When Should You Open & Close the Pool

The pool season is that great time of the year when you wake up to a heatwave, and a quick dip in your swimming pool can cool you down. In most parts of the United States, there are about four months in summer with ideal pool weather. Although closing and opening your pool relies on the Weather partially, there is a consensus that May through to September is the main swimming season. So, when should you open & close the pool? As a Long Island pool company we can advise you on the best times to do so.

Swimming Pool Opening Time

The sooner you open your pool, the sooner you will enjoy and relax. Opening the pool in April or May and taking steps to maintain and clean your swimming pool might be the difference between getting ready to face the first heatwave in May and an algae-infested swimming pool that is green and not swimmable.

The key to opening the swimming pool is to avoid leaving it too late when the temperatures are above 15 degrees Celsius. Above these temperatures, you can begin having a problem with algae and bacteria. People consider Memorial Day Weekend as the pool season’s kickoff period. Opening the pool several weeks before Memorial Day allows a change of water chemistry and pool vacuuming, ensuring a perfect first summer party.

Swimming Pool Closing Time

The closing time for your swimming pool ensures good water quality and reduces the amount of money and time spent getting it to good health in spring. Most customers rely on how their pools are used when assessing the time to close it down.

However, this may prove problematic. It is a poor decision to close your pool early when the weather is still warm. We recommend you leave the pool filtration system running and drop a chlorine tablet..

With the proper heating and filtration system, you could run your pool longer. Therefore, with the appropriate temperature controls, you can vary the closing time for the swimming pool.


Knowing when to close and open the swimming pool is vital to successfully managing it and its water quality. Doing this right will ease the change of seasons and cost you less. If you do it wrong, you may have a lot of work and expenses coming your way.