We have seen most pools at a temperature of 86°-88° degrees Fahrenheit (30°-31° Celsius), but have known some to get in the upper 90°s (32° Celsius). Most spas are heated higher than that, some even to the limit of 104° degrees Fahrenheit (40° Celsius) All heat pumps have a limit of 104° (40° ) for safety reasons.
Pool water temperatures typically run between 78 and 82 degrees. Any cooler than 78 and you may come out of the pool shivering.
When water temperatures are between 60 and 70 degrees it becomes progressively more difficult to control your breathing. It becomes very dangerous in water temperatures between 50 and 60 degrees. You lose the ability to control breathing in this temperature range, according to the National Center for Cold Water Safety.
Safe temperatures for swimming pools vary with type of activity. According to the World Health Organization, water temperatures ranging from 78 to 86 degrees Fahrenheit are generally comfortable and safe for those engaging in moderate physical activity in a pool.
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 temperatures are slow to heat up, and just as slow to cool down. 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.
Higher temperatures are therapeutic
While pools should be never above 95 degrees, anywhere in the 90-92 degree range creates a comfortable, yet therapeutically warm environment for older swimmers or infants and toddlers learning how to swim.
According to the National Oceanographic Data Center, 70-78 degrees is where most people feel comfortable swimming. I have found that a water temperature of 70-78 degrees is a bit cold for most of us north Texans.
You can overheat more readily: If you're swimming outdoors, it's easier to overheat when exercising or training in the afternoon. The safest temperature to swim in is between 78 and 82 degrees.
It develops much more quickly than standard hypothermia because water conducts heat away from the body 25 times faster than air. Typically people in temperate climates don't consider themselves at risk from hypothermia in the water, but hypothermia can occur in any water temperature below 70°F.
The temperature of the water was -2.2 degrees Celsius when Titanic was sinking.
You have a 20,000-gallon pool and use a 125,000 BTU heater. Your water is currently 70 degrees F but you would like it to be a minimum of 80 degrees F. How long will it take before the pool water reaches 80 degrees F? 10 x 1.33= 13.34 hours of heating before the pool reaches 80 degrees F.
On average, natural gas burns about 1 therm per 100,000 BTUs per hour (British Thermal Units). Meaning, an average pool heater between 300,000 and 400,000 BTUs will cost anywhere from $3.30 to $4.40 per hour to heat your pool.
Swimming pools are usually the warmest in the evening. Having a swimming pool close by in the summer makes the season enjoyable. The only cause for concern might be the coldness of the water if you jump in first thing in the morning.
With a dry city like Las Vegas, the heat has less effect on the pool's temperature, resulting in a cooler water temperature. Additionally, due to the high volume of visitation during the peak summer months, our properties' pools are backwashed daily, which also adds to coolness.”
Although pools experience evaporation all year, it becomes more prevalent during the cooler nights. As the air becomes cooler, the humidity drops and the air more readily absorbs moisture and heat from the pool water.
Pool heaters have the potential to be an incredibly worthwhile investment if a family wants to utilize its new pool year 'round, or even just well into school starting in the fall. These heaters have state of the art technology that allow for comfortable swimming temperatures, even in sweater weather.
So, how much electricity does a pool heat pump use? About 5 kilowatts per hour per 100,000 BTU heat pump. For a general 100,000 BTU pool heat pump, the power you`ll utilize is approximately 5,000 Watts per hour. Typically, the National average for power stands at 13 cents for every kilowatt-hour.
No, you shouldn't leave your pool heater running all the time. Not only will it increase your electricity bill, but it will put unnecessary stress on your pool heater. Instead, you should run your pool heater to cycle when necessary during the day. That way, your pool will be warm throughout the day and night.
A pool heat pump should not be left running all the time. For one, you are wasting electricity by keeping it on when your pool is already warm enough. Also, this will lead to an increase in energy costs month after month.
Water Temperature
Using the heater only when the water dips below a certain point keeps the energy consumption down. For the average person, a pool that is 78 degrees or higher is comfortable. If you are trying to save money or energy, run your heater only when the pool water temperature dips below 78.
— People have been diving to the Titanic's wreck for 35 years. No one has found human remains, according to the company that owns the salvage rights.
Based on their models, the researchers found that the global average temperature from 19,000 to 23,000 years ago was about 46 degrees Fahrenheit. That's about 11 degrees Fahrenheit (6 degrees Celsius) colder than the global average temperature of the 20th century, per a University of Michigan statement.