  We study the relation between the mean effective surface temperature T_s and
the internal temperature T_b for magnetic neutron stars, assuming that the
magnetic field near the surface has a presumably small-scale structure. The
heavy-element (iron) and light-element (accreted) heat-blanketing envelopes are
considered, and the results are compared with the case of a dipole magnetic
field. We argue that the difference in the T_b(T_s)-relation for different
magnetic configurations is always much smaller than a possible difference
caused by variations of the chemical composition in the envelope.
