0xCarbon
Southampton · September · warmth

Warmest places to go from Southampton in September

In September, the warmest well-known place within 15 hours of Southampton is Aswan, Egypt, averaging 34.1 °C across day and night and 11.5 h sun a day, about 9h 6m each way by air. Without flying, it is Toulon, France, averaging 21.3 °C across day and night, about 12h 24m each way by train, for about 25× less carbon (39.6 kg CO₂e return against 979 kg).

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

The 10 warmest places within 15 hours of Southampton

Ranked on warmth in September 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, Egypt34.1 °C · 11.5 h sun a day · mostly dryair ≈ 9h 6m · 979 kg CO₂e return
  2. Sharm el-Sheikh, Egypt33.7 °C · 11.5 h sun a day · mostly dry · sea 28.7 °Cair ≈ 8h 42m · 920 kg CO₂e return
  3. Luxor, Egypt33.6 °C · 11.6 h sun a day · mostly dryair ≈ 8h 54m · 941 kg CO₂e return
  4. Aqaba, Jordan31.5 °C · 11.4 h sun a day · mostly dry · sea 27.8 °Cair ≈ 8h 36m · 898 kg CO₂e return
  5. Sanliurfa, Turkey27.7 °C · 11.4 h sun a day · mostly dryair ≈ 8h 12m · 881 kg CO₂e return
  6. Adana, Turkey27.5 °C · 11.1 h sun a day · 1.5 mm rain a dayair ≈ 7h 54m · 824 kg CO₂e return
  7. Famagusta, Cyprus27.1 °C · 11.4 h sun a day · mostly dry · sea 28.6 °Cair ≈ 7h 54m · 835 kg CO₂e return
  8. Kairouan, Tunisia27.0 °C · 10.7 h sun a day · mostly dryair ≈ 6h 6m · 485 kg CO₂e return
  9. Rhodes, Greece27.0 °C · 11.8 h sun a day · mostly dry · sea 27.4 °Cair ≈ 7h 18m · 716 kg CO₂e return
  10. Batman, Turkey26.8 °C · 11.6 h sun a day · mostly dryair ≈ 8h 18m · 909 kg CO₂e return

Without flying

The warmest places the train reaches within 15 hours. Toulon is 21.3 °C for 39.6 kg — about 25× less carbon than flying to Aswan.

  1. Toulon, France21.3 °C · 10.6 h sun a day · 2.1 mm rain a day · sea 23.3 °Crail ≈ 12h 24m · 39.6 kg CO₂e return
  2. Perpignan, France21.3 °C · 10.1 h sun a day · mostly dry · sea 21.4 °Crail ≈ 13h 30m · 38.6 kg CO₂e return
  3. Nice, France21.2 °C · 10.3 h sun a day · 3.3 mm rain a day · sea 24.2 °Crail ≈ 14h 12m · 39.3 kg CO₂e return
  4. Avignon, France20.1 °C · 10.3 h sun a day · 3.1 mm rain a dayrail ≈ 11h 12m · 36.0 kg CO₂e return
  5. Turin, Italy18.7 °C · 9.6 h sun a day · 3.5 mm rain a dayrail ≈ 14h 12m · 36.1 kg CO₂e return
  6. Bellinzona, Switzerland18.6 °C · 8.9 h sun a day · 7.3 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 September within 15 hours is Sharm el-Sheikh, 33.7 °C, costing 920 kg CO₂e return. The lowest-carbon option is Exeter at 12.1 kg — 76× less carbon, for 18.3 degrees less warmth.

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

ExeterSharm el-Sheikh
Where they are. Solid lines are rail or ferry, dashed are flights, from Southampton. Pick one to compare.
Carbon against warmth, September, departing Southampton. Journeys of up to 15 hours each way.17 destinations. Lowest carbon Exeter at 12.1 kilograms and 15.4 °C; best for warmth Sharm el-Sheikh at 920 kilograms and 33.7 °C. Exeter · 12.1 kgCannes · 39.4 kgValencia · 320 kgSharm el-Sheikh · 920 kg

By rail or ferry By air

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

What the 15-hour limit costs: at this budget Palma del Rio can only be reached by air — 377 kg CO₂e, in 5h 30m. Allow up to 24 hours and the train does the same journey for 55.8 kg in 23h — 7× less carbon for 17h 30m more travelling.

September from Southampton — 17 destinations on the frontier, 8 without flying.
DestinationHowCO₂e returnTempSun/dayRain/dayJourney
Exeter, United KingdomRail12.1 kg15.4 °C7.7 h4.6 mm3h 42m
Chelmsford, United KingdomRail12.8 kg16.4 °C8.5 h2.7 mm3h 48m
Dunkirk, FranceRail14.3 kg17.3 °C8.8 h3.0 mm7h 42m
Bourges, FranceRail24.4 kg18.0 °C9.0 h2.8 mm10h 54m
Villeneuve-sur-Lot, FranceRail32.3 kg19.1 °C9.9 h4.0 mm12h 48m
Avignon, FranceRail36.0 kg20.1 °C10.3 h3.1 mm11h 12m
Perpignan, FranceRail38.6 kg21.3 °C10.1 h1.1 mm13h 30m
Cannes, FranceRail39.4 kg21.7 °C10.3 h3.3 mm14h 12m
Valencia, SpainAir320 kg22.9 °C10.6 h3.5 mm5h 12m
Alzira, SpainAir329 kg23.3 °C10.1 h2.4 mm5h 12m
Palma del Rio, SpainAir377 kg24.4 °C10.9 h0.9 mm5h 30m
Bizerte, TunisiaAir442 kg25.4 °C10.8 h0.4 mm5h 48m
Kairouan, TunisiaAir485 kg27.0 °C10.7 h0.7 mm6h 6m
Nefta, TunisiaAir513 kg29.6 °C10.2 h0.2 mm6h 12m
Assiut, EgyptAir890 kg31.6 °C11.7 h0.0 mm8h 36m
Sohag, EgyptAir910 kg32.3 °C11.7 h0.0 mm8h 42m
Sharm el-Sheikh, EgyptAir920 kg33.7 °C11.5 h0.0 mm8h 42m

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, 21.7 °C) to Valencia (320 kg, 22.9 °C) buys 1.2 °C more warmth for an extra 281 kg — 234 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 return15.4 °C · 7.7 h sun · 3h 42m by railwarm but wetCannes, FranceCannesFrance39.4 kg CO₂e return21.7 °C · 10.3 h sun · 14h 12m by railwarm but wetSharm el-Sheikh, EgyptSharm el-SheikhEgypt920 kg CO₂e return33.7 °C · 11.5 h sun · 8h 42m by airwarm, bright and dry

The same month, asked differently

September 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 Sharm el-Sheikh

Places to stay in Sharm el-Sheikh, Egypt, on a live map. Prices and availability come from Stay22 and its booking partners.

Search places to stay in Sharm el-Sheikh →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

September from elsewhere

Photo credits

Questions

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

Sharm el-Sheikh, Egypt, at 33.7 °C. Reaching it emits 920 kg CO₂e return, travelling 8h 42m each way by air (modelled).

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

Yes. Cannes reaches 21.7 °C and is reachable by rail or ferry in 14h 12m (modelled), emitting 39.4 kg CO₂e return — though Sharm el-Sheikh is warmer still, if you fly.

How much carbon does a return trip from Southampton to Sharm el-Sheikh produce?

920 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.