Last night was a two-blaket night.
The morning was brisk, but skies are sparkling and clear - stunning light on the water and and it looks like a picture-postcard perfect day.
The rule of thumb for December is that the weather is unpredictable. Could be hot, could be cold, could be sunny, could be raining. In general December is sand flea weather - buy a "Vape" and plug it in in your room at night - the little critters will not bother you. Check the island Super market for a "Vape" and the pads that go in them.