Other facts from our historical weather data: Which is the warmest month in Gorleston-on-Sea? August has an average maximum temperature of 20°C (68°F) and is the warmest month of the year. Which is the coldest month in Gorleston-on-Sea? The coldest month is February with an average maximum temperature of 8°C (46°F). Which is the wettest month in Gorleston-on-Sea? October tops the wettest month list with 86mm (3.4 in) of rainfall. Which is the driest month in Gorleston-on-Sea? April is the driest month with 44mm (1.7 in) of precipitation. Which is the sunniest month in Gorleston-on-Sea? May is the sunniest month with an average of 204 hours of sunshine. 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.