36° – 37° C is a temperature that continues to feel warm and comforting no matter how long you're in the water.
Warm water is generally between 90 and 110 degrees Fahrenheit (32 to 43 degrees Celsius). Cold water is generally between 60 and 80 degrees Fahrenheit (16 to 27 degrees Celsius).
Equal to or Above 26°C
Considered very warm and would be enjoyed by all. With this temperature, you can stay active in the water for extended periods of time without feeling uncomfortable.
25C water feels like “slightly warm room temperature”, because normal room temperature is taken to be 20C – 25C.
There's no real optimal temperature, but many people feel “comfortable” swimming in water that is 70° to 78° Fahrenheit.
12-16 DEGREES: Fresh
In a wetsuit you may find you can swim comfortably for a while, outside of one the water is fresh, doable for the brave, and not a problem for hardened open water lovers.
Don't stay in cold water (under about 15 degrees) for longer than 45 minutes until you are quite experienced. If you are too cold, you may not realise it so set a firm time limit for yourself and stick to it.
The Canadian-based group considers cold temperatures to be under 10°C, while cool is 10°C to 20°C, warm or hot is 21°C to 39°C and anything above 40°C is considered scalding. It's safe to say you don't want to swim in waters less than 10°C or anything exceeding 40°C.
Thirty degrees and above is considered too warm for comfortable swimming by virtually all swimmers. Triathletes use a standard measurement of 24 degrees Celsius / 75 degrees Fahrenheit as the temperature up to which they are allowed to wear wet-suits. By that standard, 24 degrees is the upper limit of cold water.
Water Temperature of the Sea Below 22°C (72°F)
For swimming this is considered fairly warm and should be enjoyed by most, though some people may still find it a little too cool for their liking.
15 to 25 degrees is around the temperature that most swimmers find comfortable with initially feeling cold once they have entered the water and then being able to swim for several hours at a time at no risk.
However, most experts agree that a temperature between 24 and 32 degrees is ideal for most people. This range will allow swimmers to stay in the water for long periods without getting too cold or hot.
The ideal temperature for swimming at the beach can vary depending on your personal preferences, but generally, water temperatures between 70-78°F (21-26°C) are considered comfortable for most people.
No matter where you're swimming, avoiding water below 70 degrees Fahrenheit is a good rule of thumb for the average swimmer. The truth of the matter, though, is that 70 degrees is still pretty chilly. You'll probably have a better time if you wait for warmer water. In fact, you'll be safer, too.
Water temperature
The following benchmarks are a good reference point: Competitive swimming pools: 24°C-27°C. Public swimming pools: 26°C-28°C. Private swimming pools: 26°C-30°C.
Generally, the temperature of lukewarm water is between 98 and 105 degrees Fahrenheit. This may be converted roughly to 36.5 to 40.5 degrees Celsius.
Water is present in the liquid state at 25 ° C . Water, which we use in our daily lives, is in a liquid state. Water is in a liquid state when we drink it at room temperature i.e. 25 ° C .
Water removes heat by conduction and convection. At 25°C water removes more heat per second then air, unless your body is wet, the humidity is low, and you are in the wind. So you feel colder in water.
While some washing machine temperature settings go as low as 20°C, most cold washes start at 30°C. A setting of 30°C is usually recommended for washing delicate clothes when combined with a delicate cycle, and not on quick wash.
20C: You might like a wetsuit for longer swims but not necessary. 18C: Time for a wetsuit unless your swim time is quite short. FINA and Swimming Australia say wetsuits (not swim-suits) are mandatory in OWS events under 18 degrees.
Water is very "stubborn" to change temperature. It takes 4 times the energy to heat up water than to heat air. Water also "feels" colder because water is a more efficent medium than air to cool our body down.
Atmospheric conditions play a high impact on temperatures of 20 degrees and on how we perceive them. Wind and humidity can make us feel cold, even though temperatures of 20 degrees Celsius are considered warm. On the other hand, if it's clean and sunny, you might feel hot.
The water temperature on the night of the disaster was 28°F (-2°C), which is below the freezing point of sea water. Immersion in such cold water can cause several life-threatening conditions. One of the primary risks associated with cold water immersion is hypothermia.
You should treat any water temperature below 70F with caution. Learn why we use 70F (21C) when recommending that people consider wearing thermal protection like wetsuits and drysuits.