Temperatures could hit 30 degrees on Saturday and 31 on Sunday, with highs of 34 possible on Monday.
Kew Gardens recorded a peak temperature of 32.2°C last Thursday, before being surpassed by 33.2°C in Charlwood on Saturday.
Forecasters say there’s a 20% chance we’ll see the hottest June day ever with the current record of 35.6 degrees set in 1976.