Taking the local weather in Hải Giang into account can help you maximise your time at the pool during your trip. The hottest months are usually June and August, with an average temperature of 28°C, while the coldest months are January and February, with an average of 24°C. The rainiest months in Hải Giang are November, October, December and September, with each month seeing an average of 331 mm of rainfall.