Cagliari & Campidano weather in September

September in Cagliari & Campidano averages daytime highs of 28.6°C and nights around 19.8°C, with about 11 hours of sunshine a day. The sea averages 25.6°C: genuinely warm, fine for long, lazy swims. Expect around 6 rainy days bringing roughly 35 mm in total, usually in short bursts, and the sun is strong (average peak UV 6), so sunscreen is essential.

Daytime high

28.6°C

Nights around 19.8°C

Sea temperature

25.6°C

Typical max waves 0.4 m

Rain

6 days

About 35 mm over the month

Sunshine

11 hrs/day

Average bright sunshine

UV index

Average daily peak

Wind

21 km/h

Average daily maximum

Weather data by Open-Meteo.com (CC BY 4.0). Figures are ten-year averages from the historical record.

What September feels like

September is the locals' favourite, and ours. The crowds thin within a fortnight, the sea stays warm well into October, and the light turns soft and amber. Vendemmia, the grape harvest, animates the wine country, restaurants have time to talk again, and you can hike in the morning and swim in the afternoon. If you can travel in September, travel in September. Around Cagliari and the Campidano the capital anchors everything, with Poetto's long beach and the south coast an easy reach away.

What to do in Cagliari & Campidano in September

Poetto to Chia

The capital's own eight-kilometre beach plus Villasimius and Chia within an hour: the south coast is a summer city break with sand.

Beaches Boating Cagliari & Campidano

Beach days

Warm sea, long days and dependable sunshine: this is prime beach weather. Go early or late in the day for the softest light and the emptiest sand.

Beaches Hidden Beaches & Secret Coves

Get out on the water

Flat, warm mornings are made for boat trips, kayaking and snorkelling; the breeze that builds in the afternoon suits sailors and windsurfers.

Boating Watersports

Island hopping

Calm summer seas make the small islands off the coast an easy day out, from ferry rides to skippered charters.

Islands Day Trips

Evenings in town

When the beaches empty, the piazzas fill. Aim for a slow dinner outdoors and a passeggiata through the old lanes.

Restaurants Towns & Villages

Cagliari & Campidano in September: quick answers

How hot is Cagliari & Campidano in September?

Daytime highs in Cagliari & Campidano average 28.6°C in September, with nights around 19.8°C and roughly 11 hours of sunshine a day (ten-year average).

Is the sea warm enough to swim in September?

The sea around Cagliari & Campidano averages 25.6°C in September: genuinely warm, fine for long, lazy swims.

Does it rain much in Cagliari & Campidano in September?

Cagliari & Campidano sees about 6 days with rain in September, totalling around 35 mm for the month.

September elsewhere on the island

All of Sardinia Gallura Nurra & Alghero Sassari & Logudoro Barbagia & Nuorese Ogliastra Oristanese & Sinis Sulcis-Iglesiente

Planning a trip? Browse our Cagliari & Campidano guides or see today's live weather.