Hallevannet — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Hallevannet, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Hallevannet today is 18.6°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
⚠️ As of today, the minimum water temperature ranges from 65°F (18°C) to 68°F (20°C). This is already quite warm water, which is ideal for most people. Swimming becomes comfortable, and prolonged stays in the water do not cause discomfort. This temperature is perfect for family trips and for those who prefer warmer water. It is also comfortable for water sports such as surfing or swimming. 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 |
|---|---|---|---|
| AUG 4 | 18.9°C | 22.0°C | |
| AUG 5 | 18.9°C | 22.0°C | |
| AUG 6 | 18.5°C | 22.0°C | |
| AUG 7 | 18.5°C | 22.0°C | |
| AUG 8 | 18.5°C | 22.0°C | |
| AUG 9 | 18.6°C | 22.0°C | |
| AUG 10 | 18.6°C | 22.0°C | |
| AUG 11 | 18.6°C | 22.0°C | |
| AUG 12 | 22.0°C | 18.8°C | |
| AUG 13 | 22.0°C | 18.9°C | |
| AUG 14 | 22.0°C | 19.1°C | |
| AUG 15 | 22.0°C | 19.3°C | |
| AUG 16 | 22.0°C | 19.5°C | |
| AUG 17 | 22.0°C | 19.6°C | |
| AUG 18 | 22.0°C | 19.8°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 | 3°C | 7°C | 11°C |
| May | 7°C | 12°C | 18°C |
| June | 11°C | 18°C | 24°C |
| July | 16°C | 22°C | 27°C |
| August | 17°C | 22°C | 27°C |
| September | 12°C | 18°C | 23°C |
| October | 7°C | 11°C | 14°C |
| November | 3°C | 7°C | 10°C |
| December | 0°C | 4°C | 7°C |
Hallevannet: Water Temperature by Location
Hallevannet: Weather Forecast
August 11
August 12
August 13
August 14
Location & Local Information
Hallevannet, a lake in Vestfold County, Norway, typically follows the temperature patterns of small southern Norwegian lakes. In winter the surface normally cools to around 0–4 °C (32–39 °F) and can freeze over some years. During spring temperatures rise from roughly 3–12 °C (37–54 °F) as the ice melts and the water stratifies. Summer water temperatures commonly range from about 12–22 °C (54–72 °F), with shallow bays occasionally reaching 23–25 °C (73–77 °F) in unusually warm spells. In autumn the lake cools again to roughly 6–14 °C (43–57 °F) as air temperatures fall and mixing increases.
Swimming in Hallevannet is generally allowed because Norway’s public right of access (allemannsretten) permits bathing in most natural waters, and local residents often use lakes for recreational swimming in summer. Whether it is suitable at any given time depends on water quality, weather and safety conditions; there are typically no lifeguards, and some shorelines may be steep or rocky. Early- and late-season swims carry a risk of cold shock when temperatures are low, so caution is advised. Visitors should observe local signage, avoid private property where restricted, and consider checking local water quality reports before swimming.