Lisbon weather

Our guide to the weather in Lisbon during May

22

Average high

5

UV Index

61mm

Monthly rainfall

17

Sea temperature

Lisbon is a vibrant city with a rich cultural heritage, offering plenty of sights and activities to explore in May. We've looked at the most up-to-date weather data for Lisbon, covering the last 12 years up to 2024, plus we've asked our team of travel bloggers for their first-hand experiences in order to answer the most frequently asked questions about Lisbon weather in May.

How warm is it in Lisbon during May?

The temperature reaches around 22℃ during the daytime in May, falling away to 14℃ at night. The UV index will be moderate at this time of year, so not something to worry about for the average person. However, if you're going to be outside for long periods it's worth wearing a broad spectrum SPF 30+ sunscreen and UV-blocking sunglasses. Remember that bright surfaces, such as water and sand increase UV exposure.

Does it rain in Lisbon during May?

On average, there will be 3 rainy days during the month, amounting to 60.8mm in total. That's broadly comparable with the amount of rain we see in England during the summer months, and would be considered dry. There's a small chance that you'll catch a thunderstorm during your trip.

Is it windy in Lisbon during May?

You're unlikely to experience any strong winds. Expect a gentle breeze that increases to moderate at times during May. With moderate humidity and mild air temperatures, the breeze will have a slight cooling effect.

How warm is the sea in Lisbon during May?

The water around Lisbon is around 17℃ during May. It will feel a little on the cool when first entering, but you'll warm up quickly. Most kids will have no problem with this temperature, but those who feel the cold are unlikely to want to swim.

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Lisbon Blog posts

From the Ireland's most popular travel bloggers

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Top 10 things to do in Lisbon - with or without kids

7th December 2021 by The Travel Expert

I recently returned from a fabulous weekend in Lisbon. I had visited briefly many years ago, but it wasn’t until I spent three full days exploring this vibrant city that I really appreciated its beauty. The fact that it is on the coast and has warm temperatures for most of the year certainly helps its appeal, but it was the colourful buildings in the old town, the stunning views of Alfama, and its terrific food scene that captivated me the most....

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Lisbon city guide

13th April 2018 by The Daily S'elf

If you’ve already read my Porto post, you might enjoy this Lisbon city guide. I wanted to go to Portugal badly, but couldn’t choose between the two cities, so I spent two nights in each, travelling by train from Porto to Lisbon. Here you’ll find information about Lisbon hotels, what to do, where to eat and drink and other useful information if you’re planning a short city break....

Weather in Lisbon

Our month-by-month guide to the weather and climate in Lisbon

14.7

Lisbon weather in

January
15.4

Lisbon weather in

February
17.1

Lisbon weather in

March
18.8

Lisbon weather in

April
22.2

Lisbon weather in

May
24.2

Lisbon weather in

June
26.5

Lisbon weather in

July
27.5

Lisbon weather in

August
26.0

Lisbon weather in

September
23.0

Lisbon weather in

October
17.9

Lisbon weather in

November
15.7

Lisbon weather in

December