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.

Iskar Reservoir at a Glance#

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About Iskar Reservoir#

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).

Air Quality: AQI 59 Moderate

Best Time to Visit

AugustJulySeptember

Temperature & Rainfall

Temperature Range

39°

Warmest Month

-23°

Coldest Month

Monthly Conditions

Month	Comfort	Temp	Feels	Rain	Sky	Humidity	Wind	UV	Daylight
January	Poor	-5° - 3°	-5°	34 mm	overcast	88%	2.7 m/s	0.2 low	9.3h
February	Poor	-5° - 4°	-4°	39 mm	overcast	84%	3.0 m/s	0.4 low	10.4h
March	Poor	-1° - 8°	0°	46 mm	overcast	78%	3.0 m/s	0.7 moderate	11.8h
April	Acceptable	3° - 14°	7°	55 mm	overcast	73%	2.9 m/s	1.0 high	13.2h
May	Good	7° - 18°	13°	75 mm	overcast	71%	2.4 m/s	1.4 high	14.4h
June	Good	11° - 22°	16°	76 mm	partly cloudy	66%	2.4 m/s	1.7 very high	15.1h
July	Excellent	12° - 24°	18°	61 mm	some cloud	59%	2.4 m/s	1.9 very high	14.8h
August	Excellent	12° - 25°	18°	51 mm	some cloud	56%	2.2 m/s	1.6 very high	13.7h
September	Very Good	9° - 21°	15°	40 mm	partly cloudy	61%	2.3 m/s	1.1 high	12.3h
October	Good	5° - 15°	9°	42 mm	partly cloudy	72%	2.2 m/s	0.6 moderate	10.9h
November	Acceptable	0° - 8°	2°	51 mm	partly cloudy	80%	2.5 m/s	0.3 low	9.6h
December	Poor	-3° - 4°	-3°	43 mm	overcast	86%	2.5 m/s	0.1 low	9.0h