Hillestadvannet — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Hillestadvannet, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Hillestadvannet 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 | 19.0°C | 22.0°C | |
| AUG 5 | 19.0°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 | 2°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 |
Hillestadvannet: Water Temperature by Location
Hillestadvannet: Weather Forecast
August 12
August 13
August 14
Location & Local Information
Hillestadvannet in Vestfold County, Norway is a modest freshwater lake that follows typical seasonal temperature patterns for the region. In spring (April–May) surface temperatures commonly rise from about 4–12 °C (39–54 °F) as ice recedes and sun exposure increases. Summer (June–August) brings the warmest conditions, with daytime surface temperatures generally ranging from roughly 15–22 °C (59–72 °F) and occasionally reaching around 23 °C (73 °F) during heatwaves. In autumn (September–November) the water cools again to approximately 4–10 °C (39–50 °F), and in winter (December–March) temperatures near the surface are often around 0–4 °C (32–39 °F), with parts of the lake liable to freeze during extended cold spells.
Swimming in Hillestadvannet is commonly practiced and generally allowed under Norway’s public access traditions; there are no broad prohibitions on entering the water unless local signs or private-property restrictions indicate otherwise. Summer months offer the most comfortable and safest conditions for casual bathing, while spring, autumn and winter bring cold-water risks that require caution. Water quality and shore conditions can vary seasonally, and there are typically no lifeguards, so swimmers should judge conditions locally, heed posted notices, and take normal precautions for cold-water immersion and boat traffic.