Prespa Lake is a tectonic lake shared by three countries: Macedonia, Greece and Albania. Within Macedonia, it is located in the southwestern part of the country.
Prespa Lake is located between the western branches of Baba Mountain east and eastern branches Galicica west and Suva Gora Gladno Pole to the south and southwest.
Greatest length of the lake in direction North - South is 28.6 km, and its greatest width is 16.9 km.
Prespa Lake lies at an altitude of 853 meters, covers an area of 274 km 2, of which 176.8 km 2 or 64.5% belong to Macedonia, 49.4 km 2 or 18.1% to Albania, 47 8 km2 to 17.4% of Greece.
Maximum depth of the lake is 54.2 meters and it is located near the area Golubina, while the average depth is 18.76 m.
The lake is filled with water from precipitation that are secreted directly above the lake surface, the water that condenses directly above the lake surface, groundwater, surface tributaries, such as: Brajcinska River, Kranska River, Shara River on the east and Golema Reka (Big River) from north side.
Lake Prespa has no surface outflow. However, most of the water lost through underground leakage through abysses Zavir or Vrandupka under limestone Mount Galichica and evaporation. These waters occur in karst springs St. Naum, Tusemiste and other.
Highest mid-month water lake level occurs in June and lowest in November. Annual fluctuations of the lake level is fairly large, multi-value has reached 846 cm. Highest mid-month surface water temperatures occur in August (21,6 ° C) and lowest in February (4.8 ° C), while the average annual value is 12,9 ° C, absolute maximum temperature reaches 29.0 ° C, and the absolute minimum to 0.3 ° C.
At extremely low temperatures the coastal part of the lake sometimes freezes. Water is a blue-greenish tint, with the utmost transparency in February of 10 m.