Olhão 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
Excellent
Best time to visit: June – September
What is the weather like in Olhão in September?
In September, Olhão is warm: daytime highs average 24 °C, and nights cool down to about 19 °C. The sea averages 21.3 °C – refreshing for a swim. With around 9 hours of sunshine a day, there is plenty of sun. Rain is rare: about 3 days bring 24 mm in total. All in all, September is an excellent month for a holiday in Olhão.
September compared
How the weather changes from August to October. Tap a month to open it.
| AugustAug | SeptemberSep | OctoberOct | |
|---|---|---|---|
| Score | 91 | 87 | 62 |
| Day | 27° | 24° | 22° |
| Night | 21° | 19° | 18° |
| Sea | 22° | 21° | 21° |
| Sun | 12 h | 9 h | 8 h |
| Rain days | 0 | 3 | 6 |
More details for September
- Daylight
- 12 h 29 min07:12 – 19:41
- UV index
- 7 · highclear sky, noon (estimate)All months
- Muggy days
- 7 daysdew point 18 °C or moreAll months
- Wind
- 17 km/haverage daily peakAll months
- Cloud cover
- 32 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Time zone
- UTC+1Europe/Lisbon
How the score comes together
- Temperatureweight 35 %90 %
- Seaweight 25 %61 %
- 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
- Swimwear
- Sunscreen
- Sunglasses & sun hat
Olhão in September: quick answers
Is Olhão hot in September?
Warm rather than hot: in September, daytime highs in Olhão average 24 °C and nights cool to about 19 °C.
Can you swim in Olhão in September?
Yes. In September the sea averages 21.3 °C – refreshing for a swim.
Does it rain much in Olhão in September?
Rain is rare: about 3 days bring 24 mm in total.
Olhão month by month
The whole year in OlhãoAll 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). Sources & licences