Abstract: A portable solar energy water heating system is provided. The system can include an inflow line having an inlet, at least a portion of the inflow line positionable in a body of water. The system can also include an outflow line having an outlet, at least a portion of the outflow line positionable in the body of water. The system can also include a conduit portion housed in a container housing and a magnifying glass or lens positioned over the conduit portion and configured to direct solar energy onto the conduit portion for heating water flowing therethrough between the inlet and the outlet, thereby providing heated water to the body of water. Optionally, the container portion can be at least partially filled with a substance that retains heat, such that the conduit portion is at least partially submerged in the substance.