Hornavan Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Hornavan Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Hornavan Lake today is 6.7°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
❌ As of today, the minimum water temperature ranges from 41°F (5°C) to 47°F (8°C). This water temperature is still quite low, and swimming in such conditions may only be comfortable for hardened individuals. It is recommended to limit the time spent in the water to avoid hypothermia. For those not accustomed to cold water, it is better to refrain from swimming. However, if you decide to enter the water, it is advisable to wear a warm wetsuit for protection against the cold. 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 | 9.0°C | 11.0°C | |
| SEP 14 | 8.7°C | 11.0°C | |
| SEP 15 | 8.7°C | 11.0°C | |
| SEP 16 | 8.4°C | 11.0°C | |
| SEP 17 | 7.9°C | 11.0°C | |
| SEP 18 | 7.9°C | 11.0°C | |
| SEP 19 | 7.6°C | 11.0°C | |
| SEP 20 | 7.0°C | 11.0°C | |
| SEP 21 | 11.0°C | 6.9°C | |
| SEP 22 | 11.0°C | 7.1°C | |
| SEP 23 | 11.0°C | 7.3°C | |
| SEP 24 | 11.0°C | 7.6°C | |
| SEP 25 | 11.0°C | 7.8°C | |
| SEP 26 | 11.0°C | 8.0°C | |
| SEP 27 | 11.0°C | 8.2°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 | 2°C |
| February | 0°C | 2°C | 2°C |
| March | 0°C | 2°C | 3°C |
| April | 0°C | 0°C | 4°C |
| May | 0°C | 5°C | 10°C |
| June | 9°C | 14°C | 20°C |
| July | 12°C | 18°C | 23°C |
| August | 10°C | 15°C | 21°C |
| September | 6°C | 11°C | 17°C |
| October | 0°C | 4°C | 7°C |
| November | 0°C | 0°C | 4°C |
| December | 0°C | 2°C | 2°C |
Hornavan Lake: Water Temperature by Location
Hornavan Lake: Weather Forecast
September 21
September 22
September 23
September 24
September 25
September 26
Location & Local Information
Hornavan (Swedish: Hornavan) is a large, deep lake in Norrbotten County whose water temperatures reflect its subarctic location and great depth. Surface temperatures in summer typically range from about 10–20 °C (50–68 °F), with ordinary summer afternoons most often between 12–18 °C (54–64 °F). During spring and early summer, as ice melts, surface values are commonly in the 1–8 °C range (34–46 °F). In autumn the surface cools to roughly 4–10 °C (39–50 °F). Because Hornavan is very deep, bottom waters remain near 4 °C (39 °F) year-round, so overall the lake stays cold compared with more southerly Swedish lakes.
Swimming in Hornavan is possible but seasonal and conditions-dependent. In practice people swim primarily in the brief summer months when surface temperatures are highest, while organized bathing areas are less common than in more populated regions. Ice cover and very low water temperatures for much of the year make winter swimming dangerous unless undertaken with proper cold-water experience and safety measures. Water quality is generally good, but anyone considering swimming should respect local signage, the short bathing season, and the risks posed by cold, deep water and sudden weather changes.