May
Crowd: LowAir: 22°C / 72°F · Sea: 18–20°C / 64–68°F
Great for hiking, cool for swimming.
Trip planning
Best Time to Visit Sardinia
The short answer: June or September. The long answer: it depends on what you want. Month-by-month below.
The 30-second version
- Best overall: mid-June and September. Warm sea, open everything, half the crowd of August.
- Best for swimming: late July to mid-September. Sea at 24–25°C.
- Best for hiking / sightseeing: May and early October. Cool days, wildflowers or harvest.
- Best for value: May and late September to mid-October. Prices drop 30–50%.
- Avoid unless you love crowds: August 5–20 (Ferragosto). Beach parking fills at dawn.
Month by month in North Sardinia
June
Crowd: MediumAir: 26°C / 79°F · Sea: 21–22°C / 70–72°F
Sweet spot — warm sea, no crowds.
July
Crowd: HighAir: 30°C / 86°F · Sea: 24°C / 75°F
Hot and busy, sea at its warmest.
August
Crowd: Very highAir: 31°C / 88°F · Sea: 25°C / 77°F
Peak everything. Ferragosto (Aug 15).
September
Crowd: MediumAir: 27°C / 81°F · Sea: 24°C / 75°F
Best month overall. Warm, quiet, open.
October
Crowd: LowAir: 23°C / 73°F · Sea: 22°C / 72°F
First half glorious, second half closing down.
For U.S. travelers on Delta JFK–Olbia
Delta's nonstop New York-JFK → Olbia runs from late May to early October, 4 times a week. That aligns almost perfectly with the ideal window: catch the tail end of shoulder season in early June or late September for the best sea + fewer crowds + nonstop flight. Booking JFK–OLB roundtrip for the last week of September is one of the highest-value trips you can plan.
Where to stay whenever you go
Vento e Mare — five self-catering apartments in Palau, open year-round, with air conditioning for July heat and heating for spring evenings. Free private parking and 24/7 self check-in whatever hour you land.
Frequently asked questions
What's the best month to visit Sardinia?
June and September. Sea is 22–24°C / 72–75°F, air 25–28°C / 77–82°F, everything is open, and prices are 30–50% lower than August. May and early October are excellent for hiking and sightseeing but the sea is cool for U.S. swimmers used to warmer water. July and August are hot and crowded but the sea is at its warmest.
Is Sardinia too hot in July and August?
Daytime highs run 29–33°C / 84–91°F in Palau, hotter inland. It's manageable near the coast with sea breezes, but beach parking fills by 10:30am and restaurants require reservations. If you can travel in June or September, do — same beaches, half the stress.
Can you swim in Sardinia in May?
Cold-water swimmers, yes — sea is 18–20°C / 64–68°F. Most Americans find it too chilly for more than a quick dip. By late May it climbs toward 21°C. If swimming is the trip's main point, aim for mid-June onward.
What about October?
First half is beautiful — 24–26°C air, 22°C sea, half-empty beaches, harvest festivals. From mid-October many beach clubs and boat tours close for the season. Delta's JFK–Olbia nonstop usually ends in early October, so plan flights accordingly.
Is it worth going to Sardinia in winter?
For hiking and food-focused trips, yes — but this isn't a beach trip. December–March you get 12–15°C days, dramatic empty coastlines, and prices at their lowest. Many restaurants and hotels in Palau close November to March; check before you book.
When is the La Maddalena boat tour season?
Typically Easter through late October, with peak frequency (multiple daily departures) from mid-June to mid-September. In shoulder season expect one departure per day depending on weather.
When is the cheapest time to visit Sardinia?
May and late September to mid-October — flight and accommodation prices drop 30–50% versus August, and the weather is often better. Avoid the 10 days around Ferragosto (Italian national holiday, August 15) when everything doubles in price.