Southampton · July · warmth

Warmest places to go from Southampton in July

The warmest place you can reach from Southampton in July within 15 hours is Zagora at 36.6 °C, costing 583 kg CO₂e return. The lowest-carbon option is Exeter at 12.1 kg — 48× less carbon for 20.4 °C less.

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

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 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.

July from Southampton — 20 destinations on the frontier, 9 without flying.
Destination	How	CO₂e return	Temp	Sun/day	Rain/day	Journey
Exeter, United Kingdom	Rail	12.1 kg	16.2 °C	10.1 h	3.1 mm	4h 6m
Chelmsford, United Kingdom	Rail	12.8 kg	17.2 °C	10.7 h	3.1 mm	4h 12m
Dunkirk, France	Rail	14.3 kg	17.9 °C	11.2 h	2.7 mm	6h
Amiens, France	Rail	16.3 kg	18.7 °C	10.8 h	2.4 mm	6h 54m
Paris, France	Rail	19.1 kg	20.0 °C	11.2 h	2.6 mm	8h 12m
Bourges, France	Rail	24.4 kg	20.3 °C	11.4 h	2.7 mm	10h 42m
Chalon-sur-Saône, France	Rail	27.8 kg	21.2 °C	12.4 h	2.9 mm	12h 18m
Lyon, France	Rail	30.7 kg	22.5 °C	13.0 h	3.1 mm	13h 36m
Romans-sur-Isère, France	Rail	33.0 kg	23.5 °C	13.7 h	1.6 mm	14h 42m
Orange, France	Air	223 kg	25.3 °C	13.7 h	0.9 mm	4h 42m
Nîmes, France	Air	226 kg	25.5 °C	13.5 h	0.8 mm	4h 42m
Zaragoza, Spain	Air	259 kg	27.1 °C	13.7 h	0.2 mm	4h 54m
Madrid, Spain	Air	297 kg	28.1 °C	14.0 h	0.0 mm	5h 6m
Aranjuez, Spain	Air	307 kg	28.9 °C	14.0 h	0.0 mm	5h 6m
Andujar, Spain	Air	364 kg	30.9 °C	13.6 h	0.0 mm	5h 24m
Kairouan, Tunisia	Air	485 kg	32.8 °C	12.9 h	0.0 mm	6h 6m
Ar Rudayyif, Tunisia	Air	501 kg	33.3 °C	12.9 h	0.0 mm	6h 12m
Metlaoui, Tunisia	Air	505 kg	34.3 °C	12.9 h	0.0 mm	6h 12m
Tozeur, Tunisia	Air	513 kg	35.6 °C	13.0 h	0.0 mm	6h 12m
Zagora, Morocco	Air	583 kg	36.6 °C	12.1 h	0.0 mm	6h 36m

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 Romans-sur-Isère (33.0 kg, 23.5 °C) to Orange (223 kg, 25.3 °C) buys 1.8 °C more warmth for an extra 190 kg — 105 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 return16.2 °C · 10.1 h sun · 4h 6m by railwarm but wet Romans-sur-IsèreFrance33.0 kg CO₂e return23.5 °C · 13.7 h sun · 14h 42m by railwarm overall ZagoraMorocco583 kg CO₂e return36.6 °C · 12.1 h sun · 6h 36m by airwarm, bright and dry

If you'd rather have sunshine than heat

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

Where to stay in Zagora

Places to stay in Zagora, Morocco, 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

July from elsewhere

Questions

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

Zagora, Morocco, at 36.6 °C. Reaching it emits 583 kg CO₂e return, travelling 6h 36m each way by air.

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

Yes. Romans-sur-Isère reaches 23.5 °C and is reachable by rail or ferry in 14h 42m, emitting 33.0 kg CO₂e return — though Zagora is warmer still, if you fly.

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

583 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.