Iskar Reservoir Reservoir

Large reservoir supplying water to Sofia

North of Sofia, the Iskar Reservoir supplies water and hydroelectric power; visitors use its shores for fishing, boating and cycling with views of surrounding hills.

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Address
42.45829, 23.58404
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Iskar Reservoir is a large storage reservoir on the Iskar River to the east-northeast of Sofia, Bulgaria, created by a dam on the river. It functions as an important water supply and river regulation facility for the region.

The reservoir occupies a valley in the foothills of the Balkan mountains and is used for water supply, flood control and local recreation. The dam and reservoir regulate flows on the Iskar River and form a visible landscape feature in the area.

Located within Sofia City Province, the reservoir lies upstream of the capital and is reached by regional roads from Sofia.

  • Primary water supply: Serves as the principal water reservoir and supply source for Sofia and surrounding areas, created by damming the Iskar River.

What to See#

  • Iskar Dam: The main dam structure on the Iskar River that created the reservoir, forming the primary water storage and regulation facility serving downstream flows.

Best Time to Visit Iskar Reservoir#

Late spring through early autumn is the best time to visit the Iskar Reservoir for boating and outdoor recreation.

Summer
June-August · 20-30°C
Warm weather ideal for boating, fishing and picnics; the reservoir area is busiest and most accessible.
Spring/Autumn (Shoulder)
April-May, September-October · 5-20°C
Milder conditions and fewer visitors-good for walking and wildlife viewing along the shore.
Winter
November-March · -5-5°C
Cold, with possible freezing temperatures around Sofia; some outdoor activities may be limited.

Weather & Climate near Iskar Reservoir#

Climate

Iskar Reservoir's climate is classified as Warm-Summer Continental - Warm-Summer Continental climate with mild summers (peaking in July) and freezing winters (coldest in January). Temperatures range from -5°C to 24°C. Moderate rainfall (613 mm/year).

Best Time to Visit
AugustJulySeptember
Temperature & Rainfall
Temperature Range
39°
Warmest Month
-23°
Coldest Month
Monthly Conditions

January

January is the coldest month with highs of 3°C and lows of -5°C. Moderate rainfall (34 mm) and mostly overcast skies.

46 Poor

Comfort

-1°
Feels Like Freezing
-1°C
Temperature
-5° – 3°
88%
Humidity
Very Humid

Weather

34 mm
Rainfall
2.7 m/s
Wind
Calm
0.2
UV Index
Low
9.3h daylight

February

February is freezing with highs of 4°C and lows of -4°C. Moderate rainfall (39 mm) and mostly overcast skies.

48 Poor

Comfort

0°
Feels Like Freezing
0°C
Temperature
-5° – 4°
84%
Humidity
Very Humid

Weather

39 mm
Rainfall
3.0 m/s
Wind
Light Breeze
0.4
UV Index
Low
10.4h daylight

March

March is cold with highs of 8°C and lows of -1°C. Moderate rainfall (46 mm) and mostly overcast skies.

46 Poor

Comfort

3°
Feels Like Cold
3°C
Temperature
-1° – 8°
78%
Humidity
Very Humid

Weather

46 mm
Rainfall
3.0 m/s
Wind
Light Breeze
0.7
UV Index
Moderate
11.8h daylight

April

April is cold with highs of 14°C and lows of 3°C. Moderate rainfall (55 mm) and mostly overcast skies.

55 Acceptable

Comfort

9°
Feels Like Cold
9°C
Temperature
3° – 14°
73%
Humidity
Very Humid

Weather

55 mm
Rainfall
2.9 m/s
Wind
Calm
1.0
UV Index
High
13.2h daylight

May

May is cool with highs of 18°C and lows of 7°C. Moderate rainfall (75 mm) and mostly overcast skies.

61 Good

Comfort

13°
Feels Like Cool
13°C
Temperature
7° – 18°
71%
Humidity
Very Humid

Weather

75 mm
Rainfall
2.4 m/s
Wind
Calm
1.4
UV Index
High
14.4h daylight

June

June is cool with highs of 22°C and lows of 11°C. The wettest month with 76 mm of rain and partly cloudy skies.

67 Good

Comfort

16°
Feels Like Cool
16°C
Temperature
11° – 22°
66%
Humidity
Humid

Weather

76 mm
Rainfall
2.4 m/s
Wind
Calm
1.7
UV Index
Very High
15.1h daylight

July

July is the warmest month with highs of 24°C and lows of 12°C. Moderate rainfall (61 mm).

83 Excellent

Comfort

18°
Feels Like Mild
18°C
Temperature
12° – 24°
59%
Humidity
Humid

Weather

61 mm
Rainfall
2.4 m/s
Wind
Calm
1.9
UV Index
Very High
14.8h daylight

August

August is mild with highs of 24°C and lows of 12°C. Moderate rainfall (51 mm).

85 Excellent

Comfort

18°
Feels Like Mild
18°C
Temperature
12° – 25°
56%
Humidity
Humid

Weather

51 mm
Rainfall
2.2 m/s
Wind
Calm
1.6
UV Index
Very High
13.7h daylight

September

September is cool with highs of 21°C and lows of 9°C. Moderate rainfall (40 mm) and partly cloudy skies.

75 Very Good

Comfort

15°
Feels Like Cool
15°C
Temperature
9° – 21°
61%
Humidity
Humid

Weather

40 mm
Rainfall
2.3 m/s
Wind
Calm
1.1
UV Index
High
12.3h daylight

October

October is cold with highs of 15°C and lows of 4°C. Moderate rainfall (42 mm) and partly cloudy skies.

63 Good

Comfort

10°
Feels Like Cold
10°C
Temperature
5° – 15°
72%
Humidity
Very Humid

Weather

42 mm
Rainfall
2.2 m/s
Wind
Calm
0.6
UV Index
Moderate
10.9h daylight

November

November is cold with highs of 8°C and lows of 0°C. Moderate rainfall (51 mm) and partly cloudy skies.

51 Acceptable

Comfort

4°
Feels Like Cold
4°C
Temperature
0° – 8°
80%
Humidity
Very Humid

Weather

51 mm
Rainfall
2.5 m/s
Wind
Calm
0.3
UV Index
Low
9.6h daylight

December

December is cold with highs of 4°C and lows of -3°C. Moderate rainfall (43 mm) and mostly overcast skies.

47 Poor

Comfort

0°
Feels Like Cold
0°C
Temperature
-3° – 4°
86%
Humidity
Very Humid

Weather

43 mm
Rainfall
2.5 m/s
Wind
Calm
0.1
UV Index
Low
9.0h daylight