Your July weather guide
HotWeather in Lisbon in July
July is a good choice for Lisbon if you want warm, dry weather for a city break, but not if warm sea swimming is the priority. Average daytime highs reach 26°C, with nights around 18°C, so light clothing should cover much of your trip. The catch is the water: at about 19°C, it feels bracing rather than comfortably warm. Plan active days around the heat and leave room for shade at midday.
Long-term climate averages for Lisbon, not a forecast · 1991-2020
Lisbon, month by month
Your snapshot
At a glance
The useful details for Lisbon.
- Average daytime high
- 26.0°C
- 9 in 10 days stay below 31°C
- Average night-time low
- 18.1°C
- coldest 10% of nights: 16°C or lower
- Compared with London
- +4.2°C
- London averages 21.8°C in July
- Sea temperature
- 18.7°C
- year to year: 18°C to 21°C
- Sunshine per day (est.)
- 11.1h
- 77% of 14.5 h of daylight
- Rainy days (1 mm+)
- 1
- 2 mm over the month
- Humidity
- 70%
- Days over 25°C
- 56%
- 13% over 30°C
- Record high 1991-2020
- 37.9°C
- 1991-07-18
- Record low 1991-2020
- 14.8°C
- 2002-07-03
- Flight from London
- ≈ 2 h 42 min
- 1549 km, short-haul (estimate for a direct flight)
Records are observed extremes within 1991-2020, not typical holiday conditions. Warm-day percentages are shares of days, not day counts.
How July compares
July is the 2nd warmest month of the year in Lisbon and ranks 112th of 134 destinations we compare for July - see where else is hot in July. Within Portugal it is 10th of 13 (Portugal in July). Against London's average high of 21.8°C in July, Lisbon is 4.2°C warmer by day and 4.6°C warmer at night.
Daytime and night-time in July
The typical July day in Lisbon peaks at 26.0°C, but that is an average: the warmest 10% of days reach 30.7°C or more. About 56% of days top 25°C and 1 in 7 pass 30°C. Nights average 18.1°C; one night in ten drops to 16.4°C or lower, so pack a layer for evenings. Between 1991 and 2020 the hottest July day here reached 37.9°C (1991-07-18) and the coldest night 14.8°C (2002-07-03).
Rain in July
Dry (3 rainy days or fewer): about 1 days with 1 mm or more, 2 mm in total. Year to year it varies a lot - the wettest July was 1997 with 8 mm, the driest 1993 with 0 mm. Humidity averages 70%.
Sea temperature in July
The sea averages 18.7°C - bracing (18-22°c). Depending on the year it ranges from 17.6°C to 20.9°C. For the warmest sea here, come in August (19.2°C).
Sunshine and daylight
Around 11.1 hours of sunshine a day (estimated from cloud cover), 14.5 hours of daylight: the sun rises about 06:24 and sets about 21:01 local time in mid-July. Average cloud cover is 23%.
Is July a good time to visit Lisbon?
Yes - it is one of the better months: hot days, little rain and long sunny days. The best months for Lisbon on our scoring are July, August, September; months averaging 25°C or more: Jul, Aug.
Warm days, with hotter spells to plan around
The average high makes July sound fairly gentle, but it does not tell the whole story. Temperatures reach 25°C on 56% of days and 30°C on 13%, so you should be comfortable with the possibility of hotter afternoons. Do your more energetic walking in the morning, then make lunch and the middle of the day a slower, shaded stretch. Light, breathable clothes, sunscreen and a hat make sense. Evenings are cooler than afternoons, though the average night low is still mild. A light layer is useful if you tend to feel chilly when sitting outside, rather than packing only for daytime heat.
Reliable outdoor weather, but bracing water
Rain is unlikely to shape your plans: July averages about 1 rainy day. That makes it a practical month for spending time outdoors without building your itinerary around wet-weather alternatives, though it is not a guarantee of an entirely dry stay. There are about 11.1 hours of sunshine within 14.5 hours of daylight, giving you room to shift activities away from the hottest part of the day. The sea is the main mismatch with that summery weather. Its average temperature is 18.7°C, so expect a bracing dip rather than a leisurely warm-water swim. July suits travellers who value dry city days more than warm water.
A little perspective
Lisbon through the year
July is highlighted. See how it compares with the rest of the year.
| Month | Day | Night | Sea | Sun/day | Rain mm | Rainy days | Days 25°C+ |
|---|---|---|---|---|---|---|---|
| January | 13.6°C | 9.1°C | 14.5°C | 4.6 | 68 | 9 | 0% |
| February | 14.4°C | 9.2°C | 14.0°C | 5.3 | 52 | 7 | 0% |
| March | 16.7°C | 10.8°C | 14.4°C | 5.9 | 53 | 8 | 0% |
| April | 18.1°C | 12.3°C | 15.3°C | 6.7 | 53 | 8 | 2% |
| May | 20.8°C | 14.4°C | 16.7°C | 7.8 | 44 | 6 | 17% |
| June | 23.9°C | 16.7°C | 18.0°C | 9.7 | 11 | 2 | 33% |
| JulySelectedbest | 26.0°C | 18.1°C | 18.7°C | 11.1 | 2 | 1 | 56% |
| Augustbest | 26.6°C | 18.7°C | 19.2°C | 10.2 | 4 | 1 | 63% |
| Septemberbest | 24.7°C | 17.8°C | 19.2°C | 7.9 | 29 | 4 | 42% |
| October | 21.2°C | 15.7°C | 18.2°C | 5.5 | 78 | 9 | 12% |
| November | 16.9°C | 12.4°C | 16.6°C | 4.8 | 84 | 10 | 0% |
| December | 14.5°C | 10.2°C | 15.2°C | 4.1 | 79 | 9 | 0% |
Day = average daytime high, night = average night-time low, 1991-2020.Sun is hours per day; rainy days count 1 mm or more.
Day, night and sea
Monthly average temperatures, 1991-2020
- Day
- Night
- Sea
Best months here
On warmth, low rainfall and sunshine, start with these.
Keep exploring
Similar in July
Closest matches on daytime temperature, sea temperature and sunshine, in other countries.
Spain · 26°C by day · sea 22°C
La Gomera
Hungary · 27°C by day
Budapest
Spain · 26°C by day · sea 22°C
Tenerife
Spain · 28°C by day · sea 22°C
Gran Canaria
Italy · 28°C by day
Lake Garda
A little more detail
Lisbon in July FAQs
Plain answers, grounded in the averages.
Is Lisbon hot in July?
Lisbon is hot in July: the average daytime high is 26.0°C and nights average 18.1°C. About 56% of July days reach 25°C or more.
Can you swim in the sea in Lisbon in July?
The sea around Lisbon averages 18.7°C in July, which is bracing - fine for a quick dip, cool for long swims. Between 1991 and 2020 it ranged from 18°C to 21°C depending on the year.
How much does it rain in Lisbon in July?
Lisbon sees about 1 rainy days (1 mm or more) and 2 mm of rain in a typical July. The wettest July between 1991 and 2020 was 1997 (8 mm) and the driest was 1993 (0 mm).
How sunny is Lisbon in July?
Lisbon gets around 11.1 hours of sunshine a day in July out of 14.5 hours of daylight (estimated from average cloud cover).
How does Lisbon compare with the UK in July?
Lisbon is on average 4.2°C warmer than London by day in July (26.0°C against 21.8°C).
What is the hottest July on record in Lisbon?
Between 1991 and 2020 the hottest July day in Lisbon reached 37.9°C on 1991-07-18, and the coldest night dropped to 14.8°C on 2002-07-03.
How much warmer is Lisbon than London in July?
Lisbon's average daytime high is 26°C, compared with 21.8°C in London, a difference of 4.2°C. That is a noticeable step up for walking around a city, so plan for more shade and lighter clothing than you might need at home.
Is July Lisbon's warmest month?
July ranks as Lisbon's second-warmest month, so it is firmly a summer-weather choice rather than a way to avoid heat. It suits travellers happy with warm afternoons, but anyone sensitive to heat should allow for slower days and midday breaks.
About these averages
ERA5-Land climate reanalysis via Open-Meteo (11 km grid) and NOAA Coral Reef Watch 5 km sea temperatures, 1991-2020
Averages computed from daily values at Lisbon. Sea temperature from the nearest 5 km sea cell, 2.1 km from that point. Sunshine hours are estimated from average cloud cover.Records are the highest and lowest daily values in that 30-year period, not all-time records. These are climate averages, not a forecast for your trip. How we measure holiday weather
- Hot · 25°C+
- Warm · 20°C to below 25°C
- Mild · 15°C to below 20°C
- Cool · below 15°C