NSW is on track to have warmer than average days and nights in the coming months, the Bureau of Meteorology says.

The prediction comes off the back of two record-breaking summer months, with February also looking to record mean above-average temperatures.

The Bureau of Meteorology says there is high chance it will be warmer than average in autumn.

Climatologist Felicity Gamble said there was an 80 per cent chance that most of the country would experience hotter temperatures through autumn.

The average daytime temperatures for Sydney are 24.8 degrees in March, 22.5 degrees in April and 19.5 in May. Overnight average temperatures are 17.6 degrees, 14.7 degrees and 11.6 degrees for those months respectively.