As a random process, the temperature microstructure in water exhibits both time and spatial correlation characteristics. Thus, acoustic signals propagated along diverging or converging paths should indicate some degree of cross correlation due to the temperature microstructure. This dependence is investigated in a water tank with a controlled temperature microstructure. The angular separation between paths is varied and cross‐correlation functions are computed for the various separations. The measurements were made using pulsed signals at 500 kHz. The correlation between the received signals decreases as the angular separation between the paths is increased.