When choosing the size of a swimbait for different water temperatures, there are several factors to consider. These factors include the combination of water temperature, water visibility, the size of the bass in the lake, the average depth that the fish are using, and the lake you are fishing in.
In the dead of winter, when water temperatures are at their coldest point, it is often beneficial to use a smaller profile swimbait. This is because the fish tend to be less active during this time and may prefer a smaller meal. As you progress into the pre-spawn period and the water temperature starts to rise, the size of the baitfish in the lake also increases. This is when using a larger swimbait becomes more effective.
Water visibility is another important factor to consider. In clear water conditions, where there is good visibility, using a smaller swimbait can be more successful. On the other hand, in muddy or stained water, where visibility is reduced, using a larger swimbait with more vibration and movement can help attract fish.
The average depth that the fish are using at a particular time of year is also crucial. Understanding the depth at which the fish are holding can help determine the appropriate size of the swimbait. For example, if the fish are shallow, in the five to ten foot range, using a smaller swimbait like a four-inch spark shad on an eighth ounce head can be effective.
It's important to note that the information provided is based on the video context and the opinions of the anglers featured in the videos. If you have specific questions or need further clarification, please let me know.