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
Porto highs reach 13.5°C with lows around 7°C, and rain falls on 11.7 days. This is one of the coolest, wettest months, scoring 5.1 ('ok'). New Year's Day starts the month. Pack a warm coat and umbrella if you visit now.
15°C / 8°C · 10 rain days · 7.9 h sun · sea 14°C
Temperatures climb slightly to a 14.7°C high, with 10.4 rain days, giving a 'good' score of 6.2. Sun hours rise to 7.9, hinting at spring ahead. Carnival falls on 17 February, bringing street parades and extra energy to towns.
16°C / 9°C · 13 rain days · 9.0 h sun · sea 14°C
Highs reach 15.8°C but rain days actually increase to 13.2, the wettest spell of spring. The score stays 'good' at 6.3. Sun hours keep climbing to 9, so bright spells alternate with showers.
18°C / 10°C · 12 rain days · 10.7 h sun · sea 16°C
Spring settles in with an 18°C high and rain dropping to 12.2 days. The score jumps to 7.5, rated 'best'. Good Friday, Easter Sunday and Freedom Day (25 April) all fall this month, making it a popular time to travel.
20°C / 13°C · 9 rain days · 11.8 h sun · sea 16°C
Highs hit 20.2°C, rain days fall to 9.2, and sea temperature reaches 16.1°C. The score is 8.2, 'best'. Labour Day on 1 May adds a holiday to this comfortable, sunny month.
22°C / 15°C · 8 rain days · 13.0 h sun · sea 18°C
Summer arrives with a 21.8°C high and just 7.6 rain days. The score reaches 8.5, 'best'. Corpus Christi (4 June) and National Day (10 June) bring two holidays, and sun hours hit 13.
24°C / 17°C · 3 rain days · 13.4 h sun · sea 18°C
This is peak summer: highs of 24.4°C, only 3.3 rain days, and 13.4 sun hours, the sunniest month of the year. The score of 9.3 confirms it as 'best'. Sea temperature sits at 17.5°C, good for swimming.
25°C / 17°C · 3 rain days · 12.1 h sun · sea 17°C
August is the warmest month, with a 24.7°C high and just 2.6 rain days, the driest of the year. It scores 9.5, the highest of any month. Assumption Day on 15 August is the main holiday, falling in the busiest travel season.
24°C / 16°C · 6 rain days · 10.8 h sun · sea 17°C
Warmth lingers with a 23.5°C high and rain days rising modestly to 5.5. Sea temperature peaks at 17.1°C. The score stays strong at 8.9, 'best', making this a reliable late-summer choice.
21°C / 14°C · 13 rain days · 8.1 h sun · sea 18°C
Rain returns sharply, with 12.9 rain days and 183mm of rainfall, the wettest month on record here. Highs still reach 20.7°C and the score of 7.4 keeps it 'good'. Republic Day falls on 5 October.
17°C / 11°C · 14 rain days · 6.8 h sun · sea 17°C
Rain days climb to 14.1, among the highest of the year, with highs dropping to 16.6°C. The score falls to 6.2, 'good'. All Saints Day on 1 November opens a cooler, wetter stretch of autumn.
15°C / 9°C · 14 rain days · 6.4 h sun · sea 15°C
Winter brings a 14.7°C high, 14 rain days and just 6.4 sun hours, the lowest of the year. The score drops to 5.2, 'ok'. Several holidays cluster here: Restoration of Independence, Immaculate Conception and Christmas Day.
By trip type
City sightseeing
June to September suit city trips best. Porto highs run from 21.8°C in June to 24.7°C in August, with sunshine peaking near 13-13.4 hours a day in June and July, and rain drops to just 2.6-5.5 days a month in August and September, good for walking and sightseeing.
Beach
July and August are the top beach months. Sea temperatures reach 17.3-17.5°C, air highs sit at 24.4-24.7°C, and rain is rare, with only 2.6 to 3.3 rainy days a month, so you get long dry stretches on the sand.
Hiking & nature
June through September work well for hiking. Rain days fall sharply from 7.6 in June to as low as 2.6 in August, and temperatures stay warm but not extreme, between 21.8°C and 24.7°C, giving stable, dry trail conditions.
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
Yes, August is one of the best months, with a score of 9.5 out of 10. Porto highs reach 24.7°C and rain is rare, with only 2.6 rain days and 14mm for the whole month. Sea temperature sits at 17.3°C, so swimming is comfortable, and sun hours peak around 12.1 a day.
January rates as just ok, scoring 5.1 out of 10. Porto highs average 13.5°C with lows near 7°C, and it rains on about 11.7 days for a total of 162mm. Sun hours drop to 6.6 a day, so expect a cooler, wetter, greyer start to the year.
Yes, October is a good month, scoring 7.4 out of 10. Highs still reach 20.7°C and the sea stays warm at 18.2°C, its highest reading of the year. Rain picks up though, with 12.9 rain days and 183mm, the wettest total on record in this data.
The best months are August, July, September and June, all scoring 8.5 or higher out of 10. August leads with 9.5, combining warm highs of 24.7°C, almost no rain, and sea temperatures around 17.3°C. These months offer the most sun hours and the driest conditions of the year.
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