Northern pike survive and feed in a wide range of water temperatures, though they prefer 60 to 65 degrees. If you live in Canada or the northern half of the U.S., your local pike waters might maintain those temperatures throughout the summer. If that’s the case, finding big pike becomes less of the challenge. In much of their range, however, assume the heat of the summer will bring the surface temperature well above that optimal comfort zone. Little fish may still hold shallow all day, but the trophies are going to seek more pleasant temperatures, and that means they’ll go deep. In summer, a quality fish finder can be a very useful tool, not so much to mark fish, but to locate deep weed lines. Whether pike are deep or shallow, they stay with the salad. The ideal scenario is to find a weed line growing up a slope or ledge, starting in approximately 15 to 20 feet of water and continuing up to the bank. This gives larger pike a place to hang by day, lounging in the cooler water at the base of the slope, and also quick access to the shallows that host all the bluegills, shad, suckers, and smaller pike the jumbos eat.