What is the weather like in Porto in September?

Expect temperatures between 16°C and 24°C with 18% average rain probability and about 8 hours of sunshine daily.

What is the weather like in Porto in September?

Porto in September scores 63/100 based on 30 years of climate data. Worthwhile timing with some trade-offs.

Who should visit Porto in September?

September in Porto is ideal for: Outdoor enthusiasts, Photographers, Cultural tourists, Honeymoon couples, Business travelers.

Porto Weather in September | 30-Year Forecast

Avg High

24°C

Hottest around day 4

Avg Low

16°C

Coolest around day 24

Rainy Days

0days

18% avg rain chance

Sunshine

8hrs/day

Autumn season

Sea Temperature in September

Atlantic Ocean(Atlântico)

17.1°C

Monthly Average

Water Feel

💧Refreshing

Consider a wetsuit for extended swimming

Swim Rating

🏄Cool, wetsuits recommended

Based on average sea surface temperature

Body of Water

Atlantic Ocean

Atlântico

Porto coastline

Essential Travel Info for Porto

🗓️ Best Time to Visit 📖 Travel Guide 🍴 Food Guide

Currency

EUR

€ Euro

Language

Portuguese

Driving

Right side

Connect

Porto has 4G from all Portuguese carrier...

Safety

Very High Safety

GPI: 1.301

Travel Intelligence

Exclusive flight analytics & health data for Porto

Smart Flight Estimator

Airport-to-Airport Logistics

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Flight Connectivity Analysis

Airport traffic data & seasonal patterns

Moderate

54/ 100

Traffic Index

Balanced traffic

Peak Daily Arrivals

slots per day

Peak

Aug

Low

Nov

Monthly Traffic Distribution

Jan

151

Feb

155

Mar

172

Apr

190

May

239

Jun

209

Jul

244

Aug

243

Sep

210

Oct

Nov

165

Dec

Traffic Level

Low Season

Key Connections

Paris Orly (ORY)

Madrid Adolfo Suárez –Barajas (MAD)

Lisbon Portela (LIS)

Geneva Cointrin (GVA)

Barcelona (BCN)

Health & Safety Advisory

CDC travel health recommendations

6 Recommendations

COVID-19

All eligible travelers should be up to date with their COVID-19 vaccines. Please seeYour COVID-19 Vaccinationfor more information.

Hepatitis A

Consider hepatitis A vaccination for most travelers. It is recommended for travelers who will be doing higher risk activities, such as visiting smaller cities, villages, or rural areas where a traveler might get infected through food or water. It is recommended for travelers who plan on eating street food.

Hepatitis B

Recommended for unvaccinated travelers younger than 60 years old traveling to Portugal. Unvaccinated travelers 60 years and older may get vaccinated before traveling to Portugal.

Measles

Cases of measles are on the rise worldwide. Travelers are at risk of measles if they have not been fully vaccinated at least two weeks prior to departure, or have not had measles in the past, and travel internationally to areas where measles is spreading.All international travelers should be fully vaccinated against measles with the measles-mumps-rubella (MMR) vaccine, including an early dose for infants 6–11 months, according toCDC’s measles vaccination recommendations for international travel.

Rabies

Dogs infected with rabies are not commonly found in Portugal.If rabies exposures occur while in Portugal, rabies vaccines are typically available throughout most of the country.Rabies pre-exposure vaccination considerations include whether travelers 1) will be performing occupational or recreational activities that increase risk for exposure to potentially rabid animals and 2) might have difficulty getting prompt access to safe post-exposure prophylaxis.Please consult with a healthcare provider to determine whether you should receive pre-exposure vaccination before travel.For more information, seecountry rabies status assessments.

Yellow Fever

CDC recommendations:Vaccine isnotrecommended.Country entry requirements:Vaccine isnotrequired.Updated April 23, 2025

Source: CDC Travelers' Health

View Complete Health Guide

Is September a Good Time to Visit Porto?

👌Worthwhile timing with some trade-offs(63/100)

Short Answer

Porto's September delivers on its reputation: 24°C, 18% rain, 10.2h sunshine. The trade-off? Peak crowds and prices at 100% capacity.

Decision Factors

Vaccinations required

Yellow Fever

Rough sea conditions

1.59m average wave height - Surfers Only

Peak tourist season

100% of annual peak - expect crowds and peak prices

Ideal temperature range

23.6°C - perfect for sightseeing and outdoor activities

Health precautions needed

Be aware of: Leptospirosis, Leishmaniasis, Zika

Plenty of sunshine

10.2h of sunshine daily

Good For

🥾
Outdoor enthusiasts
Ideal hiking conditions: 23.6°C, 18% rain chance
📸
Photographers
10.2h sunshine, 56% clear skies for golden hour shots
🏛️
Cultural tourists
Comfortable conditions for exploring museums and sites
💑
Honeymoon couples
Wedding score 98/100 with romantic weather conditions
💼
Business travelers
Climate-controlled meetings unaffected by weather

Who Should Avoid

🏖️
Beach lovers
Sea temperature only 17.1°C - too cold for comfortable swimming
💰
Budget travelers
Peak season means premium prices everywhere
👴
Elderly travelers
76% humidity creates difficult conditions

"According to 30YearWeather's analysis of 30 years of NASA POWER satellite data,Porto in September averages 24°C with 18% precipitation probability."

📊 Source: 30YearWeather.com🛰️ Data: NASA POWER (1991-2021)View Methodology →

Frequently Asked Questions: Porto in September

What are the temperatures in Porto in September?

Daytime highs average 24°C, nights drop to 16°C. Temperatures remain fairly consistent.

How many rainy days in Porto in September?

Expect around 0 days with measurable rainfall. Rain is unlikely to disrupt plans.

What to wear in Porto in September?

Comfortable casual wear with a light jacket for evenings.

Is September peak season in Porto?

This is typically peak season with higher prices. Book 2-3 months ahead.

Porto Weather in September

Sea Temperature in September

Porto September Weather Calendar

Essential Travel Info for Porto

Travel Intelligence

Smart Flight Estimator

Flight Connectivity Analysis

Monthly Traffic Distribution

Key Connections

Health & Safety Advisory

COVID-19

Hepatitis A

Hepatitis B

Measles

Rabies

Yellow Fever

Is September a Good Time to Visit Porto?

Decision Factors

Good For

Who Should Avoid

Related Guides

Frequently Asked Questions: Porto in September

What are the temperatures in Porto in September?

How many rainy days in Porto in September?

What to wear in Porto in September?

Is September peak season in Porto?