Mostar — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Mostar, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Mostar today is 19.5°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
⚠️ As of today, the minimum water temperature ranges from 65°F (18°C) to 68°F (20°C). This is already quite warm water, which is ideal for most people. Swimming becomes comfortable, and prolonged stays in the water do not cause discomfort. This temperature is perfect for family trips and for those who prefer warmer water. It is also comfortable for water sports such as surfing or swimming. 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 12 | 20.4°C | 18.2°C | |
| SEP 13 | 20.2°C | 18.2°C | |
| SEP 14 | 19.3°C | 18.2°C | |
| SEP 15 | 19.2°C | 18.2°C | |
| SEP 16 | 19.0°C | 18.2°C | |
| SEP 17 | 18.6°C | 18.2°C | |
| SEP 18 | 18.5°C | 18.2°C | |
| SEP 19 | 19.1°C | 18.2°C | |
| SEP 20 | 18.2°C | 19.4°C | |
| SEP 21 | 18.2°C | 19.4°C | |
| SEP 22 | 18.2°C | 19.3°C | |
| SEP 23 | 18.2°C | 19.2°C | |
| SEP 24 | 18.2°C | 19.2°C | |
| SEP 25 | 18.2°C | 19.1°C | |
| SEP 26 | 18.2°C | 19.0°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 | 4°C | 8°C | 10°C |
| February | 4°C | 8°C | 10°C |
| March | 7°C | 10°C | 13°C |
| April | 8°C | 12°C | 16°C |
| May | 9°C | 14°C | 19°C |
| June | 13°C | 18°C | 23°C |
| July | 14°C | 20°C | 26°C |
| August | 15°C | 21°C | 27°C |
| September | 13°C | 18°C | 24°C |
| October | 10°C | 14°C | 17°C |
| November | 6°C | 9°C | 12°C |
| December | 4°C | 8°C | 10°C |
Mostar: Weather Forecast
September 20
September 21
September 22
September 23
September 24
Location & Local Information
Mostar, located in southern Bosnia and Herzegovina, lies on the banks of the Neretva River, one of the country’s most striking and coldest rivers. Originating in the Dinaric Alps, the Neretva carries fresh, turquoise water that remains cool even during the hottest months. In winter, the river’s temperature averages 4–7°C, rising in spring to around 10–13°C. During summer, particularly in July and August, it reaches 18–21°C near Mostar, while deeper currents remain colder. In autumn, the water gradually cools again to about 10–15°C.
Swimming in the Neretva River is possible but demanding because of its low temperature and strong currents. Locals and visitors often swim in designated areas near the Old Bridge and along calmer banks downstream. The water is exceptionally clean and refreshing, offering a unique experience for strong swimmers accustomed to cold mountain water. Many also enjoy jumping from the Old Bridge, a tradition linked to courage and local culture. However, due to the coldness of the river and uneven currents, swimming is safest during warm summer days and in monitored areas.