During the month of April, May and October you are most likely to experience good weather with pleasant average temperatures that fall between 20°C (68°F) and 25 °C (77°F).

On average, the warmest months are June, July and August. Vatera has dry periods in May, June, July, August and September. The warmest month is July with an average maximum temperature of 32°C (89°F). The coldest month is February with an average maximum temperature of 13°C (55°F). August is the driest month.

Around two million years ago, Lesvos was not an island but was joined to the Asian mainland, and the gulf of Vatera was a subtropical shallow sea. The environment of Vatera at that time was partly forested, partly open woodlands, with meandering rivers through the area flowing to the sea. The animals in question died somewhere near the rivers and their carcasses were transported by the water downstream. They got stuck somewhere at a bend, and sediments covered the remains until they were removed by Dermitzakis' team, a paleontologist. In the nearby village of Vrissa, the University of Athens has established a natural history collection dedicated to the palaeontological finds. The fossils include bones of stenoid horses, mastodons, a baboon-like monkey and a giant tortoise, the latter the size of a small car.