How is the weather right now? Are evenings cool? Should I pack some light sweaters? Arriving Dec 25/17
Yes, cool evenings.
Sometimes when a norte hits (cold front from the north), temps can go as low as 17-18C
The time I visited in December it was cool at night but warm enough in mid-day to swim. Definitely need sweaters for evening but we ate and drank outdoors every night very comfortably in long pants and sweaters.