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Petrol Prices in Carmarthen

Average today: unleaded 159.2p · diesel 180.0p · UK average 161.4p / 182.6p

Checked 23 August 2026 · retailer-reported prices, changes filed within 30 minutes
Carmarthen trend: Unleaded ▲ 1.3p · 7d · Diesel ▲ 0.7p · 7d
The cheapest unleaded in Carmarthen today is 155.9p at Murco, Gwalia Garage. Filling a 55-litre tank at the cheapest station instead of the priciest saves about £4.40.

Cheapest Unleaded First

CheapestSet 20 Aug · Checked today
Murco Gwalia Garage, SA32 7DR
UNLEADED
155.9p
DIESEL
178.9p
Save up to £4.40 on a tank
Set 17 Aug · Checked today
Murco Derwydd Garage, SA33 6TP
UNLEADED
156.9p
DIESEL
176.9p
Save up to £3.85 on a tank
Set 20 Aug · Checked today
Murco Tanerdy Garage, SA31 2EY
UNLEADED
157.9p
DIESEL
177.9p
Save up to £3.30 on a tank
Set 14 Aug · Checked today
Morrisons Parc Pensarn, SA31 2NF
UNLEADED
159.9p
DIESEL
179.9p
Costs £2.20 more to fill up
Set 21 Aug · Checked today
Valero Lysonnen Road, SA33 5DT
UNLEADED
159.9p
DIESEL
183.9p
Costs £2.20 more to fill up
Set 18 Aug · Checked today
Murco C K's Supermarket, SA31 3HL
UNLEADED
159.9p
DIESEL
179.9p
Costs £2.20 more to fill up
Set 21 Aug · Checked today
Esso A40, Carmarthen, SA32 7EN
UNLEADED
163.9p
DIESEL
182.9p
Costs £4.40 more to fill up
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