Latest figures from the AA show that unleaded petrol is up four pence per litre this month to 142.9, while diesel increased by 2.2p to 148.1.
This is the highest it has been since April 2011, when unleaded stood at 137.2p and diesel at 141.7p.
In the UK, the average cost of petrol has gone up to 142.48p a litre. Diesel, at 147.88p a litre on average, is just short of the record price which was set last week.
The fuel supply's been restored on the M4 at Cardiff West Services
No fuel available on the M4 at Cardiff West Services
First Minister Carwyn Jones has today told the UK Government to calm down and to stop spreading panic over potential fuel shortages.
The First Minister used a press conference to assure people that the UK does have enough fuel.
Protesters from across the country visit London today to call on the UK Government to cancel plans to increase fuel duty, and cut it instead
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According to figures from the AA, in Wales, Unleaded was 135.0p per litre and Diesel was 143.1p per litre.
A report commissioned by the lobby group FairFuel UK claims that even a modest cut in fuel duty of 2.5p per litre would create 180,000 new jobs.
Quentin Willson, national spokesman for FairFuelUK said:
'We have shared the findings of this report with MPs and Ministers. However, with only weeks to go to the Budget, we are concerned that the Government is not listening and not taking on board the significance of these findings.
"For months, the Government has been wheeling out the same old argument that it 'can't afford to cut duty'. Here is concrete evidence that it can make such a cut! Families and businesses are being crushed by these cruel levels of tax - 82p on every litre we buy.
According to figures from the AA, in Wales unleaded fuel costs135.0 pence per litre and the price of diesel stands at 143.1 pence per litre.
In the UK, the average price of a litre of unleaded petrol hit 137.44 pence, a new record high. While the cost of diesel is currently 144.67 pence.
Protesters from across the UK will take to the streets of London tomorrow to rally against a proposed rise in fuel costs.
They will be calling on the government to cancel plans to increase the duty levied on petrol this August.
