Lisbon works all year, but each season gives a different weekend. Summer is hot and busy with boat parties and festivals; spring and autumn are warm and calmer; winter is mild and quieter. Here is how to choose.
Lisbon weather at a glance
29 °C
average high in August
28 °C
average high in July
~2,800 h
of sunshine a year
Apr–Oct
boat party season
12–13 Jun
Santo António night
Season by season
🌸 Spring
Warm days, fewer crowds and the start of the boat party season in April.
☀️ Summer
Hot and busy: boat parties, beaches, Santo António in June and NOS Alive in July.
🍂 Autumn
Still warm in September and October, with boats running until October.
🌧️ Winter
Mild and quieter – karting, paintball, golf, spa and the nightlife all still work.
🎆 New Year
A free party on Praça do Comércio.
Big events
June
Festas de Lisboa
Santo António night on 12–13 June brings parades and grilled sardines to the old quarters.
June
Rock in Rio Lisboa
The 2026 edition ran on 20, 21, 27 and 28 June at Parque Tejo.
July
NOS Alive
The 2026 festival ran on 9–11 July in Algés.
Popular by season
FAQ
When is the best time for a Lisbon stag do?
May, June and September for warm weather and boat parties with fewer crowds than July and August.
Can we do a boat party in winter?
Boat parties run from April to October. In winter we suggest a party bus, a beer dinner or a VIP club night instead.
Is Lisbon busy in summer?
Yes – book flights, accommodation and activities early.
Is winter a good time?
Yes for a city weekend: it is mild, quieter and many activities run all year.
