Portugal
Lisbon in April: weather, sea & travel advice
This month's data profile
Clear transition month
Lisbon in April is climatically well suited to city breaks and active holidays and hiking. The average daily high is around 17 °C, and the sea is about 16 °C. With about 9 rainy days it is moderate.
Historical monthly averages, not a weather forecast. Individual days and years can differ substantially.
Rank among 12 monthly averages
58/100 · #7
Warmth
#8
Dryness
#7
Sun
#5
Sea warmth
#9
Published best categories: none
Lisbon · AprilPhoto: Dale Cruse - 10M views from San Francisco, CA, USA · CC BY 4.0Climate facts
- Average high
- 17 °C
- Average low
- 13 °C
- Sea
- 16 °C
- Rainy days (est.)
- 9 rainy days (est.)
- Sun (est.)
- 7 h/day
- Humidity
- 79 %
For your trip planning
April: slightly milder than March, wetter than May
In Lisbon, April sits just above March for average daily highs and lows, with slightly less precipitation and the same estimated rainy-day count. May is noticeably warmer and drier, with more estimated sunshine. April suits travellers who can live with some rain. Plan an indoor alternative for the wetter days.
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 |
|---|---|---|---|---|---|---|---|---|---|
| March | 16 | 12 | 9 | 57 | 5.6 | 80 | 4.7 | 15 | 53 |
| April (selected) | 17 | 13 | 9 | 52 | 7.3 | 79 | 4.7 | 16 | 58 |
| May | 19 | 15 | 7 | 37 | 8.6 | 79 | 4.6 | 16 | 69 |
How do the previous and next months compare?
Baseline: April (58/100)
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 | |
|---|---|---|---|---|---|---|---|---|---|
| March | -5 | -1.1 °C | -1.2 °C | ±0 | +4.1 mm | -1.7 h | +0.7 % | ±0 m/s | -0.8 °C |
| May | +11 | +1.9 °C | +1.6 °C | -2.6 | -15.1 mm | +1.3 h | -0.1 % | -0.1 m/s | +0.9 °C |
All twelve months in context
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Useful next decisions
Frequently asked questions
How warm is Lisbon in April?
The average daily high is around 17 °C, with an average daily low of about 13 °C.
Can you swim in Lisbon in April?
The sea is about 16 °C (cold).
Does it rain a lot in Lisbon in April?
The curated estimate is about 9 rainy days per month, not a directly measured long-term average. Total precipitation averages around 52 mm for the month. A rainy day does not mean all-day rain.
When is the best time to visit Lisbon?
By the climate score, June, July, August and September are the strongest months for Lisbon. For a beach trip: June, July, August and September. April is not among them.