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Southampton · July · warmth

Warmest places to go from Southampton in July

In July, the warmest well-known place within 15 hours of Southampton is Aswan, Egypt, averaging 36.0 °C across day and night and 12.2 h sun a day, about 9h 6m each way by air. Without flying, it is Cannes, France, averaging 26.4 °C across day and night, about 14h 12m each way by train, for about 25× less carbon (39.4 kg CO₂e return against 979 kg).

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

The 10 warmest places within 15 hours of Southampton

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.

  1. Aswan, Egypt36.0 °C · 12.2 h sun a day · mostly dryair ≈ 9h 6m · 979 kg CO₂e return
  2. Sharm el-Sheikh, Egypt35.9 °C · 13.0 h sun a day · mostly dry · sea 29.5 °Cair ≈ 8h 42m · 920 kg CO₂e return
  3. Luxor, Egypt35.8 °C · 12.4 h sun a day · mostly dryair ≈ 8h 54m · 941 kg CO₂e return
  4. Aqaba, Jordan34.8 °C · 13.1 h sun a day · mostly dry · sea 28.2 °Cair ≈ 8h 36m · 898 kg CO₂e return
  5. Kairouan, Tunisia32.8 °C · 12.9 h sun a day · mostly dryair ≈ 6h 6m · 485 kg CO₂e return
  6. Sanliurfa, Turkey32.8 °C · 13.4 h sun a day · mostly dryair ≈ 8h 12m · 881 kg CO₂e return
  7. Batman, Turkey32.2 °C · 13.3 h sun a day · mostly dryair ≈ 8h 18m · 909 kg CO₂e return
  8. Marmaris, Turkey31.9 °C · 13.9 h sun a day · mostly dryair ≈ 7h 18m · 708 kg CO₂e return
  9. Tataouine, Tunisia31.8 °C · 12.9 h sun a day · mostly dryair ≈ 6h 30m · 558 kg CO₂e return
  10. Ouarzazate, Morocco31.6 °C · 12.0 h sun a day · mostly dryair ≈ 6h 30m · 571 kg CO₂e return

Without flying

The warmest places the train reaches within 15 hours. Cannes is 26.4 °C for 39.4 kg — about 25× less carbon than flying to Aswan.

  1. Cannes, France26.4 °C · 14.3 h sun a day · mostly dry · sea 25.5 °Crail ≈ 14h 12m · 39.4 kg CO₂e return
  2. Toulon, France26.2 °C · 14.0 h sun a day · mostly dry · sea 23.4 °Crail ≈ 12h 24m · 39.6 kg CO₂e return
  3. Perpignan, France25.7 °C · 13.1 h sun a day · mostly dry · sea 22.7 °Crail ≈ 13h 30m · 38.6 kg CO₂e return
  4. Avignon, France25.4 °C · 13.7 h sun a day · mostly dryrail ≈ 11h 12m · 36.0 kg CO₂e return
  5. Turin, Italy24.6 °C · 13.4 h sun a day · 1.9 mm rain a dayrail ≈ 14h 12m · 36.1 kg CO₂e return
  6. Bellinzona, Switzerland23.6 °C · 13.2 h sun a day · 4.1 mm rain a dayrail ≈ 14h 54m · 35.3 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 Southampton in July within 15 hours is Nefta, 36.0 °C, costing 513 kg CO₂e return. The lowest-carbon option is Exeter at 12.1 kg — 42× less carbon, for 19.8 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.

ExeterNefta
Where they are. Solid lines are rail or ferry, dashed are flights, from Southampton. Pick one to compare.
Carbon against warmth, July, departing Southampton. Journeys of up to 15 hours each way.19 destinations. Lowest carbon Exeter at 12.1 kilograms and 16.2 °C; best for warmth Nefta at 513 kilograms and 36.0 °C. Exeter · 12.1 kgCannes · 39.4 kgAlcalá de Henares · 294 kgNefta · 513 kg

By rail or ferry By air

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

What the 15-hour limit costs: at this budget Andujar can only be reached by air — 364 kg CO₂e, in 5h 24m. Allow up to 24 hours and the train does the same journey for 54.1 kg in 22h 54m — 7× less carbon for 17h 30m more travelling.

July from Southampton — 19 destinations on the frontier, 12 without flying.
DestinationHowCO₂e returnTempSun/dayRain/dayJourney
Exeter, United KingdomRail12.1 kg16.2 °C10.1 h3.1 mm3h 42m
Chelmsford, United KingdomRail12.8 kg17.2 °C10.7 h3.1 mm3h 48m
Dunkirk, FranceRail14.3 kg17.9 °C11.2 h2.7 mm7h 42m
Amiens, FranceRail16.3 kg18.7 °C10.8 h2.4 mm8h 12m
Paris, FranceRail19.1 kg20.0 °C11.2 h2.6 mm7h 6m
Bourges, FranceRail24.4 kg20.3 °C11.4 h2.7 mm10h 54m
Chalon-sur-Saône, FranceRail27.8 kg21.2 °C12.4 h2.9 mm11h 36m
Lyon, FranceRail30.7 kg22.5 °C13.0 h3.1 mm10h 18m
Romans-sur-Isère, FranceRail33.0 kg23.5 °C13.7 h1.6 mm12h 6m
Orange, FranceRail35.5 kg25.3 °C13.7 h0.9 mm12h 6m
Avignon, FranceRail36.0 kg25.4 °C13.7 h1.0 mm11h 12m
Cannes, FranceRail39.4 kg26.4 °C14.3 h0.2 mm14h 12m
Alcalá de Henares, SpainAir294 kg27.8 °C14.0 h0.0 mm5h 6m
Aranjuez, SpainAir307 kg28.9 °C14.0 h0.0 mm5h 6m
Andujar, SpainAir364 kg30.9 °C13.6 h0.0 mm5h 24m
Kairouan, TunisiaAir485 kg32.8 °C12.9 h0.0 mm6h 6m
Ar Rudayyif, TunisiaAir501 kg33.3 °C12.9 h0.0 mm6h 12m
Metlaoui, TunisiaAir505 kg34.3 °C12.9 h0.0 mm6h 12m
Nefta, TunisiaAir513 kg36.0 °C12.9 h0.0 mm6h 12m

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 Cannes (39.4 kg, 26.4 °C) to Alcalá de Henares (294 kg, 27.8 °C) buys 1.4 °C more warmth for an extra 254 kg — 182 kg of CO₂e per degree. That single step is the most expensive warmth on the whole curve.

The pick of them

Exeter, United KingdomExeterUnited Kingdom12.1 kg CO₂e return16.2 °C · 10.1 h sun · 3h 42m by railwarm but wetCannes, FranceCannesFrance39.4 kg CO₂e return26.4 °C · 14.3 h sun · 14h 12m by railwarm, bright and dryNefta, TunisiaNeftaTunisia513 kg CO₂e return36.0 °C · 12.9 h sun · 6h 12m 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 Southampton

July from elsewhere

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Questions

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

Nefta, Tunisia, at 36.0 °C. Reaching it emits 513 kg CO₂e return, travelling 6h 12m each way by air (modelled).

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

Yes. Cannes reaches 26.4 °C and is reachable by rail or ferry in 14h 12m (modelled), emitting 39.4 kg CO₂e return — though Nefta is warmer still, if you fly.

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

513 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.