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Rijeka in September

Find out everything about the water temperature in Rijeka in September. Average, minimum and maximum recorded temperatures as well as daily temperature in September for the last two years. Compare the current month's sea temperature data with other months of the year.
Water temperature in September
Minimum:

66.5 °F

Average:

71.2 °F

Maximum:

78.1 °F

Sea water temperature in Rijeka in September

In the city of Rijeka, the month of September is somewhat comfortable for swimming. The minimum recorded temperature during this month was 66.5°F on September 28, 2019, with an average temperature being 71.2°F and a maximum temperature reaching 78.1°F on September 1, 2023.

While some may find it enjoyable for a brief swim, others might consider it a bit too cold for extended periods in the water. Throughout the month of September, the sea temperature gradually gets colder. Starting with an average temperature of 73.1°F at the beginning of the month, it steadily decreases to around 69.1°F by the end.
Date 10 years average 2024 2023
Sep 1 74.8°F 77.3°F 78.1°F
Sep 2 74.3°F 77.7°F 77.1°F
Sep 3 73.8°F 76.6°F 76.9°F
Sep 4 73.3°F 77.1°F 76.4°F
Sep 5 73.2°F 77.6°F 77.2°F
Sep 6 72.9°F 76.5°F 76.7°F
Sep 7 72.6°F 75.0°F 76.1°F
Sep 8 72.4°F 75.0°F 75.5°F
Sep 9 72.2°F 74.6°F 75.4°F
Sep 10 71.9°F 74.2°F 74.9°F
Sep 11 71.7°F 73.8°F 74.2°F
Sep 12 71.7°F 74.0°F 74.1°F
Sep 13 71.6°F 73.8°F 74.1°F
Sep 14 71.6°F 73.5°F 74.4°F
Sep 15 71.5°F 73.1°F 74.6°F
Sep 16 71.3°F 71.0°F 73.6°F
Sep 17 71.3°F 70.8°F 73.4°F
Sep 18 71.2°F 70.0°F 73.3°F
Sep 19 70.9°F 69.9°F 73.5°F
Sep 20 70.6°F 69.6°F 73.2°F
Sep 21 70.4°F 68.8°F 72.6°F
Sep 22 70.1°F 68.8°F 72.9°F
Sep 23 69.7°F 68.5°F 72.7°F
Sep 24 69.4°F 68.4°F 72.4°F
Sep 25 69.1°F 68.2°F 72.4°F
Sep 26 68.8°F 67.9°F 72.3°F
Sep 27 68.6°F 68.9°F 72.1°F
Sep 28 68.5°F 69.3°F 71.6°F
Sep 29 68.2°F 67.9°F 71.1°F
Sep 30 68.1°F 67.7°F 71.1°F

Sea water temperature in Rijeka by month

In Rijeka, the months July through August offer comfortable swimming conditions, which amounts to 71 swimming days. The warmest water in Rijeka was recorded on July 23, 2015, reaching a 82.1°F. While the coldest temperature occurred on February 23, 2021, dipping to 48.0°F. The average readings by season are 53.8°F in Winter, 56.8°F in Spring, 74.4°F in Summer, and 65.9°F in Autumn. September's average temperature is a slight drop from August's average of 76.3°F. In October, the temperature is expected to decrease further, potentially averaging around 65.5°F.

Popular neighboring cities and resorts

City Water temperature* Distance**
Lovran 64.7°F 9mi
Rabac 65.2°F 22mi
Cres 65.3°F 25mi
Senj 64.8°F 32mi
Trieste 66.8°F 39mi
Poreč 65.9°F 42mi
Medulin 66.8°F 43mi
Rovinj 67.1°F 43mi
Mali Lošinj 66.5°F 55mi

* current water temperature in this city

** straight line distance from Rijeka