Your June weather guide
WarmWeather in Porto in June
June is a good time for Porto if you want warm city weather rather than a hot beach holiday. Average daytime highs of 23°C suit time outdoors, while nights around 15°C call for a light layer. The catch is the sea: at 16.6°C, it is cold rather than comfortably swimmable. Expect some rain too, so go with flexible plans rather than assuming every day will be dry.
Long-term climate averages for Porto, not a forecast · 1991-2020
Porto, month by month
Your snapshot
At a glance
The useful details for Porto.
- Average daytime high
- 23.0°C
- 9 in 10 days stay below 29°C
- Average night-time low
- 15.0°C
- coldest 10% of nights: 12°C or lower
- Compared with London
- +3.4°C
- London averages 19.6°C in June
- Sea temperature
- 16.6°C
- year to year: 16°C to 17°C
- Sunshine per day (est.)
- 8.2h
- 55% of 14.9 h of daylight
- Rainy days (1 mm+)
- 6
- 39 mm over the month
- Humidity
- 75%
- Days over 25°C
- 29%
- 7% over 30°C
- Record high 1991-2020
- 35.4°C
- 2003-06-19
- Record low 1991-2020
- 9.1°C
- 2014-06-05
- Flight from London
- ≈ 2 h 24 min
- 1286 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 June compares
June is the 4th warmest month of the year in Porto and ranks 124th of 134 destinations we compare for June - see where else is hot in June. Within Portugal it is 11th of 13 (Portugal in June). Against London's average high of 19.6°C in June, Porto is 3.4°C warmer by day and 3.7°C warmer at night.
Daytime and night-time in June
The typical June day in Porto peaks at 23.0°C, but that is an average: the warmest 10% of days reach 29.0°C or more. Roughly 1 in 3 days top 25°C and 1 in 14 pass 30°C. Nights average 15.0°C; one night in ten drops to 12.2°C or lower, so pack a layer for evenings. Between 1991 and 2020 the hottest June day here reached 35.4°C (2003-06-19) and the coldest night 9.1°C (2014-06-05).
Rain in June
Some rain (4-8 rainy days): about 6 days with 1 mm or more, 39 mm in total. Year to year it varies a lot - the wettest June was 2007 with 131 mm, the driest 2011 with 2 mm. Humidity averages 75%.
Sea temperature in June
The sea averages 16.6°C - too cold for most (under 18°c). Depending on the year it ranges from 15.6°C to 17.4°C. For the warmest sea here, come in September (17.5°C).
Sunshine and daylight
Around 8.2 hours of sunshine a day (estimated from cloud cover), 14.9 hours of daylight: the sun rises about 06:01 and sets about 21:09 local time in mid-June. Average cloud cover is 45%.
Is June a good time to visit Porto?
It is a reasonable choice: warm days. The best months for Porto on our scoring are July, August, September; months averaging 25°C or more: Jul, Aug.
Warm days without dependable heat
Porto in June suits travellers who prefer walking in moderate warmth to spending the day in strong heat. Light clothes should work well during a typical afternoon, but pack a jumper or light jacket for evenings rather than relying on summer clothes alone. The coolest nights can fall to around 12°C, so an extra layer is useful if you tend to feel the cold. Hotter afternoons are possible: 29% of days reach 25°C, while 7% reach 30°C. On those warmer days, shift longer walks away from midday and leave room for a shaded break. June offers warmth, but it is not a dependable choice for anyone seeking consistently hot weather.
Keep rain cover handy and swimming expectations modest
With about 6 rainy days, June needs a little flexibility rather than a rain-focused itinerary. Pack a light waterproof and keep an indoor option in mind when the forecast looks unsettled. There is still plenty of scope for outdoor plans, with about 8.2 hours of sunshine a day across 14.9 hours of daylight. That long daylight window lets you move a walk to later if rain interrupts the afternoon, although it does not guarantee clear skies. The sea is the bigger limitation for a beach-led trip: its average of 16.6°C is cold. Treat swimming as an optional cold-water dip if that appeals to you, not as the main reason to choose Porto in June.
A little perspective
Porto through the year
June 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 | 12.9°C | 6.4°C | 13.4°C | 3.8 | 154 | 12 | 0% |
| February | 13.9°C | 6.5°C | 13.0°C | 4.7 | 103 | 9 | 0% |
| March | 16.3°C | 8.2°C | 13.4°C | 5.2 | 123 | 11 | 0% |
| April | 17.5°C | 9.8°C | 14.1°C | 5.8 | 123 | 12 | 4% |
| May | 20.0°C | 12.3°C | 15.2°C | 6.7 | 102 | 11 | 13% |
| JuneSelected | 23.0°C | 15.0°C | 16.6°C | 8.2 | 39 | 6 | 29% |
| Julybest | 25.3°C | 16.7°C | 17.1°C | 9.9 | 22 | 4 | 47% |
| Augustbest | 25.9°C | 17.1°C | 17.4°C | 8.9 | 30 | 5 | 50% |
| Septemberbest | 23.9°C | 15.7°C | 17.5°C | 6.8 | 64 | 6 | 34% |
| October | 20.1°C | 13.2°C | 16.7°C | 4.6 | 166 | 13 | 8% |
| November | 15.7°C | 9.7°C | 15.5°C | 3.8 | 166 | 13 | 0% |
| December | 13.6°C | 7.5°C | 14.1°C | 3.4 | 170 | 13 | 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 June
Closest matches on daytime temperature, sea temperature and sunshine, in other countries.
A little more detail
Porto in June FAQs
Plain answers, grounded in the averages.
Is Porto hot in June?
Porto is warm in June: the average daytime high is 23.0°C and nights average 15.0°C. Roughly 1 in 3 June days reach 25°C.
Can you swim in the sea in Porto in June?
The sea around Porto averages 16.6°C in June, which is cold for swimming without a wetsuit. Between 1991 and 2020 it ranged from 16°C to 17°C depending on the year.
How much does it rain in Porto in June?
Porto sees about 6 rainy days (1 mm or more) and 39 mm of rain in a typical June. The wettest June between 1991 and 2020 was 2007 (131 mm) and the driest was 2011 (2 mm).
How sunny is Porto in June?
Porto gets around 8.2 hours of sunshine a day in June out of 14.9 hours of daylight (estimated from average cloud cover).
How does Porto compare with the UK in June?
Porto is on average 3.4°C warmer than London by day in June (23.0°C against 19.6°C).
What is the hottest June on record in Porto?
Between 1991 and 2020 the hottest June day in Porto reached 35.4°C on 2003-06-19, and the coldest night dropped to 9.1°C on 2014-06-05.
Is Porto warmer than London in June?
Yes. Porto's average daytime high is 23°C, compared with 19.6°C in London, a difference of 3.4°C. That makes it a warmer choice for daytime exploring, though Porto's cooler evenings still justify packing a light layer.
Would July, August or September be a better choice?
July, August and September are the stronger choices overall for weather. June still suits a city trip if warm days are enough for you and you can accept some rain, cool evenings and a cold sea.
Is June suitable if I dislike very hot weather?
Generally, yes: the average daytime high is 23°C, so typical conditions are warm rather than very hot. Heat is still possible, with 7% of days reaching 30°C, so check the forecast and keep midday plans flexible.
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 Porto. Sea temperature from the nearest 5 km sea cell, 6 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