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Petrol Prices in Monmouth
Average today: unleaded 178.2p · diesel 199.9p ·
UK average 169.6p / 191.6p
Checked 14 September 2026 · retailer-reported prices, changes filed within 30 minutes
Monmouth trend: Unleaded ▲ 5.3p · 7d · Diesel ▲ 2.3p · 7d
The cheapest unleaded in Monmouth today is 177.9p
at Esso, A40 South Bound. Filling a 55-litre tank at the cheapest station instead of the priciest saves about £0.55.
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