There is provided mechanisms for classifying microwave link data of a microwave system comprises a point-to-point wireless microwave link. A method is performed by a controller entity. The method comprises obtaining, in time windows, microwave link data in terms of signal quality measurement values and received power values for the point-to-point wireless microwave link. The method comprises classifying per time window, the microwave link data per time window to operating conditions in a set of operating conditions by, from the signal quality measurement values and received power values per time window, estimating probability values for each of the operating conditions according to a mapping, as learned through training, between pieces of microwave link data and operating conditions.