Portugal
Lisbon weather by month
Lisbon is warmest in August, with average highs of 28°C, and coolest in January at 14°C. The sea ranges from about 15°C to 18°C, warmest in October.
- WarmestAugust28°C average high
- CoolestJanuary14°C average high
- Warmest seaOctober18°C on average
- From Dublin≈ 2h 30mdirect, estimated
Lisbon through the year
Beach weather (highs of 25°C or more and fewer than seven rainy days) is most likely July to September. November is the wettest month, with rain on about 9 days.
Month by month
| Month | High | Low | Sea | Rainy days | Rain | Sky | Days 25°C+ |
|---|---|---|---|---|---|---|---|
| January | 14° | 9° | 16° | 7 | 64 mm | Often cloudy | 0% |
| February | 15° | 9° | 15° | 6 | 55 mm | Often cloudy | 0% |
| March | 17° | 10° | 15° | 8 | 70 mm | Often cloudy | 1% |
| April | 19° | 12° | 16° | 7 | 61 mm | Often cloudy | 8% |
| May | 22° | 14° | 16° | 3 | 40 mm | Some cloud | 29% |
| June | 25° | 16° | 18° | 2 | 13 mm | Some cloud | 41% |
| July | 27° | 18° | 17° | 0 | 3 mm | Mostly clear | 69% |
| August | 28° | 18° | 17° | 0 | 2 mm | Some cloud | 79% |
| September | 26° | 18° | 17° | 4 | 35 mm | Some cloud | 56% |
| October | 23° | 16° | 18° | 8 | 76 mm | Often cloudy | 26% |
| November | 18° | 12° | 18° | 9 | 95 mm | Often cloudy | 0% |
| December | 15° | 10° | 16° | 6 | 71 mm | Often cloudy | 0% |
Shaded rows: beach weather (July to September). Rainy day = 2 mm or more. Sky = average cloud cover. How we measure
Flying time
Estimated from the distance for a direct flight. Real schedules vary, and many long-haul trips need a connection.
- From Dublin≈ 2h 30m
- From Cork≈ 2h 15m
- From Belfast≈ 2h 45m
- From London≈ 2h 30m
- From Manchester≈ 2h 30m
- From Glasgow≈ 2h 45m
Air: ERA5 reanalysis via Open-Meteo, 2011–2025, for the grid point at 38.72, -9.14 (64 m). Sea: Copernicus Marine analysis via Open-Meteo, 2023–2025. Averages describe past weather, not a forecast.