Cardiff · April · warmth

Warmest places to go from Cardiff in April

The warmest place you can reach from Cardiff in April within 15 hours is Kom Ombo at 28.3 °C, costing 1,004 kg CO₂e return. The lowest-carbon option is Portsmouth at 13.2 kg — 76× less carbon for 18.8 °C less.

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

By rail or ferry By air

Carbon against warmth, April, departing Cardiff. Journeys of up to 15 hours each way.

What the 15-hour limit costs: at this budget Alzira can only be reached by air — 349 kg CO₂e, in 5h 18m. Allow up to 24 hours and the train does the same journey for 57.5 kg in 23h 42m — 6× less carbon for 18h 24m more travelling.

April from Cardiff — 17 destinations on the frontier, 5 without flying.
Destination	How	CO₂e return	Temp	Sun/day	Rain/day	Journey
Portsmouth, United Kingdom	Rail	13.2 kg	9.5 °C	8.5 h	2.6 mm	4h 12m
Falmouth, United Kingdom	Rail	16.0 kg	9.9 °C	7.9 h	3.6 mm	4h 42m
Angers, France	Rail	30.3 kg	11.1 °C	8.8 h	2.2 mm	11h
La Rochelle, France	Rail	34.7 kg	12.1 °C	9.8 h	2.6 mm	13h 6m
Bordeaux, France	Rail	38.9 kg	12.9 °C	9.6 h	2.2 mm	15h
A Coruña, Spain	Air	247 kg	13.9 °C	10.2 h	3.4 mm	4h 48m
Perpignan, France	Air	271 kg	15.2 °C	10.4 h	1.3 mm	4h 54m
Zaragoza, Spain	Air	278 kg	16.1 °C	11.3 h	0.6 mm	5h
Alzira, Spain	Air	349 kg	18.2 °C	11.5 h	0.1 mm	5h 18m
Andujar, Spain	Air	376 kg	18.7 °C	11.9 h	0.4 mm	5h 30m
Seville, Spain	Air	398 kg	19.8 °C	11.8 h	0.2 mm	5h 36m
Al Fqih Ben Calah, Morocco	Air	536 kg	21.9 °C	11.5 h	0.5 mm	6h 18m
Arfoud, Morocco	Air	561 kg	22.8 °C	11.7 h	0.1 mm	6h 30m
Zagora, Morocco	Air	594 kg	24.7 °C	12.1 h	0.0 mm	6h 36m
Sohag, Egypt	Air	943 kg	26.3 °C	11.7 h	0.0 mm	8h 54m
Luxor, Egypt	Air	974 kg	27.4 °C	11.8 h	0.0 mm	9h
Kom Ombo, Egypt	Air	1,004 kg	28.3 °C	11.8 h	0.0 mm	9h 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 Zagora (594 kg, 24.7 °C) to Sohag (943 kg, 26.3 °C) buys 1.6 °C more warmth for an extra 349 kg — 218 kg of CO₂e per degree. That single step is the most expensive warmth on the whole curve.

The pick of them

PortsmouthUnited Kingdom13.2 kg CO₂e return9.5 °C · 8.5 h sun · 4h 12m by railcold but bright BordeauxFrance38.9 kg CO₂e return12.9 °C · 9.6 h sun · 15h by railmild and bright Kom OmboEgypt1,004 kg CO₂e return28.3 °C · 11.8 h sun · 9h 12m by airwarm, bright and dry

If you'd rather have sunshine than heat

April answers differently depending on what you're after. The sunniest destinations from Cardiff in April 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 Cardiff

April from elsewhere

Questions

Where is the warmest place to go from Cardiff in April?

Kom Ombo, Egypt, at 28.3 °C. Reaching it emits 1,004 kg CO₂e return, travelling 9h 12m each way by air.

Can I get somewhere warm from Cardiff in April without flying?

Yes. Bordeaux reaches 12.9 °C and is reachable by rail or ferry in 15h, emitting 38.9 kg CO₂e return — though Kom Ombo is warmer still, if you fly.

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

1,004 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.