Olhão Weather in September

Olhão in September sees high daytime temperatures of 25°C (77°F) and nighttime lows of 19°C (66°F). Low rainfall is typical, with around 21 mm (0.8 in) for the month.

Rainfall in Olhão in September

Rain is expected on roughly 3 days, totalling around 21 mm (0.8 in) for the month. Showers tend to be short but heavy rather than persistent drizzle. When it rains, it usually means it, but it doesn't last long.

Temperature in Olhão in September

Olhão in September is worth a visit. The temperature is excellent, with 25°C (77°F) during the day and 19°C (66°F) at night. September is a notable month of the summer season. Conditions stay fairly consistent through the month, making it easier to plan what to wear. At 19°C (66°F) overnight, it can feel quite a bit cooler after dark. Worth packing something warmer for evenings, but the cooler temperatures are ideal for sleeping.

Sunshine in Olhão in September

The month enjoys around 278 hours of sunshine, creating mostly sunny days with good weather conditions.

Wind Speed in Olhão in September

Average wind speeds reach 3 m/s (6 knots) in September, creating light breezes that feel pleasant throughout the day. Some days are calmer, while others bring slightly more active breezes.

Average water temperature in September

With water at 20°C (68°F), conditions are good for swimming and other water activities. You won't need a wetsuit and most people find it very comfortable.

If your ideal day consists of dry skies and pleasant temperatures, May, June, July, August, September and October typically offer the best circumstances for Olhão.

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• May
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For a detailed overview over the year and the best time to visit Portugal, check out our Olhão's climate page.

Olhão Temperature in September

Min Temperature 19°C (66°F)  

Max Temperature 25°C (77°F)  

Water Temperature 20°C (68°F) *  

Chance of Rain 8%  

Precipitation 21 mm (0.8 in)  

Rainy days 3 days  

Humidity 65% *  

Windspeed 3 m/s (6 knots) *  

Sunshine 278 hours *  

Percentage Sunshine 76% *  

* Data from: Faro, Portugal (6 KM, 4 Miles).

Daily Historical Temperatures

49-year average (1976-2025)

Based on our historical records, temperatures in Olhão typically stay consistent throughout September, with daily highs averaging around 25°C (77°F). Nights are pleasant, with lows typically ranging from 17°C (63°F) to 20°C (68°F).

Average temperatures in September

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Daily Historical Precipitation

49-year average (1976-2025)

Average daily rainfall for each day of the month based on long-term records.

Average precipitation in September

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Historical weather for Olhão in September

Browse day-by-day weather records for Olhão spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.

Historical weather Temperatures Precipitation

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‹ January February March April May June July August September October November December ›

Olhão historical weather extremes in September

The extremes listed below come from historical weather data collected in Olhão from 1998 through 2025.

• The hottest September day on record in Olhão reached 35°C (95°F) (September 13, 2025).
• The lowest daytime temperature in September was 20°C (68°F), recorded on September 25, 2002.
• The lowest overnight temperature recorded in September was 13°C (55°F) (September 28, 2012).

What to Wear in Olhão in September

Pleasant temperatures in September mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Pack a light rain jacket or compact umbrella for occasional showers. Expect water temperatures of around 20°C (68°F), which is ideal for taking a refreshing dip. Bring swimwear and consider packing a towel for drying off. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.

What To Do in Olhão in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

10/10

Cycling

10/10

Walking

10/10

Barbeque

9/10

Camping

10/10

Outdoor sports

10/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Portugal, check out our Olhão's climate page.

More climate data for Olhão

Temperature Rainfall Sunshine Humidity Wind Speed Water Temp

See the full Olhão climate overview or explore weather in Portugal.