Cagliari Geography & Climate

Cagliari sits at the head of the Gulf of Angels on Sardinia's southern coast, on a site that is half rock and half water.

The ridge

The old city occupies a spine of white limestone rising about a hundred metres straight out of the coastal plain. It is the only significant high ground for some distance, it has a natural harbour at its foot, and it commands the whole gulf — which is the entire reason there has been a city here since the Phoenicians.

The lagoons

Cagliari is ringed by shallow salt lagoons: Molentargius to the east, worked for salt into the twentieth century, and Santa Gilla to the west. Both are protected wetlands, and both hold large colonies of greater flamingos, which nest within the city limits and are visible from ordinary suburban roads — an unusual thing for a European capital city.

Salt

Molentargius was a working saltpan into the twentieth century, and its name comes from the Sardinian molente, the donkey — the animals that hauled the salt off the flats. The industry was viable precisely because this is one of the driest, windiest corners of Italy, and the abandoned works, the canals and the salt-workers' village survive inside the park.

Poetto and the Sella

East of the lagoons the Poetto beach runs for about eight kilometres of fine pale sand, closed at its western end by the Sella del Diavolo, a limestone headland with Punic and Roman remains on top.

Behind the city

Inland the ground rises into low hills of scrub and vineyard, and the Campidano plain runs north-west — the flattest and most fertile ground on an otherwise mountainous island.

Cagliari has a hot Mediterranean climate and is among the driest and sunniest places in Italy.

Summer

July and August are hot and effectively rainless, with highs commonly between 31 and 34°C and long spells without a cloud. The saving grace is the sea breeze along the coast and at Poetto; inland on the Campidano it is considerably worse.

Winter

Winters are mild and short. January highs sit around 15°C, frost is essentially unknown in the city, and it is perfectly comfortable to walk Castello in December. This is one of the warmest winters in Italy.

Wind

Cagliari is genuinely windy, which is the thing visitors least expect. The maestrale from the north-west blows hard and often, clearing the air and flattening the heat; it also makes Poetto a serious windsurfing beach and can make a warm day feel cold in February.

Rain

Around 430 millimetres a year, very low, falling almost entirely between October and March, often in short violent storms. Summer drought is the normal state and water restrictions are not unusual.

Sun

Cagliari records among the highest sunshine totals of any Italian city, which is not a tourist-board line but the reason salt was produced here industrially for centuries: evaporation is fast and reliable from spring to autumn. It also means the light is hard and flat in the middle of the day, and the city photographs best early and late.

The sea

Warm enough to swim from late May into October, and Poetto is in use by locals well outside those months.