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    • idefix37
      idefix37 Sailor Moderator last edited by idefix37

      I've just realized that Windy offers now a Tidal currents layer.
      That's great ! And all around the world. Very impressive!

      Capture d’écran 2021-01-27 à 17.28.27.png

      I'll check how accurate is this data, but looks already consistent.
      Just a remark that has been already posted (and will be again by mariners and sailors): the directions of currents are not shown in a conventional way:
      https://community.windy.com/topic/9012/sea-current-direction/2

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      • idefix37
        idefix37 Sailor Moderator last edited by idefix37

        Copernicus tidal currents data is based on the variation of sea surface altimetry measured by satellites (From CMEMS Copernicus Marine Environment Monitoring Service).
        https://resources.marine.copernicus.eu/?option=com_csw&view=details&product_id=SEALEVEL_GLO_PHY_L4_REP_OBSERVATIONS_008_047&pk_vid=6a7ee01823b6880d16118287836873d6
        From this data which gives the sea surface level, tidal currents are computed.
        The satellite data resolution is 0.25° x 0.25° or 15NM x 15NM (27km x 27km). That is enough to estimate correctly the sea surface level excepted in closed, long or narrow bays. But the tidal currents speed depends also on coast line and seabed mapping. In some areas these currents are probably underestimated.

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