A model was constructed for the M2 tide in the Bay of Fundy, in which the two-dimensional hydrodynamical equations with quadratic friction were integrated in time. After calibration tests, in which the normal tide was reproduced, calculations were carried out to determine any changes from the normal configuration caused by the presence of tidal barriers in the vicinity of Cape Enrage, Cape Sharpe, and Cape Chignecto.The effect in each instance was a reduction of amplitude and an advancement of the time of high water. The maximum amplitude reductions were as follows: single barrier at Cape Sharpe, 15%; single barrier at Cape Enrage, 13%; both barriers at Cape Sharpe and Cape Enrage, 19 and 20%; twin barrier at Cape Chignecto, 21–27%.