Hiking in Sardinia in Summer: Heat, Fire Season and Which Trails Still Work

July is the driest month of the year at Nuoro, with only about 12 mm of rain against an annual total of roughly 705 mm spread across 88 rainy days. August runs almost identical on temperature and slightly wetter. June is the honest shoulder month for anyone who can move their dates: five degrees cooler on the average high and still dry enough to trust.

These are long-term normals for Nuoro, cross-checked across published climate datasets, not a single station's raw readings, so treat any given week as capable of running hotter.

The numbers from the July 2026 heatwave are the clearest picture of what a bad week looks like. ARPA Sardegna, the regional environmental protection agency, recorded 47.8°C at Uta Santa Lucia on 17 July 2026, within half a degree of the all-time regional record of 48.2°C set at Jerzu and Lotzorai in July 2023. Between 14 and 17 July, 233 of the region's 308 weather stations, about 75 per cent, passed 40°C, and 53 stations passed 45°C. Nuoro itself, an inland town used to milder summers than the coast, reached 40°C on 19 July and 42°C on 21 July.

Altitude helps, but not as much as people assume. Air cools by roughly 0.6°C for every 100 m of elevation gained, so a trailhead at 900 to 1,000 m in the Supramonte runs about 6°C cooler than the coast on the same day. That is a real, useful difference on a merely hot day.

On a day like 17 July 2026, it is the gap between dangerous and very dangerous, not between hard and comfortable. Treat the 6°C figure as an approximation, not a guarantee, and plan the day around the hour rather than the altitude alone.

Italy's Ministero della Salute heat guidance is straightforward: avoid physical effort outdoors between 11:00 and 18:00 during a heatwave, and keep exertion to the early morning or after sunset. A national heat helpline, 1500, runs through the summer for anyone who needs it. On a Sardinian trail that translates into a simple rule: be walking by seven, and be back at the car or the pickup point well before the eleven o'clock line, not arriving at it.

This is exactly why the shorter guided days earn their place in summer. The Cagliari sunset walk to the lighthouse is built the other way around the clock, departing in the evening once the worst of the heat has broken, and the Porto Conte trek near Alghero runs inside a shaded park for two and a half hours rather than committing you to a full exposed day. If you are set on a longer canyon day in midsummer, ask about the earliest available start and plan to be well off the trail before midday, not merely underway.

• Start by 06:30 to 07:00 on any exposed route in July or August
• Treat 11:00 as the line you are back inside of, not the line you are still walking towards
• Evening departures, like the sunset lighthouse walk, sidestep the worst hours entirely
• A shaded, short walk beats a long exposed one on a heatwave day, regardless of how fit you are

The pattern is simple once you see it: the two eight-hour canyon and cave days carry the least shade and the most sustained exposure, which is exactly what a 40°C afternoon punishes hardest. If your dates are fixed inside July or August and one of those two is the plan, ask for the earliest possible departure and be candid with yourself about how the heat will feel four or five hours in. The gorge itself, its ticket hours and access routes, are covered in full on our Gola su Gorropu guide.

Sardinia's period of high forest-fire danger runs from 1 June to 31 October, set for 2026 by the regional government's deliberation n. 28/56 of 4 June 2026, inside the region's 2026 to 2028 anti-fire plan. The dates can be extended or shortened if conditions demand it, so treat 1 June to 31 October as the default window rather than a fixed rule. The regional civil protection service publishes a daily fire-danger bulletin covering 25 alert zones with four levels, bassa, media, alta and estrema, issued each afternoon for the following day.

There is no standing rule that a given alert level automatically closes a trail. Restrictions and closures are announced case by case by the civil protection service and the Corpo Forestale, tied to specific areas and specific conditions, not to the calendar alone. If you are hiking during the fire-danger period, check the current bulletin for the zone you are walking in rather than assuming a green light because nothing has been announced.

Report a fire on 1515, the Corpo Forestale's dedicated number, or on the general emergency line 112.

• High fire-danger period: 1 June to 31 October, adjustable by the region
• Daily bulletin: 25 alert zones, four levels, issued each afternoon
• No blanket rule closes trails at any alert level; closures are announced case by case
• Report a fire: 1515 (Corpo Forestale) or 112
• The maestrale wind, strongest November to March, is what turns a small summer fire into a large one fast

Springs in the Supramonte and Gennargentu are route-specific and cannot be counted on in summer. No park or CAI statement promises reliable summer water across the network, so treat every trail as dry unless you have confirmed otherwise for that specific route. There is no official Italian figure for exactly how much to carry, but mountain-medicine and trekking sources converge on roughly two litres for a half day and three to four litres for a full hot day, drunk steadily rather than saved for the end.

A drinking-water point sits close to the entrance of the Gola su Gorropu, but the trails themselves carry none, and phone coverage inside the gorge is unreliable to non-existent. Full ticket, access and entry-point detail for Gorropu lives on our dedicated guide; the point here is simpler: whatever you carry in is what you have until you are back at the car. If a route on Sardinia's guided hiking calendar doesn't say otherwise, plan for it to be dry.

What to carry on a July or August walk

• Two to four litres of water depending on the length and exposure of the route
• A hat with real coverage and sunscreen reapplied through the day, not just at the start
• Light, breathable, loose clothing rather than tight technical layers
• A phone charged and loaded with an offline map before you start, since coverage drops in the gorges
• Salty snacks or electrolyte tablets for a full day in the heat
• Cash for any trail or park ticket paid on site, several accept cash only
• The emergency numbers 112 and 1515 saved or written down before you lose signal