Salinity and temperature affect density, Pressure on the seabed is a function of density and depth. Depth is modified by meteorological effects as mentioned, and these are amplified in enclosed areas.
NOAA "Local wind and weather patterns also can affect tides. Strong offshore winds can move water away from coastlines, exaggerating low tide exposures. Onshore winds may act to pile up water onto the shoreline, virtually eliminating low tide exposures. High-pressure systems can depress sea levels, leading to clear sunny days with exceptionally low tides. Conversely, low-pressure systems that contribute to cloudy, rainy conditions typically are associated with tides than are much higher than predicted."