Shoalhaven RFS District Officer James Morris said it would take at least two weeks of hot, dry and windy weather to dry out the fuel load and increase the fire risk in the region.

With rain predicted again next week, the soggy start to summer may be the blessing firefighters were looking for.

"In Nowra, we have had more than 200mm of rain over the past week and a half and that's significantly reduced the fire threat in the Shoalhaven," Mr Morris said.

"Volunteers will hopefully be able to spend time out with their families at Christmas time for a change."

The Shoalhaven RFS comprises more than 1700 volunteers in 36 brigades across a district that stretches from Berry in the north to Durras in the south.

With such an extensive patch to cover, Mr Morris says it's not unusual to have crews battling fires in the north and floods in the south.

"A few times I've had to call a crew from a fire to go and help with floods," he said.

"It can be mind-boggling."

Mr Morris said the recent rainfall was a return to the typical storm patterns of 10 to 15 years ago.

"We used to get these 30 to 35 degree days and then a large thunderstorm would roll in from the west," he said.

The widespread rain has also snuffed out the threat of lightning strikes at present.

"We've had lots of lightning occur in the past week or two and usually we would be looking at sending up spotter aircraft but with all the rain anything that may have started is quickly put out," Mr Morris said.

Far South Coast Rural Fire Service team leader John Cullen said the biggest danger now would be complacency.

"We really encourage people to continue with their preparations and planning," he said. "It only takes a few weeks of hot, dry weather to get back to where we were. We will be monitoring January a week at a time.

"But the rain has been magnificient, we will now have a reduced fire threat through to Christmas and then we will have to follow the weather and see how things go.

"It's done a bit damage to fire trails, we are still assessing the extent, particularly in some of the parks, but it's filled everyone's tanks and all the dams are full. It will produce prolific grass growth though, which is different to other years, we will have to monitor that."

"But it's great, considering this time last year we were dealing with major fires in the Eurobodalla in October and assisting in other areas now."