Warmest places to go from Southampton in September
The warmest place you can reach from Southampton in September within 15 hours is Sharm el-Sheikh at 33.7 °C, costing 920 kg CO₂e return. The lowest-carbon option is Exeter at 12.1 kg — 76× less carbon for 18.3 °C less.
Every destination here is on the efficiency frontier: nowhere else in Europe is both warmer in September and lower in carbon. Anything a better option beats outright has been left out.
By rail or ferry By air
What the 15-hour limit costs: at this budget Valencia can only be reached by air — 320 kg CO₂e, in 5h 12m. Allow up to 24 hours and the train does the same journey for 48.4 kg in 21h 48m — 7× less carbon for 16h 36m more travelling.
| Destination | How | CO₂e return | Temp | Sun/day | Rain/day | Journey |
|---|---|---|---|---|---|---|
| Exeter, United Kingdom | Rail | 12.1 kg | 15.4 °C | 7.7 h | 4.6 mm | 4h 6m |
| Chelmsford, United Kingdom | Rail | 12.8 kg | 16.4 °C | 8.5 h | 2.7 mm | 4h 12m |
| Dunkirk, France | Rail | 14.3 kg | 17.3 °C | 8.8 h | 3.0 mm | 6h |
| Bourges, France | Rail | 24.4 kg | 18.0 °C | 9.0 h | 2.8 mm | 10h 42m |
| Villeneuve-sur-Lot, France | Rail | 32.3 kg | 19.1 °C | 9.9 h | 4.0 mm | 14h 24m |
| Nîmes, France | Air | 226 kg | 20.3 °C | 10.4 h | 2.3 mm | 4h 42m |
| Perpignan, France | Air | 244 kg | 21.3 °C | 10.1 h | 1.1 mm | 4h 48m |
| Cannes, France | Air | 260 kg | 21.7 °C | 10.3 h | 3.3 mm | 4h 54m |
| Valencia, Spain | Air | 320 kg | 22.9 °C | 10.6 h | 3.5 mm | 5h 12m |
| Alzira, Spain | Air | 329 kg | 23.3 °C | 10.1 h | 2.4 mm | 5h 12m |
| Ibiza Town, Spain | Air | 340 kg | 24.2 °C | 10.8 h | 1.6 mm | 5h 18m |
| Bizerte, Tunisia | Air | 442 kg | 25.4 °C | 10.8 h | 0.4 mm | 5h 48m |
| Kairouan, Tunisia | Air | 485 kg | 27.0 °C | 10.7 h | 0.7 mm | 6h 6m |
| Tozeur, Tunisia | Air | 513 kg | 29.4 °C | 10.3 h | 0.3 mm | 6h 12m |
| Zaafarana, Egypt | Air | 872 kg | 30.2 °C | 11.7 h | 0.0 mm | 8h 30m |
| Assiut, Egypt | Air | 890 kg | 31.6 °C | 11.7 h | 0.0 mm | 8h 36m |
| Sohag, Egypt | Air | 910 kg | 32.3 °C | 11.7 h | 0.0 mm | 8h 42m |
| Sharm el-Sheikh, Egypt | Air | 920 kg | 33.7 °C | 11.5 h | 0.0 mm | 8h 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 Tozeur (513 kg, 29.4 °C) to Zaafarana (872 kg, 30.2 °C) buys 0.8 °C more warmth for an extra 359 kg — 448 kg of CO₂e per degree. That single step is the most expensive warmth on the whole curve.
The pick of them
If you'd rather have sunshine than heat
September answers differently depending on what you're after. The sunniest destinations from Southampton in September are a different list — the brightest places are not always the hottest, and in winter the difference is large.
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.
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
- Amsterdam
- Barcelona
- Berlin
- Birmingham
- Bristol
- Brussels
- Cardiff
- Copenhagen
- Dublin
- Edinburgh
- Frankfurt
- Glasgow
- Leeds
- Lisbon
- Liverpool
- London
- Madrid
- Manchester
- Milan
- Munich
- Newcastle
- Nottingham
- Oslo
- Paris
- Prague
- Rome
- Sheffield
- Southampton
- Stockholm
- Vienna
- Warsaw
- Zurich
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.
Can I get somewhere warm from Southampton in September without flying?
Yes. Villeneuve-sur-Lot reaches 19.1 °C and is reachable by rail or ferry in 14h 24m, emitting 32.3 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.