  We analyze data retrieved by the Imaging Science System onboard the Cassini
spacecraft to study the horizontal velocity and vorticity fields of Saturn's
Polar Regions (latitudes 60-90$^\circ$N in June-December 2013 and
60-90$^\circ$S in October 2006 and July-December 2008), including the Northern
region where the hexagonal wave is prominent. With the aid of an automated two
dimensional correlation algorithm we determine two-dimensional maps of zonal
and meridional winds, and deduce vorticity maps. We extract zonal averages of
zonal winds, providing wind profiles that reach latitudes as high 89.5$^\circ$
in the south and 89.9$^\circ$ in the north. Wind measurements cover the intense
polar cyclonic vortices that reach similar peak velocities of 150 ms-1 at
88.5$^\circ$. The hexagonal wave lies in the core of an intense eastward jet at
planetocentric latitude 75.8$^\circ$N with motions that become non-zonal at the
hexagonal feature. In the south hemisphere the peak of the eastward jet is
located at planetocentric latitude 70.4$^\circ$S. A large anticyclone (the
South Polar Spot, SPS), similar to the North Polar Spot (NPS) observed at the
Voyager times (1980-81), has been observed in images from April 2008 to January
2009 in the South Polar Region at latitude -66.1$^\circ$ close to the eastward
jet. The SPS does not apparently excite a wave on the jet. We analyze the
stability of the zonal jets, finding potential instabilities at the flanks of
the eastward jets around 70$^\circ$ and we measure the eddy wind components,
suggesting momentum transfer from eddy motion to the westward jets closer to
the poles.
