Generally speaking, the answer is no. As you can see in Image 1, when using ADS-B the NEXRAD radar range is around 100NM offshore from Florida towards the Caribbean. Beyond that no Radar coverage is available via ADS-B.
It should be noted that ADS-B tower transmission range is between 60-90NM, based on your location, altitude, and type of receiving antenna. Depending on these variables, you may not get offshore coverage to the extent pictured below.
Image 1. ADS-B radar coverage off the coast of Florida.
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