Lisbon weather in April
Lisbon averages 20°C by day and 12°C at night in April, with the sea at 17°C and 10 days with at least 1 mm of rain. It warms up by about 3°C into May.
Day
20°C
Night
12°C
Sea
17°C
Rainy days
10
Flight from London
2½h
What April feels like
April is mild in Lisbon: good for exploring, not reliably beach weather.
The sea is 17°C: cold for swimming, so plan on a heated pool.
Expect some rain: about 10 days with at least 1 mm.
Of the 48 sun destinations we track, Lisbon is the #45 warmest in April, and #20 of 23 within 5½ hours of the UK.
Want it warmer in April?
These are hotter than Lisbon this month for at most an hour and a half more flying:
Lisbon weather by month
April is highlighted. Compare with March and May, or see the full year in Lisbon.
Lisbon in April: quick answers
Is Lisbon hot in April?
April is mild in Lisbon: good for exploring, not reliably beach weather. Average highs are 20°C and lows 12°C.
Can you swim in Lisbon in April?
The sea is 17°C: cold for swimming, so plan on a heated pool.
Does it rain in Lisbon in April?
Expect some rain: about 10 days with at least 1 mm.
What is the warmest month in Lisbon?
August, at an average high of 29°C. The coolest is January at 15°C.
How long is the flight to Lisbon from the UK?
About 2½h direct from London, estimated from the 1,571 km distance. Check your airline for exact times.
Still choosing? See where is hot in April for every destination ranked by temperature, sea and flight time.
How we measured this
Averages of every day in April 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 Lisbon in April?
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