Sesekinika Lake

Where Sesekinika Lake is

Sesekinika Lake lies in the District of Timiskaming.

How deep is Sesekinika Lake?

Sesekinika Lake reaches a maximum recorded depth of 10.7 meters, determined from 46,408 soundings.

See also Ontario's Largest and Deepest Lakes

Surveyed Depths

Ontario has surveyed the depths of several thousand of its lakes over more than half a century. Later surveys were conducted by boat with satellite positioning and produced hundreds of thousands of soundings per lake. Earlier surveys were charted by running transects across the water and drawing depth contours by hand.

Water quality

Ontario’s Lake Partner Program is a volunteer monitoring network. Participants collect water samples for phosphorus analysis and measure water clarity through the summer with a Secchi disk. Most sites are sampled for phosphorus once a year, in spring, and some several times a year between spring and fall. Phosphorus in many lakes rises through the summer, so the two kinds of average are measured on different bases.

Phosphorus is the nutrient that controls how much algae a lake can grow. A lake with little phosphorus stays clear and supports cold-water fish such as lake trout. As phosphorus rises, algae increase, the water clouds, and oxygen in the deep water falls as the algae decay. The province classifies each monitoring site by its average phosphorus:

• Oligotrophic, below 10 micrograms per litre: clear water and low algae.
• Mesotrophic, from 10 to 20: moderately productive water, with more algae and weed growth than an oligotrophic lake but rarely a bloom.
• Eutrophic, above 20: nutrient-rich water, prone to algal blooms and low oxygen at depth.

Sesekinika Lake has 10 Lake Partner monitoring sites. Six have reported phosphorus for the three or more years the province requires before a status is assigned. All are classified mesotrophic.

The longest record is held by site 4875/7 at Mid lake, deep spot, with phosphorus sampled once a year over 9 years to 2025. Its long-term mean phosphorus concentration is 15.74 micrograms per litre, within the mesotrophic band, which runs from 10 to 20.

A Secchi disk is a white or black-and-white plate lowered on a marked line until it disappears from view. The depth at which it vanishes is the Secchi depth, a direct measure of water clarity. Clearer water gives a deeper reading.

The 5 clarity readings at site 4875/7 give a median Secchi depth of 1.2 meters.

See also Lake Water Quality and Blue-Green Algae in Ontario

Sesekinika Lake Weather

The weather page for Sesekinika Lake carries the forecast over the water, wave heights across the lake, and the modelled water temperature.

Sesekinika Lake weather

Water temperature

Ontario’s aquatic resource records class Sesekinika Lake as a cool-water lake, with a mean depth of 2.3 meters against its maximum of 10.7.

A lake separates into layers through the summer where it is deep enough. Sunlight and wind warm and mix the upper few meters, and beneath a band of rapid cooling, the thermocline, the water stays cold. A shallow lake mixes to the bottom instead and warms through, sooner in spring and later into autumn.

No provincial monitoring station records water temperature on Sesekinika Lake. The LastLake model computes the temperature of its surface water for each day from the daily mean air temperature at Environment Canada’s Kirkland Lake climate station, 17 kilometers from the lake, or the next nearest station when its record is incomplete, and from the lake’s area of 645 hectares and its mean depth of 2.3 meters.

Each day’s figure carries the model’s typical error for that month on lakes of the same size. The figure in the chart below is the temperature near the surface, away from the shoreline. Bays, shallows and water deeper below the surface differ in temperature. Temperature is not measured when ice covers the lake. The weather page for Sesekinika Lake carries the model’s figures for the past weeks and the coming week.

See also Lake Water Temperature in Ontario

Fish in Sesekinika Lake

Ontario’s aquatic resource records name 7 fish species in Sesekinika Lake. The province’s other records for the lake name one further species, brook trout. It appears in the records below.

Popular species in the province’s records

• Lake Whitefishtrout and whitefish
• Northern Pikepike
• Walleyeperch
• Yellow Perchperch
• Smallmouth Basssunfish
• Burbotcod

Stocking history

Ontario’s stocking records for Sesekinika Lake run from 1947 to 2000 and hold 9 releases. Walleye account for most of the fish: 575,276 released in five of the years between 1947 and 1967. The last recorded release was 100 brook trout subadults in 2000.

The province’s record of stocking for recreational fishing, kept from 2016, lists no release into Sesekinika Lake.

Eating the fish

The 2026 Guide to Eating Ontario Fish carries consumption advice for two species taken from Sesekinika Lake, tested for contaminants at a sampling location in Maisonville Twp., Timiskaming Dist. Each figure below is the most meals a month the guide advises for a fish of that length. Where mercury sets the advice, the figure falls as the fish gets longer, because mercury accumulates over a fish’s life. A zero means the guide advises no meals of that fish at that size.

General population: adultsSensitive population: children under fifteen, women who are or may become pregnant

Fisheries Management Zone 8

Sesekinika Lake lies in Fisheries Management Zone 8. Ontario sets its fishing seasons and catch limits by zone.

Fisheries management zones around Sesekinika Lake

See also Fishing Seasons in Ontario, Zone by Zone and Fish Stocking in Ontario Lakes

Islands and names

Sesekinika Lake contains 27 islands in the Ontario Hydro Network’s outline, three of them over 10 hectares and ten under a tenth of a hectare.

Official names

Ontario’s geographic names register lists 4 official names on the water and its islands: 4 islands. The register records the origin of one name: Butte Island, “Unknown.”

Nearby lakes

• Kenogami Lake8 km away
• Watabeag Lake24 km away
• Long Lake36 km away
• Mistinikon Lake44 km away

All lakes

Questions about Sesekinika Lake

• How deep is Sesekinika Lake?

  Its maximum recorded depth is 10.7 meters.

• How big is Sesekinika Lake?

  Its surface covers 6.5 square kilometers and it holds 27 islands. Of its 42 kilometers of shoreline, 22 kilometers is the mainland shore and 20 kilometers is the shore of the islands.

• What fish are in Sesekinika Lake?

  Ontario’s aquatic resource records name seven species, among them walleye, smallmouth bass, northern pike, lake whitefish and yellow perch. The lake’s spawning, consumption and stocking records also name brook trout.

• Is the water clear?

  All six monitoring sites with a phosphorus status are classified mesotrophic, the middle of the province’s three bands.