☀️ Yes! Average temperature: 24°C
It's mild at 24°C — warm enough for sightseeing but you may want a light layer for evenings. Lisbon in September has an average air temperature of 24°C with sea temperatures around 20°C. You can expect 9 hours of sunshine per day and 20mm of rainfall, which means minimal rainfall — mostly dry and sunny.
The sea is 20°C — refreshing but swimmable, especially on sunny days. With 9 hours of daily sunshine, there's plenty of time to enjoy outdoor activities. Pack light layers, a jumper for evenings, comfortable walking shoes, and a rain jacket.
Lisbon offers mild weather in September — great for culture and sightseeing. The average flight time from the UK is comfortable and there are usually good deals available for this time of year.
Here's how Lisbon stacks up against similar destinations in September:
| Destination | Air °C | Sea °C | Rain | Sun |
|---|---|---|---|---|
| Lisbon | 24°C | 20°C | 20mm | 9h |
| Amalfi Coast | 24°C | 25°C | 50mm | 8h |
| Dubrovnik | 24°C | 24°C | 60mm | 8h |
| Hvar | 24°C | 24°C | 45mm | 8h |
| Madeira | 24°C | 24°C | 25mm | 7h |
| Mauritius | 24°C | 24°C | 30mm | 8h |
See how Lisbon's temperature changes throughout the year:
Looking for somewhere warm in September? These destinations are all 25°C+:
Yes, Lisbon in September has average temperatures of 24°C, making it a warm destination. Sea temperatures are 20°C.
The sea at 20°C is refreshing but swimmable.
Pack light layers, a jumper for evenings, comfortable walking shoes, and a rain jacket.
September is decent for visiting Lisbon — not too hot, good for sightseeing.
Compare temperatures, sea conditions & sunshine for 70+ destinations worldwide
Explore All Destinations →