If you’re hoping to get lost in the rain on your romantic getaway, take a look at these details about year-round temperatures in Santa Rosa Beach: The hottest months are usually August and July, with an average temperature of 28°C, while the coldest months are January and February, with an average of 14°C. The rainiest months in Santa Rosa Beach are August, July, December and June, with each month seeing an average of 181 mm of rainfall.