Canterbury wildfire contained but still burning

It could take days to extinguish a wildfire burning in a Canterbury pine forest, Fire and Emergency says.

Fire crews have been fighting the blaze north of Waipara in the Hurunui district since being alerted to it on Thursday night.

The fire is roughly 105 hectares in size and incident commander Des Irving said it had been contained - but it was not under control.

He said strong winds were expected to reduce over the weekend but there was no sign of rain.

"We have significant challenges with the weather. The wind is gusting and it will gust up to about 70 kilometres an hour today," Irving said.

"That's creating some issues for us."

Five helicopters and three ground crews were working to bring the fire under control on Friday.

They were reviewing the conditions to ensure it was safe for air support to continue, he said.

The fire was in a forestry block surrounded by farmland and there was no immediate threat to any structures or properties, Irving said.

People are urged to stay away from the area.

Fire and smoke may be visible from State Highways 1 and 7.

Irving described it as a "long duration event", but he hoped it would be under control by Saturday afternoon.

"Once air operations are finished, there are trees still standing so we have to get in with our ground crews and extinguish the hotspots."

That included using specialist equipment to check that were not any hotspots buried in the roots.

He encouraged people to check the forecast and the Fire and Emergency CheckItsAlright website https://www.checkitsalright.nz/ before lighting a fire.

"Please take extra care to monitor your burn piles and take action as needed," Irving said.

"We often find old, extinguished burn piles reigniting during dry and windy weather conditions."

It was currently "too dangerous" for a fire investigator to examine the area and work out the cause and origin of the fire, he said.