Tämnaren Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Tämnaren Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Tämnaren Lake today is 12.4°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 | 14.3°C | 17.0°C | |
| SEP 14 | 14.1°C | 17.0°C | |
| SEP 15 | 13.8°C | 17.0°C | |
| SEP 16 | 13.6°C | 17.0°C | |
| SEP 17 | 13.5°C | 17.0°C | |
| SEP 18 | 13.0°C | 17.0°C | |
| SEP 19 | 12.8°C | 17.0°C | |
| SEP 20 | 12.6°C | 17.0°C | |
| SEP 21 | 17.0°C | 12.6°C | |
| SEP 22 | 17.0°C | 12.9°C | |
| SEP 23 | 17.0°C | 13.1°C | |
| SEP 24 | 17.0°C | 13.3°C | |
| SEP 25 | 17.0°C | 13.6°C | |
| SEP 26 | 17.0°C | 13.8°C | |
| SEP 27 | 17.0°C | 14.0°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 | 2°C | 5°C |
| February | 0°C | 2°C | 5°C |
| March | 0°C | 3°C | 6°C |
| April | 1°C | 5°C | 8°C |
| May | 6°C | 11°C | 17°C |
| June | 12°C | 18°C | 23°C |
| July | 13°C | 19°C | 24°C |
| August | 14°C | 20°C | 25°C |
| September | 11°C | 17°C | 22°C |
| October | 5°C | 9°C | 12°C |
| November | 1°C | 5°C | 8°C |
| December | 0°C | 3°C | 6°C |
Tämnaren Lake: Water Temperature by Location
Tämnaren Lake: Weather Forecast
September 21
September 22
September 23
September 24
September 25
September 26
Location & Local Information
Lake Tämnaren in Uppsala County typically follows the seasonal temperature patterns of inland Swedish lakes. In winter the surface is often close to freezing, about 0–4 °C (32–39 °F), especially where ice forms. Spring warming brings temperatures into roughly 2–12 °C (36–54 °F) as the water stratifies. Summer surface values commonly range from about 16–24 °C (61–75 °F) on warm days, though short heat waves can push the shallow near-shore water slightly higher. In autumn the lake cools again, with surface temperatures generally between 8–16 °C (46–61 °F) as turnover and winds mix the water. Actual temperatures vary with weather, depth and location around the lake, so readings at a shallow beach will differ from deeper basins.
Swimming in Tämnaren is generally possible and commonly practiced in the warmer months; Sweden’s public access tradition (allemansrätten) means many shores are reachable for swimming, but some properties or designated areas may be private or signed. There are usually no permanent lifeguards, so visitors should judge conditions, water temperature and their own abilities before entering. Winter ice swimming is done by some locals where ice is safely thick and cleared, but it requires experience and safety measures. Always observe local signage and respect private land.