Other facts from our historical weather data: Which is the warmest month in Coles Bay? February has an average maximum temperature of 19°C (66°F) and is the warmest month of the year. Which is the coldest month in Coles Bay? The coldest month is August with an average maximum temperature of 13°C (55°F). Which is the wettest month in Coles Bay? November tops the wettest month list with 65mm (2.6 in) of rainfall. Which is the driest month in Coles Bay? May is the driest month with 38mm (1.5 in) of precipitation. No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.