espanolSe analizan las principales caracteristicas del Monzon del Oeste de America ecuatorial (MOAE) como componente importante del sistema climatico que afecta a la costa pacifica colombiana. Se ha delimitado objetivamente el MOAE, cuantificando su variabilidad mediante el indice dinamico normalizado estacional (DNS), obtenido a partir de datos de viento procedentes del NCEP. Se ha encontrado que las variaciones mas significativas en los regimenes de rotacion entre los vectores del viento de DEF y JJA se enmarcan dentro de la categoria de monzon para los niveles inferiores de presion, con variaciones en el angulo del vector viento superiores a 120°. Ademas el DNS identifica cambios estacionales significativos en el campo de viento, que se enmarcan dentro de la categoria de clima monzonico. Por ultimo, al relacionar el DNS en 850 hPa y 925 hPa, con la precipitacion se ha encontrado que el monzon exhibe fuertes caracteristicas regionales, coherentes con los patrones regionales de la precipitacion estacional, afectando de manera considerable a la variabilidad anual e interanual de las lluvias en la region del Pacifico Colombiano. EnglishThis paper analyzes the main features of the West Equatorial America Monsoon (MOAE) as an important component of the climate system that affects the Pacific coast of Colombia. MOAE has been objectively identified quantifying its variability through the Dynamical Normalized Seasonality (DNS) index, obtained using wind data from NCEP. It has been found that the most significant variations in rotation regimes between the JJA and DEF wind vectors, fall into the category of monsoon for the lower levels of atmospheric pressure, with variations in the wind vector angle over 120°. In addition, the DNS identifies significant seasonal changes in the wind field, which are within the category of climatic monsoon. Finally, by relating the DNS at 850 hPa and 925 hPa with precipitation, it has been found that the monsoon exhibits strong regional characteristics, consistent with regional patterns of seasonal rainfall, affecting significantly to the annual and interannual variability of rainfall in the Colombian Pacific region.