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Unnukka Lake — Current Water Temperature, Annual Trends and Forecast

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

Unnukka Lake, Finland
Unnukka Lake, Finland © By Antti Leppänen, CC BY-SA 3.0

Current Water Temperature

17.3°C
Today
16.5°C
Yesterday
13.0°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 Unnukka Lake today is 17.3°C.

Water Temperature: Daily Trends, Historical Records, and Forecast

⚠️ As of today, the minimum water temperature ranges from 60°F (15°C) to 65°F (18°C). The water is comfortable for most people, making it an ideal range for water sports enthusiasts. The temperature does not cause significant discomfort, and swimming will be pleasant for the majority. However, it's important to remember that prolonged exposure to the water can still lead to cooling, so it's essential to monitor the time spent in the water, especially for children or elderly people. 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 May 10 to June 10

Table of Daily Sea Temperature Data

Date Current Average Forecast
JUN 313.0°C17.0°C
JUN 413.3°C17.0°C
JUN 515.7°C17.0°C
JUN 615.7°C17.0°C
JUN 716.4°C17.0°C
JUN 816.5°C17.0°C
JUN 1017.3°C17.0°C
JUN 1117.0°C17.3°C
JUN 1217.0°C17.3°C
JUN 1317.0°C17.3°C
JUN 1417.0°C17.2°C
JUN 1517.0°C17.2°C
JUN 1617.0°C17.2°C
JUN 1717.0°C17.2°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
January0°C2°C5°C
February0°C2°C5°C
March0°C2°C5°C
April0°C3°C6°C
May5°C12°C18°C
June11°C17°C22°C
July14°C20°C25°C
August14°C20°C25°C
September10°C15°C21°C
October4°C8°C11°C
November2°C6°C9°C
December0°C2°C5°C

Unnukka Lake: Water Temperature by Location

Unnukka Lake: Weather Forecast

June 9

° / °
light drizzle
rain: 41% | wind:

June 10

° / °
dense intensity drizzle
rain: 61% | wind:

June 11

° / °
overcast
rain: 33% | wind:

June 12

° / °
light drizzle
rain: 55% | wind:

June 13

° / °
light drizzle
rain: 31% | wind:

Location & Local Information

Lake Unnukka, located in South Savo in eastern Finland, is part of the Saimaa lake system and lies near the towns of Varkaus and Leppävirta. It is a long and branching lake surrounded by forested hills and rocky shores, with clear and clean water typical of the region. The water temperature in Unnukka changes markedly with the seasons. After the ice melts in late April or early May, the surface temperature is around 4–7 °C (39–45 °F). During early summer, it rises to about 13–16 °C (55–61 °F), and in July, the warmest month, it usually reaches 18–22 °C (64–72 °F). In shallow and sheltered bays, the water can briefly exceed 23 °C (73 °F). By late September, it cools below 10 °C (50 °F), and freezing typically occurs again in November.

Swimming in Lake Unnukka is allowed and widely enjoyed in summer. The water is clean and safe, and many public beaches and natural shores provide easy access for swimming. Calm water and scenic surroundings make the lake a pleasant place for both relaxation and outdoor activities. While the water is cool in spring and autumn, mid-summer conditions are comfortable and refreshing, attracting locals and visitors alike to swim in South Savo’s beautiful natural setting.

Nearby Lakes

Frequently Asked Questions

What is the current water temperature in Unnukka Lake?
Water Temperature in Unnukka Lake today is 17.3°C.
What is the water temperature in Unnukka Lake during the summer months?
The water temperature in Unnukka Lake in summer fluctuates in the range of 11°C - 25°C.
Is it possible to swim in Unnukka (Finland) and what are the possibilities for this?
Yes — you can swim in Lake Unnukka in Finland, with options including bathing from sandy or rocky shores, public beaches, campsite and village swimming areas, piers, boat landings and island spots or from private cottages and boats, though visitors should heed local water‑quality updates, weather and safety guidance.