Fuel prices
Petrol and diesel prices in Gwynedd
Average pump prices across 37 filling stations in Gwynedd, from the prices every UK forecourt must now publish under the government’s Fuel Finder scheme. Checked 31 Oct, 19:32.
- Average unleaded petrol 171.4p 0.1p below the UK average
- Average diesel 198.3p 0.4p below the UK average
- Cheapest petrol 163.9p Texaco H.g.thomas Motors Limited
- Filling stations 37 3 at supermarkets
Unleaded petrol averages 171.4p a litre across 20 forecourts in Gwynedd, 0.1p below the UK average. Diesel averages 198.3p, 0.4p below the UK average. The cheapest petrol is at Texaco H.g.thomas Motors Limited, 163.9p; the dearest is 176.9p. The cheapest diesel is at Texaco Bryn Llwyd Services, 193.9p.
Cheapest petrol and diesel in Gwynedd
| Filling station | Price |
|---|---|
| | 163.9p |
| | 166.9p |
| Shell MFG Porthmadog Porthmadog | 168.9p |
| | 168.9p |
| | 168.9p |
| | 169.9p |
| | 169.9p |
| | 169.9p |
| | 170.9p |
| | 171.9p |
| Filling station | Price |
|---|---|
| | 193.9p |
| Murco Clynnog Service Station Caernarfon | 195.9p |
| | 195.9p |
| Shell Gwalia Garage Caernarfon Limited Caernarfon | 196.9p |
| | 196.9p |
| | 196.9p |
| | 197.9p |
| | 198.9p |
| | 198.9p |
| Dragon Garej NI Pwllheli | 199.9p |
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Council areas in Wales, cheapest first
Gwynedd is number 10 of 21 for petrol.
| Area | Petrol | Diesel |
|---|---|---|
| Carmarthenshire | 168.3p | 196.4p |
| Bridgend | 168.4p | 198.2p |
| Pembrokeshire | 168.5p | 196.1p |
| Isle of Anglesey | 168.8p | 195.8p |
| Rhondda Cynon Taf | 168.9p | 198.1p |
| Caerphilly | 168.9p | 197.4p |
| Neath Port Talbot | 170.0p | 197.3p |
| Blaenau Gwent | 170.3p | 197.3p |
| Ceredigion | 170.9p | 198.9p |
| Gwynedd | 171.4p | 198.3p |
| Monmouthshire | 171.5p | 201.4p |
| Swansea | 171.6p | 198.6p |
| Cardiff | 171.6p | 199.2p |
| Merthyr Tydfil | 171.7p | 198.6p |
| Vale of Glamorgan | 172.1p | 198.4p |
| Wrexham | 172.1p | 198.5p |
| Newport | 172.9p | 199.5p |
| Powys | 174.0p | 200.6p |
| Flintshire | 174.5p | 200.0p |
| Conwy | 174.6p | 201.2p |
| Denbighshire | 178.7p | 200.1p |
Every filling station in Gwynedd
A dash means no current price: none reported, not changed for over two weeks, or not believable.
Average prices in Gwynedd, day by day
Average petrol and diesel prices, 15 Sept 2026 to 31 Oct 2026
| Day | Diesel | Petrol |
|---|---|---|
| 15 Sept 2026 | 194.1p | 170.9p |
| 16 Sept 2026 | 195.3p | 171.4p |
| 17 Sept 2026 | 196.0p | 171.9p |
| 18 Sept 2026 | 196.7p | 172.5p |
| 19 Sept 2026 | 197.1p | 172.8p |
| 20 Sept 2026 | 197.2p | 172.8p |
| 21 Sept 2026 | 197.7p | 173.0p |
| 22 Sept 2026 | 199.5p | 173.6p |
| 23 Sept 2026 | 200.0p | 174.0p |
| 24 Sept 2026 | 201.1p | 174.4p |
| 25 Sept 2026 | 201.1p | 174.6p |
| 26 Sept 2026 | 201.2p | 174.7p |
| 27 Sept 2026 | 201.4p | 174.7p |
| 28 Sept 2026 | 201.5p | 175.1p |
| 29 Sept 2026 | 201.7p | 175.2p |
| 30 Sept 2026 | 201.7p | 175.1p |
| 1 Oct 2026 | 201.7p | 175.1p |
| 2 Oct 2026 | 201.7p | 175.1p |
| 3 Oct 2026 | 201.8p | 175.2p |
| 4 Oct 2026 | 201.8p | 175.2p |
| 5 Oct 2026 | 201.7p | 174.9p |
| 6 Oct 2026 | 200.7p | 174.8p |
| 7 Oct 2026 | 200.5p | 174.8p |
| 8 Oct 2026 | 199.9p | 174.5p |
| 9 Oct 2026 | 200.0p | 174.3p |
| 10 Oct 2026 | 200.0p | 174.3p |
| 11 Oct 2026 | 200.0p | 174.3p |
| 12 Oct 2026 | 199.3p | 173.2p |
| 13 Oct 2026 | 199.2p | 173.2p |
| 14 Oct 2026 | 199.3p | 173.0p |
| 15 Oct 2026 | 199.0p | 173.4p |
| 16 Oct 2026 | 198.9p | 173.4p |
| 17 Oct 2026 | 198.9p | 173.4p |
| 18 Oct 2026 | 198.9p | 173.4p |
| 19 Oct 2026 | 198.8p | 173.6p |
| 20 Oct 2026 | 198.5p | 173.5p |
| 21 Oct 2026 | 198.3p | 173.7p |
| 22 Oct 2026 | 198.2p | 173.4p |
| 23 Oct 2026 | 198.4p | 173.3p |
| 24 Oct 2026 | 198.4p | 173.2p |
| 25 Oct 2026 | 198.3p | 173.3p |
| 26 Oct 2026 | 198.3p | 173.1p |
| 27 Oct 2026 | 198.3p | 173.3p |
| 28 Oct 2026 | 198.2p | 172.1p |
| 29 Oct 2026 | 199.2p | 171.4p |
| 30 Oct 2026 | 198.2p | 171.4p |
| 31 Oct 2026 | 198.3p | 171.4p |
Source:Fuel Finder,ONS Prices at 19:32 on 31 October 2026 Updated
Data stories to read next
Data sources and methodology
| Figures | Source | Period | Records | Updated |
|---|---|---|---|---|
| Forecourt prices | Fuel Finder open data Fuel Finder statutory scheme ONS Postcode Directory Office for National Statistics | Prices at 19:32 on 31 October 2026 | 8,148 filling stations | 31 October 2026 |
- Averages use unleaded (E10) and standard diesel (B7) prices at open forecourts, leaving out prices unchanged for over two weeks or far from every other forecourt. They count each forecourt once, not by how much fuel it sells.
- Forecourts are placed in council areas from their postcode, using the ONS Postcode Directory.
Source: Fuel Finder, the UK government’s statutory fuel price scheme.
Source: Office for National Statistics licensed under the Open Government Licence v3.0. Contains OS data © Crown copyright and database right 2026. Contains Royal Mail data © Royal Mail copyright and database right 2026.