The cost of filling up is now at the highest price since February.

A falling dollar and rising higher product prices have pushed the price of petrol in many parts of the country to the highest price since February.

Z Energy, which also owns the Caltex brand, raised the price of both petrol and diesel by 3 cents a litre on Monday, while on Tuesday BP also raised prices by 3c a litre.

In many parts of the country without regional discounting, the cost of regular petrol is now $2.069 a litre. Broadly, the price covers Wellington and most of the South Island.

The New Zealand dollar has been falling steadily since the September 23 election, from US73.3c on the Friday before the election, to just below US68.5c on Tuesday evening.

READ MORE: Petrol back above $2 a litre as pricing inquiry fades into the past

A spokeswoman for Z Energy said at the same time as the dollar has fallen, the price of crude oil and refined petrol and diesel has been rising.

"This has resulted in margins being squeezed over a period of time," the spokeswoman said.

Finance Minister Grant Robertson said on Tuesday said the response of financial markets was typical of changes in government around the world.

"Any volatility we've see is a reaction to a change of government that would happen at any time anywhere in the world and I'm sure that the markets will see that they can be confident in our Government."

On Thursday, BNZ strategist Jason Wong said the New Zealand dollar had been hit by uncertainty around the policies of the new Government.

"Our working assumption is that the market has over-reacted, as currencies are apt to do, but until the policy detail is released, then some sort of political risk premium will be built in the New Zealand dollar," Wong said.