Lošinj is a renowned climate health resort because of its climate, which is favourable for healing respiratory diseases and allergies. Temperatures are moderate, air humidity and pressure are stable, fog appears three times a year, and there is a lot of sun. The annual suntime is 2580 hours (the same as Palermo). Temperatures above 30°C are rare, and high pine forests and a sea breeze make summer afternoons very pleasant.

The sea around Lošinj is the habitat of the last large group of bottlenose dolphins (tursiops truncatus) in the northern Adriatic, which indicates exceptional cleanliness of the sea. There are 1500 registered plant species in the Cres - Lošinj archipelago area - more than all the British islands combined! The special ones among them are the plant species atypical for these latitudes, such as lemon, date - palm, bananas, eucalyptus, cedar and sequoia.

Some parts of the natural heritage have been protected as park forests. Čikat, the most famous park forest, was planted in late 19th century by Ambroz Haračić, a professor of the glorious Lošinj Naval School, and seamen and captains brought many exotic plants from their voyages, which you can see in Lošinj gardens today.