Lagos, Algarve weather in September
Temperature, sea and sunshine in September: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in September
Good
Best time to visit: July – September
What is the weather like in Lagos, Algarve in September?
In September, Lagos, Algarve is warm: daytime highs average 24 °C, and nights cool down to about 18 °C. The sea averages 19.9 °C – bracing, so a wetsuit helps for longer swims. With around 9 hours of sunshine a day, there is plenty of sun. Rain is rare: about 3 days bring 21 mm in total. All in all, September is a good month for a holiday in Lagos, Algarve.
September compared
How the weather changes from August to October. Tap a month to open it.
| AugustAug | SeptemberSep | OctoberOct | |
|---|---|---|---|
| Score | 85 | 79 | 56 |
| Day | 25° | 24° | 22° |
| Night | 19° | 18° | 17° |
| Sea | 20° | 20° | 20° |
| Sun | 11 h | 9 h | 8 h |
| Rain days | 0 | 3 | 8 |
More details for September
- Daylight
- 12 h 29 min07:16 – 19:44
- UV index
- 7 · highclear sky, noon (estimate)All months
- Muggy days
- 5 daysdew point 18 °C or more
- Wind
- 20 km/haverage daily peak
- Cloud cover
- 34 %on average
- Hot days
- 0 days30 °C or more
- Time zone
- UTC+1Europe/Lisbon
How the score comes together
- Temperatureweight 35 %82 %
- Seaweight 25 %41 %
- Sunshineweight 20 %100 %
- Few rainy daysweight 20 %100 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in September
- Wetsuit for longer swims
- Sunscreen
- Sunglasses & sun hat
Lagos, Algarve in September: quick answers
Is Lagos, Algarve hot in September?
Warm rather than hot: in September, daytime highs in Lagos, Algarve average 24 °C and nights cool to about 18 °C.
Can you swim in Lagos, Algarve in September?
Only if you don't mind cold water: in September the sea averages just 19.9 °C. Comfortable swimming temperatures are not reached at any time of year.
Does it rain much in Lagos, Algarve in September?
Rain is rare: about 3 days bring 21 mm in total.
Lagos, Algarve month by month
The whole year in Lagos, AlgarveAll destinations: PortugalAlgarve weather in SeptemberWhere to go in SeptemberSea temperature in September
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0)