Mercury will reach a high of 43C on Saturday in Doha and at Mesaieed, Wakrah and Al Khor, Qatar Met Department said.
Strong wind is expected at places inshore by Saturday afternoon, while the offshore forecast is strong wind and high sea to the north.
Dukhan and Abu Samra are to experience a high of 38C, followed by 34C at Ruwais.
The minimum temperature for Saturday is forecast to be 26C (Mesaieed, Wakrah), followed by 27C (Al Khor), 29C (Abu Samra), 30C (Dukhan) and 31C (Doha, Ruwais).
Friday, a maximum temperature of 42C was recorded at Al Khor and a minimum of 27C at Mesaieed.