Barcelona · July · warmth

Warmest places to go from Barcelona in July

In July, the warmest well-known place within 15 hours of Barcelona is Aswan, Egypt, averaging 36.0 °C across day and night and 12.2 h sun a day, about 8h 6m each way by air. Without flying, it is Seville, Spain, averaging 29.3 °C across day and night, about 7h 30m each way by train, for about 35× less carbon (24.4 kg CO₂e return against 863 kg).

Every city at once, with and without flying: where is hot in July.

The 10 warmest places within 15 hours of Barcelona

Ranked on warmth in July alone, among well-known places (a Wikivoyage travel guide and at least 40,000 Wikipedia readers a year), one per area and at most three per country. The carbon is shown, not used to choose: the list further down is the other question, how much warmth each extra kilogram buys.

Aswan, Egypt36.0 °C · 12.2 h sun a day · mostly dryair ≈ 8h 6m · 863 kg CO₂e return
Sharm el-Sheikh, Egypt35.9 °C · 13.0 h sun a day · mostly dry · sea 29.5 °Cair ≈ 7h 54m · 824 kg CO₂e return
Luxor, Egypt35.8 °C · 12.4 h sun a day · mostly dryair ≈ 7h 54m · 829 kg CO₂e return
Aqaba, Jordan34.8 °C · 13.1 h sun a day · mostly dry · sea 28.2 °Cair ≈ 7h 48m · 812 kg CO₂e return
Kairouan, Tunisia32.8 °C · 12.9 h sun a day · mostly dryair ≈ 4h 42m · 236 kg CO₂e return
Sanliurfa, Turkey32.8 °C · 13.4 h sun a day · mostly dryair ≈ 7h 42m · 796 kg CO₂e return
Batman, Turkey32.2 °C · 13.3 h sun a day · mostly dryair ≈ 7h 54m · 838 kg CO₂e return
Marmaris, Turkey31.9 °C · 13.9 h sun a day · mostly dryair ≈ 6h 36m · 578 kg CO₂e return
Tataouine, Tunisia31.8 °C · 12.9 h sun a day · mostly dryair ≈ 5h 6m · 300 kg CO₂e return
Ouarzazate, Morocco31.6 °C · 12.0 h sun a day · mostly dryair ≈ 5h 24m · 357 kg CO₂e return

Without flying

The warmest places the train reaches within 15 hours. Seville is 29.3 °C for 24.4 kg — about 35× less carbon than flying to Aswan.

Seville, Spain29.3 °C · 13.2 h sun a day · mostly dryrail ≈ 7h 30m · 24.4 kg CO₂e return
Granada, Spain29.0 °C · 13.5 h sun a day · mostly dryrail ≈ 8h 18m · 20.1 kg CO₂e return
Almería, Spain28.7 °C · 13.4 h sun a day · mostly dry · sea 24.8 °Crail ≈ 10h 6m · 19.0 kg CO₂e return
Terni, Italy28.3 °C · 13.8 h sun a day · mostly dryrail ≈ 14h 42m · 25.8 kg CO₂e return
Madrid, Spain28.1 °C · 14.0 h sun a day · mostly dryrail ≈ 4h · 14.9 kg CO₂e return
Rome, Italy28.0 °C · 13.9 h sun a day · mostly dryrail ≈ 14h 30m · 25.4 kg CO₂e return

≈ is the model's estimate (air times include getting to and through the airport); ✓ is a rail journey checked against a real timetable, with the date it was checked. Temperatures are historical daily means for 2023–2024, averaged across day and night, so afternoons run warmer.

The low-carbon trade-off

The warmest place you can reach from Barcelona in July within 15 hours is Nefta, 36.0 °C, costing 245 kg CO₂e return. The lowest-carbon option is Tortosa at 4.5 kg — 55× less carbon, for 9.2 degrees less warmth.

Every destination here is on the efficiency frontier: nowhere else this site covers is both warmer in July and lower in carbon. Anything a better option beats outright has been left out.

Where they are. Solid lines are rail or ferry, dashed are flights, from Barcelona. Pick one to compare.

By rail or ferry By air

Carbon against warmth, July, departing Barcelona. Journeys of up to 15 hours each way.

July from Barcelona — 8 destinations on the frontier, 4 without flying.
Destination	How	CO₂e return	Temp	Sun/day	Rain/day	Journey
Tortosa, Spain	Rail	4.5 kg	26.8 °C	12.9 h	0.7 mm	3h 42m
Alzira, Spain	Rail	9.8 kg	28.4 °C	13.3 h	0.4 mm	5h 36m
Murcia, Spain	Rail	13.9 kg	28.8 °C	13.6 h	0.0 mm	7h 42m
Andujar, Spain	Rail	19.1 kg	30.9 °C	13.6 h	0.0 mm	8h 24m
Jendouba, Tunisia	Air	199 kg	32.2 °C	12.8 h	0.0 mm	4h 36m
Ar Rudayyif, Tunisia	Air	236 kg	33.3 °C	12.9 h	0.0 mm	4h 48m
Metlaoui, Tunisia	Air	241 kg	34.3 °C	12.9 h	0.0 mm	4h 48m
Nefta, Tunisia	Air	245 kg	36.0 °C	12.9 h	0.0 mm	4h 48m

Warm is not the same as pleasant, which is why sunshine and rainfall are shown alongside temperature. All three are ERA5 monthly means for 2023–2024.

Where the curve breaks

The frontier is gentle until it isn't. Going from Andujar (19.1 kg, 30.9 °C) to Jendouba (199 kg, 32.2 °C) buys 1.3 °C more warmth for an extra 179 kg — 138 kg of CO₂e per degree. That single step is the most expensive warmth on the whole curve.

The pick of them

TortosaSpain4.5 kg CO₂e return26.8 °C · 12.9 h sun · 3h 42m by railwarm, bright and dry AndujarSpain19.1 kg CO₂e return30.9 °C · 13.6 h sun · 8h 24m by railwarm, bright and dry

NeftaTunisia245 kg CO₂e return36.0 °C · 12.9 h sun · 4h 48m by airwarm, bright and dry

The same month, asked differently

July answers differently depending on what you are after, and the lists genuinely diverge: the brightest places are not the hottest, and in summer the useful question stops being where is warm at all.

Where to stay in Nefta

Places to stay in Nefta, Tunisia, on a live map. Prices and availability come from Stay22 and its booking partners.

Search places to stay in Nefta →Opens the booking search in a new tab. Same partners as the map below.

Affiliate disclosure. A booking made through this map may earn 0xCarbon a commission, at no extra cost to you. It changes nothing above it: the emissions figures come from UK Government conversion factors and are computed before anyone is paid anything.See the method.

Other months from Barcelona

July from elsewhere

Photo credits

Nefta: Majdi Sedik1994, CC BY-SA 4.0, via Wikimedia Commons
Aswan: Vyacheslav Argenberg, CC BY 4.0, via Wikimedia Commons
Sharm el-Sheikh: Tanya Dedyukhina, CC BY 3.0, via Wikimedia Commons
Luxor: Roland Unger, CC BY-SA 3.0, via Wikimedia Commons
Aqaba: Sana Janakat, CC BY-SA 4.0, via Wikimedia Commons
Kairouan: Unknown authorUnknown author, Public domain, via Wikimedia Commons
Sanliurfa: Damien Halleux Radermecker, CC BY-SA 2.0, via Wikimedia Commons
Batman: Ferhat 72 at Turkish Wikipedia, Public domain, via Wikimedia Commons
Marmaris: Mstyslav Chernov, CC BY-SA 3.0, via Wikimedia Commons
Tataouine: Averater, CC BY-SA 3.0, via Wikimedia Commons
Ouarzazate: Bjørn Christian Tørrissen, CC BY-SA 3.0, via Wikimedia Commons
Seville: Diliff, CC BY-SA 3.0, via Wikimedia Commons
Almería: Javier rodriguez jimenez, CC BY-SA 4.0, via Wikimedia Commons
Rome: Bert Kaufmann from Roermond, Netherlands, CC BY-SA 2.0, via Wikimedia Commons

Questions

Where is the warmest place to go from Barcelona in July?

Nefta, Tunisia, at 36.0 °C. Reaching it emits 245 kg CO₂e return, travelling 4h 48m each way by air (modelled).

Can I get somewhere warm from Barcelona in July without flying?

Yes. Andujar reaches 30.9 °C and is reachable by rail or ferry in 8h 24m (modelled), emitting 19.1 kg CO₂e return — though Nefta is warmer still, if you fly.

How much carbon does a return trip from Barcelona to Nefta produce?

245 kg CO₂e for one person, return, by air. That uses the UK Government's 2026 conversion factors, including radiative forcing for flights.

Carbon uses UK Government (DESNZ/DEFRA) 2026 conversion factors applied to great-circle distance, with radiative forcing included for flights. Rail journey times are modelled estimates, not timetabled services. Full method · download the data.