Summer Summer is the warmest of the four temperate seasons which also include winter, spring, and autumn. It occurs between spring and autumn. It is known for the longest days and shortest nights. The seasons start on different dates in different cultures based on astronomy and regional meteorology. However, when it is summer in the southern hemisphere it is winter in the northern hemisphere, and vice versa. Summer is traditionally associated with hot dry weather, but this does not occur in all regions. For example, the wet season occurs during summer across many parts of the tropics and subtropics. Tropical cyclones develop and roam the tropical and subtropical oceans during the summer. In the interior of continents, thunderstorms are most likely to produce hail during the afternoon and evening. Schools and universities have a summer break to take advantage of the warmer weather and longer days. People take advantage of the warmer temperatures by spending more time outdoors during the summer. Activities such as traveling to the beach and picnics occur during summer months. Sports such as cricket, volleyball, skateboarding, baseball, softball, soccer, tennis, water polo, and football are played. Water skiing is a uniquely summer sport, which is done when waters approach their warmest of the year.