Lisbon · September · sunshine

Sunniest places to go from Lisbon in September

The sunniest place you can reach from Lisbon in September within 15 hours is Alexandria at 11.9 h, costing 913 kg CO₂e return. The lowest-carbon option is Figueira da Foz Municipality at 4.7 kg — 194× less carbon for 1.5 h less.

Every destination here is on the efficiency frontier: nowhere else in Europe is both sunnier 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 sunshine, September, departing Lisbon. Journeys of up to 15 hours each way.

September from Lisbon — 4 destinations on the frontier, 3 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
Faro, Portugal	Rail	6.4 kg	22.1 °C	10.9 h	0.7 mm	5h
Granada, Spain	Rail	15.2 kg	21.6 °C	11.5 h	0.9 mm	9h
Alexandria, Egypt	Air	913 kg	27.4 °C	11.9 h	0.0 mm	8h 18m

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 Granada (15.2 kg, 11.5 h) to Alexandria (913 kg, 11.9 h) buys 0.4 hours more sunshine for an extra 897 kg — 2243 kg of CO₂e per hour. That single step is the most expensive sunshine 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 GranadaSpain15.2 kg CO₂e return21.6 °C · 11.5 h sun · 9h by railwarm, bright and dry AlexandriaEgypt913 kg CO₂e return27.4 °C · 11.9 h sun · 8h 18m by airwarm, bright and dry

If you'd rather have heat than sunshine

September answers differently depending on what you're after. The warmest destinations from Lisbon in September are a different list — hours of sunshine and degrees of warmth come apart, especially early and late in the year.

Where to stay in Alexandria

Places to stay in Alexandria, 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 sunniest place to go from Lisbon in September?

Alexandria, Egypt, at 11.9 h. Reaching it emits 913 kg CO₂e return, travelling 8h 18m each way by air.

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

Yes. Granada reaches 11.5 h and is reachable by rail or ferry in 9h, emitting 15.2 kg CO₂e return — though Alexandria is sunnier still, if you fly.

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

913 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.