Hasselasjön — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Hasselasjön, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Hasselasjön today is 11.8°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
❌ As of today, the minimum water temperature ranges from 50°F (10°C) to 54°F (12°C). The water is slightly warmer, but still cool for most people. Swimming in such conditions is possible, but for most people, the time spent in the water should be limited to avoid hypothermia. Even experienced swimmers may feel discomfort if they stay in the water for too long. To improve comfort and safety, a wetsuit can be used. 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 | 13.3°C | 15.0°C | |
| SEP 14 | 13.2°C | 15.0°C | |
| SEP 15 | 13.5°C | 15.0°C | |
| SEP 16 | 12.8°C | 15.0°C | |
| SEP 17 | 12.6°C | 15.0°C | |
| SEP 18 | 12.4°C | 15.0°C | |
| SEP 19 | 12.3°C | 15.0°C | |
| SEP 20 | 12.0°C | 15.0°C | |
| SEP 21 | 15.0°C | 12.0°C | |
| SEP 22 | 15.0°C | 12.1°C | |
| SEP 23 | 15.0°C | 12.3°C | |
| SEP 24 | 15.0°C | 12.4°C | |
| SEP 25 | 15.0°C | 12.6°C | |
| SEP 26 | 15.0°C | 12.8°C | |
| SEP 27 | 15.0°C | 12.9°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 | 2°C | 5°C |
| April | 0°C | 3°C | 7°C |
| May | 6°C | 12°C | 18°C |
| June | 11°C | 17°C | 22°C |
| July | 14°C | 20°C | 25°C |
| August | 14°C | 20°C | 25°C |
| September | 10°C | 15°C | 21°C |
| October | 4°C | 8°C | 11°C |
| November | 2°C | 6°C | 9°C |
| December | 0°C | 2°C | 5°C |
Hasselasjön: Water Temperature by Location
Hasselasjön: Weather Forecast
September 21
September 22
September 23
September 24
September 25
September 26
Location & Local Information
Hasselasjön, located in Gävleborg County, typically shows marked seasonal variation in water temperature. In spring the surface waters commonly rise from about 2–12 °C (36–54 °F) as thaw and snowmelt progress, while summer temperatures often range from roughly 15–22 °C (59–72 °F) in the swimming season, sometimes reaching a few degrees higher in shallow bays on warm late-summer days. In autumn the lake cools to around 8–15 °C (46–59 °F) as air temperatures drop, and in winter the surface usually freezes or approaches 0 °C (32 °F); water beneath ice stays close to 0–2 °C (32–36 °F) depending on depth. Local weather, wind, and the part of the lake (shallow versus deep sections) all influence these averages, so conditions can vary from year to year.
Swimming in Hasselasjön is generally permitted and commonly practised in summer because the shoreline is accessible and the water warms enough for recreational use. Swedish access rights (allemansrätten) and local recreational traditions support public bathing, but specific beaches or piers may be maintained by municipalities or private owners, and water quality is monitored periodically by local authorities. In winter, ice swimming occurs in some places but should only be attempted where ice thickness and safety arrangements are confirmed. As always, swimmers should follow local guidance, observe safety precautions, and check recent water-quality and ice-safety information before entering the water.