Lisbon weather

Our guide to the weather in Lisbon during August

28

Average high

6

UV Index

7mm

Monthly rainfall

18

Sea temperature

Lisbon is a vibrant, picturesque city with a rich cultural heritage, making it an ideal destination for American tourists, particularly during the summer months when temperatures are mild and outdoor activities are plentiful. 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 August.

How warm is it in Lisbon during August?

August is typically the hottest month in Lisbon. The temperature hits about 28℃ during the day, falling away to a balmy 18℃ at night.The UV index will be high at this time of year, so protection against skin and eye damage is needed. Try to limit exposure between 10am and 4pm. Apply broad spectrum SPF 30+ sunscreen every few hours, even if it's cloudy, or more frequently after sweating or swimming, and wear UV-blocking sunglasses too, and bear in mind that bright surfaces, such as sand and water increase UV exposure.

Does it rain in Lisbon during August?

The answer is no. Lisbon is typically bone dry in August. You're not likely to see a thunderstorm during your trip.

Is it windy in Lisbon during August?

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

How warm is the sea in Lisbon during August?

The water around Lisbon is around 18℃ during August. 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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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