Mandvi: are you wondering about the weather you might find during your holiday? Befor organizing a holiday we always think about the wheather we might find when we get there. In Mandvi the average yearly temperature is 30°C. During the hottest month, which in this case is May, the temperature can get up to 33°C and the temperature of the sea reaches 29°C. Instead the coldest month is January, reaching a minimum temperature of 25°C. Here instead the water temperature drops to 21°C.