If you have 3 temp gauges, then you have the accurate temp. Temp is relative. Its about what the bass are doing. This time of year its winter pattern. But when it begins to warm up, you might find warmer than expected temps, but the fish may not be doing what you think they should be doing. That's why sometimes going to your favorite part the lake can hurt you. For instance, the Nianguas usually seem to be ahead of the rest of LOZ. But if you go up there to fish warmer water, you might find the late winter schools have broken up and scattered to their migration. But the lower end of the lake might still have big schools on ml areas. You may have to bust your hump to find them in Nianguas, but you might sit on 1 point by the dam area and catch a nice limit. Vice versa when the Nianguas warm up first and the first wave of big females get real active, the dam area fish might still be slugish.