What is the weather like in Lisbon in September?

Expect temperatures between 18°C and 25°C with 10% average rain probability and about 8 hours of sunshine daily.

What is the weather like in Lisbon in September?

Lisbon in September scores 66/100 based on 30 years of climate data. Solid choice for most travelers.

Who should visit Lisbon in September?

September in Lisbon is ideal for: Families with children, Elderly travelers, Outdoor enthusiasts, Photographers, Cultural tourists.

Lisbon Weather in September | 30-Year Forecast

Avg High

25°C

Hottest around day 1

Avg Low

18°C

Coolest around day 23

Rainy Days

0days

10% avg rain chance

Sunshine

8hrs/day

Autumn season

Sea Temperature in September

Atlantic Ocean(Atlântico)

18.5°C

Monthly Average

Water Feel

🏊Pleasant

Comfortable for most swimmers

Swim Rating

👍Good for swimming

Based on average sea surface temperature

Body of Water

Atlantic Ocean

Atlântico

Lisbon coastline

Essential Travel Info for Lisbon

🗓️ Best Time to Visit 📖 Travel Guide 🍴 Food Guide

Currency

EUR

€ Euro

Language

Portuguese

Driving

Right side

Connect

All of Lisbon has 4G from all Portuguese...

Safety

Very High Safety

GPI: 1.301

Travel Intelligence

Exclusive flight analytics & health data for Lisbon

Smart Flight Estimator

Airport-to-Airport Logistics

unlock smart flight estimates

Add your home location in settings to see airport details.

Flight Connectivity Analysis

Airport traffic data & seasonal patterns

Major Hub

100/ 100

Traffic Index

Extremely busy airport

Peak Daily Arrivals

slots per day

Peak

Sep

Low

Jan

Monthly Traffic Distribution

262

Jan

311

Feb

305

Mar

323

Apr

337

May

843

Jun

1238

Jul

1242

Aug

1253

Sep

1187

Oct

1041

Nov

720

Dec

Traffic Level

Low Season

Key Connections

Madrid Adolfo Suárez –Barajas (MAD)

Barcelona (BCN)

Paris Orly (ORY)

Funchal Madeira (FNC)

Porto Francisco de Sá Carneiro (OPO)

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 Lisbon?

👍Solid choice for most travelers(66/100)

Short Answer

Popular September in Lisbon offers 25°C and 10% rain chance - excellent conditions that attract maximum visitors. Book 3-6 months ahead for best rates.

Decision Factors

Vaccinations required

Yellow Fever

Peak tourist season

100% of annual peak - expect crowds and peak prices

Ideal temperature range

25.2°C - perfect for sightseeing and outdoor activities

Excellent dry conditions

Only 10% rain probability - ideal for outdoor activities

Health precautions needed

Be aware of: Leptospirosis, Leishmaniasis, Zika

Plenty of sunshine

10.5h of sunshine daily

Good For

👨‍👩‍👧‍👦
Families with children
Comfortable 25.2°C temperatures and low 10% rain risk
👴
Elderly travelers
Comfortable 25.2°C temperature range with manageable humidity
🥾
Outdoor enthusiasts
Ideal hiking conditions: 25.2°C, 10% rain chance
📸
Photographers
10.5h sunshine, 64% clear skies for golden hour shots
🏛️
Cultural tourists
Comfortable conditions for exploring museums and sites

Who Should Avoid

💰
Budget travelers
Peak season means premium prices everywhere

"According to 30YearWeather's analysis of 30 years of NASA POWER satellite data,Lisbon in September averages 25°C with 10% precipitation probability."

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

Frequently Asked Questions: Lisbon in September

What are the temperatures in Lisbon in September?

Daytime highs average 25°C, nights drop to 18°C. Temperatures remain fairly consistent.

How many rainy days in Lisbon in September?

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

What to wear in Lisbon in September?

Comfortable casual wear with a light jacket for evenings.

Is September peak season in Lisbon?

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

Lisbon Weather in September

Sea Temperature in September

Lisbon September Weather Calendar

Essential Travel Info for Lisbon

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 Lisbon?

Decision Factors

Good For

Who Should Avoid

Related Guides

Frequently Asked Questions: Lisbon in September

What are the temperatures in Lisbon in September?

How many rainy days in Lisbon in September?

What to wear in Lisbon in September?

Is September peak season in Lisbon?