Petrol and diesel prices in Porthmadog

Cheapest petrol near Porthmadog right now: 174.9p at Morfa Garage, reported 17:21 on 15 Oct. Petrol in Porthmadog averages 176.2p, 2.0p above the UK average. Cheapest diesel: 202.9p at Shell MFG Porthmadog. Diesel in Porthmadog averages 202.2p, 3.0p above the UK average.

  • Parciau Filling Station showed 172.9p for petrol when it last reported, on 12 Oct. That price may have changed.
  • Parciau Filling Station showed 196.9p for diesel when it last reported, on 12 Oct. That price may have changed.
  • No town within 15 miles has cheaper petrol than Porthmadog's best price today.
  • Supermarket forecourts in Porthmadog average 174.9p for petrol, 2.0p less than other forecourts.
  • 1 of 3 forecourts here reported a petrol price in the last 3 days. Older prices show the date they were reported.
  • Porthmadog is in the Gwynedd council area, 133rd cheapest of 354 for petrol in the council league table, averaging 174.2p.
Cheapest petrol near Porthmadog
Parciau Filling Station 172.9p 4¼ mi Parciau Filling Station, Criccieth, LL52 0RN · reported 12 Oct Tesco Porthmadog Superstore 174.9p ¼ mi Tesco Stores Ltd, Porthmadog, LL49 9NU · reported 24 Sept Madog Garage / Hamdden Caravans Ltd 174.9p ½ mi Penamser Garage, LL49 9NY · reported 22 Sept Morfa Garage 174.9p 4¼ mi Morfa Garage, Harlech, Ll46 2uw, Harlech, LL46 2UW Shell MFG Porthmadog 175.9p ¼ mi High Street, Porthmadog, LL49 9LU Glanaber Garage 177.9p ½ mi Glanaber Garage, Porthmadog, LL49 9TP · reported 28 Sept Esso Allan Green 177.9p 3 mi Allan Green, Park Road Garage, Penrhyndeudraeth, Ll48 6ls, Penrhyndeudraeth, LL48 6LS · reported 21 Sept

Distance in miles from Porthmadog town centre, as the crow flies. Showing stations within 5 miles.

Cheapest diesel near Porthmadog
Parciau Filling Station 196.9p 4¼ mi Parciau Filling Station, Criccieth, LL52 0RN · reported 12 Oct Tesco Porthmadog Superstore 199.9p ¼ mi Tesco Stores Ltd, Porthmadog, LL49 9NU · reported 24 Sept Madog Garage / Hamdden Caravans Ltd 199.9p ½ mi Penamser Garage, LL49 9NY · reported 22 Sept Morfa Garage 201.9p 4¼ mi Morfa Garage, Harlech, Ll46 2uw, Harlech, LL46 2UW · reported 7 Oct Shell MFG Porthmadog 202.9p ¼ mi High Street, Porthmadog, LL49 9LU Glanaber Garage 203.9p ½ mi Glanaber Garage, Porthmadog, LL49 9TP · reported 28 Sept Esso Allan Green 203.9p 3 mi Allan Green, Park Road Garage, Penrhyndeudraeth, Ll48 6ls, Penrhyndeudraeth, LL48 6LS · reported 21 Sept

Distance in miles from Porthmadog town centre, as the crow flies. Showing stations within 5 miles.

Average petrol in Porthmadog176.2p+2.0p vs UK average
Average diesel in Porthmadog202.2p+3.0p vs UK average
Cheapest vs dearest petrol£1.50on a 50-litre tank in Porthmadog

Price trend

We started recording daily average prices in Porthmadog on 16 October 2026. The trend chart appears here once there are a few days of data.

Not in central Porthmadog?

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All petrol stations in Porthmadog

3 petrol stations with a Porthmadog address, cheapest petrol first.

StationPetrolDieselReported
Tesco Porthmadog SuperstoreTesco Stores Ltd, Porthmadog, LL49 9NU · Open 24 hours 174.9p199.9p 24 Sept
Shell MFG PorthmadogHigh Street, Porthmadog, LL49 9LU 175.9p202.9p 14 Oct
Glanaber GarageGlanaber Garage, Porthmadog, LL49 9TP 177.9p203.9p 28 Sept

Supermarket fuel prices in Porthmadog

One supermarket forecourt in Porthmadog, cheapest petrol first.

StationPetrolDieselMiles
Tesco Porthmadog SuperstoreTesco Stores Ltd, Porthmadog, LL49 9NU 174.9p199.9p<1

24-hour petrol stations in Porthmadog

1 station sells fuel 24 hours a day in Porthmadog, cheapest petrol first. Shop hours can be shorter; check the station page.

StationPetrolDieselMiles
Tesco Porthmadog SuperstoreTesco Stores Ltd, Porthmadog, LL49 9NU 174.9p199.9p<1

Super unleaded and premium diesel in Porthmadog

Super unleaded (E5)

3 stations in and around Porthmadog sell super unleaded (e5), averaging 191.2p a litre. The cheapest is Tesco Porthmadog Superstore at 185.9p.

Premium diesel

2 stations in and around Porthmadog sell premium diesel, averaging 215.9p a litre. The cheapest is Parciau Filling Station at 211.9p.

Fuel price alerts for Porthmadog

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Fuel prices in nearby towns

Penrhyndeudraeth3 milesHarlech4 milesCriccieth4 milesBlaenau Ffestiniog9 milesPwllheli12 milesCaernarfon16 milesDolgellau17 milesBetws-Y-Coed18 miles

Fuel prices across Gwynedd · All towns in Wales

Questions about fuel prices in Porthmadog

Where is the cheapest petrol in Porthmadog?

Today the cheapest petrol near Porthmadog is 174.9p a litre at Morfa Garage, Morfa Garage, Harlech, Ll46 2uw, Harlech, LL46 2UW.

How much is diesel in Porthmadog today?

Diesel averages 202.2p a litre across 3 forecourts in Porthmadog, against a UK average of 199.2p.

Which supermarket has the cheapest petrol in Porthmadog?

Tesco Porthmadog Superstore is cheapest at 174.9p a litre.

How up to date are these prices?

Forecourts report their prices to the government's Fuel Finder scheme and we refresh them twice a day. These were last updated 17:30 today. Each forecourt's table row shows the day its price was reported.

Is there a 24-hour petrol station in Porthmadog?

Yes. Tesco Porthmadog Superstore sells fuel 24 hours a day.