Live prices
Cheapest petrol and diesel prices in Caernarfon
6 forecourts tracked in Caernarfon (6 reporting unleaded (E10), 6 reporting diesel (B7), 3 reporting premium (E5)). Prices last refreshed at 3:02pm on 20 September 2026.
The cheapest reported unleaded petrol (E10) in Caernarfon is £7.63 a gallon (167.9p per litre) at Essar, London Garage Ltd, Cwm-y-glo, Caernarfon, LL55 4DE, Caernarfon. The average across 6 forecourts currently reporting this grade is £7.76 a gallon (170.6p per litre), so choosing the cheapest rather than an average-priced forecourt saves about £1.35 on a 50-litre fill. That local average is 1.9p per litre below the UK average of 172.5p.
The average is unchanged since yesterday. The average has risen 4.1p per litre since last week.
Prices last refreshed at 3:02pm on 20 September 2026, supplied through the official UK Government fuel price open data scheme and checked every 30 minutes.
At 167.9p per litre, the cheapest unleaded in Caernarfon is the highest we have recorded here in 4 weeks. The Caernarfon average has risen 3.9p a litre over the past week.
Unleaded Prices
Unleaded (E10)
- Highest
- £7.91/gal173.9p/L
- Average
- £7.76/gal170.6p/L
- Lowest
- £7.63/gal167.9p/L
Diesel Prices
Diesel (B7)
- Highest
- £8.91/gal195.9p/L
- Average
- £8.86/gal194.9p/L
- Lowest
- £8.86/gal194.9p/L
Premium Unleaded Prices
Premium Unleaded (E5)
- Highest
- £8.63/gal189.9p/L
- Average
- £8.46/gal186.2p/L
- Lowest
- £8.31/gal182.9p/L
Super Diesel Prices
Super Diesel (SDV)
Not enough current price data.
All forecourts in Caernarfon
6 forecourts in Caernarfon, with live prices and full addresses. Showing 1 to 6.
London Garage Ltd, Cwm-y-glo, Caernarfon, LL55 4DE, Caernarfon · LL55 4DE
DirectionsDiesel B7
Ffordd Y Gogledd (north Road), Caernarfon, Gwynedd · LL55 1BE
Usually cheapest 5pm to 10pm, priciest 11pm to midnight here
DirectionsDiesel B7
Premium E5
Caer Service Station, South Road, Caernarfon, LL55 2HP, Caernarfon · LL55 2HP
Usually cheapest midnight to 5am, priciest 10am to 3pm here
DirectionsDiesel B7
Gwalia Garage Ltd, Caeathro, Caernarfon, LL55 2SS, Caernarfon · LL55 2SS
Usually cheapest midnight to 5am, priciest 11am to 4pm here
DirectionsDiesel B7
Premium E5
Modurdy Dolydd Garage, Dolydd, Caernarfon, LL54 7EF, Caernarfon · LL54 7EF
Usually cheapest midnight to 5am, priciest 10am to 3pm here
DirectionsDiesel B7
Premium E5
Beran Garage, Deiniolen, Caernarfon, LL55 3NF, Caernarfon · LL55 3NF
Usually cheapest midnight to 5am, priciest 11am to 4pm here
DirectionsDiesel B7
Search near Caernarfon
Ask the fuel analyst
Answers come straight from recorded official price data, refreshed every 30 minutes.
Cheapest reported unleaded
Essar
London Garage Ltd, Cwm-y-glo, Caernarfon, LL55 4DE, Caernarfon
167.9p/L
Cheapest reported diesel
Essar
London Garage Ltd, Cwm-y-glo, Caernarfon, LL55 4DE, Caernarfon
188.9p/L
By fuel grade in Caernarfon
Nearby areas
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Prices are sourced from official UK government fuel-price data (Open Government Licence v3.0). Updated every 30 minutes.
Questions about fuel prices in Caernarfon
- What is the average petrol price in Caernarfon?
- The average unleaded (E10) petrol price in Caernarfon is currently 170.6p per litre (approx. £7.76/gal), based on live data from 6 forecourts reporting this grade. Prices are updated every 30 minutes from official UK government data.
- What is the average diesel price in Caernarfon?
- The average diesel (B7) price in Caernarfon is currently 194.9p per litre (approx. £8.86/gal). This is based on live data from forecourts in the area, updated every 30 minutes.
- Which is the cheapest petrol station in Caernarfon?
- Essar at London Garage Ltd, Cwm-y-glo, Caernarfon, LL55 4DE, Caernarfon currently has the cheapest reported unleaded petrol in Caernarfon at 167.9p per litre (approx. £7.63/gal). Prices change regularly, so check this page for the latest.
- Which is the most expensive petrol station in Caernarfon?
- According to official UK government fuel price data, Beran Filling Station (LL55 3NF) currently has the highest reported unleaded (E10) price in Caernarfon at 173.9p per litre (approx. £7.91/gal). Prices are refreshed every 30 minutes, so this can change through the day.
- How do I find the cheapest fuel near Caernarfon?
- Use the search box above to enter your postcode. fuel.co.uk will show you every forecourt ranked cheapest first, with live prices updated every 30 minutes from the GOV.UK Fuel Finder.