Swimming in Sundsvall in september 2025: Average sea temperature in september and tide times in september 2025
Average sea temperature in Sundsvall in september 2025.
In september, according to seasonal norms, the sea temperature in Sundsvall is:
Minimum: 47°F
Average: 56°F
Maximum: 64°F
Other useful seasonal weather averages in september:
- Outside temperature: 49°F to 58°F
- Most common weather: "Partly Cloudy"
- The wind blows at 5mph
- It rains a total of 2.8in, over 4 day(s).
Should we swim in Sundsvall in september?
No... The water temperature in Sundsvall in september is freezing
You won't be able to swim in Sundsvall in september! The water temperature is freezing, reaching as low as 47°F (and only 64°F at best)! Our advice: if you are going to Sundsvall 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, 2.8in of precipitation (over 4 days) and 85.47 % humidity.
Water and normal seasonal temperatures in Sundsvall in september
| September | |||
| Average sea temperature | 56°F | ||
| Minimum sea temperature | 47°F | ||
| Maximum sea temperature | 64°F | ||
| Average outside temperature | 54°F | ||
| Maximum outside temperature | 58°F | ||
| Minimum outside temperature | 50°F | ||
| Wind speed | 9.3mph | ||
| Wind temperature | 47°F | ||
| Precipitation | 2.8in | ||
| Number of days of rain | 4 jour(s) (14%) | ||
| Humidity | 86% | ||
| Visibility in kilometers | 8.34km | ||
| Cloud cover | 50% | ||
| Our opinion | freezing swimming |
Chart of the tides in september 2025
Tide times in september 2025 in Sundsvall
Swim elsewhere in Sweden in september
| City | Average T° | Min. T° | Max. T° | Our opinion | Stockholm in september | 59°F | 67°F | freezing swimming | Gothenburg in september | 61°F | 66°F | cold swimming | Gävle in september | 58°F | 64°F | freezing swimming | Gotland in september | 61°F | 68°F | cold swimming | Malmo in september | 62°F | 68°F | cold swimming | Sandhamn in september | 59°F | 67°F | freezing swimming | Helsingborg in september | 62°F | 67°F | cold swimming |