AI-generatedPorto at a glance
- Best time
- Jun – Sep
- Warmest month
- Aug · 26°
- Warmest sea
- Sep · 17.4°
- Sunshine a year
- 2,520 h
- Rain a year
- 1,275 mm
- Climate
- Mediterranean
- Time zone
- UTC+0 / UTC+1
- Elevation
- 91 m
Climate in Porto
Porto has a Mediterranean climate with warm to hot, dry summers and mild, wetter winters. August is the warmest month with average highs of 26 °C, while January is the coolest at 13 °C. With around 2,520 hours of sunshine a year, Porto is sunny; July is the sunniest month with 10.6 hours a day.
Holiday weather through the year
Weather in October
Holiday weather in October
Good
Best time to visit: June – September
A typical day in October
- Morning, 08:00: about 14°
- Midday, 13:00: about 20°
- Afternoon, 16:00: about 20°
- Evening, 20:00: about 18°
- Night, 23:00: about 16°
07:4518:56
Pleasant evenings; a light layer can help.
Estimated from the average high and low: coolest around sunrise, warmest in mid-afternoon.
What is the weather like in Porto in October?
In October, Porto is mild: daytime highs average 21 °C, and nights cool down to about 14 °C. The sea averages 17.0 °C – bracing, so a wetsuit helps for longer swims. Expect around 6 hours of sunshine a day. Rain is frequent, with about 13 rainy days and 177 mm in total. All in all, October is a good month for a holiday in Porto.
More details for October
- Daylight
- 11 h 11 min07:45 – 18:56
- UV index
- 4 · moderateclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or more
- Wind
- 17 km/haverage daily peak
- Cloud cover
- 59 %on average
- Hot days
- 0 days30 °C or more
- Time zone
- UTC+1Europe/Lisbon
How the score comes together
- Temperatureweight 50 %100 %
- Sunshineweight 20 %42 %
- Few rainy daysweight 30 %35 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in October
- Wetsuit for longer swims
- Sunscreen
- A jumper for the evenings
- Rain jacket or umbrella
Sea temperature in Porto
Monthly sea surface temperature with the range of cooler and warmer years.
8 in 10 years: 15.6 – 18.6 °C
Swimming season: Never above 20 °C
- cold
- fresh
- refreshing
- pleasant
- warm
- very warm
The sea temperature in Porto ranges from 13.4 °C in February to 17.4 °C in September. Even at its warmest the sea stays below 20 °C, so swimming is bracing at best.
The sea warms up slowly: it is warmest in September, while the air already peaks in August. From December to January the sea is even warmer than the afternoon air. The sea temperature varies from year to year: in September, eight out of ten years were between 15.8 and 18.7 °C.
| Month | Average | Cool year | Warm year | Feels |
|---|---|---|---|---|
| JanuaryJan | 13.7° | 12.8° | 14.7° | cold |
| FebruaryFeb | 13.4° | 12.6° | 14.1° | cold |
| MarchMar | 13.8° | 12.7° | 14.4° | cold |
| AprilApr | 14.7° | 13.6° | 16.0° | cold |
| MayMay | 15.6° | 14.6° | 16.7° | cold |
| JuneJun | 16.7° | 15.9° | 17.8° | cold |
| JulyJul | 17.0° | 16.0° | 18.1° | fresh |
| AugustAug | 17.3° | 16.3° | 18.4° | fresh |
| SeptemberSep | 17.4° | 15.8° | 18.7° | fresh |
| OctoberOct | 17.0° | 15.6° | 18.6° | fresh |
| NovemberNov | 15.7° | 14.1° | 17.2° | cold |
| DecemberDec | 14.3° | 13.2° | 15.5° | cold |
Sunshine hours in Porto
Average hours of bright sunshine per day, next to the length of the day. Tap a month to select it.
In October, the sun shines for about 5.5 of 11.2 hours of daylight in Porto, 49 % of the day.
Sunshine hours: estimated from radiation data (ERA5, 1996–2025) and calibrated against measured station values; no weather station is close enough here. Daylight is the time from sunrise to sunset on the 15th of the month.
UV index in Porto
How strong the sun is at noon, month by month, and how quickly unprotected skin burns.
- Clear-sky UV in October
- 4 · moderateAround midday seek shade; use sunscreen, a hat and sunglasses.
The sun is strongest in June (UV 10).
Minutes until sunburn in October
- Very fair skin
- about 35 min
- Fair skin
- about 45 min
- Light brown skin
- about 60 min
- Olive skin
- about 80 min
Rough guide for unprotected skin at noon under a clear sky; clouds lengthen it, water, sand and snow shorten it. Sunscreen extends the time only partly.
Monthly values: clear-sky noon estimate from the sun's angle, ozone and altitude. UV today: Open-Meteo forecast.
Rain in Porto: rainy days and rainfall
A rainy day is a day with at least 1 mm of rain or snow; the amount is what falls in the whole month. Tap a month to select it.
In October, Porto has about 13 rainy days with 177 mm of rain in total.
Climate through the year
Long-term monthly averages. Tap a month to see its details.
Temperatures through the year
Average daytime high, night-time low and sea temperature per month.
| Month | Score | Day | Night | Sea | Sun | Rain days | Rain mm |
|---|---|---|---|---|---|---|---|
| JanuaryJan | 41 | 13° | 6° | 13.7° | 4.3 h | 13 | 156 |
| FebruaryFeb | 56 | 14° | 7° | 13.4° | 5.4 h | 10 | 104 |
| MarchMar | 66 | 16° | 8° | 13.8° | 6.2 h | 11 | 131 |
| AprilApr | 74 | 18° | 10° | 14.7° | 7.0 h | 12 | 126 |
| MayMay | 84 | 20° | 12° | 15.6° | 8.4 h | 11 | 89 |
| JuneJun | 94 | 23° | 15° | 16.7° | 9.6 h | 7 | 45 |
| JulyJul | 100 | 26° | 17° | 17.0° | 10.6 h | 4 | 23 |
| AugustAug | 100 | 26° | 17° | 17.3° | 9.5 h | 4 | 24 |
| SeptemberSep | 89 | 24° | 16° | 17.4° | 7.7 h | 7 | 65 |
| OctoberOct | 69 | 21° | 14° | 17.0° | 5.5 h | 13 | 177 |
| NovemberNov | 54 | 16° | 10° | 15.7° | 4.5 h | 13 | 165 |
| DecemberDec | 42 | 14° | 7° | 14.3° | 4.1 h | 13 | 169 |
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0)
41.15° N, 8.61° W · 91 m · Europe/Lisbon
Best time to visit Porto
The best time to visit Porto is from June to September. The sea stays too cool for a classic beach holiday: even in September it only reaches 17.4 °C. For sightseeing, day trips and hiking, conditions are most comfortable in March and from May to September. Rain is most frequent in April and from October to January; the wettest month is October with 177 mm.
Porto through the seasons
How the weather changes over the seasons, with averages for each.
Porto in spring
Mar – May
Good
- 16–20 °C by day
- Sea 15 °C
- 7 h of sun a day
- 34 rainy days in all
Porto in summer
Jun – Aug
Excellent
- 23–26 °C by day
- Sea 17 °C
- 10 h of sun a day
- 14 rainy days in all
Porto in autumn
Sep – Nov
Good
- 16–24 °C by day
- Sea 17 °C
- 6 h of sun a day
- 33 rainy days in all
Porto in winter
Dec – Feb
Fair
- 13–14 °C by day
- Sea 14 °C
- 5 h of sun a day
- 35 rainy days in all
Find your perfect month
Tell us what you like and we rate every month in Porto for you.
Your best months: June – July, September
Based on the climate averages; tap a month to see its details.
Which month for what?
Beach & swimming
No month
Sea from 21 °C, warm and mostly dry
Sightseeing & hiking
Mar, May – Sep
15–28 °C and not too much rain
Rainy months
Apr, Oct – Jan
12 or more rainy days
Porto month by month
The typical weather for every month at a glance.
41January13° · Sea 14° · 4 h
In January, Porto is cool: daytime highs average 13 °C, and nights cool down to about 6 °C. The sea averages 13.7 °C – swimming is only for the hardy. Expect around 4 hours of sunshine a day. Rain is frequent, with about 13 rainy days and 156 mm in total. All in all, January is a so-so month for a holiday in Porto.
Porto in January56February14° · Sea 13° · 5 h
In February, Porto is cool: daytime highs average 14 °C, and nights cool down to about 7 °C. The sea averages 13.4 °C – swimming is only for the hardy. Expect around 5 hours of sunshine a day. Rain is frequent, with about 10 rainy days and 104 mm in total. All in all, February is a so-so month for a holiday in Porto.
Porto in February66March16° · Sea 14° · 6 h
In March, Porto is mild: daytime highs average 16 °C, and nights cool down to about 8 °C. The sea averages 13.8 °C – swimming is only for the hardy. Expect around 6 hours of sunshine a day. Rain is frequent, with about 11 rainy days and 131 mm in total. All in all, March is a good month for a holiday in Porto.
Porto in March74April18° · Sea 15° · 7 h
In April, Porto is mild: daytime highs average 18 °C, and nights cool down to about 10 °C. The sea averages 14.7 °C – swimming is only for the hardy. The sun shines for around 7 hours a day. Rain is frequent, with about 12 rainy days and 126 mm in total. All in all, April is a good month for a holiday in Porto.
Porto in April84May20° · Sea 16° · 8 h
In May, Porto is mild: daytime highs average 20 °C, and nights cool down to about 12 °C. The sea averages 15.6 °C – swimming is only for the hardy. The sun shines for around 8 hours a day. Rain is frequent, with about 11 rainy days and 89 mm in total. All in all, May is an excellent month for a holiday in Porto.
Porto in May94June23° · Sea 17° · 10 h
In June, Porto is warm: daytime highs average 23 °C, and nights cool down to about 15 °C. The sea averages 16.7 °C – swimming is only for the hardy. With around 10 hours of sunshine a day, there is plenty of sun. Rain falls on about 7 days, adding up to 45 mm. All in all, June is an excellent month for a holiday in Porto.
Porto in June100July26° · Sea 17° · 11 h
In July, Porto is warm: daytime highs average 26 °C, and nights cool down to about 17 °C. The sea averages 17.0 °C – bracing, so a wetsuit helps for longer swims. With around 11 hours of sunshine a day, there is plenty of sun. Rain is rare: about 4 days bring 23 mm in total. All in all, July is an excellent month for a holiday in Porto.
Porto in July100August26° · Sea 17° · 10 h
In August, Porto is warm: daytime highs average 26 °C, and nights cool down to about 17 °C. The sea averages 17.3 °C – bracing, so a wetsuit helps for longer swims. With around 10 hours of sunshine a day, there is plenty of sun. Rain is rare: about 4 days bring 24 mm in total. On about 5 days the thermometer climbs to 30 °C or more. All in all, August is an excellent month for a holiday in Porto.
Porto in August89September24° · Sea 17° · 8 h
In September, Porto is warm: daytime highs average 24 °C, and nights cool down to about 16 °C. The sea averages 17.4 °C – bracing, so a wetsuit helps for longer swims. The sun shines for around 8 hours a day. Rain falls on about 7 days, adding up to 65 mm. All in all, September is an excellent month for a holiday in Porto.
Porto in September69October21° · Sea 17° · 6 h
In October, Porto is mild: daytime highs average 21 °C, and nights cool down to about 14 °C. The sea averages 17.0 °C – bracing, so a wetsuit helps for longer swims. Expect around 6 hours of sunshine a day. Rain is frequent, with about 13 rainy days and 177 mm in total. All in all, October is a good month for a holiday in Porto.
Porto in October54November16° · Sea 16° · 5 h
In November, Porto is cool: daytime highs average 16 °C, and nights cool down to about 10 °C. The sea averages 15.7 °C – swimming is only for the hardy. Expect around 5 hours of sunshine a day. Rain is frequent, with about 13 rainy days and 165 mm in total. All in all, November is a so-so month for a holiday in Porto.
Porto in November42December14° · Sea 14° · 4 h
In December, Porto is cool: daytime highs average 14 °C, and nights cool down to about 7 °C. The sea averages 14.3 °C – swimming is only for the hardy. Expect around 4 hours of sunshine a day. Rain is frequent, with about 13 rainy days and 169 mm in total. All in all, December is a so-so month for a holiday in Porto.
Porto in DecemberPorto compared
Put Porto side by side with another destination.
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Porto vs. Lisbon
In October Lisbon has the better holiday weather (score 80 vs. 69). During the day it is about as warm in Lisbon as in Porto. The sea in Lisbon is 2 °C warmer.
| in October | Porto | Lisbon |
|---|---|---|
| Holiday score | 69 | 80 |
| Daytime high | 21° | 21° |
| Sea | 17° | 19° |
| Sunshine | 6 h | 6 h |
| Rainy days | 13 | 9 |
| Best time | Jun – Sep | May – Sep |
Through the year
Portugal in October: the best places
In October, Porto ranks 3 of 8 destinations in this country.
- Lisbon21°19°80
- 2Funchal21°23°74
- 3PortoThis page21°17°69
- 4Portimão24°20°67
- 5Ponta Delgada21°22°66
- 6Albufeira23°20°63
- 7Lagos22°20°56
- 8Cascais22°19°44
Planning a trip to Porto
Weather for your travel dates
Pick your arrival and length of stay, and we sum up the weather to expect.
Getting there
Flying from
- Nonstop flight
- about 2 h 5 min
- Distance
- 1,310 km
- Time zone
- UTC+1
Estimated from the straight-line distance: 30 minutes for take-off and landing plus 830 km/h cruising speed.
Frequently asked questions about Porto
When is the best time to visit Porto?
The best time to visit Porto is from June to September. That is when the holiday weather score, which combines temperature, sea, sunshine and rain, is highest.
How warm is the sea in Porto?
The sea temperature in Porto ranges from 13.4 °C in February to 17.4 °C in September. Even at its warmest the sea stays below 20 °C, so swimming is bracing at best.
Can you swim in Porto in October?
Only if you don't mind cold water: in October the sea averages just 17.0 °C. Comfortable swimming temperatures are not reached at any time of year.
What is the warmest month in Porto?
August is the warmest month, with average highs of 26 °C and nights around 17 °C. January is the coolest month at 13 °C.
When does it rain most in Porto?
Rain is most frequent in April and from October to January; the wettest month is October with 177 mm. The driest month is July with 23 mm.
How many hours of sunshine does Porto get?
Porto gets around 2,520 hours of sunshine a year. The sunniest month is July with 10.6 hours a day; in December there are 4.1 hours a day.
What time zone is Porto in?
Porto uses the time zone Europe/Lisbon: UTC+0 in January and UTC+1 in July.
How long is the flight from London to Porto?
A nonstop flight from London to Porto takes about 2 h 5 min, for a straight-line distance of about 1,310 km.
Near Porto
Other destinations close by.
Places with a climate like Porto
Destinations whose weather through the year is closest to Porto's – good alternatives.