Something labeled semidiurnal occurs this often
[DOC] [TLE] Types and Causes of Tidal Cycles - Tides and Water Levels: NOAA's ... [PAR] Diurnal, Semidiurnal, Mixed Semidiurnal; Continental Interference ... patterns 
within each ocean basin that often differ greatly from tidal patterns of adjacent 
ocean basins or ... Three basic tidal patterns occur along the Earth's major 
shorelines.