May in Porto averages highs of 20 °C (68 °F) and lows of 13 °C (55 °F), with about 8 rainy days and 14 h 28 min of daylight. The sea is cold, around 15 °C (59 °F).
May weather in Porto at a glance
average high to low each dot ≈ 3 rainy days
Is May a good time to visit Porto?
Good time to go: comfortably warm and some rain. May is usually shoulder season in Porto: fewer crowds than peak months, with prices often a little lower.
Our rule: a month scores 2 points for comfortable average highs of 18–28 °C (1 point for 14–18 or 28–32 °C) and 2 points for 5 or fewer rainy days (1 point for 6–10). Average highs above 35 °C or below 8 °C make it a tough month whatever the rain. A rainy day here means 2 mm of rain or more. 4 points = great, 3 = good, 2 = mixed, 0–1 = tough.
Holidays and events in May 2026
- Fri 1 May: Labour Day (Dia do Trabalhador) public holiday
Banks and many shops close on public holidays, and museums may change their hours, so check before you go.
Things to do in Porto in May
May's weather suits a mix of outdoor sights and museums, so the open-air ones come first.
- Ribeira and the Dom Luís I bridge — walk the top deck at sunset outdoors
- Foz do Douro — ocean promenade and lighthouse outdoors
- Douro Valley day trip — vineyards and river views outdoors
- Port cellars in Vila Nova de Gaia — tastings across the river indoors
- Livraria Lello and Clérigos Tower — book ahead for both indoors
- São Bento station tiles — 20,000 azulejos in the hall indoors
Where to stay: Ribeira and Baixa for sights on foot; Cedofeita for cafés; Foz for the ocean.
What to pack for Porto in May
- Light layers for the day and a jumper for evenings, which cool to 13 °C (55 °F).
- Comfortable walking shoes.
What a day in Porto costs
| Budget traveller | Mid-range | |
|---|---|---|
| Typical total per person, per day | €50–110 | €140–280 |
Excluding flights. May is usually shoulder season in Porto: fewer crowds than peak months, with prices often a little lower.
May in nearby cities
| City | High / low | Rainy days | Verdict |
|---|---|---|---|
| Lisbon | 23° / 14° | 3 | Great time to go |
| Madrid | 24° / 12° | 4 | Great time to go |
| Seville | 28° / 15° | 4 | Good time to go |
Plan your Porto trip
- Romantic Weekend in Porto: 2-Day Plan for Couples (2026)
- How to Plan a Trip in 10 Minutes (2026 Step-by-Step)
- Best Time to Visit Portugal: Month-by-Month Guide 2026
Want the whole trip planned? Join the Journey waitlist: tell it where, when and your budget, and it plans every day hour by hour.
FAQ
Is May a good time to visit Porto?
By the numbers, May is a good time to go: comfortably warm and some rain, with average highs of 20 °C (68 °F) and about 8 rainy days. May is usually shoulder season in Porto: fewer crowds than peak months, with prices often a little lower. The best months for weather are July, August, September.
How warm is Porto in May?
Average highs are 20 °C (68 °F) and lows 13 °C (55 °F) (2015–2024 averages). The sea is cold, around 15 °C (59 °F).
Does it rain a lot in Porto in May?
Expect about 8 days with 2 mm of rain or more, about 85 mm in total. It is the 5th driest month of the year in Porto.
Sources: climate averages from Open-Meteo historical weather (ERA5 reanalysis, 2015–2024); sea temperatures from the Open-Meteo marine API (2023–2024); public holidays from Nager.Date. Daylight is calculated for the 15th of the month. Averages are a guide, not a forecast. Costs are typical ranges per person per day, excluding flights.