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Florianópolis, Brazil · Temperate oceanic

Florianópolis in September: go or not?

Good time. Florianópolis in September gets 7.5/10.

📅 Updated August 2026 🛰️ ERA5 · 10 years 📍 27.60°S · 48.55°W
⚡ This month's verdict
Go for it
Florianópolis · September
7.5
17–22°
Temperature
41%
Rain
5h
Sun
🌊 Seaside☀️ Bright🍴 Gastronomy
Photo : will dornelles via Unsplash
The month in detail

What to expect in September

Autumn in Florianópolis is often underrated: 22.0°C, golden light and declining crowds. An interesting window. Expect rain on 41.0% of days — a light raincoat in the bag is recommended. A good balance between weather and crowds, even if April (7.8/10) remains theoretically better.

September ranks 9 out of 12 months in Florianópolis. Compared to August: 13 pts more rainy days, −0.7h of sun per day.

This month's conditions

What it's like in September

UV index
6 · high
sunscreen and hat advised
Feels like
comfortable
16°
Sea
21°C
cool, invigorating
Daylight
11.8h of daylight
Air quality
good
AQI 39
Compare

Is September the right month?

The best month in Florianópolis is April (7.8/10), 0.3 pt higher than September.

See April →See all 12 months →
Context

Our verdict

Florianópolis ("Floripa" to Brazilians) is the capital of the state of Santa Catarina in southern Brazil: main island (Ilha de Santa Catarina) connected to the mainland by 2 bridges, 500,000 inhabitants, 42 beaches, surf, young/trendy atmosphere. April is my favourite month (8.1/10): 20-25°C, 42% rain, end of the austral summer, mild temperatures.

Read Gilles' full review →

Book

Plan your trip

Hotels at their lowest outside peak season, highest on comfortable months. Shoulder seasons offer a good price/climate compromise.

🎟️ Activities & tours · Florianópolis

GetYourGuide selection · free cancellation

See all →
Affiliate link · GetYourGuide
Practical info

What you need to know before you go

Three angles: the country (language, currency, safety, budget), the year-round climate, and the specifics of a beach holiday.

Country · Brazil

🗣️LanguagePortuguese
💶CurrencyBrazilian Real (R$)
🚗DrivingRight-hand
🛡️Safety Very safe · 1/5
💰Cost of living Cheap · 2/5

🌡️ Climate

🌍Climate typeTemperate oceanic
📈Climate trend Stable
🔥Hottest monthJanuary · 28°C
❄️Coolest monthJune · 21°C
🌧️Rainiest month January · 68%

🏖️ Beach holiday

📅Peak seasonJuin → Sept
🏖️Swell (Sept–Mar) Modérée
Location

Where is Florianópolis ?

Global position + regional geographic context.

🌍 World
🔍 Geographic context
Brazil
Temperate oceanic climate with a 7.8 → 7.3 gap between best and worst month. 10 years of ERA5 data to choose by project.
27.60°S · 48.55°W
Questions

Frequently asked questions

What is the best time to visit Florianópolis?
March is the best month with 28.0°C highs, 22.0°C lows, 6.0h of sunshine and 60.0% rainy days. The months of March & April offer comparable conditions.
How many hours of sunshine does Florianópolis get in March?
Florianópolis averages 6.0 sunshine hours per day in March. It is the sunniest month with a climate score of 7.2/10.
What is the rainiest month in Florianópolis?
October is the most unfavourable month with October has the lowest climate score of the year and the lowest climate score of the year.
What are the temperatures at night in Florianópolis in March?
In March, overnight lows reach 22.0°C, while afternoon highs average 28.0°C.
Is Florianópolis good in winter?
In winter (December-February), Florianópolis scores 7.1/10 on average — Decent period conditions for cultural visits.. The best month overall remains March with a score of 7.2/10.
When should you avoid Florianópolis?
October is the most difficult month to visit Florianópolis, with October has the lowest climate score of the year. Climate conditions are at their lowest of the year during this period.
Can you swim in Florianópolis in September?
In September, the sea averages 21°C in Florianópolis: cool, invigorating. Swimming is possible but brisk; sensitive swimmers may prefer a wetsuit.
Do you need sun protection in Florianópolis in September?
The average UV index reaches 6 in September in Florianópolis (high), with about 11.8h of daylight. Sunscreen and hat advised.