Weather is only one factor, but it can really affect your travel plans, especially if you're planning an extended stay in Matanzas Beach. The hottest months are usually July and August with an average temp of 73°F, while the coldest months are January and February with an average of 33°F. The snowiest months in Matanzas Beach are January, November, February, and December, with each month seeing an average of 6 inches of snowfall.