Sardinia weather in September

September in Sardinia averages daytime highs of 27.1°C and nights around 18°C, with about 11 hours of sunshine a day. The sea averages 24.6°C: genuinely warm, fine for long, lazy swims. This is one of the wetter months, with about 6 rainy days and around 48 mm of rain, so pack a layer for showers, and the sun is strong (average peak UV 6), so sunscreen is essential.

Daytime high

27.1°C

Nights around 18°C

Sea temperature

24.6°C

Typical max waves 0.7 m

Rain

6 days

About 48 mm over the month

Sunshine

11 hrs/day

Average bright sunshine

UV index

Average daily peak

Wind

18 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.

What to do in Sardinia in September

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

Sunset viewpoints

Clear summer skies mean reliable sunsets: pick a west-facing headland and time your evening around it.

Photography Viewpoints Driving Routes & Scenic Roads

Sardinia in September: quick answers

How hot is Sardinia in September?

Daytime highs in Sardinia average 27.1°C in September, with nights around 18°C and roughly 11 hours of sunshine a day (ten-year average).

Is the sea warm enough to swim in September?

The sea around Sardinia averages 24.6°C in September: genuinely warm, fine for long, lazy swims.

Does it rain much in Sardinia in September?

Sardinia sees about 6 days with rain in September, totalling around 48 mm for the month.

September elsewhere on the island

Gallura Nurra & Alghero Sassari & Logudoro Barbagia & Nuorese Ogliastra Oristanese & Sinis Sulcis-Iglesiente Cagliari & Campidano

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