The rainy season will soon arrive in Vancouver. So what happens when rainwater and pool water mix? How do you maintain your swimming pool in the wetter months? We cover all the information you need to know about mixing rain and pool water. 

Pool water chemistry 

Rain dilutes the pool water, which can then create an imbalance of chemicals. If your pool is not covered, it is important to check the levels of your pool water after everytime it rains. Rain also affects the acidity of the pool water. The pH of your pool water should be between 7.2-7.8. If your pool water is too acidic, the water can irritate your skin, so adjust your chemicals accordingly.


After it rains, you should test your pool water chemistry with a pool water test kit. There are a few different ways to test your pool which includes 


  • Pool test strips
  • Liquid tests
  • Digital tests


When you are dealing with rain and pool water mixing, knowing how to properly test your chemical levels is vital. Do not feel comfortable with your testing skills? Learn how you properly use a pool test kit here!

Rain and dirt 

When it rains, there will always be a chance of wind, and that wind can bring dirt into your pool. Accumulation of dirt and debris can clog your pool filter and if left for too long, and it can be very hard to clean.


A regular amount of rain will not cause harm to your pool equipment, but with unpredictable weather, it is important to prepare for excessive rainfall. It is essential to protect your pool pump so you will not have to replace it if the water rises above the pad. 

Clean the water

If you do get debris in your pool water, make sure you skim it out as soon as possible. After that is done, clean the pool filter and make sure it is working properly. Shocking your pool might be the answer if the pool water gets too dirty. 

Protecting your pool from a rainstorm 

Fortunately, there are ways to protect your pool from the rain. One way to do this is by using a pool cover. Pool covers are the easiest and most effective way to protect your pool from rain and debris. Once your pool cover is installed, make sure you take care of it with these tips!