Petrol prices in SA18
Every forecourt in the SA18, Swansea postcode district, cheapest first, with live prices from the government Fuel Finder feed — covering Carmarthenshire, Wales.
Petrol stations in SA18 (6)
Cheapest first. Prices update through the day.
Brynamman One Stop, BrynammanCheapestBrynamman£1.58E10—B7TEXACO, AMMANFORDAMMANFORD£1.60E10£1.80B7ESSAR, AMMANFORDAMMANFORD£1.60E10£1.80B7TEXACOSA18 2ET£1.60E10£1.80B7TESCO, RHYDAMANRHYDAMAN£1.60E10£1.80B7Texaco, AmmanfordAmmanford£1.60E10£1.80B72.0p separates the cheapest and dearest forecourt inside SA18 alone — £1.10 on a tank, without leaving the district. That is usually a bigger saving than any amount of waiting for prices to move.
Is anywhere nearby cheaper?
Neighbouring districts, with the fuel the drive itself burns already subtracted — a 45 mpg car, there and back.
Not today. Of the 8 nearest districts, none is cheap enough to cover the fuel the drive itself would burn — the £1.58already available inside SA18 wins. That is the common case, and it is why chasing a cheaper sign a few miles away usually costs more than it saves — the break-even calculation shows where the line falls.
Nearby postcode districts
Closest first, with today’s typical price.
About fuel prices in SA18
SA18 is part of the SA postcode area, which covers Swansea, and its forecourts sit mainly in Carmarthenshire in Wales. We track 6 forecourts here across 4 brands, of which 4 are supermarkets.
Supermarket forecourts usually anchor local pricing: where one exists, the independents nearby tend to price close to it, and where none does, prices drift upward. SA18 has 4, which is why the local spread is 2.0p. Across Wales as a whole the median is £1.65 — see the whole region.
Every price here comes from the government Fuel Finder scheme, which since February 2026 has required each forecourt to report a change within thirty minutes. For the forecourts nearest a specific address rather than a whole district, search your full postcode.
Common questions about SA18
How much is petrol in SA18 today?
The typical SA18 forecourt is charging £1.60 a litre for E10 petrol — £87.94 for a 55-litre tank. The cheapest of the 6 forecourts reporting a price in SA18 is at £1.58, and the dearest £1.60.
Where is the cheapest petrol in SA18?
Brynamman One Stop, Brynamman in Brynamman at £1.58 a litre. That is 2.0p below the dearest forecourt in SA18. Prices change through the day, so check before you set off.
Is SA18 cheaper or dearer than the rest of the UK?
SA18 runs 5.0p below the UK median of £1.65, and sits in Wales, where the regional median is £1.65. Local competition drives most of that: districts with two or more supermarket forecourts close together price lower than districts where the nearest alternative is a drive away.
Is it worth driving to a cheaper postcode from SA18?
Not on today's prices. No neighbouring district is cheap enough to cover the fuel the detour itself would burn, so the best price available to you is inside SA18.
How many petrol stations are there in SA18?
6 forecourts, from 4 different brands, including 4 supermarket forecourts. Every one reports its prices to the government Fuel Finder scheme within thirty minutes of a change.