Fort William in September
Find out everything about the water temperature in Fort William 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:
54.5 °F
Average:
56.1 °F
Maximum:
58.5 °F
Sea water temperature in Fort William in September
In the city of Fort William, the month of September is too cold for swimming. The minimum recorded temperature during this month was 54.5°F on September 21, 2024, with an average temperature being 56.1°F and a maximum temperature reaching 58.5°F on September 7, 2023.
| Date | 10 years average | 2025 | 2024 |
|---|---|---|---|
| Sep 1 | 57.0°F | 57.9°F | 56.7°F |
| Sep 2 | 56.8°F | 57.6°F | 56.4°F |
| Sep 3 | 56.6°F | 57.3°F | 56.2°F |
| Sep 4 | 56.4°F | 57.0°F | 55.9°F |
| Sep 5 | 56.2°F | 56.8°F | 55.3°F |
| Sep 6 | 56.1°F | 56.8°F | 55.0°F |
| Sep 7 | 56.2°F | 56.6°F | 55.6°F |
| Sep 8 | 56.2°F | 56.5°F | 56.4°F |
| Sep 9 | 56.2°F | 56.8°F | 56.2°F |
| Sep 10 | 56.2°F | 56.8°F | 56.0°F |
| Sep 11 | 56.2°F | 57.2°F | 56.0°F |
| Sep 12 | 56.1°F | 57.1°F | 55.9°F |
| Sep 13 | 56.1°F | 57.0°F | 55.8°F |
| Sep 14 | 56.2°F | 56.7°F | 55.8°F |
| Sep 15 | 56.2°F | 56.6°F | 55.8°F |
| Sep 16 | 56.1°F | 56.5°F | 55.7°F |
| Sep 17 | 56.0°F | 56.5°F | 55.7°F |
| Sep 18 | 56.0°F | 56.4°F | 55.1°F |
| Sep 19 | 56.0°F | 56.3°F | 55.6°F |
| Sep 20 | 56.0°F | 56.3°F | 55.4°F |
| Sep 21 | 55.9°F | 56.3°F | 54.5°F |
| Sep 22 | 55.9°F | 56.3°F | 54.6°F |
| Sep 23 | 56.0°F | 56.3°F | 54.8°F |
| Sep 24 | 56.0°F | 56.2°F | 54.9°F |
| Sep 25 | 56.0°F | 56.2°F | 55.0°F |
| Sep 26 | 56.0°F | 55.5°F | 55.1°F |
| Sep 27 | 56.0°F | 55.9°F | 55.2°F |
| Sep 28 | 56.0°F | 55.9°F | 55.3°F |
| Sep 29 | 55.9°F | 55.7°F | 55.3°F |
| Sep 30 | 55.9°F | 55.7°F | 55.3°F |
In an average year, Fort William offers no days when the water temperature is warm enough to swim comfortably.
The warmest water in Fort William was recorded on August 19, 2025, reaching a 59.1°F. While the coldest temperature occurred on March 12, 2016, dipping to 43.3°F. The average readings by season are 47.3°F in Winter, 46.6°F in Spring, 54.8°F in Summer, and 54.6°F in Autumn.
September's average temperature is a slight drop from August's average of 56.7°F. In October, the temperature is expected to decrease further, potentially averaging around 54.9°F.
Popular neighboring cities and resorts
| City | Water temperature* | Distance** |
|---|---|---|
| Alexandria |
45.9°F
|
60mi |
| Dumbarton |
45.9°F
|
64mi |
| Houston |
45.9°F
|
69mi |
* current water temperature in this city
** straight line distance from Fort William