Porto weather

Our guide to the weather in Porto during September

25

Average high

5

UV Index

73mm

Monthly rainfall

18

Sea temperature

Porto is a vibrant coastal city with plenty to explore, and September is a great time to visit with mild temperatures and fewer crowds. We've looked at the most up-to-date weather data for Porto, covering the last 12 years up to 2024, plus we've asked our team of travel bloggers for their first-hand experiences in order to answer the most frequently asked questions about Porto weather in September.

What's the weather like in Porto during September?

Mini Adventures In September it's comfortably warm, with plenty of sun and limited rainy days. So you can still enjoy a sunbathe and a swim in the pool. Answered by Mini Adventures

What should I pack for a holiday in Porto during September?

Mini Adventures Suncream, sunglasses, light clothing and a jacket/cardigan for late evening. Comfortable footwear, as Porto is pretty hilly and some streets are quite uneven. Answered by Mini Adventures

What's great about Porto in September?

Mini Adventures A quieter, more relaxed vibe than Lisbon - temperatures are still lovely and warm but slightly cooler than high summer in July and August. Lots of outside seating to soak up the atmosphere and enjoy a sangria! Answered by Mini Adventures

How warm is it in Porto during September?

The temperature reaches around 25℃ during the daytime in September, falling away to 17℃ at night. The UV index will be moderate at this time of year, so not something to worry about for the average person. However, if you're going to be outside for long periods it's worth wearing a broad spectrum SPF 30+ sunscreen and UV-blocking sunglasses. Remember that bright surfaces, such as water and sand increase UV exposure.

Does it rain in Porto during September?

On average, there will be 3 rainy days during the month, amounting to 73.4mm in total. That's broadly comparable with the amount of rain we see in England during the summer months, and would be considered dry. There's a small chance that you'll catch a thunderstorm during your trip.

Is it windy in Porto during September?

You're unlikely to experience any strong winds. Expect a light breeze that picks up slightly at times in September. With moderate humidity and mild air temperatures, the breeze will have a slight cooling effect.

How warm is the sea in Porto during September?

The water around Porto is around 18℃ during September. It will feel a little on the cool when first entering, but you'll warm up quickly. Most kids will have no problem with this temperature, but those who feel the cold are unlikely to want to swim.

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Porto Blog posts

From the Ireland's most popular travel bloggers

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20 city break destinations for 2022

28th March 2022 by The Travel Expert

I’m a big fan of city breaks. I love how much you can discover in a new city such a short space of time. However, if you’re not one for pounding the pavements and covering an entire city on foot, settling down with a coffee and people watching in a town square can be just as enjoyable. We are fortunate to have many of Europe’s top city break destinations available from a variety of Irish airports this year. I have picked my top 20 to inspire your next break away. ...

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Porto city guide

12th March 2018 by The Daily S'elf

Over the last couple of years there’s been a massive increase in interest for Irish tourists travelling to Portugal. Sure, it’s always been popular, but it suddenly seemed like every second person on Instagram was posting pictures of beautiful tiles in Porto and delicious meals in Lisbon rather than package holidays to the Algarve. Keen to find out for myself what all the fuss is about, when I was approached by SuperValu to collaborate on some content surrounding their Real Rewards...

Weather in Porto

Our month-by-month guide to the weather and climate in Porto

13.5

Porto weather in

January
14.3

Porto weather in

February
16.3

Porto weather in

March
17.8

Porto weather in

April
20.8

Porto weather in

May
22.7

Porto weather in

June
25.2

Porto weather in

July
25.8

Porto weather in

August
24.8

Porto weather in

September
21.6

Porto weather in

October
16.2

Porto weather in

November
14.5

Porto weather in

December