The offshore wave energy potentials of the Italian seas has been studied by analyzing the wave measurements carried out by the Italian Wave Buoys Network. The annual and monthly average offshore wave power, varies between 1.6 kW/m and 9.05 kW/m. The Adriatic sea shows an average value around 2 kW/m, the smallest value around Italian coasts as expected. The Ionian, North and Middle Tyrrhenian seas are a bit more energetic reaching a value of about 3 kW/m whereas the South Tyrrhenian is characterized by a value of 4 kW/m. A completely different behavior is highlighted for the Alghero buoy (north-west Sardinia island) where the estimated power reaches the value up to 9 kW/m.