Algarve weather in September
Algarve averages 28°C by day and 19°C at night in September, with the sea at 17°C and 3 days with at least 1 mm of rain. It cools by about 4°C into October.
Day
28°C
Night
19°C
Sea
17°C
Rainy days
3
Flight from London
2½h
What September feels like
September is hot in Algarve: proper beach weather.
The sea is 17°C: cold for swimming, so plan on a heated pool.
Rain is occasional, on about 3 days.
Of the 48 sun destinations we track, Algarve is the #30 warmest in September, and #12 of 23 within 5½ hours of the UK.
Want it warmer in September?
These are hotter than Algarve this month for at most an hour and a half more flying:
Algarve weather by month
September is highlighted. Compare with August and October, or see the full year in Algarve.
Algarve in September: quick answers
Is Algarve hot in September?
September is hot in Algarve: proper beach weather. Average highs are 28°C and lows 19°C.
Can you swim in Algarve in September?
The sea is 17°C: cold for swimming, so plan on a heated pool.
Does it rain in Algarve in September?
Rain is occasional, on about 3 days.
What is the warmest month in Algarve?
August, at an average high of 32°C. The coolest is January at 16°C.
How long is the flight to Algarve from the UK?
About 2½h direct from London, estimated from the 1,713 km distance. Check your airline for exact times.
Still choosing? See where is hot in September for every destination ranked by temperature, sea and flight time.
How we measured this
Averages of every day in September from 2016 to 2025, from the Open-Meteo historical weather archive (ECMWF ERA5 reanalysis). Sea temperature is the 2023 to 2025 average from the Open-Meteo marine archive. A rainy day has at least 1 mm of rain. Reanalysis describes an area about 25 km across, so sheltered resorts can run a degree or two warmer. Flight time is a distance-based estimate from London Heathrow.
Planning Algarve in September?
Save the restaurants, beaches and views you find on TikTok and Instagram for Algarve straight to a map, then let Dream Trip turn them into a day-by-day plan.
