Mallorca or Algarve in September?
On climate data, Mallorca comes out ahead overall in September. See the per-criterion details below.
MallorcaPhoto: Andrés Nieto Porras from Palma de Mallorca, España · CC BY-SA 2.0
AlgarvePhoto: Eurico Craveiro · CC BY-SA 4.0Key figures in September
| Criterion | Mallorca | Algarve |
|---|---|---|
| Day | 26 °C ★ | 25 °C |
| Night | 22 °C ★ | 19 °C |
| Sea | 25 °C ★ | 21 °C |
| Rainy days | 4 rainy days | 3 rainy days ★ |
| Sun | 6 h/day | 7 h/day ★ |
Winner by travel type
Trade-offs
- The sea at Mallorca is about 4 °C warmer.
Mallorca or Algarve in September: the short answer
In September, Mallorca comes out ahead on the overall climate score (Mallorca 93/100 vs Algarve 90/100). That is a snapshot of one month, though — which one truly fits depends on what you want from the trip, so the breakdown below goes criterion by criterion.
Across the whole year Mallorca averages a climate score of 72/100, Algarve 72/100. Both profiles below are historical monthly averages, not a forecast.
Weather in September, side by side
By day, Mallorca sits near 26 °C and Algarve near 25 °C — warmer in Mallorca. At night it is roughly 22 °C versus 19 °C.
On rain, Mallorca sees about 4 rainy days in September and Algarve about 3 — drier in Algarve. Algarve gets more sunshine (6 vs 7 hours a day).
Sea temperature and swimming
In September the water is about 25 °C at Mallorca and 21 °C at Algarve — warmer for swimming at Mallorca. Over the year, Mallorca is comfortable for swimming (from ~21 °C) in June, July, August, September and October, Algarve in July, August and September. Peak sea warmth is August for Mallorca and August for Algarve.
Rain and sun across the year
Over a full year Mallorca records roughly 60 rainy days and Algarve about 58 — the drier of the two overall is Algarve. At their sunniest, Mallorca reaches about 9 hours of sun a day (June) and Algarve about 10 (July). If dependable dry, sunny weather is your top priority, weigh these annual totals alongside the single month above.
Best time to visit each
Climatically, Mallorca is at its best in June, July, August and September, while Algarve peaks in June, July, August and September. If your dates are fixed, pick the destination whose strong season overlaps them; if you are flexible, plan around these windows.
Which suits which kind of trip
Based on the September scores for each travel style:
Beach & swimming: Mallorca scores higher in September.
City breaks: Algarve scores higher in September.
Active & hiking: Algarve scores higher in September.
Family: Mallorca scores higher in September.
Verdict: which should you pick?
There is no single winner — it depends on your month and your priority. For September specifically, use the head-to-head above; over the year, Mallorca carries the slightly higher overall climate score. Choose Mallorca if its strong months and profile match your plan, Algarve if its do. The month-by-month pages for each destination give you the full picture before you book.