The essentials
When to go to Portugal, in brief
Late April to June: the prime window
Mild and dry, 20-28°C, calm cities and still-quiet beaches. June pairs the best weather with the big street festivals.
September-October: the other window
Heat easing off (18-26°C), sea still warm on the Algarve, fewer people. Ideal to combine surf, cities and vineyards.
July-August, hot and packed
30°C on the coast, 35°C and up in the inland Alentejo. The Algarve fills up and prices climb sharply.
Rainy North, dry South
Porto and the North get the rain in winter. Lisbon and the Algarve stay mild, perfect off-season.
Surf and big waves
Autumn and winter ramp up the swell. Nazaré peaks November to February, home to the biggest waves on the planet.
Festivals to plan around
Santo António in Lisbon (12-13 June), São João in Porto (23-24 June), and grilled sardines everywhere in June.
The verdict
The best periods
Late Apr - June
Mild, dry and uncrowded. June offers the best weather and the Popular Saints festivals. Book 1 to 2 months ahead.
Sept - Oct
Heat easing, sea still warm, harvest in the Douro. One of the best times for the Algarve without the summer crowds.
Jul - Aug
Peak crowds on the Algarve and in Lisbon, highest prices, scorching interior (35°C). Book very early if you have no choice.
Month by month
The full calendar
Tap a month for the detailed guide: weather by region, where to go, festivals.
8 to 15°C
Mild south, calm
9 to 16°C
Mild, few crowds
11 to 18°C
Early spring
13 to 20°C
Mild, passing showers
16 to 23°C
Dry, ideal for cities
18 to 26°C
Popular saints festivals
20 to 30°C
Hot, crowded
21 to 31°C
Peak crowds
19 to 28°C
Warm sea, calm
16 to 23°C
Mild, harvest
12 to 18°C
Surf at Nazaré
9 to 15°C
Mild south, rainy
Climate
Climate by region
| Region | Dry season | Wet season | Verdict |
|---|---|---|---|
| Lisbon & Center | May-June, Sept-Oct: 20-28°C | Mild winter (8°C+), showers | Ideal spring & autumn |
| Algarve (South) | June-Sept: 25-30°C, swimming | Mildest winter on the mainland | Ideal May-June, Sept-Oct |
| Porto & North | May-Oct: 18-26°C, green | Dec-Feb: rainy and cool | Ideal May-October |
| Madeira | Year-round: 18-25°C | Steadily mild, never cold | Ideal year-round |
Calendar
The key events of the year
Santo António (Popular Saints)
Nighttime street parties across Lisbon: grilled sardines, music and dancing until dawn for Saint Anthony's feast.
🇵🇹 Lisbon
Festa de São João
Porto's biggest party for Saint John: fireworks, glowing balloons and plastic hammers for gentle taps on the head.
🇵🇹 Porto
Nazaré Big Wave Season
Nazaré's underwater canyon generates record waves, among the tallest ever surfed. Watch from the lighthouse.
🇵🇹 Nazaré
Douro Grape Harvest
Grape picking on the terraces of the Douro Valley, cradle of port wine. Some quintas let you stomp the grapes.
🇵🇹 Douro Valley
Our analysis
Portugal rewards travelers who aim for the shoulder seasons. From late April to June and September to October, the country offers dry skies, quiet beaches and cities that are still livable. Summer is doable, but the Algarve becomes another world entirely.
The two prime windows, with June on top
From late April to June, the country settles into mild weather: 20 to 28°C, dry skies, calm cities. June stands out, pairing the best weather with the big Popular Saints festivals, in Lisbon as in Porto.
From September to October, the heat eases off (18 to 26°C), the sea stays warm on the Algarve and the summer crowds clear out. It is also harvest season in the Douro Valley. To combine beaches, cities and vineyards, autumn is an excellent compromise.
The crowded summer and the two-speed winter
July and August push the Algarve to saturation: packed beaches, ceiling-high prices, a scorching Alentejo interior at 35°C. If you have no choice, book very early and favor mornings on the beach.
Winter splits the country in two. The Algarve and Lisbon stay mild (8 to 16°C), perfect for an off-season escape. Porto and the North, by contrast, take the rain from December to February. One nuance few anticipate: this is also when Nazaré unleashes its record waves, a sight worth catching from the lighthouse.
FAQ
Frequently asked questions
When is the best time to visit Portugal? +
From late April to June and September to October: 22-28°C, dry skies and calm cities. June is the prime month, with the Popular Saints festivals.
What is the worst time to visit Portugal? +
July and August: peak crowds on the Algarve and in Lisbon, highest prices and a scorching interior (35°C in the Alentejo).
When to go to the beach on the Algarve? +
June to September, when the sea reaches 22-24°C. May and October stay pleasant for lazing and walks, with far fewer people.
Is the weather good in Portugal in winter? +
In the south, yes: the Algarve has the mildest winter on the mainland (8-16°C). Porto and the North, by contrast, are rainy and cool from December to February.
When to see the big waves at Nazaré? +
November to February: the underwater canyon then generates the tallest waves ever surfed. Watch them from the Praia do Norte lighthouse.
Do you need to book far ahead? +
For summer on the Algarve, yes: book two to three months ahead. In spring and autumn, one to two months is enough, except around the June festivals in Lisbon and Porto.
Marie Laurent · Southeast Asia specialist
Updated June 1, 2026