Measurements of velocity profiles and static pressure distribution have been carried out on jets impinging on a concave hemispherical plate (CHP). In comparison with the flat plate (FP), the boundary layer at the stagnation point appears to be unchanged, but the potential core length is slightly shorter, while in the wall-jet region the inner boundary layer is thinner, and the velocity profile is somewhat steeper farther away from the plate. A formula has been derived for the maximum wall-jet velocity decay that agrees well with the experimental data. Heat transfer at the stagnation point is on CHP adversely affected by the presence of curvature, which also tends to make flow there more turbulent, as observed for the smaller diameter jets. The average heat transfer is independent of the nozzle- to-target spacing, in both the measured and the calculated version. The total heat transfer on a CHP is higher, caeteris paribus, than that corresponding to a FP, because of a larger surface area for the same diameter, for close target to nozzle spacings. It appears that the use of CHP of relatively small diameter as a target plate would enhance heat transfer from impinging jets.