When to sail South Sardinia: a week-by-week guide

The short answer: 19 June to 2 July. Southern Sardinia is shielded from the mistral by the bulk of the island — a hard day starts there at 20 knots, against 25.1 in the Strait of Bonifacio 200 miles north. But mid-May is as bad here as in the Balearics.

Private sailing in South Sardinia — the Villasimius coast — We build the week with you, once the window is chosen.

At a glance

Best week 19 June – 25 June — ×0.4 (2.2 % hard days, 4/26).
Week to avoid 15 May – 21 May — ×2.5 (13.2 %, 12/26).
Whole boat from €5,000 per week, skipper included.

Week	Wind risk	Hard days	Summers affected	Sea	Daylight
15 May – 21 May	×2.5	13.2 %	12/26	18.7 °C	14.4 h
22 May – 28 May	×0.7	3.8 %	5/26	19.6 °C	14.5 h
29 May – 4 June	×0.8	4.4 %	7/26	20.6 °C	14.7 h
5 June – 11 June	×1.2	6.0 %	7/26	21.9 °C	14.8 h
12 June – 18 June	×0.7	3.8 %	4/26	22.8 °C	14.9 h
19 June – 25 June	×0.4	2.2 %	4/26	23.7 °C	14.9 h
26 June – 2 July	×0.7	3.8 %	5/26	24.5 °C	14.9 h
3 July – 9 July	×1.3	6.6 %	7/26	24.8 °C	14.8 h
10 July – 16 July	×0.9	4.9 %	5/26	26.0 °C	14.7 h
17 July – 23 July	×0.9	4.9 %	6/26	26.7 °C	14.5 h
24 July – 30 July	×1.2	6.0 %	7/26	26.0 °C	14.4 h
31 July – 6 Aug	×1.2	6.0 %	6/26	26.1 °C	14.2 h
7 Aug – 13 Aug	×0.4	2.2 %	3/26	26.4 °C	13.9 h
14 Aug – 20 Aug	×0.8	4.4 %	5/26	27.4 °C	13.7 h
21 Aug – 27 Aug	×0.5	2.7 %	3/26	27.1 °C	13.4 h
28 Aug – 3 Sept	×1.3	6.6 %	8/26	26.1 °C	13.1 h
4 Sept – 10 Sept	×1.1	5.5 %	6/26	26.0 °C	12.8 h
11 Sept – 17 Sept	×1.3	6.9 %	6/26	25.4 °C	12.5 h

Risk index: ×1.0 = the area’s own summer average. “Summers affected” counts, out of 26, how many summers actually saw a hard day in that slot — below 4, it is an accident, not a regime. Sea in °C (2023-2025 average), daylight in hours.

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The island’s shadow

The mistral that sweeps the Strait of Bonifacio reaches the south much weakened: the whole Sardinian relief stands in the way. The result is a hard-day threshold of 20 knots and a season that is gentler overall than on the island’s east coast.

The trap is the same as everywhere in the western basin: the week of 15 to 21 May is the worst of the summer, at two and a half times the norm. Five of our ten Mediterranean areas put their risk peak on that same week — the Mediterranean switches to its summer regime later than people assume.

How these figures are produced

Hourly ERA5 reanalysis over 26 summers (2000-2025) at an open-sea point, calibrated against stations that actually measure — the AEMET, Météo-France and NOAA networks. The “hard day” threshold is the local 95^th percentile, never a shared value: 20.0 knots here. The comparison is made on ranks, not on knots, because the gap between measured and modelled gusts ranges from half a knot to thirty-one depending on the coast.

One caveat, because it matters: this index measures frequency, not severity. A week rated very calm can still hold the worst day of the decade.

Frequently asked questions

Is South Sardinia windy?

Less than the north of the island. The hard-day threshold is 20 knots there against 25.1 in the Strait of Bonifacio. The trade-off is slightly more calm at the height of summer.

Sail with your people — friends, family, colleagues. Private yacht, your group only. Tell us your week and we build the trip with you. Plan your week.

This page covers one sailing ground. To compare all four side by side — which sea is calmest in which week, and when the water is actually warm — see the best time to sail the Mediterranean, island by island.

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