadog against the rest of the country on the cheapest petrol in the UK and cheapest diesel in the UK leaderboards.
All filling stations in Porthmadog
- Glanaber GarageGLANABER GARAGE, BORTH-Y-GEST, PORTHMADOG, LL49 9TP, PORTHMADOG
- Madog Garage / Hamdden Caravans LtdPENAMSER GARAGE, PENAMSER ROAD, PORTHMADOG, LL49 9NY
- MFG PORTHMADOGHIGH STREET, PORTHMADOG, GWYNEDD
- PORTHMADOG SUPERSTORE - PETROL FILLING STATIONTESCO STORES LTD, STRYD FAWR, PORTHMADOG
Looking elsewhere? See all areas covered by PumpScan UK. Area slug: /petrol-prices/porthmadog