Weather by month for Porto, the best months to go and how Portugal's regions differ, scored from 10 years of climate data.
Jun, Jul, Aug, Sep
The highest month scores: comfortable temperatures, little rain and plenty of sun.
Highs 22°C to 25°C · 3–8 rain days
Feb, Mar, Apr, May, Oct, Nov
Still good weather, just not quite the top months.
Highs 15°C to 21°C · 9–14 rain days
Jan, Dec
No months with tough weather, but these are only average.
Highs 14°C to 15°C · 12–14 rain days
Weather by month
Average highs and lows, rain days, sunshine, sea temperature and our month score out of 10.
| Month | High / low | Rain days | Sunshine | Sea temp | Score |
|---|---|---|---|---|---|
| January | 14°C / 7°C | 12 days (162 mm) | 6.6 h/day | 14°C | 5.1/10 |
| February | 15°C / 8°C | 10 days (120 mm) | 7.9 h/day | 14°C | 6.2/10 |
| March | 16°C / 9°C | 13 days (146 mm) | 9.0 h/day | 14°C | 6.3/10 |
| April | 18°C / 10°C | 12 days (135 mm) | 10.7 h/day | 16°C | 7.5/10 |
| May | 20°C / 13°C | 9 days (85 mm) | 11.8 h/day | 16°C | 8.2/10 |
| Best month: June | 22°C / 15°C | 8 days (50 mm) | 13.0 h/day | 18°C | 8.5/10 |
| Best month: July | 24°C / 17°C | 3 days (13 mm) | 13.4 h/day | 18°C | 9.3/10 |
| Best month: August | 25°C / 17°C | 3 days (14 mm) | 12.1 h/day | 17°C | 9.5/10 |
| Best month: September | 24°C / 16°C | 6 days (68 mm) | 10.8 h/day | 17°C | 8.9/10 |
| October | 21°C / 14°C | 13 days (183 mm) | 8.1 h/day | 18°C | 7.4/10 |
| November | 17°C / 11°C | 14 days (167 mm) | 6.8 h/day | 17°C | 6.2/10 |
| December | 15°C / 9°C | 14 days (182 mm) | 6.4 h/day | 15°C | 5.2/10 |
Figures for Porto; the country's best months are weighted across its cities. Best months are highlighted. How we score months
Month by month
14°C / 7°C · 12 rain days · 6.6 h sun · sea 14°C
January in Porto is cool and wet. Highs reach 13.5°C, lows drop to 7°C, and rain falls on 11.7 days, about 162 mm in total. The sea is 13.9°C, cold for swimming. The score is 5.1, a verdict of ok. It suits city walks, cafés and museums if you pack a good rain jacket.
15°C / 8°C · 10 rain days · 7.9 h sun · sea 14°C
February is a little milder and drier than January. Highs are 14.7°C and rain falls on 10.4 days, about 120 mm in total. You get around 7.9 hours of sun a day. The score rises to 6.2, a verdict of good, but the sea is still only 14°C.
16°C / 9°C · 13 rain days · 9.0 h sun · sea 14°C
March brings highs of 15.8°C and lows of 8.6°C. Rain is frequent: 13.2 rain days and about 146 mm, so expect showers between sunny spells. Sun rises to 9 hours a day. The score is 6.3, a verdict of good, as long as you plan for wet days.
18°C / 10°C · 12 rain days · 10.7 h sun · sea 16°C
April is the first month with a verdict of best, with a score of 7.5. Highs reach 17.8°C and sun climbs to 10.7 hours a day. Rain still falls on 12.2 days, about 135 mm, so keep an umbrella close. It is pleasant weather for sightseeing on foot.
20°C / 13°C · 9 rain days · 11.8 h sun · sea 16°C
May is warm and much drier. Highs are 20.2°C, lows 12.9°C, and rain falls on just 9.2 days, about 85 mm. You get around 11.8 hours of sun a day. The score is 8.2, a verdict of best, with comfortable conditions for walking and day trips.
22°C / 15°C · 8 rain days · 13.0 h sun · sea 18°C
June has highs of 21.8°C and only 7.6 rain days, with about 50 mm of rain. Sun reaches 13 hours a day. The sea warms to 17.9°C, still fresh for swimming. The score is 8.5, a verdict of best, with long, bright days for exploring.
24°C / 17°C · 3 rain days · 13.4 h sun · sea 18°C
July is dry and sunny in Porto. Highs reach 24.4°C, rain falls on just 3.3 days, about 13 mm, and sun peaks at 13.4 hours a day. The sea is 17.5°C, cool even in summer. The score is 9.3, a verdict of best.
25°C / 17°C · 3 rain days · 12.1 h sun · sea 17°C
August is the warmest and driest month, with highs of 24.7°C and rain on only 2.6 days, about 14 mm. Sun averages 12.1 hours a day and the sea is 17.3°C. The score is 9.5, the highest of the year, with a verdict of best.
24°C / 16°C · 6 rain days · 10.8 h sun · sea 17°C
September stays warm, with highs of 23.5°C and lows of 15.6°C. Rain returns slowly: 5.5 rain days and about 68 mm. The sea is 17.1°C and sun lasts 10.8 hours a day. The score is 8.9, a verdict of best, so summer weather lasts through the month.
21°C / 14°C · 13 rain days · 8.1 h sun · sea 18°C
October is still mild, with highs of 20.7°C and the warmest sea of the year at 18.2°C. But it brings the most rain of any month, about 183 mm over 12.9 rain days, as autumn storms arrive. The score is 7.4, a verdict of good. Expect a mix of warm and very wet days.
17°C / 11°C · 14 rain days · 6.8 h sun · sea 17°C
November has tough weather: it has the most rain days of the year, 14.1, with about 167 mm of rain. Highs fall to 16.6°C and sun drops to 6.8 hours a day. The score is 6.2, a verdict of good. It works well for indoor sights and food if you are ready for frequent rain.
15°C / 9°C · 14 rain days · 6.4 h sun · sea 15°C
December is grey and wet. Rain falls on 14 days, about 182 mm in total, and sun is the lowest of the year at 6.4 hours a day. Highs are 14.7°C and lows 8.8°C. The score is 5.2, a verdict of ok, so bring waterproofs and plan indoor options.
By trip type
City sightseeing
June to September suit city breaks best. In Porto, highs run from 21.8°C in June to 24.7°C in August, and rain falls on only 2.6 to 7.6 days a month. September is still warm at 23.5°C, with 5.5 rain days.
Beach
July and August are the beach months. Porto has highs of about 24°C and only 3.3 and 2.6 rain days. The Atlantic stays cool, though: the sea is only 17.5°C in July and 17.3°C in August.
Hiking & nature
July to September, plus June, are best for hiking. These are Porto's driest months, with 13 to 68 mm of rain. July gets 13.4 sun hours a day. Highs stay mild for walking, between 21.8°C and 24.7°C.
Events calendar
Public holidays: New Year's Day (1 Jan)
Public holidays: Carnival (17 Feb)
Public holidays: Good Friday (3 Apr), Easter Sunday (5 Apr), Freedom Day (25 Apr)
Public holidays: Labour Day (1 May)
Public holidays: Corpus Christi (4 Jun), National Day (10 Jun)
Public holidays: Assumption Day (15 Aug)
Public holidays: Republic Day (5 Oct)
Public holidays: All Saints Day (1 Nov)
Public holidays: Restoration of Independence (1 Dec), Immaculate Conception (8 Dec), Christmas Day (25 Dec)
Keep planning
FAQ
August is the best month, based on Porto climate data from 2015–2024. It has the highest score of the year at 9.5. Days reach about 24.7°C, nights stay near 16.6°C, and there are only 2.6 rainy days with 14 mm of rain. July is close behind at 9.3, with highs of 24.4°C and 3.3 rainy days. September and June also rank among the best months.
Yes, September is one of the best months, with a score of 8.9. In Porto, days are still warm at about 23.5°C, and you get 10.8 hours of sun a day. Rain stays fairly low at 5.5 rainy days and 68 mm. October changes sharply, with 12.9 rainy days and 183 mm of rain.
December is an ok month, with a score of 5.2. In Porto it is mild but wet. Highs are about 14.7°C and lows about 8.8°C. Expect 14 rainy days, 182 mm of rain and 6.4 hours of sun a day. It suits travellers who want city sights and don't mind grey, rainy weather. January is similar, with a score of 5.1.
The sea stays cool in summer, based on Porto data. The water is about 17.9°C in June, 17.5°C in July and 17.3°C in August. The sea is warmest in October at 18.2°C. By then, though, the rain has returned, with 12.9 rainy days. In winter the water drops to about 13.9°C in January.
Enter to search · Esc to close