3.98°CClick to see full answer. Keeping this in view, at what temperature is water its densest?Well, it turns out this happens to be around 4°C. This is when the water molecules are closest together. Cooling water further than 4°C causes the density to decrease up to the point where it becomes a solid which is less dense than the liquid. which type of water is the most dense? Explanation: cold water is more dense than warm water because hot water molecules move faster than molecules of cold water. Likewise, why water is most dense at 4 degrees? At 4 degree centigrade , the hydrogen bond is at its smallest length. So the molecules are very close together . This results in highest density of water . As the temperature keeps going down , the hydrogen bond becomes weaker so the molecules of water begin to drift apart .At what temperature is water most dense quizlet?The density of water become LESS DENSE as it cools towards freezing point But water is most dense in its liquid state at 4 degrees Celsius.