Selected regions (tiles) of Sentinel-2A/B MSI are available through NOAA CoastWatch.
Sentinel-2 MSI products are considered experimental. At present, 16 regions/tiles are processed (primarily Lake Anna, VA and the Cheseapeake Bay). These imagery (true color, Maximum Chlorophyll Index, and chlorophyll-a) can be accessed through the L1/L2 search feature of the Data Portal.