  We consider the Nernst and Hall effects in fluctuation regime of chiral
superconductors above transition temperatures, that are raised not by
conventional Lorentz force, but by asymmetric scattering due to fluctuations of
the Berry phase of the Bogoliubov-de Gennes Hamiltonian. It is found that these
effects can be more significant than conventional ones for cleaner samples,
exhibiting qualitatively distinct behaviors. The results provide systematic and
comprehensive understanding for recent experimental observations of the Nernst
effect in a clean URu$_2$Si$_2$ sample, which is suggested to be a chiral
superconductor.
