If you come to India during the summer vacation, South India is recommended.
Of course the temperature is high and hot, but the sea is beautiful! You can enjoy the tropical resort.
It is the best paradise for resort enthusiasts who say, "Swim in the sea, do beauty treatments, and relax ..." rather than visiting tourist spots.The best outfit for your trip is cotton or 100% linen, which does not contain chemical fibers in hot weather.
See South India for more information.