This is due to the potential development of La Nina, as well as warmer ocean temperatures in the eastern Indian Ocean.

"When we see warmer ocean surface temperatures, which creates more moisture and humidity, then we will see the possibility of increased rainfall," BOM meteorologist Stephen Stefanac said.

"At the moment, that's what the predictions are indicating."

Last year, the BOM predicted a drier than average spring for the east coast of Australia and the Macleay experienced, on average, its driest year and received only a third of its annual rainfall.

"As we head into spring this year, there is between a 70 per cent and 80 per cent chance of wetter than average conditions for the Macleay area," Mr Stefanac said.

"In previous years where we have seen the same conditions, there has been more than the average rainfall.

"The BOM is currently on La Nina watch and if it does form, it will increase the likelihood that we will experience more rainfall in the coming months."

Although this is the case, the beginning of spring is shaping up to be slightly drier for the Macleay before the wet weather arrives.

"September will see a drier start to spring and it's likely to be warmer than average until the wet weather conditions kick in around October and November," Mr Stefanac said.

Kempsey is likely to receive above its 251mm median rainfall for September to November, according to BOM.

Temperature wise, Mr Stefanac said the Macleay will experience neutral daytime temperatures for the majority of spring.

"At this time there is a 50 per cent chance of either warmer or cooler than average temperatures for the north coast of NSW," he said.