There are 2 groups named High Tide. A current Reggae/Rock Group from the USA and the Classic Progressive Rock Group from the UK that was active during the 1970s. High Tide UK Bio:
High Tide, although they never managed much commercial success, are sometimes credited as one of the first heavy metal bands. The sound on their two historical album can be likened to Blue Cheer or Steppenwolf (but with lengthy improvisations in some tracks). They are also cited as a notable precursor of Prog Metal.