Taking into account the local weather in Cửa Việt can help you maximize your time at the pool during your trip. The hottest months are usually June and May with an average temp of 84°F, while the coldest months are January and December with an average of 72°F. The rainiest months in Cửa Việt are October, November, September, and December, with each month seeing an average of 19 inches of rainfall.