This article aims at analysing the current situation of Brazilian seapower, based on the theoretical and conceptual grounds from the book - A Guide for the 21st Century by the British naval strategist Geoffrey Till, pointing out the strengths and weaknesses of Brazil’s seapower. The current situation of Brazilian seapower will be evaluated in each component of seapower conceived by Till: Maritime People, Society and Government, Maritime Geography, Resources, Maritime Economy, Seapower and others means, and Doctrine. Key words : Sea Power, Brazilian Navy, Naval Strategy.