Tyrifjorden — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Tyrifjorden, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Tyrifjorden 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 14 | 13.1°C | 17.0°C | |
| SEP 15 | 13.6°C | 17.0°C | |
| SEP 16 | 13.4°C | 17.0°C | |
| SEP 17 | 13.1°C | 17.0°C | |
| SEP 18 | 12.9°C | 17.0°C | |
| SEP 19 | 12.8°C | 17.0°C | |
| SEP 20 | 12.6°C | 17.0°C | |
| SEP 22 | 17.0°C | 12.6°C | |
| SEP 23 | 17.0°C | 12.9°C | |
| SEP 24 | 17.0°C | 13.1°C | |
| SEP 25 | 17.0°C | 13.3°C | |
| SEP 26 | 17.0°C | 13.6°C | |
| SEP 27 | 17.0°C | 13.8°C | |
| SEP 28 | 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 | 10°C | 17°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 |
Tyrifjorden: Water Temperature by Location
Tyrifjorden: Weather Forecast
September 21
September 22
September 23
September 24
September 25
September 26
Location & Local Information
Tyrifjorden in Buskerud County, Norway is a large inland lake where surface water temperatures vary considerably through the year. In winter the lake is usually near freezing, about 0–2 °C (32–36 °F) and can develop ice cover in cold periods. Spring temperatures typically rise to roughly 2–8 °C (36–46 °F) as the ice melts and the water mixes. By early summer surface temperatures commonly reach 10–16 °C (50–61 °F), with the warmest months of July and August often giving 16–22 °C (61–72 °F) in open areas and occasionally a little higher in shallow, sheltered bays (around 23 °C / 73 °F). In autumn the water cools again, generally falling into the 6–12 °C (43–54 °F) range before winter freeze.
Swimming in Tyrifjorden is permitted and popular in summer where public beaches, piers and boat ramps provide access. There are no general prohibitions against swimming, but conditions vary: colder temperatures outside peak months increase risk of cold-water shock, and boat traffic, sudden depth changes and local water quality can affect safety. Because the lake is large and partly deep, swimmers commonly choose supervised or well-used spots and may use wetsuits in cooler conditions to extend comfortable swimming time.