In La Coruña we had great, sunny weather, enjoying the last days of summer. We also had some days of severe fog that is typical for this season. When the fog cleared it was very comfortable with temperatures between 15ºC and 24ºC.
Marina Coruña is a great place to start or end the Bay of Biscay crossing. The marina provides good shelter from all directions and the facilities are good. Supermarkets are a bit of a walk, but the city center is in walking distance and so is the Tower of Hercules and plenty small and cosy beaches.