Densities, viscosities, surface tensions, and refractive indices of triisopropanolamine + water systems were measured at (303.15, 313.15, 323.15, 333.15, and 343.15) K. The amine concentrations were selected at (5.0, 10.0, 15.0, 20.0, and 25.0) mass %. The measured data for four physical and transport properties were regressed with polynomial equations. The maximum deviations were found to be less than 0.01% for densities, 0.91% for viscosities, 0.4% for surface tensions, and 0.03% for refractive indices.