Södertälje — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Södertälje, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Södertälje today is 14.6°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
⚠️ As of today, the minimum water temperature ranges from 54°F (12°C) to 60°F (15°C). The water is significantly warmer, and swimming becomes possible for most people. However, caution may still be required for prolonged stays in the water, as extended exposure can cause discomfort. This is a suitable temperature range for short swims and for those accustomed to cooler water. For more comfortable swimming, it is recommended to use proper gear. It is important to note that these swimming tips and recommendations apply only in good weather. When the air temperature is below 68°F (20°C), and sometimes even below 77°F (25°C), swimming can be unpleasant even with relatively high water temperatures.
Water Temperature Chart Over the Last 30 Days
Table of Daily Sea Temperature Data
| Date | Current | Average | Forecast |
|---|---|---|---|
| SEP 13 | 16.1°C | 17.0°C | |
| SEP 14 | 15.9°C | 17.0°C | |
| SEP 15 | 15.8°C | 17.0°C | |
| SEP 16 | 15.7°C | 17.0°C | |
| SEP 17 | 15.5°C | 17.0°C | |
| SEP 18 | 15.1°C | 17.0°C | |
| SEP 19 | 14.9°C | 17.0°C | |
| SEP 20 | 14.8°C | 17.0°C | |
| SEP 21 | 17.0°C | 14.7°C | |
| SEP 22 | 17.0°C | 14.8°C | |
| SEP 23 | 17.0°C | 15.0°C | |
| SEP 24 | 17.0°C | 15.1°C | |
| SEP 25 | 17.0°C | 15.2°C | |
| SEP 26 | 17.0°C | 15.3°C | |
| SEP 27 | 17.0°C | 15.4°C |
* Current - Actual water temperature value
** Average - Average water temperature on this day in recent years
*** Forecast - Our water temperature forecast
Actual nearshore water temperatures may fluctuate by several degrees from the reported values, especially following heavy rainfall or extended periods of strong winds. Certain wind patterns can cause colder, deeper waters to rise and replace the sun-warmed surface water, leading to noticeable variations.
Our forecast is based on a proprietary mathematical model that considers real-time water temperature changes, historical trends, key weather patterns, wind strength and direction, and air temperature specific to each region. Additionally, we incorporate data from other resorts to enhance accuracy.
Monthly Water Temperature Range (Min, Max & Average)
| Month | Min | Avg | Max |
|---|---|---|---|
| January | 0°C | 3°C | 6°C |
| February | 0°C | 3°C | 6°C |
| March | 0°C | 4°C | 7°C |
| April | 4°C | 8°C | 11°C |
| May | 7°C | 12°C | 17°C |
| June | 12°C | 18°C | 23°C |
| July | 15°C | 21°C | 26°C |
| August | 16°C | 21°C | 26°C |
| September | 12°C | 17°C | 22°C |
| October | 7°C | 11°C | 14°C |
| November | 3°C | 7°C | 10°C |
| December | 0°C | 4°C | 7°C |
Södertälje: Weather Forecast
September 21
September 22
September 23
September 24
September 25
September 26
Location & Local Information
Södertälje, in Stockholm County, lies on the shores of Lake Mälaren and is traversed by rivers and the Södertälje Canal, and these inland waters show marked seasonal variation in temperature. In spring surface temperatures commonly rise from about 4–12 °C (39–54 °F) as the ice melts and the sun warms shallow bays. Through summer many sheltered parts of Mälaren and smaller lakes reach roughly 18–22 °C (64–72 °F), and during warm spells shallow bays can climb to 24–25 °C (75–77 °F). Rivers and the more open, flowing stretches of the canal are usually a few degrees cooler than sheltered lake bays, often ranging from the single digits in early spring to the mid teens or low twenties °C (40s–60s °F) in summer. In autumn temperatures fall back through the teens to around 10–15 °C (50–59 °F) before approaching freezing in winter.
Swimming in lakes and rivers around Södertälje is generally allowed and commonly practiced at municipal bathing sites and informal spots, thanks to public access rights and established bathing areas. Local authorities monitor water quality and post advisories for algal blooms or pollution, so swimmers should heed signage and official updates. Cold-water and ice swimming also occur but require appropriate safety measures and confirmed ice thickness. Currents in the canal and variable visibility in rivers make choosing designated beaches safer than open-channel swimming.