2026 Climate Averages

Weather: Porto — September

The weather is near-perfect with ideal temperatures and minimal rain. Recommended month to visit.

🌟 Climate Overview

September is an excellent time to visit Porto. Warm weather with highs of 24°C—great for outdoor activities. Rain is common, so pack an umbrella. As peak season, expect higher prices and more tourists. At 17°C, the sea is too cold for most swimmers.

7.4
GoTripzi Score Great

Based on weather comfort, crowds, prices, and activity options

Avg High

24°C

Avg Low

16°C

Rainy days

10days

Daylight

12.6h

Rainfall

81mm

Sunshine

10.2h/day

Humidity

76%

Humid
Sun Strength

6.8

High
Wind

17 km/h (gusts 33)

Sea Temp

17°C ❄️ Cold

Is September a good time to visit Porto?

The weather is near-perfect with ideal temperatures and minimal rain.

Now

--

Feels like --
Wind --
Humidity --
UV Index --
Local time —

Air Quality

Travel Context

  • Crowds
    Very Busy
  • Travel Costs Peak Rates

Daylight

Sunrise

07:15

Sunset

19:48

12.6h daylight

Visiting Porto in September: Pros & Cons

Pros

  • Comfortable temperatures for sightseeing
  • Abundant sunshine for beach and outdoor fun
  • One of the best months to visit

Cons

  • Peak season — expect crowds and higher prices
  • Sea too cold for comfortable swimming

Things to Do in September

Recommended for This Weather

🚶 Walking tours & sightseeing
🚲 Cycling & bike tours
🏖️ Beach relaxation & sunbathing
🥾 Hiking & nature trails
🏛️ Museums & galleries
🍳 Cooking classes & food tours

Porto Weather by Month

Month Avg High Avg Low Rain Sunshine Humidity UV Index Crowds Condition
Jan 14°C 8°C 12d (160mm) 6.4h
82% Very Humid
2.8 Moderate
Good
Feb 16°C 9°C 10d (96mm) 7.7h
79% Humid
4.1 Moderate
Good
Mar 16°C 9°C 13d (129mm) 9h
77% Humid
5.8 High
Wet
Apr 19°C 11°C 12d (118mm) 10.7h
76% Humid
7.7 Very High
Excellent
May 21°C 14°C 10d (72mm) 12.1h
75% Humid
9.5 Very High
Excellent
Jun 23°C 16°C 9d (60mm) 12.8h
78% Humid
9.9 Very High
Excellent
Jul 27°C 18°C 3d (11mm) 13.2h
72% Humid
10.9 Extreme
Good
Aug 26°C 18°C 2d (8mm) 12.4h
75% Humid
9.6 Very High
Good
Sep Current 24°C 16°C 10d (81mm) 10.2h
76% Humid
6.8 High
Excellent
Oct 21°C 15°C 15d (212mm) 7.8h
82% Very Humid
4.4 Moderate
Excellent
Nov 17°C 11°C 13d (181mm) 6.8h
84% Very Humid
3 Moderate
Wet
Dec 14°C 9°C 17d (178mm) 5.9h
85% Very Humid
2.3 Moderate
Wet

⚖️Find Your Ideal Month

Adjust the sliders to weight what matters most to you.

5
3
3
Your Best MonthJulScore: 7.4
1.Jul
7.42.Aug
7.43.Nov
7.14.Mar
6.65.Dec
6.36.Feb
6.17.Jan
5.68.Jun
5.69.Sep
5.610.May
4.711.Oct
4.712.Apr
4.3

Where to Stay

See hotels, apartments & rentals around Porto – live prices from Booking.com, Expedia, Vrbo and more

Open map in new tab

Porto

Riverside charm, including port wine cellars, Walk across Dom Luís I Bridge and colorful Ribeira district, azulejo tiles, and a bohemian atmosphere.

View Full Destination Guide

What to Pack for September

Summer clothing like shorts, t-shirts, and sundresses will be comfortable. Bring a light cardigan for air-conditioned spaces. A waterproof jacket and shoes are non-negotiable — showers are frequent. Don't forget a wide-brimmed hat and high-SPF sunscreen — the sun is strong.

Moderate Very Busy

🎒Personalized Packing List

Tell us about your trip and we'll create a custom packing list based on the weather.

Your Packing List

📋Essentials
👕Clothing
👟Footwear
🎒Accessories
🧴Toiletries & Health

Planning a trip to Porto?

🔥 Peak season — book early for best rates

Frequently Asked Questions

Is September a good time to visit Porto?
September is typically excellent for visiting Porto, with average highs of 24°C and around 10 rainy days. Plan your activities accordingly—outdoor sightseeing is best on dry days, while rainy days are perfect for museums and indoor attractions.
Does it get cold at night in Porto in September?
Evenings in Porto during September are mild at 16°C. A light cardigan or long sleeves for evenings is usually enough. Outdoor dining remains comfortable, making it a great time to enjoy rooftop bars and terrace restaurants.
What should I pack for Porto in September?
With highs of 24°C and lows of 16°C in September, we recommend: Compact umbrella, Waterproof jacket/shell, Sunscreen SPF 30+, Sunglasses. Layering is key as temperatures can vary between air-conditioned interiors and outdoors. Comfortable walking shoes are essential for cobblestone streets.
Does it rain a lot in Porto in September?
Porto typically sees around 10 rainy days in September. Rain is usually in the form of brief showers rather than all-day downpours, so a compact umbrella is sufficient. Mornings tend to be drier, making them ideal for outdoor sightseeing.
Can you swim in Porto in September?
September is suitable for swimming in Porto, though the water may feel refreshing at first. Air temperatures average 24°C, and most swimmers find it enjoyable once they're in. Midday is usually the warmest time for a dip.
How many hours of daylight are there in Porto in September?
In September, Porto gets approximately 12.6 hours of daylight per day. This affects how much sightseeing you can fit in—longer days mean more time for outdoor activities, while shorter days are perfect for cozy museum visits and early dinners.
Is September peak season in Porto?
Yes, September is peak season in Porto. Expect higher prices for accommodation and more crowds at popular attractions, but also the best weather conditions. Book hotels and major attractions in advance to secure availability and better rates.

Weather Data: Based on 2020–2025 historical climate data from Open-Meteo

Solar calculations: SunCalc (timezone: Europe/Lisbon)

Last Updated: March 2026

More Porto Guides

Best Time to Visit

Coming soon

Things to Do

Coming soon

Where to Stay

Best neighborhoods and hotel recommendations

Find Hotels →

Cost & Budget

Daily costs, money-saving tips, and budget breakdown

Read Guide →

Itineraries

Coming soon

Overview

Complete travel guide for Porto: top things to do, itineraries, and typical costs.

Read Full Guide →