A marine battery system configured to provide energy to a marine vehicle load is provided. The marine battery system includes a battery, an enclosure configured to at least partially encapsulate the battery, a temperature sensor configured to detect temperature information within the enclosure, a pressure sensor configured to detect pressure information within the enclosure, and a controller coupled to the temperature sensor and the pressure sensor. The controller is configured to receive the temperature information from the temperature sensor, receive the pressure information from the pressure sensor, determine whether an enclosure breach condition has occurred based on a comparison of the temperature information and the pressure information, and in response to a determination that the enclosure breach condition has occurred, perform an enclosure breach mitigation action.