The statistical analysis of 58 years of observation of waves data from the ERA-40 and ERA-Interim programs, covering the period 1958-2015, were used to understand significant storm swells heights and recurrence periods charasteristics in the Gulf of Guinea. Results show that the storm swells recorded in the Gulf of Guinea have significant heights between 2.10 and 3.10 m, while their periods are between 7 and 16 s. As for the main directions of origin, they are South and South-South-West on the West African coasts; South-South-West and South-West on the Cameroon coast in Central Africa. the application of Gumbel's theory reveals that the recurrence periods of storm swells are between 2 and 5 years, 5 and 10 years, 10 and 20 years, 20 and 40 years then between 40 and 60 years. These recurrence periods change from coast to coast. as do the estimated significant heights for different recurrence periods. in the last case, these heights also vary over time. the estimated significant storm swells heights of 100 years are of the order of 2.78 m in Côte d'Ivoire, 3.13 m in Ghana, 3.25 m in Togo, 3.22 m in Benin, 3.08 m in Nigeria and 2.91m in Cameroon.