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Mljet Lakes — Current Water Temperature, Annual Trends and Forecast

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

Mljet Lakes, Croatia
Mljet Lakes, Croatia © Autor August Dominus, CC BY-SA 3.0

Current Water Temperature

23.9°C
Today
23.0°C
Yesterday
22.1°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 Mljet Lakes today is 23.9°C.

Water Temperature: Daily Trends, Historical Records, and Forecast

✅ As of today, the minimum water temperature ranges from 75°F (23°C) to 79°F (26°C). This is a very comfortable temperature for swimming, and many people can enjoy prolonged stays in the water without feeling cold. The water is pleasantly warm, making it ideal for relaxation and water sports. This temperature range is particularly popular among tourists, as it combines comfort and safety for health. 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 30 to June 30

Table of Daily Sea Temperature Data

Date Current Average Forecast
JUN 2322.1°C22.0°C
JUN 2422.2°C22.0°C
JUN 2522.6°C22.0°C
JUN 2622.6°C22.0°C
JUN 2722.1°C22.0°C
JUN 2822.9°C22.0°C
JUN 2923.0°C22.0°C
JUN 3023.3°C22.0°C
JUL 125.0°C24.0°C
JUL 225.0°C24.0°C
JUL 325.0°C24.1°C
JUL 425.0°C24.1°C
JUL 525.0°C24.2°C
JUL 625.0°C24.2°C
JUL 725.0°C24.3°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
January7°C11°C14°C
February7°C11°C14°C
March9°C13°C17°C
April10°C15°C19°C
May13°C19°C24°C
June17°C22°C27°C
July20°C25°C30°C
August20°C25°C30°C
September17°C22°C27°C
October14°C19°C22°C
November10°C14°C18°C
December7°C11°C14°C

Mljet Lakes: Water Temperature by Location

Mljet Lakes: Weather Forecast

July 1

° / °
overcast
rain: 30% | wind:

July 2

° / °
slight rain showers
rain: 49% | wind:

July 3

° / °
overcast
rain: 8% | wind:

July 4

° / °
mainly clear
rain: 5% | wind:

July 5

° / °
mainly clear
rain: 5% | wind:

Location & Local Information

The lakes on the island of Mljet, particularly Veliko and Malo jezero, are among the most remarkable natural attractions of southern Croatia. Due to their enclosed position and connection to the sea through narrow channels, the water in these lakes warms up faster than the open Adriatic. In summer, the temperature often reaches 25–28 °C, sometimes even warmer than the sea itself, which makes them especially inviting for swimming.

Swimming in the Mljet lakes is a unique experience because of their calm waters and stunning natural surroundings. The saltwater lakes are surrounded by dense Mediterranean forest, creating a peaceful and almost lagoon-like atmosphere. Visitors can enjoy not only swimming but also kayaking or leisurely walks along the shores, making the lakes a perfect combination of recreation and relaxation.

Nearby Lakes

Frequently Asked Questions

What is the current water temperature in Mljet Lakes?
Water Temperature in Mljet Lakes today is 23.9°C.
What is the water temperature in Mljet Lakes during the summer months?
The water temperature in Mljet Lakes in summer fluctuates in the range of 17°C - 30°C.
Is it possible to swim in Mljet lakes (Croatia) and what are the possibilities for this?
You can swim in Mljet’s saltwater lakes—Veliko and Malo Jezero—enjoying open-lake swims around the islet with the monastery, sheltered coves and the narrow sea channel, and combining swimming with kayaking or snorkeling, though some parts of the national park are protected and may have landing or activity restrictions.