Weather in Lisbon in May 2025
Average weather
Average temperature in Lisbon in May
Going from a maximum of +29°C during the day to a minimum of +13°C during the night, the temperature in May averages around +24°C.
The average maximum temperature goes down 31% by the end of the month, compared with the beginning of the month, from +28°C to +23°C.
Is Lisbon warm or cold in May?
Lisbon is typically mild in May.
Maximum temperatures go up compared to the previous month from +19°C to +21°C. The minimum temperature also goes up from +12°C to +14°C.
Pack a light jacket as it will be warm in the day and cool in the evenings.
Take a look at how May is compared to other months in Lisbon:
Water temperature in Lisbon in May
Water in Lisbon in May is Fresh. It varies from +15°C to +19°C, with an average of +17°C. This is almost similar to the air temperature, which averages +21°C.
In May, water temperatures are average relative to the rest of the year:
Can you swim in Lisbon in May?
Climate in Lisbon in May
| April | May | June | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +19°C | +21°C | +24°C | ||||
| Min. temperature | ||||||
| +6°C | +8°C | +12°C | ||||
| Max. temperature | ||||||
| +32°C | +34°C | +41°C | ||||
| Rainfall | ||||||
| 67 mm | 40 mm | 12 mm | ||||
| Wind | ||||||
| 4 m/s | 4 m/s | 4 m/s | ||||
| Avg. water temperature | ||||||
| +16°C | +17°C | +19°C | ||||
| Humidity | ||||||
| 71% | 69% | 68% | ||||
| Air pressure | ||||||
| 1015 HPa | 1015 HPa | 1016 HPa | ||||
| Sunny days | ||||||
| 11 | 14 | 16 | ||||
| Cloudy days | ||||||
| 7 | 8 | 9 | ||||
| Rainy days | ||||||
| 10 | 7 | 4 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
May weather is still as good as in April. It’s getting warmer as May arrives. The average maximum temperature goes up from +19°C to +21°C during the day. As May arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 67 mm to 40 mm. It feels drier, as humidity decreases from 71% to 69%. The average wind speed doesn’t change much during May, staying around 4 m/s. The good news is there are likely to be more sunny days in May, from 11 to 14.
But maybe it is worth considering traveling in June as the weather gets better.
Wind
The average wind speed is 6 m/s getting up to 13 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in Lisbon is gradually decreasing during May, going from 6 m/s to 4 m/s over the course of the month.
Rain
How was the weather last May in Lisbon?
Climate Change over Years
The climate in Lisbon in May has not changed much over the last 43 years.
The average temperature was the lowest in 1979 (+18°C) and the highest in 2017 (+22°C). The driest year was 1992 with only 298 mm of rainfall, and the wettest year was 2022 with 2338 mm.
FAQ
Is May a good time to visit Lisbon?
Can you sunbathe in Lisbon in May?
Can you swim in Lisbon in May?
Is Lisbon rainy in May?
Is it sunny in Lisbon in May?
Other cities in Portugal
Monthly weather in Lisbon
Source of the data
For this page, we’ve looked at the typical weather in Lisbon, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.