Although the natural gas and renewable energy sources are two significant elements of the Baltic primary energy mix both today and in foreseeable future, the competitive edge of their usage often prevails over possibilities of mutually beneficial coexistence. Universally both forms of energy are often described as key elements of a transition to a cleaner and more secure energy future (low-carbon economy), but regionally much of the current discourse considers each in isolation or concentrates on the competitive impacts of one on the other. The paper outlines several potential avenues and further research trends of synergies between the natural gas, a proven fastreacting fossil fuel, and RES as seen from viewpoints of the Baltic energy sector sustainability and security of energy supply.