Brisbane and much of the south-east are set for a heatwave this weekend while the Bureau warns of a warmer-than-average summer.

Bureau of Meteorology forecaster Chris Joseph says temperatures would be eight to nine degrees above average this weekend with today reacking a six degrees above the October average.

The RSPCA is reminding pet owners to take measures to reduce the risk of heat stroke such as putting out at least two to three bowls of water, place treats in ice-cubes, and not leaving animals in cars under any circumstances.