Winter Solstice December 21st.
December is the wettest month in Hawaii, which is great as most of the islands have been in drought for a long time, this gives our aquifers a chance to recharge, and many parts of our island get to go green again.
December is also a time of winter waves and swell. Maui gets its biggest waves in the winter and hosts several big wave surfing contests. In December you might also catch a glimpse of some island snow on the volcanoes of the Big Island, or you might even see some Snow atop Haleakala here on Maui. December is also whale season so there are all types of whale watching tours, and submarine tours run all year round.