Weather in Porto by month: what to expect in Portugal’s coastal city

Порту enjoys a mild coastal climate with distinct wet and dry seasons. From November to February, the city sees the most rainfall, often accompanied by cool breezes and overcast skies. March through May brings a gradual shift toward warmer and sunnier days, making it a pleasant time to explore the city’s historic streets and riverfront.

Summer in Порту spans June to September, offering the driest and warmest conditions of the year. While temperatures rarely feel extreme, the Atlantic influence keeps the air comfortable even during the hottest months. By October, the rains return, and the city settles into a quieter rhythm as autumn unfolds.

Temperatures in Порту remain moderate year-round, with winter lows averaging +6 °C and summer highs reaching +25 °C. The coldest months, January and December, see daytime highs around +13.8 °C to +14.3 °C, while nights can dip to +6 °C or +7.4 °C. Even in winter, frost is rare, and snow is unheard of.

From June to August, Порту warms up, with average highs between +22.9 °C and +25.2 °C. Nights stay mild, rarely dropping below +15.7 °C, making evenings ideal for strolling along the Douro River or enjoying outdoor dining. May and September offer a gentler warmth, with temperatures hovering between +16.4 °C and +20.5 °C, perfect for sightseeing without the summer crowds.

Порту’s rainfall is concentrated in the cooler months, with November to January being the wettest period. During these months, the city receives between 151 mm and 180.6 mm of rain, often spread across frequent but manageable showers. Umbrellas and waterproof layers become essential for exploring the city’s steep streets and open plazas.

The dry season runs from June to August, when rainfall drops dramatically to as little as 22 mm in July. Even in the shoulder months of April and September, precipitation remains moderate, allowing for plenty of dry days. If you prefer to avoid rain, plan your visit to Порту during the summer or early autumn.

For a winter trip to Порту, pack layers to adapt to the cool, damp conditions. A warm sweater, a waterproof jacket, and comfortable walking shoes will help you navigate the city’s cobbled streets and occasional rain. Even in January, temperatures rarely drop below +6 °C, so heavy winter gear isn’t necessary.

Summer visitors to Порту can opt for light, breathable clothing, but a light jacket or shawl is useful for breezy evenings. Sunglasses and sunscreen are a must, as the sun can be strong even when temperatures stay around +20.3 °C to +25.2 °C. If you plan to visit in May or September, a mix of short sleeves and light layers will cover the mild days and cooler nights.