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Troyan — Current Water Temperature, Annual Trends and Forecast

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

Osam River, Bulgaria
Osam River, Bulgaria © By Edal Anton Lefterov, CC BY-SA 3.0

Current Water Temperature

25.5°C
Today
25.5°C
Yesterday
21.2°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 Troyan today is 25.5°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 June 21 to July 22

Table of Daily Sea Temperature Data

Date Current Average Forecast
JUL 1421.2°C20.8°C
JUL 1523.2°C20.8°C
JUL 1623.6°C20.8°C
JUL 1723.6°C20.8°C
JUL 1823.6°C20.8°C
JUL 1923.9°C20.8°C
JUL 2025.5°C20.8°C
JUL 2125.5°C20.8°C
JUL 2220.8°C25.3°C
JUL 2320.8°C25.0°C
JUL 2420.8°C24.8°C
JUL 2520.8°C24.6°C
JUL 2620.8°C24.3°C
JUL 2720.8°C24.1°C
JUL 2820.8°C23.9°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
January2°C7°C11°C
February3°C7°C11°C
March4°C9°C13°C
April7°C11°C15°C
May8°C14°C19°C
June13°C18°C23°C
July16°C21°C26°C
August16°C20°C25°C
September13°C18°C22°C
October11°C15°C18°C
November7°C11°C14°C
December3°C8°C11°C

Troyan: Weather Forecast

July 22

° / °
moderate rain
rain: 88% | wind:

July 23

° / °
overcast
rain: 0% | wind:

July 24

° / °
slight rain
rain: 93% | wind:

July 25

° / °
overcast
rain: 48% | wind:

July 26

° / °
overcast
rain: 4% | wind:

July 27

° / °
slight thunderstorm
rain: 35% | wind:

Location & Local Information

Troyan, a town in the northern foothills of Bulgaria’s Balkan Mountains, is served by nearby reservoirs and mountain lakes that offer fresh water and scenic spots. Water temperatures around Troyan vary strongly with the seasons: in late spring and early summer (May–June) surface temperatures typically range from about 15–20 °C (59–68 °F), while peak summer (July–August) often brings 20–25 °C (68–77 °F) on warm days. In autumn the water cools to roughly 10–15 °C (50–59 °F), and through winter it can fall near freezing, commonly around 0–5 °C (32–41 °F) in unfrozen stretches. Small, shallow bays warm faster than deep parts of reservoirs, so local readings can differ by several degrees.

Swimming is possible and commonly undertaken in summer when temperatures are pleasant, but it is not uniformly regulated or supervised. Many shorelines allow recreational bathing, yet there are areas where swimming is discouraged or prohibited because of boat traffic, underwater currents near dam structures, water-management operations, or variable water quality. There are few formal lifeguarded beaches, so visitors should heed posted signs, avoid restricted zones, and take usual safety precautions—entering slowly to check temperature, swimming with a companion, and avoiding risky spots near inflows or steep drop-offs.

Nearby Locations

Frequently Asked Questions

What is the current water temperature in Troyan?
Water Temperature in Troyan today is 25.5°C.
What is the water temperature in Troyan during the summer months?
The water temperature in Troyan in summer fluctuates in the range of 13°C - 26°C.
Is it possible to swim in Troyan (Bulgaria) in Osam and what are the possibilities for this?
Yes — during the warmer months you can swim in some calmer stretches and shallow gravel banks of the Osam around Troyan or use local outdoor pools and small reservoirs, but only where water quality, currents, signage and property access make it safe and permitted.