Barcelona · September · sunshine

Sunniest places to go from Barcelona in September

The sunniest place you can reach from Barcelona in September within 15 hours is Fethiye at 11.8 h, costing 598 kg CO₂e return. The lowest-carbon option is Tortosa at 4.5 kg — 133× 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 Barcelona. Pick one to compare.

By rail or ferry By air

Carbon against sunshine, September, departing Barcelona. Journeys of up to 15 hours each way.

September from Barcelona — 4 destinations on the frontier, 3 without flying.
Destination	How	CO₂e return	Temp	Sun/day	Rain/day	Journey
Tortosa, Spain	Rail	4.5 kg	22.3 °C	10.3 h	2.5 mm	4h 6m
Aix-en-Provence, France	Rail	10.6 kg	19.3 °C	10.8 h	2.1 mm	6h 54m
Granada, Spain	Rail	20.1 kg	21.6 °C	11.5 h	0.9 mm	11h 18m
Fethiye, Turkey	Air	598 kg	26.0 °C	11.8 h	1.6 mm	6h 42m

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 (20.1 kg, 11.5 h) to Fethiye (598 kg, 11.8 h) buys 0.3 hours more sunshine for an extra 578 kg — 1927 kg of CO₂e per hour. That single step is the most expensive sunshine on the whole curve.

The pick of them

TortosaSpain4.5 kg CO₂e return22.3 °C · 10.3 h sun · 4h 6m by railwarm overall GranadaSpain20.1 kg CO₂e return21.6 °C · 11.5 h sun · 11h 18m by railwarm, bright and dry FethiyeTurkey598 kg CO₂e return26.0 °C · 11.8 h sun · 6h 42m by airwarm overall

If you'd rather have heat than sunshine

September answers differently depending on what you're after. The warmest destinations from Barcelona 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 Fethiye

Places to stay in Fethiye, Turkey, 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 Barcelona

September from elsewhere

Questions

Where is the sunniest place to go from Barcelona in September?

Fethiye, Turkey, at 11.8 h. Reaching it emits 598 kg CO₂e return, travelling 6h 42m each way by air.

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

Yes. Granada reaches 11.5 h and is reachable by rail or ferry in 11h 18m, emitting 20.1 kg CO₂e return — though Fethiye is sunnier still, if you fly.

How much carbon does a return trip from Barcelona to Fethiye produce?

598 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.