Sunniest places to go from Southampton in August
The sunniest place you can reach from Southampton in August within 15 hours is Guarda at 13.0 h, costing 312 kg CO₂e return. The lowest-carbon option is Exeter at 12.1 kg — 26× less carbon for 3.5 h less.
Every destination here is on the efficiency frontier: nowhere else in Europe is both sunnier in August and lower in carbon. Anything a better option beats outright has been left out.
By rail or ferry By air
What the 15-hour limit costs: at this budget Guarda can only be reached by air — 312 kg CO₂e, in 5h 12m. Allow up to 24 hours and the train does the same journey for 48.4 kg in 21h 48m — 6× less carbon for 16h 36m more travelling.
| Destination | How | CO₂e return | Temp | Sun/day | Rain/day | Journey |
|---|---|---|---|---|---|---|
| Exeter, United Kingdom | Rail | 12.1 kg | 16.8 °C | 9.5 h | 2.5 mm | 4h 6m |
| Chelmsford, United Kingdom | Rail | 12.8 kg | 17.9 °C | 10.4 h | 1.6 mm | 4h 12m |
| Dunkirk, France | Rail | 14.3 kg | 18.5 °C | 11.3 h | 2.5 mm | 6h |
| Margate, United Kingdom | Rail | 16.2 kg | 18.4 °C | 11.4 h | 2.4 mm | 4h 48m |
| La Rochelle, France | Rail | 26.6 kg | 20.5 °C | 12.0 h | 1.9 mm | 11h 42m |
| Valence, France | Rail | 33.2 kg | 24.5 °C | 12.5 h | 0.7 mm | 14h 48m |
| Guarda, Portugal | Air | 312 kg | 21.6 °C | 13.0 h | 0.0 mm | 5h 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 Valence (33.2 kg, 12.5 h) to Guarda (312 kg, 13.0 h) buys 0.5 hours more sunshine for an extra 278 kg — 557 kg of CO₂e per hour. That single step is the most expensive sunshine on the whole curve.
The pick of them
If you'd rather have heat than sunshine
August answers differently depending on what you're after. The warmest destinations from Southampton in August are a different list — hours of sunshine and degrees of warmth come apart, especially early and late in the year.
Where to stay in Guarda
Places to stay in Guarda, Portugal, 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
August from elsewhere
- Amsterdam
- Barcelona
- Berlin
- Birmingham
- Bristol
- Brussels
- Cardiff
- Copenhagen
- Dublin
- Edinburgh
- Frankfurt
- Glasgow
- Leeds
- Lisbon
- Liverpool
- London
- Madrid
- Manchester
- Milan
- Munich
- Newcastle
- Nottingham
- Oslo
- Paris
- Prague
- Rome
- Sheffield
- Southampton
- Stockholm
- Vienna
- Warsaw
- Zurich
Questions
Where is the sunniest place to go from Southampton in August?
Guarda, Portugal, at 13.0 h. Reaching it emits 312 kg CO₂e return, travelling 5h 12m each way by air.
Can I get somewhere sunny from Southampton in August without flying?
Yes. Valence reaches 12.5 h and is reachable by rail or ferry in 14h 48m, emitting 33.2 kg CO₂e return — though Guarda is sunnier still, if you fly.
How much carbon does a return trip from Southampton to Guarda produce?
312 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.