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 21.4°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 |
|---|---|---|---|
| SEP 13 | 23.2°C | 19.4°C | |
| SEP 14 | 23.1°C | 19.4°C | |
| SEP 15 | 23.0°C | 19.4°C | |
| SEP 16 | 22.7°C | 19.4°C | |
| SEP 17 | 22.4°C | 19.4°C | |
| SEP 18 | 22.4°C | 19.4°C | |
| SEP 19 | 22.3°C | 19.4°C | |
| SEP 20 | 21.5°C | 19.4°C | |
| SEP 21 | 19.4°C | 21.3°C | |
| SEP 22 | 19.4°C | 21.2°C | |
| SEP 23 | 19.4°C | 21.1°C | |
| SEP 24 | 19.4°C | 21.0°C | |
| SEP 25 | 19.4°C | 20.9°C | |
| SEP 26 | 19.4°C | 20.8°C | |
| SEP 27 | 19.4°C | 20.7°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 | 28°C |
| September | 14°C | 19°C | 25°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
September 21
September 22
September 23
September 24
September 25
September 26
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.