Lisbon · September · warmth

Warmest places to go from Lisbon in September

The warmest place you can reach from Lisbon in September within 15 hours is Edfu at 34.0 °C, costing 986 kg CO₂e return. The lowest-carbon option is Figueira da Foz Municipality at 4.7 kg — 210× less carbon for 15.2 °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.

Where they are. Solid lines are rail or ferry, dashed are flights, from Lisbon. Pick one to compare.

By rail or ferry By air

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

September from Lisbon — 15 destinations on the frontier, 6 without flying.
Destination	How	CO₂e return	Temp	Sun/day	Rain/day	Journey
Figueira da Foz Municipality, Portugal	Rail	4.7 kg	18.8 °C	10.4 h	2.2 mm	4h 12m
Coimbra, Portugal	Rail	5.2 kg	19.6 °C	10.2 h	2.1 mm	4h 24m
Portimão, Portugal	Rail	5.4 kg	21.3 °C	10.8 h	0.6 mm	4h 30m
Badajoz, Spain	Rail	5.6 kg	22.2 °C	10.6 h	1.0 mm	4h 36m
Seville, Spain	Rail	9.3 kg	23.8 °C	10.9 h	1.1 mm	6h 18m
Almería, Spain	Rail	18.4 kg	24.9 °C	11.3 h	0.9 mm	10h 30m
Souq Sebt Oulad Nemma, Morocco	Air	188 kg	26.6 °C	10.8 h	0.1 mm	4h 30m
Arfoud, Morocco	Air	233 kg	27.1 °C	10.6 h	1.5 mm	4h 42m
Zagora, Morocco	Air	247 kg	28.5 °C	10.3 h	1.5 mm	4h 48m
Tozeur, Tunisia	Air	411 kg	29.4 °C	10.3 h	0.3 mm	5h 42m
Al Fayyum, Egypt	Air	889 kg	30.3 °C	11.7 h	0.0 mm	8h 36m
Assiut, Egypt	Air	922 kg	31.6 °C	11.7 h	0.0 mm	8h 48m
Sohag, Egypt	Air	941 kg	32.3 °C	11.7 h	0.0 mm	8h 54m
Luxor, Egypt	Air	971 kg	33.6 °C	11.6 h	0.0 mm	9h
Edfu, Egypt	Air	986 kg	34.0 °C	11.5 h	0.0 mm	9h 6m

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 (411 kg, 29.4 °C) to Al Fayyum (889 kg, 30.3 °C) buys 0.9 °C more warmth for an extra 478 kg — 531 kg of CO₂e per degree. That single step is the most expensive warmth on the whole curve.

The pick of them

Figueira da Foz MunicipalityPortugal4.7 kg CO₂e return18.8 °C · 10.4 h sun · 4h 12m by railwarm overall AlmeríaSpain18.4 kg CO₂e return24.9 °C · 11.3 h sun · 10h 30m by railwarm, bright and dry EdfuEgypt986 kg CO₂e return34.0 °C · 11.5 h sun · 9h 6m by airwarm, bright and dry

If you'd rather have sunshine than heat

September answers differently depending on what you're after. The sunniest destinations from Lisbon 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 Edfu

Places to stay in Edfu, 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 Lisbon

September from elsewhere

Questions

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

Edfu, Egypt, at 34.0 °C. Reaching it emits 986 kg CO₂e return, travelling 9h 6m each way by air.

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

Yes. Almería reaches 24.9 °C and is reachable by rail or ferry in 10h 30m, emitting 18.4 kg CO₂e return — though Edfu is warmer still, if you fly.

How much carbon does a return trip from Lisbon to Edfu produce?

986 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.