Diesel prices in Porthmadog

Compare current diesel (B7) across 4 Porthmadog forecourts. Check the lowest listed price, local average and map before choosing where to fill up.

Lowest listed diesel forecourt in Porthmadog

199.9p/l

Lowest listed diesel price in Porthmadog

Porthmadog Superstore - Petrol Filling Station0.3 mi from Porthmadog centre

Directions Station details

Diesel local average: 201.7p/l
Local forecourts: 4
UK comparison: Above

Prices checked 20 Oct 2026, 08:10

Live local prices

Current diesel prices in Porthmadog

4 current diesel (B7) prices from 4 Porthmadog forecourts listed as stocking diesel.

Prices checked 20 Oct 2026, 08:10. Individual rows show when that forecourt price was reported.

Current diesel prices in Porthmadog. Ranked by Diesel (B7) price.
Forecourt	Postcode and report	Diesel(B7), selected ranking	Distancefrom Porthmadog centre	Opening times	Actions
1Porthmadog Superstore - Petrol Filling StationTesco	LL49 9NUReported 24 Sept 2026, 16:08	199.9pCheapest	Distance: 0.3 mi	Open 24 hoursMonday - Sunday: 24 hours; Bank holidays: 24 hours	Details
2EMadog Garage / Hamdden Caravans LtdEssar	LL49 9NYReported 22 Sept 2026, 07:45	199.9pCheapest	Distance: 0.4 mi	07:30 - 20:00 dailyMonday - Sunday: 07:30 - 20:00; Bank holidays: 07:30 - 20:00	Details
3Mfg PorthmadogShell	LL49 9LUReported 14 Oct 2026, 22:36	202.9p	Distance: 0.3 mi	06:00 - 23:00 dailyMonday - Sunday: 06:00 - 23:00; Bank holidays: 06:00 - 23:00	Details
4Glanaber GarageIndependent forecourt	LL49 9TPReported 28 Sept 2026, 08:29	203.9p	Distance: 0.5 mi	Hours vary by dayMonday: 08:30 - 17:00; Tuesday: 08:30 - 17:00; Wednesday: 08:30 - 17:00; Thursday: 08:30 - 17:00; Friday: 08:30 - 17:00; Saturday: 09:00 - 13:00; Sunday: 00:00 - 00:00; Bank holidays: 10:00 - 14:00	Details

How to read this page

About diesel prices in Porthmadog

Coverage, freshness and comparison scope matter as much as the headline price.

Porthmadog has 4 forecourts listed as stocking diesel (B7), with current prices available from 4. The table ranks forecourts by current diesel (B7) price, with distance and station name used to order equal or unavailable prices. Station status, distance and update freshness remain visible for comparison.

This page focuses on Diesel (B7) using official UK Fuel Finder data, local averages, regional benchmarks and UK average comparisons where coverage is available.

Thirty-day evidence

Thirty-day diesel (B7) price trend

Thirty-day diesel (B7) trends, local comparisons and potential savings from official UK Fuel Finder data.

204p200p195p

Average price

201.7p/l

20 Sept to 19 Oct

30-day low: 194.9p/l
30-day high: 204.9p/l
Movement (30 days): +4.3p/l
Volatility: Low

Jerry's diesel trend read

Diesel in Porthmadog rose 4.3p/l, from 197.4p/l on 20 September to 201.7p/l on 19 October. Over the latest 7 days, the average fell 0.5p/l, which cuts against the wider rise. Porthmadog's current average is 2.6p/l above the UK average. Daily movement volatility is low.

Consistency, not just today's lowest

A consistently competitive diesel forecourt

This recommendation requires at least 21 completed reporting days and a current price no higher than the local average.

Porthmadog Superstore - Petrol Filling Station

199.9p/l today

1.8p/l below Porthmadog average today

Near cheapest: Within 1p on 30 of 30 days
Daily cheapest: Cheapest on 30 of 30 days
Average gap: 0p/l average gap
Evidence: 30 of 30 days reported

Directions Station details

Porthmadog Superstore - Petrol Filling Station stayed within 1p/l of the daily cheapest diesel price on 30 of 30 reported days, averaging 0p/l above the daily cheapest price.

Price choice

Potential diesel savings

Cheapest versus average is the practical comparison. Cheapest versus highest is the maximum listed difference, not a guaranteed saving.

Current local price range

4p/l

199.9p/l cheapest, 203.9p/l highest

Cheapest versus local average: £0.99 less than the local average on a 55-litre fill
Cheapest versus highest: £2.20 maximum listed difference on a 55-litre fill

Comparing current diesel prices in Porthmadog can avoid paying up to 4p/l more than the cheapest listed price.

Diesel (B7) compared with nearby locations

Ranked by current average diesel price. Porthmadog is highlighted so the local baseline remains easy to find.

Caernarfon has the lowest nearby average shown at 197.7p; it is 4p/l cheaper than Porthmadog.

Local market evidence

Diesel market in this location

Distribution, station consistency and forecourt type provide different evidence. None is treated as a guarantee of the next pump price.

Price distribution

199.9p to 200.9p2 stations

200.9p to 201.9p0 stations

201.9p to 202.9p0 stations

202.9p to 203.9p2 stations

The largest group of reporting diesel forecourts in Porthmadog sits in the 199.9p to 200.9p range.

Cheapest station consistency

Supermarkets and other forecourts

Supermarkets: 199.9p/l
Major brands: 201.4p/l
Independent forecourts: 203.9p/l

Named local evidence: Tesco, Shell, Independent forecourts.

Where value persists

Diesel brand reliability over 30 days

Historical claims render only when the documented reporting thresholds are met.

No brand has at least two Porthmadog forecourts and 21 days of diesel evidence for a reliable 30-day comparison.

Areas with the cheapest diesel in Porthmadog

1Garth3 reporting, 2 below average199.9p/l
2Borth-y-Gest1 reporting, 0 below average203.9p/l

Good to know

Fuel price FAQs for Porthmadog

Use the current local evidence to choose a forecourt, compare nearby places and understand how coverage and freshness affect the figures.

Where is the cheapest diesel (B7) in Porthmadog today?

The cheapest listed diesel (B7) price in Porthmadog is 199.9p/l at Porthmadog Superstore - Petrol Filling Station. Check the table before travelling because distance, opening status and recent updates can affect the best choice.

How are Porthmadog diesel (B7) forecourts ranked?

Forecourts are ranked by their current diesel (B7) price first. If prices are tied or unavailable, the table uses distance and station name. Use the forecourt comparison to sort and inspect the current results.

Are diesel (B7) prices in Porthmadog below the UK average?

Diesel is above the UK average by 2.6p/l. These comparisons use current location averages and the latest benchmark data available to the page.

How recent are the Porthmadog fuel prices on this page?

Prices checked 20 Oct 2026, 08:10. Individual prices can remain unchanged between checks until a retailer reports a price change.

Why do some Porthmadog forecourts not show a current diesel (B7) price?

A forecourt can be listed when it is known to stock diesel (B7), even if there is not a current reported price available for that fuel. The price table keeps those stations visible but prioritises forecourts with current prices.

Should I compare nearby locations before filling up in Porthmadog?

Nearby comparisons currently show Blaenau Ffestiniog at 204p/l, 2.3p/l more expensive than Porthmadog, Pwllheli at 200.6p/l, 1.1p/l cheaper than Porthmadog and Caernarfon at 197.7p/l, 4p/l cheaper than Porthmadog. Compare Blaenau Ffestiniog, Pwllheli, Caernarfon and Dolgellau.

How can I compare fuel prices around my current location?

Use cheapest diesel near me for a distance-led comparison based on your current position.

Built on real fuel-price data

Prices are sourced from the UK Government Fuel Finder scheme. Prices checked 20 Oct 2026, 08:10. See how we qualify and compare prices

Retailer reporting target: 30 minutes