Trollhättan — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Trollhättan, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Trollhättan today is 13.8°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 | 14.6°C | 16.0°C | |
| SEP 14 | 14.9°C | 16.0°C | |
| SEP 15 | 14.9°C | 16.0°C | |
| SEP 16 | 14.8°C | 16.0°C | |
| SEP 17 | 14.9°C | 16.0°C | |
| SEP 18 | 14.2°C | 16.0°C | |
| SEP 19 | 14.2°C | 16.0°C | |
| SEP 20 | 14.0°C | 16.0°C | |
| SEP 21 | 16.0°C | 13.9°C | |
| SEP 22 | 16.0°C | 14.0°C | |
| SEP 23 | 16.0°C | 14.1°C | |
| SEP 24 | 16.0°C | 14.2°C | |
| SEP 25 | 16.0°C | 14.4°C | |
| SEP 26 | 16.0°C | 14.5°C | |
| SEP 27 | 16.0°C | 14.6°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 | 8°C | 13°C | 18°C |
| June | 13°C | 18°C | 23°C |
| July | 15°C | 20°C | 25°C |
| August | 14°C | 19°C | 24°C |
| September | 11°C | 16°C | 21°C |
| October | 6°C | 10°C | 13°C |
| November | 3°C | 7°C | 10°C |
| December | 0°C | 4°C | 7°C |
Trollhättan: Weather Forecast
September 21
September 22
September 23
September 24
September 25
September 26
Location & Local Information
Trollhättan sits on the Göta älv and close to Sweden’s inland lakes, so most local bathing takes place in rivers and freshwater lakes rather than the sea. Typical summer water temperatures in calm lakes near Trollhättan range from about 17–22 °C (63–72 °F), peaking in July–August. The Göta älv itself is often a few degrees cooler and more variable, commonly 15–20 °C (59–68 °F) in summer but subject to rapid changes because of flow, depth and upstream releases. In spring (April–June) temperatures are usually 4–12 °C (39–54 °F), in autumn (September–October) 10–16 °C (50–61 °F), and in winter inland waters approach freezing, roughly 0–4 °C (32–39 °F), with ice cover possible on sheltered lakes.
Swimming is generally allowed at marked beaches and public bathing spots in and around Trollhättan, where water quality is monitored and facilities are provided. However, swimming is discouraged or prohibited in shipping channels, near locks and industrial installations, and in fast-moving stretches of the Göta älv because of strong currents, sudden depth changes and boat traffic. Warm summers can bring algal blooms in shallow bays, so local advisories should be followed for safety and hygiene.