What is the weather like in Florianópolis in September?

Expect temperatures between 16°C and 22°C with 32% average rain probability and about 8 hours of sunshine daily.

What is the weather like in Florianópolis in September?

Florianópolis in September scores 63/100 based on 30 years of climate data. Decent conditions for most activities.

Who should visit Florianópolis in September?

September in Florianópolis is ideal for: Cultural tourists, Business travelers.

Florianópolis Weather in September | 30-Year Forecast

Avg High

22°C

Hottest around day 21

Avg Low

16°C

Coolest around day 5

Rainy Days

30days

32% avg rain chance

Sunshine

8hrs/day

Autumn season

Sea Temperature in September

Atlantic Ocean(Oceano Atlântico)

20°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

Oceano Atlântico

Florianópolis coastline

Essential Travel Info for Florianópolis

🗓️ Best Time to Visit 📖 Travel Guide 🍴 Food Guide

Currency

BRL

R$ Brazilian real

Language

Portuguese

Driving

Right side

Safety

Moderate Safety

GPI: 2.465

Travel Intelligence

Exclusive flight analytics & health data for Florianópolis

Smart Flight Estimator

Airport-to-Airport Logistics

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Flight Connectivity Analysis

Airport traffic data & seasonal patterns

Low Traffic

31/ 100

Traffic Index

Quieter airport

Peak Daily Arrivals

slots per day

Peak

Apr

Low

Nov

Monthly Traffic Distribution

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Traffic Level

Low Season

Key Connections

São Paulo Guarulhos - Governador André Franco Montoro (GRU)

Santiago Comodoro Arturo Merino Benítez (SCL)

Rio de Janeiro RIOgaleão – Tom Jobim (GIG)

Campinas Viracopos (VCP)

Buenos Aires Jorge Newbery Airpark (AEP)

Health & Safety Advisory

CDC travel health recommendations

9 Recommendations

COVID-19

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

Chikungunya

There iselevated chikungunya riskin Brazil.Chikungunya vaccinationmay be considered for people traveling or moving to this location if they are planning to stay for an extended period of time (for example, 6 months or more).

Hepatitis A

Recommended for unvaccinated travelers one year old or older going to Brazil.Infants 6 to 11 months old should also be vaccinated against Hepatitis A. The dose does not count toward the routine 2-dose series.Travelers allergic to a vaccine component should receive a single dose of immune globulin, which provides effective protection for up to 2 months depending on dosage given.Unvaccinated travelers who are over 40 years old, are immunocompromised, or have chronic medical conditions planning to depart to a risk area in less than 2 weeks should get the initial dose of vaccine and at the same appointment receive immune globulin.

Hepatitis B

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

Malaria

CDC recommends that travelers going to certain areas of Brazil take prescription medicine to prevent malaria. Depending on the medicine you take, you will need to start taking this medicine multiple days before your trip, as well as during and after your trip. Talk to your doctor about which malaria medication you should take.Transmission areasAll areas in the states of Acre, Amapá, Amazonas, Rondônia, and RoraimaPresent in the states of Maranhão, Mato Grosso, and Pará, but rare cases in their capital cities (São Luis [capital of Maranhão], Cuiabá [capital of Mato Grosso], Belém [capital of Pará])Rare cases and sporadic foci of transmission in rural and forested areas in the states of Espírito Santo, Goiás, Minas Gerais, Mato Grosso do Sul, Piauí, Rio de Janeiro, São Paolo, and TocantinsNo malaria transmission in the cities of Brasília (the capital), Rio de Janeiro, or São PaoloNo malaria transmission at Iguaçu FallsDrug resistanceChloroquineSpeciesP. vivax(90%)P. falciparum(10%)Recommended chemoprophylaxisAtovaquone-proguanil, doxycycline, mefloquine, tafenoquine2Areas with rare cases: No chemoprophylaxis recommended (insect bite precautions and mosquito avoidance only)4Updated April 23, 2025See footnotes

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.

+3 more

Source: CDC Travelers' Health

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Is September a Good Time to Visit Florianópolis?

👌Decent conditions for most activities(63/100)

Short Answer

Ideal beach conditions in Florianópolis during September: 20°C turquoise waters, 22°C air, 32% rain. 0.8m calm waves suit families and swimmers alike.

Decision Factors

Vaccinations required

Yellow Fever

Very high humidity

82% average humidity

Ideal temperature range

21.7°C - perfect for sightseeing and outdoor activities

Health precautions needed

Be aware of: Leptospirosis, Melioidosis, Schistosomiasis

Shoulder season - balanced conditions

69% of peak - good value with moderate crowds

Good For

🏛️
Cultural tourists
Comfortable conditions for exploring museums and sites
💼
Business travelers
Climate-controlled meetings unaffected by weather

Who Should Avoid

👴
Elderly travelers
82% humidity creates difficult conditions

"According to 30YearWeather's analysis of 30 years of NASA POWER satellite data,Florianópolis in September averages 22°C with 32% precipitation probability."

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

Frequently Asked Questions: Florianópolis in September

What are the temperatures in Florianópolis in September?

Daytime highs average 22°C, nights drop to 16°C. Temperatures remain fairly consistent.

How many rainy days in Florianópolis in September?

Expect around 30 days with measurable rainfall. An umbrella is advisable.

What to wear in Florianópolis in September?

Comfortable casual wear with a light jacket for evenings.

Is September peak season in Florianópolis?

This is shoulder season—moderate prices and manageable crowds.

Florianópolis Weather in September