This report describes the use of a finite element model for the prediction of circulation in the Gulf of La Spezia. This model is able to simulate the depth average circulation within small scale embayments characterized by irregular boundaries and bottom topography. The forcing terms, here considered are the tide, the wind and a seiche. The simulations describe the different roles of these forcing terms and the results have demonstrated that a seiche with a period of 70 minutes and an amplitude of 3 cm can be an important forcing term for the circulation in the Gulf of La Spezia and for the flushing time of the harbour waters. This seiche can explain the current velocity values measured in the Gulf and determines the flushing time and the water quality of the harbour.