Quick answer: The best time to visit Portugal is May–June and September–October. Peak season is July–August (Algarve packed), and the months to avoid are nothing severe — winter is just cooler and wetter.
Portugal enjoys a mild, sunny climate with warm summers and gentle, wetter winters. Late spring and early autumn are ideal — warm and sunny without the Algarve’s peak-summer crowds.
Portugal Weather by Month
| Month | Avg High | Avg Low | Rain | Crowds | Verdict |
|---|---|---|---|---|---|
| January | 15°C / 59°F | 8°C / 46°F | Wet | Low | Shoulder — Mild and wet; very cheap. |
| February | 16°C / 61°F | 8°C / 46°F | Wet | Low | Shoulder — Mild; almond blossom in the Algarve. |
| March | 18°C / 64°F | 9°C / 48°F | Light | Med | Good — Spring; pleasant and quiet. |
| April | 20°C / 68°F | 11°C / 52°F | Light | Med | Great — Warm and blooming; great value. |
| May | 23°C / 73°F | 13°C / 55°F | Dry | High | Best — Warm, sunny and ideal. |
| June | 26°C / 79°F | 15°C / 59°F | Dry | High | Great — Warm, dry, with long days. |
| July | 28°C / 82°F | 17°C / 63°F | Dry | High | Mixed — Hot and sunny; the Algarve is packed. |
| August | 29°C / 84°F | 17°C / 63°F | Dry | High | Mixed — Hottest and busiest. |
| September | 27°C / 81°F | 16°C / 61°F | Dry | High | Best — Warm sea, easing crowds — the sweet spot. |
| October | 22°C / 72°F | 13°C / 55°F | Light | Med | Best — Mild, pleasant, fewer tourists. |
| November | 17°C / 63°F | 10°C / 50°F | Wet | Low | Shoulder — Cooler and wetter; quiet. |
| December | 15°C / 59°F | 8°C / 46°F | Wet | Low | Shoulder — Mild and wet; festive. |
Best Time to Visit Portugal
For the best balance of weather, value and manageable crowds, target May–June and September–October. The table above breaks down every month so you can match the season to your trip.
Portugal Weather in July
July is peak season in Portugal — hot, dry and sunny, with the Algarve’s beaches at their busiest and priciest. Lisbon and Porto stay comfortable with Atlantic breezes; book accommodation well ahead.
Portugal Weather in September
September is the ideal month: the sea is at its warmest, days are still hot and sunny, and the summer crowds have thinned. Prices drop noticeably from mid-month.
Portugal weather month by month
Portugal enjoys one of Europe’s mildest climates, with a long warm season — especially in the Algarve south.
| Season | What to expect |
|---|---|
| Spring (Mar-May) | Mild and green, 16-23°C; great for cities and hiking. |
| Summer (Jun-Aug) | Warm-hot, sunny, beach season; the Algarve fills up. |
| Autumn (Sep-Oct) | Warm sea, fewer crowds; the Algarve stays swimmable into October. |
| Winter (Nov-Feb) | Mild (especially the south), some rain; quiet and cheap. |
Best months overall: May-June and September — warm, sunny and uncrowded, with the Algarve good into October.
The Shoulder-Season Sweet Spot: Why September Beats August for the Algarve and the Douro
The honest read on timing Portugal is that the two shoulder windows do not deliver the same trip, so pick by what you want. Late May into June is the value play before European school holidays start: warm, dry days, full services at the coast, and Lisbon’s Festas de Santo Antonio peaking on the night of June 12 and the public holiday on June 13, when neighbourhoods grill sardines and stage the marches on Avenida da Liberdade. September is the stronger half of the year for two specific reasons. Algarve villa and hotel rates commonly run around 40 to 50 percent below August, and the Douro Valley vindima (grape harvest) runs roughly mid-September into mid-October at a comfortable 22 to 26C, when several quintas let visitors join the picking and foot-treading.
The period to schedule around is late July through mid-August, and not only for crowds. The interior bakes: Evora and the Alentejo average highs near 35 to 36C, and recorded heatwaves have pushed past 40C. Lisbon shoulder-season hotels often sit near 130 euros a night against 180 to 220-plus at the August peak.
- Best value with services open: late May to June
- Best beaches and wine: September
- Skip if heat-sensitive: the inland Alentejo in August
Portugal Weather By Month FAQ
What is the best month to visit Portugal?
May-June and September — warm and uncrowded, with the Algarve good into October.
Is Portugal warm year-round?
The south (Algarve) stays mild even in winter; summers are warm and sunny nationwide.
Frequently Asked Questions
When is the best time to visit Portugal?
May–June and September–October — warm, sunny weather and fewer crowds than the July–August Algarve peak.
Is the sea warm in Portugal?
The Atlantic is cool; it is warmest (and most swimmable) from July to September, especially in the Algarve.
When is the cheapest time to visit Portugal?
November–March is cheapest, with mild Lisbon and Algarve days, though it is wetter and some beach resorts wind down.
Looking for a recommendation, not just data? See our best time to visit Portugal guide.
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Written by
John Morrison is the founder and lead travel writer at Packzup. Over the past decade he has explored destinations across Africa, the Americas, Asia, Europe, the Middle East, and Oceania — always self-funded, never on a press trip.