Trevor John McDougall is an Australian physical oceanographer specialising in ocean mixing and the thermodynamics of seawater.

He is Emeritus Scientia Professor of Ocean Physics in the School of Mathematics and Statistics at the University of New South Wales, Sydney, Australia,[2][3] and is Past President of the International Association for the Physical Sciences of the Oceans (IAPSO)[4] of the International Union of Geodesy and Geophysics.

[2] Since 2012 he has been Scientia Professor of Ocean Physics in the School of Mathematics and Statistics at the University of New South Wales, Sydney.

[2] McDougall's research in physical oceanography has provided insight to how seawater mixes under different conditions, which is important for understanding climate change.

[5] McDougall has also made significant contributions to incorporating the concepts of mixing and heat into ocean models.