The weather of Diu can be defined as Mild Tropical which remains considerably moderate and pleasant all twelve months of the year. Being an island, Diu experiences maritime temperate climate and the chilly coastal breezes significantly affect the temperature. The weather generally remains cool and dry and the mercury level ranges between 30ºc and 20ºc on and average.

Summerin Diu extends from March to June when the weather remains bearably hot and humid. The maximum temperature of summer months in Diu is recorded to be 36ºc while the minimum temperature goes as down as 20ºc. The climatic condition is not intolerable and you can very well visit Diu in summer.

Monsoon drenches this island with gentle rains from June to September. The average annual rainfall of Diu is 540 millimeters and the maximum ever recorded downpour is 63.5 cms. Due to the abundance of water and congenial climate, Diu is also blessed with affluent vegetation. The teeming palm and coconut groves multiply the charisma of the seashores. Other than that, the timber carpeting the Diu Island includes Casurina, Furiflora, Acacia, and Hoka etc.

Winter in Diu sets in during the month of November and extends till February. Winter is the most salubrious and ideal season of the year to visit Diu. The climate turns extremely delightful and romantic during this season and even the migratory birds arrive at Diu in winter which serves as an additional attraction. The temperature ranges between 20ºc and 26ºc during this period of time.
The best season of the year to visit Diu is from September to July.