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Kongsberg — Current Water Temperature, Annual Trends and Forecast

This page provides information on the current water temperature in Kongsberg, trends, monthly ranges and the forecast for the coming days.

Numedalslågen River, Norway
Numedalslågen River, Norway © By Øystein Engen, CC BY-SA 2.5

Current Water Temperature

5.7°C
Today
6.0°C
Yesterday
6.0°C
A Week Ago
Get instant access to real-time water temperatures for this and all other locations with our iOS and Android apps.

Water Temperature in Kongsberg today is 5.7°C.

Water Temperature: Daily Trends, Historical Records, and Forecast

❌ As of today, the minimum water temperature ranges from 41°F (5°C) to 47°F (8°C). This water temperature is still quite low, and swimming in such conditions may only be comfortable for hardened individuals. It is recommended to limit the time spent in the water to avoid hypothermia. For those not accustomed to cold water, it is better to refrain from swimming. However, if you decide to enter the water, it is advisable to wear a warm wetsuit for protection against the cold. 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

From September 30 to October 31

Table of Daily Sea Temperature Data

Date Current Average Forecast
OCT 246.0°C9.0°C
OCT 256.6°C9.0°C
OCT 266.4°C9.0°C
OCT 275.6°C9.0°C
OCT 286.1°C9.0°C
OCT 296.2°C9.0°C
OCT 306.0°C9.0°C
OCT 315.9°C9.0°C
NOV 16.0°C5.7°C
NOV 26.0°C5.7°C
NOV 36.0°C5.7°C
NOV 46.0°C5.8°C
NOV 56.0°C5.8°C
NOV 66.0°C5.8°C
NOV 76.0°C5.8°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
January0°C2°C5°C
February0°C2°C5°C
March0°C3°C6°C
April1°C5°C9°C
May6°C10°C15°C
June10°C15°C20°C
July14°C18°C23°C
August14°C18°C23°C
September10°C15°C19°C
October6°C9°C12°C
November2°C6°C9°C
December0°C3°C6°C

Kongsberg: Weather Forecast

October 31

° / °
fog
rain: 0% | wind:

November 1

° / °
light drizzle
rain: 10% | wind:

November 2

° / °
overcast
rain: 4% | wind:

November 3

° / °
partly cloudy
rain: 0% | wind:

November 4

° / °
fog
rain: 0% | wind:

Location & Local Information

Kongsberg (Norwegian: Kongsberg) in Buskerud County sits among forested hills and inland waters, and local lakes reflect the region’s temperate continental climate. Typical lake temperatures vary a lot by season: in winter many smaller lakes hover around 0–4 °C (32–39 °F) and often freeze over; spring temperatures commonly rise from about 4–12 °C (39–54 °F) as ice melts; summer bathing temperatures in sheltered, shallow lakes are generally in the 14–22 °C range (57–72 °F), with the warmest spots occasionally reaching the low-to-mid 20s °C (73–75 °F) during heat spells; autumn cools again to roughly 6–12 °C (43–54 °F). Exact values depend on depth, shading, and recent weather.

Swimming in lakes around Kongsberg is widely practised and generally allowed under Norway’s public access traditions, but local rules can restrict access at reservoirs, near dams, or on private shorelines. Popular spots and designated swimming areas are used in summer because water temperatures then are comfortable for short swims. Safety considerations — cold shock at low temperatures, absence of lifeguards at many sites, underwater hazards, and boat traffic — mean swimmers should check signage, choose marked beaches where available, and use protective clothing like wetsuits if swimming outside peak summer warmth.

Nearby Locations

Frequently Asked Questions

What is the current water temperature in Kongsberg?
Water Temperature in Kongsberg today is 5.7°C.
What is the water temperature in Kongsberg during the summer months?
The water temperature in Kongsberg in summer fluctuates in the range of 10°C - 23°C.
Is it possible to swim in Kongsberg (Norway) in Numedalslågen and what are the possibilities for this?
Yes — you can swim in Numedalslågen around Kongsberg, especially at calmer stretches, popular river beaches and designated bathing spots (and in nearby lakes), but conditions vary with season and location so be aware of currents, cold water, changing water levels and local safety guidance.