Petrol and diesel prices in the South West

Average prices in the South West

Most of the prices behind these averages are more than 3 days old.

From 657 forecourts with a usable price in our price data, updated 3:17am on 2 November UK time.

Cheapest forecourts in the South West now

Each forecourt's latest price from our price data. A price far from the UK median is left out, and older prices show their age.

Cheapest and dearest towns

The cheapest town for petrol in the South West is Teignmouth, at 167.5p. The dearest is Thornbury, at 185.1p.

Each town covers the forecourts within its page's radius, so towns close together share some. A town needs 5 petrol prices to be listed. Town figures from 2:03am on 2 November.

Counties in the South West

Across the 7 counties with a petrol average, it runs from 171.1p in Bristol to 173.3p in Dorset.

A dash means fewer than 5 prices to average. Each forecourt counts once, in the county of its nearest town.

Supermarkets against the major brands

Supermarket petrol averages 170.4p over 142 forecourts in the South West, 1.9p cheaper than the major brands' 172.3p over 430.

Supermarket diesel averages 196.6p over 120 forecourts in the South West, 3.0p cheaper than the major brands' 199.6p over 388.

Most of the prices behind these averages are more than 3 days old.

Compare every brand ·Supermarket fuel against the big brands

Motorway services

Motorway services petrol averages 194.6p over 15 forecourts, 22.7p dearer than the rest of the South West at 171.9p.

Motorway services diesel averages 218.6p over 15 forecourts, 19.6p dearer than the rest of the South West at 199.0p.

Fuel prices on every motorway

Diesel against petrol

Diesel costs 27.1p a litre more than petrol in the South West. That is about the same gap as the UK's 26.7p.

Why is diesel more expensive than petrol?

In the monthly report

In September 2026, the South West was the joint 5th dearest of the 12 UK regions for petrol, averaging 170.6p. For diesel it was the 5th dearest, at 193.6p.

Read the September 2026 report

Prices in every UK region

Questions about fuel prices in the South West

What is the average price of petrol in the South West?

Petrol (E10) averages 172.4p a litre in the South West, and diesel (B7) 199.5p, from 657 forecourts with a usable price.

Is fuel cheaper in the South West than the rest of the UK?

Petrol here is 0.7p dearer than the UK average of 171.7p, the joint 5th dearest of the 12 UK regions. Diesel is 1.1p dearer than the UK average of 198.4p, the 4th dearest of the 12 UK regions.

Where is the cheapest petrol in the South West?

The cheapest petrol we list in the South West is 161.9p a litre at Trago Mills Filling Station TQ12. The cheapest town on average is Teignmouth, at 167.5p.

Is supermarket fuel cheaper in the South West?

Supermarket petrol averages 170.4p over 142 forecourts in the South West, 1.9p cheaper than the major brands' 172.3p over 430.

How these figures work

A forecourt counts in the South West by the postcode area it is in.

Postcode areas: BA, BH, BS, DT, EX, GL, PL, SN, SP, TA, TQ, TR.

Each average uses every forecourt's latest price for the fuel while it is under 30 days old.

A price far from the UK median is counted but left out of the average, and a figure needs at least 5 prices.

Supermarkets and major brands are the groups on our brands page, each brand's own forecourts only. Motorway services are left out of both.

Each forecourt counts once in a county: the county of the nearest town we have a page for, within 20 miles. A county is listed under the region holding most of its forecourts.

Town figures are worked out each night over each town page's radius.

A town in a London borough is listed in London. Any other town is listed by its postcode and county.

Prices more than 3 days old still count, and we say so when most of a figure rests on them.

Every figure here comes from our price data, which explains where the prices come from.