Lisbon weather in April
In April, Lisbon has daytime highs averaging 18 °C, nights around 12 °C, with 8.1 wet days, and a sea temperature of 15 °C. Figures are 1991–2020 climate normals.
- 18.1°C Average high
- 12.2°C Average low
- 8.1days Wet days
- 53mm Rainfall
- 15.4°C Sea temperature
- 13h Daylight
Daily temperatures through April
How April develops
Averages for the first, middle and last part of the month, from daily 1991–2020 normals. Chance of rain is the share of years in which that calendar day recorded more than 1 mm.
| Days | Avg high | Avg low | Chance of rain |
|---|---|---|---|
| 1–10 April | 17.7 °C | 11.8 °C | 30 % |
| 11–20 April | 18.0 °C | 12.1 °C | 26 % |
| 21–30 April | 18.6 °C | 12.8 °C | 26 % |
What to expect
| Measure | Typical April | Share of the month |
|---|---|---|
| Days above 25 °C | 0.7 of 30 | 2 % |
| Days above 30 °C | 0 of 30 | 0 % |
| Days below 0 °C | 0 of 30 | 0 % |
| Days with more than 1 mm rain | 8.1 of 30 | 27 % |
Conditions in April
| Measure | Average |
|---|---|
| Mean temperature | 15 °C |
| Record high (1991–2020) | 28 °C |
| Record low (1991–2020) | 7.2 °C |
| Relative humidity | 75 % |
| Wind speed | 23 km/h |
| Cloud cover | 49 % |
Where Lisbon ranks in April
| Ranking | Position | Value |
|---|---|---|
| Best beach destinations in Europe in April | 21st of 50 | 34/100 |
| Warmest sea temperatures in Europe in April | 25th of 50 | 15 °C |
| Places with the best weather in Europe in April | 28th of 50 | 81/100 |
| The warmest places in Europe in April | 30th of 50 | 18 °C |
April compared with the months around it
| Month | Avg high | Rainfall | Cloud |
|---|---|---|---|
| February | 14.4 °C | 52 mm | 50 % |
| March | 16.7 °C | 53 mm | 50 % |
| April | 18.1 °C | 53 mm | 49 % |
| May | 20.8 °C | 44 mm | 44 % |
| June | 23.9 °C | 11 mm | 34 % |
See all twelve months for Lisbon
- April is the 7th warmest month here.
- It is the 7th driest month of the year.
- It ranks 6th for least cloud cover.
- Days last about 13 hours from sunrise to sunset.
- It rains on 8.1 of 30 days — 27 % of the month.
- Nights are about 5.9 °C cooler than the middle of the day.
- The hottest April day on record since 1991 reached 28 °C, 9.7 °C above the usual daytime high.
- Beach score: 34 / 100 — see how this is calculated.
QuestionsApril in Lisbon, answered
How warm is Lisbon in April?
Daily highs average 18 °C and nights fall to about 12 °C, a spread of 5.9 °C between afternoon and dawn. That makes April the 7th warmest month of the year here.
Does it rain much in Lisbon in April?
April averages 53 mm of rain, spread over about 8 of the 30 days — 27 % of the month. Cloud cover averages 49 % of the sky.
Is the sea warm enough to swim in April?
The sea averages 15 °C off Lisbon in April. Most people find water below 20 °C bracing and above 25 °C comfortable for a long swim; this figure is a monthly surface average, so a sheltered bay on a still afternoon can be warmer.
How long are the days in April?
Lisbon averages 13 hours between sunrise and sunset in April. Day length is computed from latitude and date, so it is exact rather than modelled — but it says nothing about how much of that time is sunny.
Data sources and method
- ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
- Open-Meteo — Open-Meteo.com. CC BY 4.0
- NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
- GeoNames — GeoNames.org. CC BY 4.0
- Normal period
- 1991–2020
- Dataset version
- era5-1991-2020-scores1.1
- Last processed
Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: daylight hours, beach and comfort scores, monthly rankings, threshold day counts, chance of a wet day by date, ten-day averages within the month. Full formulas are on the methodology page.
Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.