Swimming in Trondheim in september 2025: Average sea temperature in september and tide times in september 2025
Average sea temperature in Trondheim in september 2025.
In september, according to seasonal norms, the sea temperature in Trondheim is:
Minimum: 53°F
Average: 56°F
Maximum: 61°F
Other useful seasonal weather averages in september:
- Outside temperature: 47°F to 58°F
- Most common weather: "Clear/Sunny"
- The wind blows at 4.4mph
- It rains a total of 4.8in, over 8 day(s).
Should we swim in Trondheim in september?
No... The water temperature in Trondheim in september is freezing
You won't be able to swim in Trondheim in september! The water temperature is freezing, reaching as low as 53°F (and only 61°F at best)! Our advice: if you are going to Trondheim this month, plan to sightsee and forget the beach!
Note also that in september, the climate is tolerable with an average outside temperature of 53°F, 4.8in of precipitation (over 8 days) and 86.9 % humidity.
Water and normal seasonal temperatures in Trondheim in september
| September | |||
| Average sea temperature | 56°F | ||
| Minimum sea temperature | 53°F | ||
| Maximum sea temperature | 61°F | ||
| Average outside temperature | 54°F | ||
| Maximum outside temperature | 59°F | ||
| Minimum outside temperature | 49°F | ||
| Wind speed | 8.7mph | ||
| Wind temperature | 45°F | ||
| Precipitation | 4.8in | ||
| Number of days of rain | 8 jour(s) (25%) | ||
| Humidity | 87% | ||
| Visibility in kilometers | 8.82km | ||
| Cloud cover | 54% | ||
| Our opinion | freezing swimming |
Chart of the tides in september 2025
Tide times in september 2025 in Trondheim
Swim elsewhere in Norway in september
| City | Average T° | Min. T° | Max. T° | Our opinion | Oslo in september | 60°F | 65°F | cold swimming | Bergen in september | 59°F | 64°F | freezing swimming | Lofoten in september | 52°F | 55°F | freezing swimming | Stavanger in september | 59°F | 65°F | cold swimming | Ålesund in september | 57°F | 62°F | freezing swimming | Bodø in september | 53°F | 56°F | freezing swimming | Flekkefjord in september | 60°F | 65°F | cold swimming | Kristiansand in september | 61°F | 65°F | cold swimming | Narvik in september | 52°F | 56°F | freezing swimming | Rorvik in september | 55°F | 59°F | freezing swimming | Sandefjord in september | 61°F | 65°F | cold swimming | Steinkjer in september | 56°F | 60°F | freezing swimming |