Rural Fire Service Shoalhaven public liaison officer Jonty Bruce said they're expecting a very high fire danger on Friday, November 29.

"We're expecting strengthening winds, low humidity and high temperatures. As we get closer we'll know better but that's what we're planning for," Mr Bruce said.

"We're not going to get it out, it's too big of a fire for us to put out before those conditions arrive.

"But we are trying to get into a position so we can maintain control of the fire throughout those hotter temperatures and higher winds."

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He said firefighters were trying to directly attack the fire although with difficulty, as the fire is burning in areas hard to reach.

The RFS' message is to avoid entering the area and for those who live nearby to remain vigilant.

"Our messaging for people particularly around the Booman and Currowan areas is to watch out for smoke and embers in the area, they're likely," he said.

"So for people in the area on days of high winds and low humidities, they really need to remain vigilant and keep their eyes on what's happening and finger on the pulse.

"We're starting to see now, with the influence of some high northwesterly winds, smoke in the Batemans Bay area but it's only smoke and that's all it's going to be."

Mr Bruce said lots of rain would be ideal but today's conditions have helped crews.

"Without the strong winds from any direction we are able to do a lot more with the fireground," he said.

Currently there are 15 trucks and 35 firefighters battling the Currowan fire which has burnt out over 2,500 hectares.

There has been no confirmation of the origin point or cause of the fires.