Insolation is very high and in some years can reach 2880 hours. The average daily insolation in January in Korcula is 43% of the time from sunrise to sunset, and 91% in July.

The relatively long daily insolation is very valuable in summer, for it guarantees that tourists can spend their holidays pleasantly. The highest daily average of insolation on the Adriatic coast was recorded in Vela Luka (12.5).
this high insolation directly affects the yearly and daily air temperature. A rather high January isotherm of 9.2C brings the town of Korcula a mild winter, whereas the July isotherm of 24.5C means hot and sunny summers. The mean monthly air temperature indicates the exceptional thermal characteristics of the island of Korcula, mostly due to the surrounding sea and partly to the neighboring land.

The sea temperature enables swimming in Korcula from April to the middle of November.

Low winter temperature are very rare on the island of Korcula, and snow-covered soil is virtually unknown. Even if snow falls on some rare winter occasions, it melts immediately. The average yearly number of days with snow in Korcula is 1.5.

The yearly quantity of rain in Korcula is 1221mm, but is very rare in summer. There are only 41 days in the year when rain falls between 6 a.m. and 8 p.m. When it falls, it falls mostly at night.

Since Korcula is an island, winds have an important role there. They influence its economic activities, and its connections with the mainland in particular, and they enable recreational and tourist activities. The two dominant winds blow from the E and SE (JUGO) and the W and NW (MAESTRAL). The winds of the South-West quadrant have the dominant role and the strongest physiological influence on the people and crops. They are most frequent in autumn and winter but also in early spring. Moisture is at its highest in the period and temperatures are consequently much higher. the most frequent wind in the summer period is the North-West wind known as the Korcula Maestral. It is particularly frequent and strong in the Peljesac channel, whereas it is almost absent on the open sea. The Maestral in the Korcula - Peljesac channel is favorable for the popular summer sport of wind surfing, because it enables high speeds and sailing around the whole of the Korcula archipelago. For this reason Croatian and international sailing and wind surfing competitions often take place in Korcula and Orebic.

The continental winds form only a small proportion of the total winds which blow over the island of Korcula and are limited in time, JUGO is predominant in winter, and the MAESTRAL in summer.