Skien — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Skien, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Skien today is 12.2°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 13 | 12.5°C | 15.0°C | |
| SEP 14 | 12.4°C | 15.0°C | |
| SEP 15 | 12.6°C | 15.0°C | |
| SEP 16 | 12.6°C | 15.0°C | |
| SEP 17 | 12.1°C | 15.0°C | |
| SEP 18 | 12.6°C | 15.0°C | |
| SEP 19 | 12.5°C | 15.0°C | |
| SEP 20 | 12.4°C | 15.0°C | |
| SEP 21 | 15.0°C | 12.3°C | |
| SEP 22 | 15.0°C | 12.5°C | |
| SEP 23 | 15.0°C | 12.6°C | |
| SEP 24 | 15.0°C | 12.8°C | |
| SEP 25 | 15.0°C | 12.9°C | |
| SEP 26 | 15.0°C | 13.0°C | |
| SEP 27 | 15.0°C | 13.2°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 | 5°C |
| February | 0°C | 2°C | 5°C |
| March | 0°C | 3°C | 6°C |
| April | 2°C | 6°C | 9°C |
| May | 6°C | 10°C | 15°C |
| June | 10°C | 15°C | 20°C |
| July | 14°C | 18°C | 23°C |
| August | 14°C | 18°C | 23°C |
| September | 10°C | 15°C | 19°C |
| October | 6°C | 9°C | 12°C |
| November | 2°C | 6°C | 9°C |
| December | 0°C | 3°C | 6°C |
Skien: Weather Forecast
September 21
September 22
September 23
September 24
September 25
September 26
Location & Local Information
Skien, in Telemark County, sits by several inland waters, most notably the broad Norsjø lake that is part of the Telemark Canal system. Surface water temperatures in these lakes vary by season: in spring (May–June) you can expect roughly 6–15 °C (43–59 °F) as lakes warm after ice melt, while peak summer (July–August) temperatures commonly range from about 18–24 °C (64–75 °F) in open water and can be higher in shallow, sheltered bays. In early autumn (September–October) temperatures generally fall to around 8–14 °C (46–57 °F). During winter months (December–March) surface temperatures approach freezing, roughly 0–4 °C (32–39 °F), and lakes often freeze over.
Swimming is generally allowed and popular at designated beaches and informal bathing spots along the lake shores and canal, since these waters are used for recreation and tourism. Local rules may restrict swimming near busy boat channels, industrial areas or where water quality warnings are posted. Lifeguards are not common outside main municipal beaches, so swimmers should heed posted signs and seasonal advisories about algae blooms or pollution. Cold-water shock is a risk in shoulder seasons and winter; many people use wetsuits or stick to supervised beach areas during the warmer months for safer conditions.