My Stream Thermometer is a very important part of my trout and smallmouth bass angling. For example, on mountain trout streams the first thing I do is take the stream temperature. In early March if it is much below 40 degrees I know I will catch more trout on nymphs than I will on drys. In August a mountain trout stream temperature of 68 degrees in the afternoon means the trout are not going to feed heavily. The next trip I should get there about dawn when the stream may be several degrees cooler.
A smallmouth bass trip early in the spring with a river temperature of 52 degrees tells me to fish my flies slowly along the streambottom.
These stream temperatures go on my calendar at home along with readings over the last twelve years. Checking these helps me plan future trips on where to go and what to use.
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