Olbia is the practical gateway to northeast Sardinia, with an airport, ferry port and rail station near a small old centre. Corso Umberto is the city base, Pittulongu is the beach and Porto Rotondo is the marina.
Corso Umberto I runs through the old centre toward the waterfront. Around it are Piazza Regina Margherita, the church of San Paolo and streets of restaurants. San Simplicio stands near the station, and the Archaeological Museum is by the old port on Peddone island. A central room is right for a ferry arrival or a trip that mixes town and coast.
Olbia is not one continuous beach resort. Pittulongu and Bados lie northeast of town, with sand and views across the gulf. Porto Istana is south of the airport, facing Tavolara, and Murta Maria is the nearby village for groceries and local rooms. If you plan to dine in central Olbia, work out the route first.
Porto Rotondo and Marinella are northwest of the city, on the way toward Costa Smeralda. The marina and coves make a coastal stay, but the rail station and old centre are a separate trip. San Pantaleo sits inland among granite hills. Stay there for village evenings and drive out to the beaches.
July and August bring average highs around 88 °F and very little rain. May, June and September allow longer walks and beach days without the midsummer heat. An airport bus reaches the centre, and the city bus map also covers Pittulongu, Porto Istana and Porto Rotondo. For a beach stay, look up the current timetable.