Water temperature in Florianopolis in September

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Is it warm enough to swim in Florianopolis in September? Average water temperature in Florianopolis in September is 19°C and therefore is not suitable for comfortable swimming. The warmest sea in Florianopolis in September is 22.8°C, and the coldest is 16.9°C. Average high air temperature in Florianopolis in September is 21°C, and average low temperature is 15°C. To find out the sea temperature today and in the coming days, go to Current sea temperature in Florianopolis

Changes water temperature in Florianopolis in September 2025, 2024

To get an accurate forecast for the water temperature in Florianopolis for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in Florianopolis, the selected years in the table also show the values of the maximum and minimum temperatures on each of the days of September.

Sea temperature

Tides

Weather forecast

You can choose any other years:

Day	2025	2024	Min	Max
1 September	18°C	18.2°C	16.9°C	20.7°C
2 September	18°C	18°C	17°C	20.3°C
3 September	18.2°C	18.7°C	16.9°C	20.2°C
4 September	18.3°C	18.4°C	17.1°C	20.3°C
5 September	18.5°C	18.4°C	17.1°C	20.3°C
6 September	18.6°C	18.2°C	17.1°C	20.1°C
7 September	18.6°C	18.4°C	17.3°C	20°C
8 September	18.7°C	18.7°C	17.2°C	20.1°C
9 September	17.9°C	18.8°C	17.5°C	20°C
10 September	18.1°C	18.3°C	17.6°C	20.2°C
11 September	18.2°C	19.6°C	17.4°C	20.6°C
12 September	18°C	19°C	17.6°C	20.4°C
13 September	18.3°C	19°C	17.4°C	20.8°C
14 September	18.4°C	19.1°C	17.2°C	20.8°C
15 September	18.9°C	19°C	17.4°C	20.6°C

Day	2025	2024	Min	Max
16 September	19.5°C	18.8°C	17.5°C	20.4°C
17 September	19.5°C	18.9°C	17.6°C	20.8°C
18 September	19.2°C	19.5°C	17.6°C	20.8°C
19 September	20°C	19.4°C	17.9°C	21°C
20 September	19.8°C	19.4°C	17.7°C	22.8°C
21 September	19.8°C	19.8°C	17.5°C	22.1°C
22 September	19.2°C	20.1°C	17.6°C	21.7°C
23 September	19.3°C	20.3°C	17.7°C	21.5°C
24 September	19.4°C	19.8°C	17.9°C	21°C
25 September	19.4°C	19.8°C	17.7°C	20.9°C
26 September	19.1°C	19.8°C	17.1°C	20.8°C
27 September		20.6°C	17.2°C	21°C
28 September		20.3°C	17.7°C	21.1°C
29 September		20.6°C	17.9°C	21.3°C
30 September		20.9°C	17.9°C	21.1°C

Florianopolis water temp chart in September

Average water temperature in Florianopolis in September over a decade

2015	2016	2017	2018	2019
19.2°C	18.2°C	20.5°C	19°C	18.1°C

2020	2021	2022	2023	2024
19.2°C	18.9°C	18.3°C	19.1°C	19.3°C

Florianopolis sea state in September

Chart comparing the height of waves in Florianopolis in September over the past years. The red line indicates the height of the waves when swimming in the sea is prohibited. To view the current sea conditions, click on the graph.

Waves height in Florianopolis in September

Weather and climate in Florianopolis in September

This data display average monthly climate indicators in Florianopolis in September based on our historical weather readings over a period of ten years. In addition to temperature, we include data on the number of rainy and sunny days so you can have all the information about your destination before your trip

Average HIGH temperature21°C
Average LOW temperature15°C
Average humidity
83
Average rainfall days11 days
Average rainfall5.3''/135mm
Average daylight12h
Average sunshine4.3h
Average UV index8

Florianopolis water temperature during other months:

You can also view information about water temperature for other months by clicking on the month button below

Temperature in neighboring cities

The nearest locations with the average water temperature in September. In addition, the maximum and minimum water temperatures for that month, recorded over the last decade, are shown

	Avr	Min	Max
Mole Beach	18.9°C	16.7°C	22.5°C
Barra da Lagoa	18.9°C	16.7°C	22.5°C
Joaquina Beach	18.8°C	16.7°C	22.5°C
Lagoa da Conceicao	18.9°C	16.6°C	22.4°C
Santa Catarina Island	18.8°C	16.8°C	22.4°C
Praia dos Ingleses	19°C	16.8°C	22.6°C
Santinho	19°C	16.8°C	22.6°C
Campeche Beach	18.8°C	16.7°C	22.3°C
Campeche Island	18.8°C	16.7°C	22.3°C
Canasvieiras	19°C	16.7°C	22.4°C

Florianopolis photo gallery

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Our report for Florianopolis is compiled using satellite data together with in-situ observations to get the most reliable daily data of sea surface temperatures, surf forecasts, current temperatures and weather forecasts.

Region

Date (day and month)

Water temperature: min 16°C

Average temperature Maximum temperature