Petrol (Unleaded) in Porthmadog costs from 167.5p to 171.5p a litre right now, 170.0p on average across 4 stations. Diesel in Porthmadog costs from 189.4p to 196.4p a litre right now, 192.4p on average across 4 stations.The cheapest is Essar, 0.6 km from the centre. Prices last updated 08:43 (Europe/London).
A 55-litre fill-up at the cheapest station in Porthmadog instead of the dearest one, and instead of the city average.
Supermarket forecourts in Porthmadog: Tesco.
Calculated from the same live prices as the station table below — 4 stations in Porthmadog, at the update time shown above.
| Station | |||||
|---|---|---|---|---|---|
|
1
Essar
Essar · LL49 9NY
|
0.6 km | 1.894 | 1.695 | — | — |
|
2
Tesco - PORTHMADOG
Tesco · LL49 9NU
|
0.4 km | 1.894 | 1.675 | 1.785 | — |
|
3
Shell - PORTHMADOG
Shell · LL49 9LU
|
0.4 km | 1.944 | 1.715 | — | — |
|
4
Glanaber Garage - PORTHMADOG
Glanaber Garage · LL49 9TP
|
0.8 km | 1.964 | 1.715 | — | — |
Diesel is up 6.4p versus 7 days ago (4 stations with prices on both days).
Tracked continuously: 4 of 4 stations · 2026-09-07 to 2026-09-14
| Brand | From | Average | Stations |
|---|---|---|---|
| Essar | 189.4p | 189.4p | 1 |
| Tesco | 189.4p | 189.4p | 1 |
| Shell | 194.4p | 194.4p | 1 |
| Glanaber Garage | 196.4p | 196.4p | 1 |
Porthmadog itself has 4 petrol stations with live prices tracked on fuel-prices.eu. Including the towns within roughly 10 km, the total rises to 7 stations. Data comes from the UK official fuel price data scheme.
The cheapest diesel in Porthmadog today is 189.4p a litre at Essar. Prices in nearby towns are often lower — use the +2 / +5 / +10 km filter above to compare.
The average diesel price in Porthmadog is 192.4p a litre, 0.5p above the national average of 191.9p.
The cheapest petrol in Porthmadog today is 167.5p a litre at Tesco - PORTHMADOG, 0.4 km from the city centre. It is 2.5p below the Porthmadog average of 170.0p across the 4 stations we track in the city.
Yes. Supermarket forecourts in Porthmadog (Tesco) average 189.4p a litre for diesel across 1 stations, against 193.4p at the other 3 stations — 4.0p cheaper.
Prices are updated daily from the UK official fuel price data scheme (retailer price feeds published under the government fuel-finder initiative).
Prices are collected from the UK official fuel price data scheme — the open price feeds published by major retailers under the government fuel-finder initiative — and refreshed daily. Prices are indicative and may differ at the pump. See also: live map of the UK · all live markets.
Contains public sector information licensed under the Open Government Licence v3.0. Source: Fuel Finder (CMA / GOV.UK).