Portugal
Algarve in September: weather, sea & travel advice
This month's data profile
Strong month under the current formula
Algarve in September is climatically well suited to city breaks, family holidays, beach holidays and active holidays and hiking. The average daily high is around 25 °C, and the sea is about 21 °C. With about 3 rainy days it is dry.
Historical monthly averages, not a weather forecast. Individual days and years can differ substantially.
Rank among 12 monthly averages
90/100 · #1
Warmth
#3
Dryness
#4
Sun
#6
Sea warmth
#2
Published best categories: Overall, Beach, City break, Active, Family
Algarve · SeptemberPhoto: Eurico Craveiro · CC BY-SA 4.0Climate facts
- Average high
- 25 °C
- Average low
- 19 °C
- Sea
- 21 °C
- Rainy days (est.)
- 3 rainy days (est.)
- Sun (est.)
- 7 h/day
- Humidity
- 71 %
Climate evidence with direct month comparison
The highlighted row is the selected month. Precipitation total and rainy days are separate monthly averages.
| Month | Avg high °C | Avg low °C | Rainy days (est.) | Precipitation mm | Sun h/day (est.) | Humidity % | Wind m/s | Sea °C | Score |
|---|---|---|---|---|---|---|---|---|---|
| August | 28 | 20 | 1 | 3 | 8.8 | 64 | 3.6 | 21 | 88 |
| September (selected) | 25 | 19 | 3 | 23 | 6.9 | 71 | 3.5 | 21 | 90 |
| October | 23 | 17 | 8 | 73 | 4.9 | 77 | 3.8 | 21 | 80 |
How do the previous and next months compare?
Baseline: September (90/100)
Positive and negative values show the change from the selected month.
| Score Δ | Average high Δ | Average low Δ | Rainy days Δ | Rain Δ | Sun Δ | Humidity Δ | Wind Δ | Sea Δ | |
|---|---|---|---|---|---|---|---|---|---|
| August | -2 | +2.6 °C | +1 °C | -2.5 | -19.8 mm | +1.9 h | -6.7 % | +0.1 m/s | +0.2 °C |
| October | -10 | -2.9 °C | -1.7 °C | +4.9 | +50.3 mm | -2 h | +5.6 % | +0.3 m/s | -0.7 °C |
All twelve months in context
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Frequently asked questions
How warm is Algarve in September?
The average daily high is around 25 °C, with an average daily low of about 19 °C.
Can you swim in Algarve in September?
The sea is about 21 °C (swimmable).
Does it rain a lot in Algarve in September?
The curated estimate is about 3 rainy days per month, not a directly measured long-term average. Total precipitation averages around 23 mm for the month. A rainy day does not mean all-day rain.
When is the best time to visit Algarve?
By the climate score, June, July, August and September are the strongest months for Algarve. For a beach trip: June, July, August and September. September is one of them.