Month guide · São Bartolomeu de Messines, Portugal

São Bartolomeu de Messines in August: weather and what to expect

In August, São Bartolomeu de Messines averages highs of 32°C and lows of 19°C, with about 1 rainy day and 4 mm of rain. Highs are about the same as in July and 4°C warmer than in September. Crowds in the Algarve are at their peak.

Based on 1991-2020 climate data · Updated 1 November 2026 · Sources

Average high Town-level32°CLow 19°C
Rainy days Town-level14 mm in total
UV index Modelled9Very high at noon on a clear day
Crowds RegionalPeakThe Algarve as a whole

Is August a good time to visit?

Good for

No verdicts for São Bartolomeu de Messines in August yet. They only use climate values that are precise enough to judge with.

Not ideal for

  • Outdoor activity at midday
    Average highs of 32°C

Daily highs through August

Town-level · ERA5-Land 1991-2020
Usual range (8 in 10 years)Typical high

Highs fall about 2°C over the month. Nights below 15°C in about 1 in 3.

August in detail

Town-level · ERA5-Land
MeasureJulyAugustSeptember
Average high32°C32°C29°C
Average low18°C19°C17°C
Rainy days (at least 1 mm)114
Total rainfall2 mm4 mm27 mm
Daylight (mid-month)14 h 30 min13 h 38 min12 h 29 min

Crowds, holidays and daylight

Visitor level RegionalPeakNights booked through online platforms in the Algarve in August 2025: the busiest month of the year.

Public holidays in August 2027

  • 15 Aug Assumption Day

Local (municipal) holidays are not included.

Daylight mid-month Exact13 h 38 minSunrise to sunset, calculated from the town's coordinates.
PlaceHighRain daysFrom São Bartolomeu de Messines
Mértola, Alentejo34°C170 km
Altura, Algarve33°C170 km
Monte Gordo, Algarve33°C174 km
Manta Rota, Algarve32°C169 km
Vila Nova de Cacela, Algarve32°C167 km

The nearest towns with a warmer August. Distances are in a straight line.

How August is changing

Town-level · ERA5-Land

August highs are 2.5°C warmer than in 1991-2000 (2016-2025 against 1991-2000). Days above 35°C in August went from 4.8 to 10 a year on average.

Questions about São Bartolomeu de Messines in August

Is August a good time to visit São Bartolomeu de Messines?

It is less suited to outdoor activity at midday (average highs of 32°C).

How warm is São Bartolomeu de Messines in August?

Average highs are 32°C and lows 19°C. July averages 32°C and September 29°C.

Does it rain much in São Bartolomeu de Messines in August?

About 1 day has at least 1 mm of rain, with 4 mm in total over the month.

Is São Bartolomeu de Messines busy in August?

In August 2025, nights booked through online platforms in the Algarve were the busiest month of the year, which we count as peak. The figure is for the whole region and leaves out hotels.

How long are the days in São Bartolomeu de Messines in August?

About 13 h 38 min from sunrise to sunset in the middle of the month.

Sources

Climate: ERA5-Land, Copernicus Climate Change Service (C3S) Climate Data Store, contains modified Copernicus information (CC BY 4.0). Crowds: Eurostat, nights spent in short-stay accommodation booked through online platforms (tour_ce_omn12) (CC BY 4.0). Place names and populations: GeoNames (CC BY 4.0). Climate averages cover 1991-2020. Daylight: calculated from the town's coordinates. Full methodology