Water temperature in Fornells (Costa Brava) in September

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Is it warm enough to swim in Fornells in September? Average water temperature in Fornells in September is 22.4°C and therefore suitable for comfortable swimming. The warmest sea in Fornells in September is 26.3°C, and the coldest is 19.4°C. To find out the sea temperature today and in the coming days, go to Current sea temperature in Fornells

Changes water temperature in Fornells in September 2025, 2024

To get an accurate forecast for the water temperature in Fornells for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in Fornells, 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	23°C	26°C	21.8°C	26°C
2 September	23°C	26.3°C	21.7°C	26.3°C
3 September	23.2°C	26.2°C	21.6°C	26.2°C
4 September	23.1°C	25.9°C	21.3°C	25.9°C
5 September		25.5°C	21°C	25.5°C
6 September		25.5°C	21°C	25.5°C
7 September		25.6°C	20.9°C	25.6°C
8 September		24.5°C	20.9°C	25°C
9 September		24.8°C	21.1°C	24.8°C
10 September		24.6°C	21°C	24.6°C
11 September		25.1°C	20.9°C	25.1°C
12 September		23.9°C	20.6°C	24.6°C
13 September		23.2°C	20.6°C	24.8°C
14 September		22.4°C	20.9°C	24.3°C
15 September		22.5°C	20.8°C	24°C

Day	2024	Min	Max
16 September	23.1°C	20.8°C	24.7°C
17 September	23.2°C	21°C	23.8°C
18 September	22.7°C	21.2°C	23.4°C
19 September	23°C	21°C	23.2°C
20 September	22.9°C	21°C	23°C
21 September	23.1°C	20.9°C	23.1°C
22 September	23.1°C	20.8°C	23.1°C
23 September	22.6°C	20.5°C	23°C
24 September	23.3°C	20.2°C	23.3°C
25 September	23.6°C	20.1°C	23.6°C
26 September	22.7°C	19.8°C	23°C
27 September	21.6°C	19.6°C	22.9°C
28 September	21.5°C	19.5°C	22.9°C
29 September	21.2°C	19.7°C	22.9°C
30 September	22°C	19.4°C	22.6°C

Average water temperature in Fornells in September over a decade

2015	2016	2017	2018	2019
21.2°C	23°C	22.8°C	22.5°C	21.7°C

2020	2021	2022	2023	2024
23°C	22.8°C	23.4°C	23.3°C	23.7°C

Fornells sea state in September

Chart comparing the height of waves in Fornells 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.

Fornells 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
Pals	22.1°C	19°C	26.2°C
Platja de Pals	22.1°C	19°C	26.2°C
Cala Estreta	22.9°C	19.8°C	27.2°C
Mas Pinell	21.9°C	18.9°C	25.5°C
Els Griells	21.9°C	18.9°C	25.5°C
L'Estartit	21.9°C	18.9°C	26°C
Medes Islands	21.9°C	18.9°C	26°C
Palamos	23°C	20°C	27.1°C
La Fosca	23°C	20°C	27.1°C
Platja d'Aro	23°C	20.2°C	27.1°C

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Our report for Fornells 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.

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Date (day and month)

Water temperature: min 16°C

Average temperature Maximum temperature