A system (100, 200) for monitoring water drainage, the system comprising: - a sensor interface for obtaining a sensor signal from a sensor (110, 210, 212, 216, 218), the sensor (110, 210, 212, 216, 218) being configured to detect water presence at an associated surface (112, 280, 282, 286, 288) and configured to generate the sensor signal indicative of water presence at the associated surface (112, 280, 282, 286, 288), characterized by the following features: - a storage (120, 220) for storing water drainage information relating to the associated surface (112, 280, 282, 286, 288), the water drainage information comprising characteristics of water presence on the associated surface (112, 280, 282, 286, 288) due to atmospheric precipitation at the associated surface (112, 280, 282, 286, 288), - an atmospheric precipitation unit (130, 230) for obtaining atmospheric precipitation information comprising information about recent atmospheric precipitation in the vicinity of the associated surface (112, 280, 282, 286, 288), - a signal generator (140, 240) coupled to the sensor interface, the storage (120, 220) and the atmospheric precipitation unit (130, 230), the signal generator (140, 240) being configured to: i) obtain predicted water presence data by applying the water drainage information retrieved from the storage to the atmospheric precipitation information received from the atmospheric precipitation unit (130, 230), ii) compare the sensor signal received from the sensor interface with the predicted water presence data, iii) generate a warning signal indicating a problem with the water drainage in relation to the associated surface (112, 280, 282, 286, 288) if in the comparison a deviation is detected between the sensor signal and the predicted water presence. - a sensor interface for obtaining a sensor signal from a sensor (110, 210, 212, 216, 218), the sensor (110, 210, 212, 216, 218) being configured to detect water presence at an associated surface (112, 280, 282, 286, 288) and configured to generate the sensor signal indicative of water presence at the associated surface (112, 280, 282, 286, 288), characterized by the following features: - a storage (120, 220) for storing water drainage information relating to the associated surface (112, 280, 282, 286, 288), the water drainage information comprising characteristics of water presence on the associated surface (112, 280, 282, 286, 288) due to atmospheric precipitation at the associated surface (112, 280, 282, 286, 288), - an atmospheric precipitation unit (130, 230) for obtaining atmospheric precipitation information comprising information about recent atmospheric precipitation in the vicinity of the associated surface (112, 280, 282, 286, 288), - a signal generator (140, 240) coupled to the sensor interface, the storage (120, 220) and the atmospheric precipitation unit (130, 230), the signal generator (140, 240) being configured to: i) obtain predicted water presence data by applying the water drainage information retrieved from the storage to the atmospheric precipitation information received from the atmospheric precipitation unit (130, 230), ii) compare the sensor signal received from the sensor interface with the predicted water presence data, iii) generate a warning signal indicating a problem with the water drainage in relation to the associated surface (112, 280, 282, 286, 288) if in the comparison a deviation is detected between the sensor signal and the predicted water presence. - a storage (120, 220) for storing water drainage information relating to the associated surface (112, 280, 282, 286, 288), the water drainage information comprising characteristics of water presence on the associated surface (112, 280, 282, 286, 288) due to atmospheric precipitation at the associated surface (112, 280, 282, 286, 288), - an atmospheric precipitation unit (130, 230) for obtaining atmospheric precipitation information comprising information about recent atmospheric precipitation in the vicinity of the associated surface (112, 280, 282, 286, 288), - a signal generator (140, 240) coupled to the sensor interface, the storage (120, 220) and the atmospheric precipitation unit (130, 230), the signal generator (140, 240) being configured to: i) obtain predicted water presence data by applying the water drainage information retrieved from the storage to the atmospheric precipitation information received from the atmospheric precipitation unit (130, 230), ii) compare the sensor signal received from the sensor interface with the predicted water presence data, iii) generate a warning signal indicating a problem with the water drainage in relation to the associated surface (112, 280, 282, 286, 288) if in the comparison a deviation is detected between the sensor signal and the predicted water presence. i) obtain predicted water presence data by applying the water drainage information retrieved from the storage to the atmospheric precipitation information received from the atmospheric precipitation unit (130, 230), ii) compare the sensor signal received from the sensor interface with the predicted water presence data, iii) generate a warning signal indicating a problem with the water drainage in relation to the associated surface (112, 280, 282, 286, 288) if in the comparison a deviation is detected between the sensor signal and the predicted water presence.