The present experimental study is focused on the characterization of the slipstream of an isolated twin-bladed fixed-pitch propeller. Measurements of the instantaneous axial and tangential velocities are performed using hot-wire anemometry in the near wake region (up to x = 1.18R) of the propeller-slipstream for a low advance ratio J = 0.45 and at a low Reynolds number (Re_c ≈ 29000, where c is the chord at 75% of the propeller radius). Traces of the instantaneous velocity show a periodic flow consisting of unsteady potential flow regions interspersed by turbulent blade wakes. The contraction of the slipstream is evident from the increase in the mean axial velocity in the streamwise direction, which is also accompanied by an increase in the mean tangential velocity due to the conservation of the angular momentum. The maxima of both components of the mean velocity occur in the vicinity of the mid-radius region of the blades, suggesting that this region is associated with high sectional lift and drag. Although the mean kinetic energy increases in the streamwise direction, the turbulent kinetic energy decays. The width of the blade wakes is estimated using Taylor's hypothesis and is observed to vary non-monotonically in the streamwise direction.