The modular enclosure with water management mating interfaces most fundamentally includes a mechanical connection which directs and obstructs water via various strategically positioned structures and gaps. One basic configuration includes a base having at least one end face and a periphery extending from the end face. The periphery includes an outward projecting lip. A plurality of retainers is secured to the base below the lip. The retainers and the lip define a channel extending along at least part of each side of the base. A dome having longitudinal sides that terminate in a bottom edge and an inward projecting flange that is spaced from the bottom edge is received by the flange in the channel to retain the dome to the base.