Weather in Portugal in May

If you're thinking about jetting off to Portugal in May, you're in for a treat. This month is known for mild weather and crowds, and with lots of great events. Here’s our guide to the weather in Portugal in May.

Weather in Portugal in May at a glance

• May in Portugal is generally warm and pleasant, with plenty of sunshine.
• Average temperatures typically range from 59°F to 77°F (15°C to 25°C), and it’s a comfortable time to be outdoors.
• As the weather warms up and the days get longer, tourist crowds start to grow, but it’s still not as busy as the summer months.
• Spring is in full swing, and you can expect to see blooming flowers and lush greenery.

What is the weather like in Portugal in May?

May is a great time to be in Portugal. The days are getting longer, the sun’s out more often than not, and the whole country starts to feel more alive after the quieter winter months.

Temperatures are warm but not too hot—comfortable enough for walking around during the day or sitting outside with a drink. Rain isn’t usually a big issue in May. Most places see somewhere between 20–50mm across the whole month, so while you might get the odd shower, it won’t ruin your trip.

Tourism starts to pick up in May, especially toward the end of the month. It’s not quite the summer rush yet, but you’ll notice more people around popular places.
If you’re planning hikes, beach time, or exploring cities on foot, May gives you the kind of weather that makes it enjoyable without it feeling too intense.

Average temperatures in May

Daytime temperatures usually sit between 68°F (20°C) and 79°F (26°C), depending on where you are, and nights tend to dip to around 50°F (10°C) to 64°F (18°C). It’s warmer than April but still feels manageable—especially if you’re planning to be outdoors a lot.

You’ll mostly get sunny days, though the north can still see a bit of rain here and there. Sea temperatures range from 63°F to 66°F (17°C to 19°C). That’s still pretty brisk, but some people are fine with it, especially in sheltered coves or with a wetsuit. May falls toward the end of spring, and daylight sticks around longer—usually between 10 and 14 hours—so there’s plenty of time to explore without rushing.

Porto and northern Portugal

In Lisbon and central Portugal, May brings steady warmth. Daytime highs usually land between 68°F and 75°F (20°C to 24°C), while nights cool down to around 54°F to 61°F (12°C to 16°C). Rain is possible but usually light. You can expect a lot of sunny days, which makes it a good time to explore the city on foot or take day trips to nearby towns. It’s also when beaches in this region start seeing more locals and travelers. See our guide to how many days you need in Porto. 

Lisbon and central Portugal

Lisbon and Central Portugal experience mild and sunny days in May, with daytime temperatures reaching from about 68°F to 75°F (20°C to 24°C). Evenings provide a slight chill, with temperatures ranging from 54°F to 61°F (12°C to 16°C). Rainfall remains moderate, with an average of 40-60mm over the month.

The Algarve and southern Portugal

May in the Algarve usually feels like the beginning of summer. You’ll get daytime temperatures between 72°F and 79°F (22°C to 26°C), and nights stay comfortable at around 57°F to 64°F (14°C to 18°C). Rain is rare, and most days are dry and clear. While the sea is still cool—about 64°F (18°C)—you’ll start to see people back on the beaches. Even if you’re not swimming, it’s a nice time for sunbathing or walking along the coast without the intensity of the summer sun.

Madeira

Madeira’s climate stays fairly even year-round, and May is no exception. Daytime temperatures usually sit between 68°F and 75°F (20°C to 24°C), and nights hover around 59°F to 64°F (15°C to 18°C). Rain is light, and the island is especially green this time of year. The sea’s a little warmer than on the mainland, around 66°F (19°C), so if you’re thinking about swimming, this might be one of the better spots in Portugal to try it.

Where to go in Portugal in May

May is a nice month for road trips, short breaks, or just staying put in one place for a while. Here are some of the best places to go during this month.  For more ideas, see our guide to the best places to visit in Portugal.

Alentejo

In May, Alentejo really opens up. The region is known for wide-open spaces, and this time of year the plains are covered in wildflowers—especially around Monsaraz and Campo Maior. Red poppies and yellow and purple blooms are everywhere. It’s a good time to take it slow—walk through old villages, drive between small towns, or check out cork forests and olive groves. The weather stays mild, so you won’t be rushing to find shade. It’s also a nice time to visit vineyards, as the vines are just starting to show new growth. This is a great base when on a trip to Portugal with kids.

Lisbon

Lisbon is pretty ideal in May. You can walk just about everywhere without worrying about the heat, and the city still feels easy to navigate before the summer rush hits. The viewpoints around the city are especially nice right now, with clear skies and plenty of space. It’s a good time to visit popular tourist spots like São Jorge Castle and Jerónimos Monastery since the lines are still short. Sintra is also much easier to explore the palaces and yards on foot before it gets hot or too packed. The city stays active well into the evening and it's a great time for a Lisbon city break.

Costa Vicentina

The southwest coast stays quiet in May, and it’s one of the better times to hike the Rota Vicentina. Temps usually range from 60–72°F (16–22°C), and the trails along the cliffs are full of wildflowers. You’ll pass through small towns, beaches, and stretches of protected coastline, and the ocean breeze keeps things comfortable even on longer hikes. This area is still pretty low-key, so it’s a good fit if you’re looking to be outside without too much noise. Bird activity picks up around now, and there’s still decent surf for those interested.

What to do in Portugal in May

May is a great time to be in Portugal. The days are warm but not too hot, and things haven’t yet hit peak tourist season. It’s a month where you can get a feel for local life—festivals are happening across the country, spring produce is everywhere, and you’ve got good conditions for everything from hiking to wine tastings (see our guide to hiking in Portugal). It’s also one of the better times for outdoor exploring.

Hit the beaches in the Algarve

The Algarve beaches are pretty ideal in May. You’ll still get warm, sunny days but without the shoulder-to-shoulder crowds that show up in summer. The sea is on the cooler side but swimmable. It’s also a good time to check out the cliffs and sea caves before boat tours get busy. Towns like Lagos and Tavira still feel local, and it’s easy to find grilled fish and a glass of vinho verde without a wait.

Madeira Flower Festival

If you’re heading to Madeira in May, you’ll catch the Flower Festival in Funchal. The streets fill up with floral carpets, parades, and community displays. Local kids take part in a peace ceremony called the “Wall of Hope,” which adds a nice local touch. It’s not just about the visuals, either—May’s also a great time to hike the island’s levada trails. These old irrigation paths take you through some of the greenest parts of the island, with views over cliffs, forests, and small villages. Everything’s blooming, and the weather’s ideal for walking.

Braga Romana

Braga leans into its Roman roots during Braga Romana. For a few days in May, the city center feels like a historical film set—in a good way. Locals dress up as Roman citizens, vendors recreate old markets, and you’ll stumble across everything from mock gladiator fights to clay-cup wine stands. It’s fun and easy to join in without needing to plan much. Between events, you can check out Braga’s Roman ruins or walk up to Bom Jesus do Monte. The weather’s mild, so you won’t be drenched in sweat while wandering around on foot.  For more ideas, see our guide to undiscovered Portugal off the tourist trail.
 

Plan your trip to Portugal in May

If you're ready to fly out this May, here are some last Portugal travel tips for your trip planning:

What to pack

May might be the best time to be in Portugal—everything’s green, the weather’s great, and it’s not too crowded yet. You’ll mostly need light clothes: T-shirts, breathable pants, and maybe a cardigan for the evening. Sunscreen and a wide-brimmed hat are musts, especially if you're spending time in the Algarve. You might still catch a passing shower up north or in the islands, so toss in a light rain jacket. Walking sandals or comfy shoes are ideal for old towns like Évora or hikes in places like Gerês.

Planning your itinerary

If you’re thinking of traveling to Portugal in May, a sample Portugal itinerary guide can be a great way to start organizing your trip. Here are some you might want to check out:

• 5-day Portugal itinerary: Start in Lisbon for 2 days, then head to Porto for 3 days to explore Ribeira, tour wine cellars, and take a scenic Douro River cruise.
• 7-day Portugal itinerary: From Foz do Minho to Nazaré, Caparica, Galapos, Comporta, and the Algarve beaches, you’ll visit some of the country’s best coastal spots.
• 10-day Portugal itinerary: A 10-day itinerary takes you through Lagos, Évora, Elvas, Lisbon, Coimbra, Serra da Estrela, Porto, and Peneda-Gerês National Park, with a good mix of everything Portugal has to offer.
   

When to book

May is a good time to go for warm weather, fewer crowds, and rates that haven’t climbed too high yet. Just be aware of the week around May 13 if you’re heading near the Fátima sanctuary—that pilgrimage brings big price jumps and you’ll need to book 4–6 months early. 

Douro River cruises are also popular, and it’s smart to book those a couple weeks ahead. Sintra starts getting busy—try to visit in the morning or buy tickets in advance. Accommodations are still decently priced if you book 2–3 months in advance.

Emergency weather information

May usually brings pleasant weather, but it’s not unheard of to get a heatwave or a quick thunderstorm, especially inland. Bring lightweight clothes, sunscreen, and something to stay hydrated. You can follow the weather using the IPMA app or local TV. For help, 112 is the go-to number. Pharmacies with a green cross sign are usually open and can assist with minor health concerns. During hotter days, air-conditioned places like museums or shopping centers are a good break.

For your next adventure, check out our guide on how to plan a trip to Portugal, featuring the best things to do, top places to go, and more, or find extra inspiration in our Portugal travel guide and Portugal trips.