Temperature of tallgrass prairie vegetation were measured with infrared thermometers (IRT) at different view zenith and azimuth angles. The optimum IRT view zenith angle for estimating sensible heat fluxes (H) were determined by comparing H estimated with eddy correlation and/or Bowen ratio techniques to H calulated by a method suggested by Hatfield et al. (1984). For wind speeds of 5 m s-1 or greater, H estimated with surface temperatures measured at a 0¿ or 20¿ view zenith angle gave the best agreement, but for wind speeds of less than 4 m s-1 the best estimate of H was made with surface temperature measured at a 40¿ or 60¿ view zenith angle. ¿American Geophysical Union 1992