According to the RFS Riverina Zone, the Gormans Road Fire is now contained.

Conditions over the fire ground have eased and firefighters now patrolling containment lines and mop up and black out any hot spots.

The Sturt Highway is now open but traffic control still in effect with reduced speeds.

UPDATE: Saturday at 4pm

NSW Rural Fire Service Operational Officer Bradley Stewart said crews are around the fire, but there is still a lot of blocking out to do.

"There is a significant amount of timber on fire and some car tyres inside the Yarragundry motorsport area.

"The fire itself has burnt through approximately 74 hectares. We have 14 trucks out there and 45 firefighters, and at one point we have two fixed-wing bombs, and we have an excavator out there now."

Officer Stewart said the Sturt Highway remains closed with diversions in place.

"They are now starting to get some light rain and a little bit bit of lightning to the west," he said.

"The cause is yet to be determined, it is under investigation as the fire started well away from the highway and well before we saw any lightning.

"We went to a watch and act very early on because it had some very real potential to cause significant harm in our community and was averaging three-metre flame heights and moving at a good speed."

Officer Stewart said the firefighters on the ground had done an excellent job on the ground.

"The wind drove it south, but had the winds blown into the northwest it could have potentially pushed into the San Isidore and Kapooka area," he said.

"It was an exceptionally good save by the firefighters on the ground."

EARLIER: Saturday at 1.30pm

A grass fire has broken out to the west of Wagga with firefighters battling the flames.

The blaze broke out about lunchtime on Saturday at Gormans Road, Yarragundry,

Ben Shepherd from the Rural Fire Service said it was burning on both sides of the Sturt Highway, the road is closed, but no properties are under threat.

"We are having some success with that," he said.

"It appears they have caught the head of the fire. It is remaining under a watch and act until they have that contained.

"We are also tracking some storms, it is likely we could see some storm activity over that fire ground in the next couple of hours."

Fire Rescue NSW and the Rural Fire Service are both on scene. The Sturt Highway is closed between Olympic Highway and Lockhart Road.