Ocean microseisms, caused by ocean gravity waves, dominate the ambient seismic wavefield from 1 to 20 s. Microseisms can be categorized as primary microseisms (PM) from 10 to 20 s and secondary microseisms (SM) from 1 to 10 s. Although the observations were well established, the characteristics of ocean microseisms in Cuba have never been explored, and those in semi‐enclosed seas have been investigated to a limited extent compared with open oceans. Therefore, we analyzed broadband seismic data at 13 stations in Cuba from 2020 to 2021 to reveal the excitation. First, we revealed the main spectral features for the peaks of PM and SM. Second, we estimated the location of the sources that contribute to generating SM at three period ranges: 1–2 s, 2–4 s, and 4–8 s. For this purpose, we conducted polarization analysis at each seismic station, focusing on both Rayleigh and P waves. Our results reveal a broad SM peak with a dominant period between 2.9 and 4.1 s at all stations. A more stable PM peak was found at 15.6 s. We found a weak seasonal variation of microseism activity; relatively stronger SM occurred during the dry season. We identified directional incident Rayleigh waves at periods of 1–2 s and 2–4 s, with no seasonal variation in the source locations at most of the stations and distributed source directions at periods of 4–8 s. Conversely, seasonality in P‐wave sources at periods of 4–8 s is strong for most of the Cuban stations: sources originating from the north and south, corresponding to the local winter of the northern and southern hemispheres, respectively. These findings contribute to a better understanding of microseisms at locations of weak ocean microseism sources.

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