Lokka Reservoir
{{More citations needed|date=November 2023}}
{{Infobox body of water
| name = Lokka Reservoir
| image = Lokka reservoir 2.jpg
| caption = Lokka reservoir seen from embankment dam in Lokka village.
| image_bathymetry = Lokan tekojärvi.png
| caption_bathymetry = Location of the lake in Finland
| location = Sodankylä
|pushpin_map=Finland
| coords = {{coord|67|49|12|N|27|45|00|E|region:FI_type:waterbody_source:dewiki_scale:1000000|display=inline,title}}
| type = reservoir
| inflow = Luiro
| outflow = Luiro
| catchment =
| basin_countries = Finland
| length =
| width =
| area = {{convert|216|-|418|km2|abbr=on}}
| depth =
| max-depth =
| volume =
| residence_time =
| shore =
| elevation = {{convert|240|-|245|m|abbr=on}}
| frozen =
| islands =
| cities =
}}
The Lokka Reservoir (in Finnish: Lokan tekojärvi, Lokan allas, short form Lokka), is a reservoir, upstream of the Luiro River in Sodankylä, in northern Finland. Depending on the water level, its area ranges from 216 to 418 km². The corresponding water levels above mean sea level are 240–245 meters. The filling of the reservoir Lokka began in 1967, and with this reservoir, the amount of water coming to the power plants in Kemijoki could be regulated. Lokka has also been famous for its rich fish population. There are also populations of white-tailed eagles at the reservoir. These do not migrate south for the winter, instead they stay at Lokka to feed on fish left by local fishermen.
Lokka is connected to the Porttipahta Reservoir through the Vuotso Canal.
{{Weather box
|location = Sodankylä Lokka, 1991-2020 normals, extremes 1959-present
|metric first = Yes
|single line = Yes
|Jan record high C = 5.4
|Feb record high C = 5.6
|Mar record high C = 8.8
|Apr record high C = 16.5
|May record high C = 27.1
|Jun record high C = 31.5
|Jul record high C = 30.8
|Aug record high C = 30.3
|Sep record high C = 21.5
|Oct record high C = 14.5
|Nov record high C = 7.7
|Dec record high C = 6.4
|year record high C = 31.5
|Jan high C = −8.5
|Feb high C = −8.4
|Mar high C = -3.5
|Apr high C = 2.3
|May high C = 8.6
|Jun high C = 15.3
|Jul high C = 18.8
|Aug high C = 16.0
|Sep high C = 10.0
|Oct high C = 2.2
|Nov high C = -3.3
|Dec high C = -6.2
|year high C = 3.6
|Jan mean C = −12.7
|Feb mean C = −12.5
|Mar mean C = -8.3
|Apr mean C = -2.1
|May mean C = 4.0
|Jun mean C = 10.6
|Jul mean C = 14.1
|Aug mean C = 11.6
|Sep mean C = 6.5
|Oct mean C = -0.2
|Nov mean C = -6.3
|Dec mean C = -10.0
|year mean C = -0.4
|Jan low C = −17.7
|Feb low C = −17.6
|Mar low C = −14.0
|Apr low C = -7.2
|May low C = -0.4
|Jun low C = 6.0
|Jul low C = 9.2
|Aug low C = 7.0
|Sep low C = 2.7
|Oct low C = -3.1
|Nov low C = −9.9
|Dec low C = -14.5
|year low C = -5.0
|Jan record low C = −48.0
|Feb record low C = −48.0
|Mar record low C = −41.4
|Apr record low C = −31.5
|May record low C = −21.8
|Jun record low C = -4.0
|Jul record low C = -2.4
|Aug record low C = -6.6
|Sep record low C = −17.4
|Oct record low C = −30.0
|Nov record low C = −35.2
|Dec record low C = −40.6
|year record low C = −48.0
|Jan precipitation mm = 37
|Feb precipitation mm = 33
|Mar precipitation mm = 31
|Apr precipitation mm = 31
|May precipitation mm = 41
|Jun precipitation mm = 59
|Jul precipitation mm = 69
|Aug precipitation mm = 58
|Sep precipitation mm = 54
|Oct precipitation mm = 49
|Nov precipitation mm = 45
|Dec precipitation mm = 42
|year precipitation mm = 549
|unit precipitation days = 0.1 mm
|Jan precipitation days = 19
|Feb precipitation days = 17
|Mar precipitation days = 15
|Apr precipitation days = 14
|May precipitation days = 14
|Jun precipitation days = 14
|Jul precipitation days = 16
|Aug precipitation days = 15
|Sep precipitation days = 15
|Oct precipitation days = 18
|Nov precipitation days = 20
|Dec precipitation days = 20
|year precipitation days = 197
|source 1 = FMI normals for Finland 1991-2020{{Cite web |title=FMI normals 1991-2020 |url=https://helda.helsinki.fi/items/d7ce3a4f-bf47-4453-be76-2a0de738c59a |access-date=27 October 2023 |publisher=fmi.fi}}
|source 2 = Record highs and lows{{Cite web |title=FMI data |url=https://kilotavu.com/asema-taulukko.php?asema=102000 |access-date=27 October 2023 |publisher=FMI}}
|date=October2023
}}