Portugal in May: Busier Than June in Porto and Coimbra

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Is Portugal crowded in May?

Not by August standards: in May the share of August overnight stays runs from 65% in Lagos to 92% in Coimbra, so every city is below its August level, with Coimbra, Funchal and Porto closest to it and Lagos and Aveiro furthest from it.

We measure crowds as overnight stays from Statistics Portugal (INE), as a share of each city’s busiest month, which is August in every city. The rank table at the end of this page lists the share for all 10 cities.

Is May busier than June?

In Porto, Coimbra and Evora, yes, in all three years of INE data we have. In Lagos, Faro, Cascais and Funchal, no, in all three. In Sintra, Aveiro and Braga the years disagree.

We compared overnight stays for May and June in 2023, 2024 and 2025. May has 31 days and June has 30, so we divided each month’s stays by its days first. Above 1.00 means May was busier.

• Per INE, Coimbra shows the widest gap: 92% of its August level in May and 83% in June, with ratios of 1.17, 1.04 and 1.15.
• Per INE, Lagos shows the widest gap the other way: 65% in May and 77% in June, with ratios of 0.84, 0.87 and 0.83.
• In Funchal the gap is thin, 0.98, 0.99 and 0.98.

Read this as a pattern from three years, not a forecast. INE publishes monthly totals, so we cannot see which week was busy, and we have no event data to say why.

Is it better to visit Portugal in May or June?

June scores higher than May in all 10 cities. The gap is smallest in Funchal, 0.33 to 0.34, and widest in Coimbra and Braga, 0.20 to 0.35 and 0.19 to 0.34. By NASA POWER averages June is also drier everywhere, with 0.2 to 0.6 times May’s rain. The price is a fuller Algarve.

• In Lagos, per INE and NASA POWER, the score rises from 0.41 to 0.43, the share of August rises from 65% to 77%, and rain falls from 1.22 mm to 0.28 mm a day.
• In Coimbra the score rises from 0.20 to 0.35, the share of August falls from 92% to 83%, and rain falls from 1.70 mm to 0.82 mm a day.

For April against May, see Portugal in April. For the cooler end of spring, see Portugal in March. Both are ranked with the same rule.

Is May a good time to visit Portugal?

On our figures May suits the Algarve and Cascais best. It ranks 2nd of the 12 months in Lagos and Cascais and 3rd in Faro, with scores of 0.41 in Lagos, 0.38 in Faro and 0.36 in Cascais. Lagos is also the quietest of the 10.

Porto, Coimbra and Braga are the weak spots, at 0.20, 0.20 and 0.19, each 5th of 12 months. The Lagos best-time page and the Porto best-time page show all 12 months for each.

What is the weather like in Portugal in May?

Highs sit between 19.7 °C (67 °F) and 26.8 °C (80 °F) in every city, and lows between 9.3 °C (49 °F) and 17.4 °C (63 °F). Rain runs from 0.63 mm a day in Funchal to 2.00 mm in Braga. Here is each city, north to south.

• Braga: 21.5 °C (71 °F) high and 9.3 °C (49 °F) low, 2.00 mm of rain a day. The coldest city of the 10 by mean.
• Porto: 20.1 °C (68 °F) high and 13.1 °C (56 °F) low, 1.95 mm of rain a day.
• Aveiro: 21.4 °C (71 °F) high and 12.8 °C (55 °F) low, 1.86 mm of rain a day.
• Coimbra: 23.0 °C (73 °F) high and 10.1 °C (50 °F) low, 1.70 mm of rain a day.
• Sintra: 21.0 °C (70 °F) high and 13.8 °C (57 °F) low, 1.10 mm of rain a day.
• Cascais: 19.7 °C (67 °F) high and 15.1 °C (59 °F) low, 0.99 mm of rain a day.
• Evora: 26.8 °C (80 °F) high and 11.9 °C (53 °F) low, 1.13 mm of rain a day.
• Faro: 22.4 °C (72 °F) high and 15.4 °C (60 °F) low, 1.12 mm of rain a day.
• Lagos: 20.2 °C (68 °F) high and 15.8 °C (60 °F) low, 1.22 mm of rain a day.
• Funchal on Madeira: 20.0 °C (68 °F) high and 17.4 °C (63 °F) low, 0.63 mm of rain a day. The smallest swing of the 10.

Does it rain a lot in Portugal in May?

Not much in the south and a little more in the north: by NASA POWER averages Braga gets 2.00 mm a day and Porto 1.95 mm, against 0.63 mm in Funchal. May is wetter than June in all 10 cities, and rain is a monthly average, not a forecast for your dates.

We divided June rain by May rain from NASA POWER, and the Algarve dries out fastest: Lagos and Faro fall to 0.2 times their May rain by June.

What is the hottest part of Portugal in May?

Inland Evora is the hottest by day, with an afternoon high of 26.8 °C (80 °F), but its nights fall to 11.9 °C (53 °F). Over the whole day Faro is warmest, with a mean of 18.4 °C (65 °F), then Evora at 18.3 °C (65 °F) and Funchal at 18.2 °C (65 °F). Braga is coldest, at 14.3 °C (58 °F).

Can you swim in Portugal in May?

Not on air temperature alone, because afternoon highs of 22.4 °C (72 °F) in Faro, 20.2 °C (68 °F) in Lagos and 26.8 °C (80 °F) inland in Evora are mild to warm air and do not tell you how cold the sea is.

We cannot answer the sea question yet. We have no sourced sea-temperature data for these cities, and air temperature does not tell you the water temperature, so we do not guess.

What should you wear in Portugal in May?

Pack layers, because the gap between the daytime high and the night low is 14.9 °C in Evora, 12.9 °C in Coimbra and 12.2 °C in Braga but only 2.6 °C in Funchal, and rain is likeliest in the north, where shoes that dry help.

Inland, Evora has hot afternoons at 26.8 °C (80 °F), yet nights fall to 11.9 °C (53 °F), and Coimbra and Braga drop to 10.1 °C (50 °F) and 9.3 °C (49 °F), so bring a warm layer for the evening. In Funchal, Lagos and Cascais the swing is small, 2.6 °C, 4.4 °C and 4.6 °C, so one light layer is likely enough day and night. For mobile data on the trip, see the eSIM comparison.

How do the 10 cities rank for May?

We ranked the 10 cities with one rule: mild, dry and not too full scores best. Temperature fit is full marks at a mean of 17 to 24 °C and zero at 8 °C or 30 °C. Dryness is zero at 5 mm of rain a day. The crowd share counts at a weight of 0.7. In May the scores run from 0.19 in Braga to 0.41 in Lagos.

The table shows the high and the low, while the score uses a separate long-term mean of day and night, so it can read colder than sites that print only the high.

What we cannot tell you yet

Figures as of October 2026. Our climate figures are for a grid square of 0.5 by 0.625 degrees, about 56 by 54 km, not a city weather station. A square near the coast mixes in sea air, and Funchal’s square is mostly sea. Rain is a monthly average, not a forecast for your dates. Lisbon is not in our 10 cities.

Planning another month? See Portugal in March, Portugal in April, Portugal in November, Portugal in December, Portugal in January or Portugal in February, ranked with the same rule.

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