Taking the local weather in Tanah Merah into account can help you maximise your time at the pool during your trip. The hottest months are usually May and April, with an average temperature of 27°C, while the coldest months are January and February, with an average of 25°C. The rainiest months in Tanah Merah are November, December, October and September, with each month seeing an average of 381 mm of rainfall.