Due to multiple factors, expect to potentially pay more when booking in February. For low rates, May can be a great choice for travel to Antalya. Flights to Antalya from Penang in May are about RM 3,094 on average during May, but can be found for as low as RM 2,841.
When travelling, it's generally smart to pack in preparation for rain or any other conditions that may arise. The rainfall in Penang is roughly less than Antalya. You can assume this to be the case over the next 13 days.
Expect the weather to be around 35 °C on average in July. As the temperature peaks, try to get your plans done early, as flight price and availability will have an impact on your travels. The climate in Antalya is generally hotter than in Penang.