Genoa is located in the Mediterranean climate zone. Average yearly temperatures are about 15° C in January and 23° C in August. It has a mild Mediterranean climate, with no sudden changes in temperature. The average yearly temperature range - between maximum and minimum temperature - is only 5.4 degrees Celsius, which is one of the lowest in Italy. As a rule, precipitation is more frequent in October and November and reaches 1,300 mm on average a year.
The sea reaches a depth of 1,000 metres at about 20 km from the coast. It is mainly calm, with a tide range of 30 cm, and a warm sea-surface temperature, which in September is about 23° C