Both the lower Tuolumne and lower Merced are currently running at 184cfs, which makes for excellent wading access on both rivers. While these lower flows improve accessibility, they also tend to slow fishing productivity compared to the stronger winter and spring flows. The weather this week is expected to remain slightly cooler, with highs in the upper 70s to mid 80s, although temperatures are expected to rise quickly again by the end of next week.

Fishing Conditions & Tactics

Even though these flows may look ideal for getting on the water, both rivers typically fish slower at these lower summer levels. On the Tuolumne, fishing activity generally drops off once flows fall below the low 200s. The lower Merced presents a different challenge, as warming water temperatures can become an issue during extended hot weather.

The Tuolumne remains somewhat more stable because it drains from the bottom of Don Pedro Reservoir, helping maintain cooler water temperatures. The Merced, however, drains from a much shallower spillover reservoir, meaning warmer surface water is what continues downstream. As a result, water temperatures on the Merced can rise quickly during hot weather and negatively impact fish activity.

For anglers choosing to fish either system, focusing on early mornings will provide the best conditions before afternoon temperatures begin warming the water further.

Overall Outlook

Although both rivers remain very approachable and easy to wade, the combination of low water and warming temperatures will continue to make fishing more difficult than earlier in the season. Because of these conditions, we would strongly recommend checking out other local waters that are currently offering cooler temperatures and more consistent fishing opportunities.