For the greater part of the Musky season, most bodies of water are locked into the characteristic thermal distribution commonly referred to as the "summer thermal water pattern". The graphic shown here at the left demonstrates this summer thermal pattern. Water at the surface tends to change gradually in water temperature and tends to have higher levels of oxygen than the water layers beneath it. The thermocline is sort of like a buffer area between the warmer surface water and the cooler deeper water. The cooler deeper water tends to have the lowest level of oxygen during this period of time. Musky tend to populate the upper water levels when they are active and the lower water levels when they are inactive. The hotter the top layer of water, the more likely Musky are to seek a comfortable temperature at greater depths. At these greater depths, they are less likely to be aggressively active. As summer transitions to fall and the water looses its heat to the longer cooler evenings, the temperature difference between the thermal layers of the lake become less distinct. Most of the oxygen is still located in the surface layer of the water and Musky tend to be more active during this time. Typically, this time is associated with late August and early September. Temperatures will vary depending upon the geographic location and the depth of the body of water so you should keep a close watch upon the water
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