When choosing the appropriate size swimbait for varying water temperatures, there are several factors to consider. These factors include the combination of the lake you're fishing, the size of the bass in the lake, water temperature, water visibility, and the average depth that the fish are using at that time of year.
In the winter, when water temperatures are at their coldest point, it seems that bass prefer smaller profile swimbaits. This could be due to the fact that the fish are less active and may not want to expend too much energy chasing larger baits. So, during the winter months, using a smaller profile swimbait, such as a three-inch bait, may be more effective.
As you progress into the pre-spawn period, when water temperatures start to rise, the size of the baitfish in the lake also increases. This means that using larger swimbaits, such as a four-inch bait, may be more effective. The increase in water temperature and the presence of larger baitfish can trigger the bass to become more aggressive and feed on larger prey.
Water clarity also plays a role in choosing the appropriate swimbait size. In clear water conditions, using smaller swimbaits can be more effective as they mimic the size of the natural baitfish. However, in murky or stained water, using larger swimbaits can create more visibility and attract the attention of bass.
The depth at which the fish are holding is another important consideration. If the fish are holding in deeper water, using a larger swimbait can help you reach them effectively. On the other hand, if the fish are shallow, using a smaller swimbait may be more appropriate.
It's important to note that these guidelines may vary depending on the specific lake and the preferences of the bass in that particular body of water. So, it's always a good idea to experiment with different sizes and observe the fish's response to determine the most effective swimbait size for the given water temperature.
Please note that the information provided is based on the video context available. If you have any specific questions or need further clarification, please let me know.