Weather in Cagliari in August

Prime time. If you get to pick your dates, August is the one. Highs average 28.2 °C, lows 24.2 °C, and rain falls on 3 days — nothing in the month is working against you.

August ranks 4 of 12 in Cagliari: past the worst of the year but short of June, which is the month to book if the dates are open.

Rain falls on only 3 days, so an itinerary with no wet-weather fallback is a reasonable risk. Pack for 28.2 °C days and 24.2 °C nights; the spread matters more here than any single number.

What the averages hide

Averages flatten a month, and this one hides a few things: 5 days top 30 °C — hot spells arrive, but they break; the day barely swings — 3.9 °C between the overnight low and the afternoon high. Across the twenty years measured, the hottest August day reached 33.3 °C and the coldest night fell to 19.9 °C.

This is the volatile part. August rainfall has ranged from 0 mm to 68 mm across the twenty years measured — a 68 mm spread around an average of 12 mm. The average is real but almost no individual August looks like it, so treat the figure as the middle of a wide range rather than a forecast.

Wind is light at 12.6 km/h, so the temperature on the page is close to the temperature on your skin, and humidity is unremarkable at 69%.

How August sits in the year

Temperatures hold steady either side: 27.6 °C in July, 28.2 here, 25.5 in September. Nothing about the timing within the month matters much.

Daylight in August

13.8 hours of daylight, losing 1.1 hours across the month. That is between Cagliari's extremes of 14.9 and 9.4 hours, so days are long enough not to constrain the plan.

Sea temperature

The sea sits at about 25.7 °C in August — warm enough to stay in as long as you like. This is the warmest the water gets all year.

How busy it gets

Peak season. Expect the highest prices of the year and to be booking well ahead.

Crowd levels are estimated from climate desirability and school-holiday calendars, not from visitor numbers.

August in Cagliari versus nearby

If Cagliari is one option among several, the nearby comparison is worth making. Palermo is the weaker option in August — 4.4 °C warmer, the same number of rain days. Rome is the weaker option in August — 5.3 °C warmer, 1 day more rain.

So: August works, with June the better month by 7 points if the dates can move. If they cannot, nothing here should stop you booking.

Every month in Cagliari

See all twelve months in Cagliari, or where else to go in August.