Restaurant and bar St Siandra brings year-round summer vibes to Mosman, so much so that the Mediterranean-inspired venue is situated on a white-sand private beach (yes, really), overlooking the turquoise waters of the Spit. Spend Christmas Day watching yachts glide by with Spritzes on tap, and eating delicious dishes like roast porchetta with smoked honey; whole barbecue snapper; and burnt apricot gingerbread trifle. How's that for la bella vita?