The Swiss Federal Office for the Environment (FOEN) is currently evaluating options to add a nation-wide lake temperature monitoring program to their monitoring activities, which already includes a network of river temperature monitoring. The objective of this short report is to provide a preliminary assessment about the following questions from the perspective of a research institute: • Why do we need a lake temperature monitoring? • What should be considered in selecting monitoring locations? • What should be considered in designing a monitoring system? This report should thus form the basis for a more detailed assessment that will have to be conducted during the development of a strategy for the lake monitoring.