Hermanus in September
Find out everything about the water temperature in Hermanus 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:
57.1 °F
Average:
59.3 °F
Maximum:
62.6 °F
Sea water temperature in Hermanus in September
In the city of Hermanus, the month of September is too cold for swimming. The minimum recorded temperature during this month was 57.1°F on September 8, 2024, with an average temperature being 59.3°F and a maximum temperature reaching 62.6°F on September 27, 2019.
| Date | 10 years average | 2024 | 2023 |
|---|---|---|---|
| Sep 1 | 58.8°F | 57.8°F | 58.2°F |
| Sep 2 | 58.6°F | 57.7°F | 57.9°F |
| Sep 3 | 58.7°F | 58.2°F | 58.2°F |
| Sep 4 | 58.7°F | 58.0°F | 58.3°F |
| Sep 5 | 58.8°F | 58.0°F | 57.4°F |
| Sep 6 | 58.7°F | 57.7°F | 57.5°F |
| Sep 7 | 58.8°F | 57.3°F | 58.0°F |
| Sep 8 | 58.9°F | 57.1°F | 58.2°F |
| Sep 9 | 58.9°F | 57.4°F | 58.6°F |
| Sep 10 | 59.1°F | 57.2°F | 59.0°F |
| Sep 11 | 59.2°F | 57.8°F | 58.8°F |
| Sep 12 | 59.1°F | 58.0°F | 58.5°F |
| Sep 13 | 58.9°F | 57.3°F | 58.3°F |
| Sep 14 | 59.2°F | 57.5°F | 58.7°F |
| Sep 15 | 59.2°F | 57.1°F | 58.4°F |
| Sep 16 | 59.4°F | 58.4°F | 58.6°F |
| Sep 17 | 59.5°F | 58.2°F | 58.8°F |
| Sep 18 | 59.3°F | 57.7°F | 57.5°F |
| Sep 19 | 59.4°F | 57.6°F | 59.1°F |
| Sep 20 | 59.5°F | 58.1°F | 58.9°F |
| Sep 21 | 59.5°F | 58.0°F | 59.5°F |
| Sep 22 | 59.6°F | 58.0°F | 59.3°F |
| Sep 23 | 59.8°F | 57.3°F | 60.3°F |
| Sep 24 | 59.7°F | 58.5°F | 60.4°F |
| Sep 25 | 59.8°F | 58.6°F | 60.5°F |
| Sep 26 | 59.8°F | 58.0°F | 59.2°F |
| Sep 27 | 59.9°F | 58.2°F | 59.3°F |
| Sep 28 | 59.9°F | 59.0°F | 59.6°F |
| Sep 29 | 59.9°F | 58.7°F | 59.7°F |
| Sep 30 | 60.0°F | 59.1°F | 60.3°F |
In an average year, Hermanus offers no days when the water temperature is warm enough to swim comfortably.
The warmest water in Hermanus was recorded on January 12, 2025, reaching a 70.8°F. While the coldest temperature occurred on April 15, 2024, dipping to 51.4°F. The average readings by season are 65.1°F in Winter, 60.8°F in Spring, 59.2°F in Summer, and 60.7°F in Autumn.
The average temperature in September is slightly warmer than August's average of 58.5°F. And in October, the temperature is expected to rise further, potentially reaching an average of 60.7°F.