Karlovo — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Karlovo, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Karlovo today is 20.5°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature ranges from 68°F (20°C) to 74°F (23°C). The water is warm and pleasant for swimming, and in this range, one can stay in the water for extended periods without the risk of hypothermia. This is the ideal temperature for relaxation, swimming, and water sports. Families with children, as well as outdoor enthusiasts, will enjoy swimming and time spent in the water. For most people, this is the optimal temperature for a comfortable beach experience. 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 |
|---|---|---|---|
| JUN 3 | 20.0°C | 19.0°C | |
| JUN 4 | 20.0°C | 19.0°C | |
| JUN 5 | 20.0°C | 19.0°C | |
| JUN 6 | 20.3°C | 19.0°C | |
| JUN 7 | 19.9°C | 19.0°C | |
| JUN 8 | 19.9°C | 19.0°C | |
| JUN 10 | 20.5°C | 19.0°C | |
| JUN 11 | 19.0°C | 20.4°C | |
| JUN 12 | 19.0°C | 20.4°C | |
| JUN 13 | 19.0°C | 20.3°C | |
| JUN 14 | 19.0°C | 20.2°C | |
| JUN 15 | 19.0°C | 20.1°C | |
| JUN 16 | 19.0°C | 20.1°C | |
| JUN 17 | 19.0°C | 20.0°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 | 2°C | 7°C | 12°C |
| February | 3°C | 8°C | 12°C |
| March | 4°C | 9°C | 14°C |
| April | 9°C | 13°C | 16°C |
| May | 10°C | 16°C | 21°C |
| June | 14°C | 19°C | 24°C |
| July | 17°C | 22°C | 27°C |
| August | 17°C | 22°C | 27°C |
| September | 14°C | 19°C | 24°C |
| October | 12°C | 16°C | 19°C |
| November | 8°C | 12°C | 15°C |
| December | 3°C | 8°C | 12°C |
Karlovo: Weather Forecast
June 9
June 10
June 11
June 12
June 13
Location & Local Information
Karlovo sits in a inland valley with the shallow Karlovska River running through town and a handful of nearby reservoirs and ponds; larger impoundments in the region (for example the Koprinka area, a short drive away) behave like typical continental inland waters. Seasonal surface temperatures in rivers and small lakes around Karlovo generally range from near freezing in winter—about 0–6 °C (32–43 °F)—to spring values of roughly 6–15 °C (43–59 °F) as runoff decreases. In summer, sheltered shallow stretches and small reservoirs commonly warm to roughly 18–26 °C (64–79 °F), while deeper or spring-fed mountain tributaries remain cooler, often in the 8–16 °C (46–61 °F) band. Autumn sees a steady decline back toward 10–18 °C (50–64 °F) before winter icing or near-freezing flows return.
Swimming is practiced locally in warm months but formal, lifeguarded inland beaches are limited, so most bathing is informal. Whether swimming is allowed depends on location and management: calm reservoir coves and slow river bends are used in summer because temperatures become comfortable, but risks include cold shocks in early/late season, variable water quality, hidden debris, and currents or boat traffic on some reservoirs. For safety and legality, check local signs and authorities before entering the water and prefer supervised or clearly designated bathing spots.