  An exomoon on a non perfectly circular orbit experiences tidal heating that
is capable to significantly contribute to the thermal brightness of the moon.
Here we argue that the thermal heat is unevenly distributed on the moon's
surface, the emission of the tidal heat is limited to a few hot spots on the
surface. A well-known example is the tidally heated Io. Due to their
significantly increased temperature, the hot spots enhance the energy emission
in thermal wavelengths. We made simulations using Monte-Carlo method to examine
this contribution, and to predict about the possible detectability of such a
spotted exomoon. We found that in the case of large, Earth sized companions to
jupiters around red dwarf stars exhibit a thermal flux that enables the direct
detection of the moon, due to its photometric signal that can exceed
$\approx$100 ppm in the most favourable configurations.
