Southampton · August · warmth

Warmest places to go from Southampton in August

The warmest place you can reach from Southampton in August within 15 hours is Kom Ombo at 36.8 °C, costing 971 kg CO₂e return. The lowest-carbon option is Exeter at 12.1 kg — 80× less carbon for 20.0 °C less.

Every destination here is on the efficiency frontier: nowhere else in Europe is both warmer in August 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 Southampton. Pick one to compare.

By rail or ferry By air

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

What the 15-hour limit costs: at this budget Aranjuez can only be reached by air — 307 kg CO₂e, in 5h 6m. Allow up to 24 hours and the train does the same journey for 47.4 kg in 21h 24m — 6× less carbon for 16h 18m more travelling.

August from Southampton — 20 destinations on the frontier, 10 without flying.
Destination	How	CO₂e return	Temp	Sun/day	Rain/day	Journey
Exeter, United Kingdom	Rail	12.1 kg	16.8 °C	9.5 h	2.5 mm	4h 6m
Chelmsford, United Kingdom	Rail	12.8 kg	17.9 °C	10.4 h	1.6 mm	4h 12m
Dunkirk, France	Rail	14.3 kg	18.5 °C	11.3 h	2.5 mm	6h
Paris, France	Rail	19.1 kg	19.9 °C	10.3 h	4.1 mm	8h 12m
Orléans, France	Rail	21.5 kg	20.1 °C	10.4 h	2.1 mm	9h 24m
Mainz, Germany	Rail	27.1 kg	20.9 °C	10.6 h	2.2 mm	11h 54m
Chalon-sur-Saône, France	Rail	27.8 kg	21.9 °C	11.8 h	1.5 mm	12h 18m
Lyon, France	Rail	30.7 kg	23.3 °C	12.0 h	1.3 mm	13h 36m
Aix-les-Bains, France	Rail	32.1 kg	23.6 °C	11.5 h	1.7 mm	14h 12m
Valence, France	Rail	33.2 kg	24.5 °C	12.5 h	0.7 mm	14h 48m
Perpignan, France	Air	244 kg	25.9 °C	12.2 h	0.6 mm	4h 48m
Zaragoza, Spain	Air	259 kg	27.2 °C	12.7 h	0.7 mm	4h 54m
Madrid, Spain	Air	297 kg	28.2 °C	12.7 h	0.3 mm	5h 6m
Aranjuez, Spain	Air	307 kg	28.9 °C	12.8 h	0.4 mm	5h 6m
Andujar, Spain	Air	364 kg	31.1 °C	12.7 h	0.1 mm	5h 24m
Metlaoui, Tunisia	Air	505 kg	31.4 °C	12.6 h	0.1 mm	6h 12m
Tozeur, Tunisia	Air	513 kg	33.1 °C	12.4 h	0.0 mm	6h 12m
Arfoud, Morocco	Air	548 kg	34.3 °C	12.1 h	0.0 mm	6h 24m
Zagora, Morocco	Air	583 kg	35.9 °C	12.1 h	0.0 mm	6h 36m
Kom Ombo, Egypt	Air	971 kg	36.8 °C	11.9 h	0.0 mm	9h

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 (364 kg, 31.1 °C) to Metlaoui (505 kg, 31.4 °C) buys 0.3 °C more warmth for an extra 141 kg — 471 kg of CO₂e per degree. That single step is the most expensive warmth on the whole curve.

The pick of them

ExeterUnited Kingdom12.1 kg CO₂e return16.8 °C · 9.5 h sun · 4h 6m by railwarm overall ValenceFrance33.2 kg CO₂e return24.5 °C · 12.5 h sun · 14h 48m by railwarm, bright and dry Kom OmboEgypt971 kg CO₂e return36.8 °C · 11.9 h sun · 9h by airwarm, bright and dry

If you'd rather have sunshine than heat

August answers differently depending on what you're after. The sunniest destinations from Southampton in August are a different list — the brightest places are not always the hottest, and in winter the difference is large.

Where to stay in Kom Ombo

Places to stay in Kom Ombo, 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

August from elsewhere

Questions

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

Kom Ombo, Egypt, at 36.8 °C. Reaching it emits 971 kg CO₂e return, travelling 9h each way by air.

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

Yes. Valence reaches 24.5 °C and is reachable by rail or ferry in 14h 48m, emitting 33.2 kg CO₂e return — though Kom Ombo is warmer still, if you fly.

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

971 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.