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Petrol Prices in Monmouth
Average today: unleaded 167.6p · diesel 192.6p ·
UK average 161.4p / 182.6p
Checked 23 August 2026 · retailer-reported prices, changes filed within 30 minutes
Monmouth trend: Unleaded ▲ 1.0p · 7d · Diesel ▲ 0.7p · 7d
The cheapest unleaded in Monmouth today is 166.9p
at Esso, A40 South Bound. Filling a 55-litre tank at the cheapest station instead of the priciest saves about £1.10.
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