Weekly bulletin, 14 to 20 September 2026. Published Monday 21 September 2026.
Petrol prices in the Dorchester postcode area (DT): up 2.0p this week to 173.4p
Between Monday 14 September 2026 and Sunday 20 September 2026, the average price of unleaded across 24 filling stations in the Dorchester postcode area (DT) rose 2.0p to 173.4p a litre, while diesel rose 4.0p to 196.7p.
Cheapest and most expensive
On Sunday 20 September 2026, prices updated within 30 days, judged against their neighbours.
The last 30 days
Daily averages, in pence per litre. Right-click the image to save it; it is free to publish with a link.
Towns in the Dorchester postcode area (DT) where unleaded moved most
Towns with at least three filling stations, first to last day of the week.
Biggest falls
| Town | Stations | Now | Week |
|---|
Biggest rises
| Town | Stations | Now | Week |
|---|---|---|---|
| Dorchester | 5 | 173.9p | ▲ 2.4p |
| Weymouth | 5 | 172.5p | ▲ 2.4p |
| Bridport | 3 | 172.9p | ▲ 2.3p |
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24 of the 29 stations seen during the week changed at least one price.
The cheapest unleaded in the Dorchester postcode area (DT) on Sunday 20 September 2026 was 169.9p at Sainsburys Weymouth, Weymouth (DT3 5BJ); the most expensive was 183.9p at Damory Garage, Blandford Forum (DT11 7LP), a gap of 14.0p, or £7.00 on a 50-litre tank.
The cheapest diesel was 191.9p at Sainsburys Weymouth, Weymouth (DT3 5BJ).
Across the UK, unleaded was up 2.3p over the same week, at 172.3p, which puts the Dorchester postcode area (DT) 1.1p above the national average.
Among the towns of the Dorchester postcode area (DT), unleaded rose most in Dorchester (up 2.4p to 173.9p), Weymouth (up 2.4p to 172.5p), Bridport (up 2.3p to 172.9p).
"Drivers in the Dorchester postcode area (DT) paid 2.0p more for a litre of unleaded this week. On a 50-litre tank, that is £1.00 more than a week earlier. The gap between the cheapest and the dearest forecourt in the Dorchester postcode area (DT) is 14.0p, so where you fill up still matters more than when." said Jacky A., editor of fuelpricetoday.co.uk.
Show the plain text
Petrol prices in the Dorchester postcode area (DT): up 2.0p this week to 173.4p Between Monday 14 September 2026 and Sunday 20 September 2026, the average price of unleaded across 24 filling stations in the Dorchester postcode area (DT) rose 2.0p to 173.4p a litre, while diesel rose 4.0p to 196.7p. 24 of the 29 stations seen during the week changed at least one price. The cheapest unleaded in the Dorchester postcode area (DT) on Sunday 20 September 2026 was 169.9p at Sainsburys Weymouth, Weymouth (DT3 5BJ); the most expensive was 183.9p at Damory Garage, Blandford Forum (DT11 7LP), a gap of 14.0p, or £7.00 on a 50-litre tank. The cheapest diesel was 191.9p at Sainsburys Weymouth, Weymouth (DT3 5BJ). Across the UK, unleaded was up 2.3p over the same week, at 172.3p, which puts the Dorchester postcode area (DT) 1.1p above the national average. Among the towns of the Dorchester postcode area (DT), unleaded rose most in Dorchester (up 2.4p to 173.9p), Weymouth (up 2.4p to 172.5p), Bridport (up 2.3p to 172.9p). "Drivers in the Dorchester postcode area (DT) paid 2.0p more for a litre of unleaded this week. On a 50-litre tank, that is £1.00 more than a week earlier. The gap between the cheapest and the dearest forecourt in the Dorchester postcode area (DT) is 14.0p, so where you fill up still matters more than when." said Jacky A., editor of fuelpricetoday.co.uk. Source: fuelpricetoday.co.uk, weekly bulletin for the Dorchester postcode area (DT), 14 to 20 September 2026. https://fuelpricetoday.co.uk/press/2026-W38/area-dt Prices are pence per litre, computed from the government's Fuel Finder open data. Free to use with a link to the source.
Download the data
- Every station (CSV)
Name, brand, postcode, coordinates, unleaded and diesel on 14 Sep and 20 Sep.
- This bulletin (JSON)
All the figures on this page, with the 30-day series.
- The chart (PNG)
1200 by 630 pixels, white background.
Terms of use
Free to use, quote and publish, including the chart and the data, with a link to https://fuelpricetoday.co.uk/press/2026-W38/area-dt or a credit to fuelpricetoday.co.uk. Prices are computed from the Fuel Finder open data published by the Department for Energy Security and Net Zero under the Open Government Licence v3.0. Questions, a figure for another area, or a quote: contact@fuelpricetoday.co.uk.
How the figures are computed
Each average is the mean of the prices changed in the last 7 days at the filling stations of the Dorchester postcode area (DT), motorway services left out and prices more than 25p from the day's median discarded. The cheapest and most expensive stations are judged against the stations within 10 km, so that a typing error cannot top the list. The week runs from Monday to Sunday. Details on how this site works.