The state government's Fuel Check data shows that between the weeks ending April 7 and 14, average unleaded prices in Wagga rose from 141.5 cents per litre to 142.3 cpl.

This is in line with the 0.95 cpl increase in average unleaded prices across regional NSW in those two weeks.

The average unleaded price in Wagga today is 152.9 cpl.

The cheapest U91 today has been 138.9 cpl at Metro Fuel Ashmont while the dearest has been 159.9 cpl at BP Wagga.

In Ashmont today, Wagga resident Thomas Kyle was filling up his aunt's car for her weekend trip to Sydney.

"It's absolutely ridiculous that prices elsewhere in Wagga are high when it's cheap here," Mr Kyle said.

"We have to go to the worst part of town to get the cheapest prices."

Mr Kyle, who drives a six-cylinder car himself, advised residents to shop around for the best prices.

In Sydney, average petrol prices rose 136.8 cpl to 146.4 cpl between the weeks ending April 7 and 14.

Head of NRMA media Peter Khoury said that while prices around Sydney are at the higher point of the price cycle, there will be increases in regional NSW.

"Sydney is the most expensive in the state, but that will obviously change over the next week or two in line with oil prices globally," Mr Khoury said.

"For the rest of NSW, we won't see many fluctuations as prices steadily increase [during Easter holidays]."

Mr Khoury said regional prices may fall towards the end of next week and he encouraged residents to search for the best prices before going on road trips.

"Do your research before getting into your car," he said.

"Plot your journey along a map because chances are, you will drive through a town with cheap prices and save between 10 to 30 cents a litre," he said.

Across the nation, the Australian Institute of Petroleum's report for week ending April 14 had an average petrol retail price of 144.5 cpl while the wholesale price was 132.8 cpl.

In February this year, the Australian Competition and Consumer Commission released its December quarter 2018 petrol monitoring report that showed petrol prices in Australia's five largest cities (Sydney, Melbourne, Brisbane, Adelaide and Perth) fell sharply at the end of last year from a significant fall in crude oil prices.

However, prices did not fall by as much in many regional locations during the quarter.

Motorists can stay updated with prices at NSW Government's Fuel Check.

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