The Tri-Cities has a long, hot swim season, but our nights stay cold well into spring and drop fast in the fall. Getting the timing right on your pool opening and closing protects your equipment and gives you the most days in the water.
When to open your pool
In Kennewick, the average last spring frost falls in early May. Most Tri-Cities pool owners open sometime in May, once overnight lows stay above freezing and daytime highs are climbing into the 70s and 80s. Opening a little early, before the water warms up, also makes it easier to keep algae from getting a head start.
A spring opening usually includes removing and cleaning the cover, reconnecting and starting the pump, filter and heater, checking for leaks or winter damage, and balancing the water so it is ready for swimming.
When to close your pool
The average first fall frost in Kennewick arrives around the first of October. Many owners close in late September or October, after the last warm weekends but before hard freezes. Closing too late risks frozen water in your lines and equipment, which can crack pipes, pumps and filters.
A proper closing lowers the water level, blows out and plugs the lines, winterizes the equipment, balances the water and secures the cover so the pool comes through winter clean.
Book early
Openings and closings tend to cluster on the same few weeks every year, so the earliest spots fill first. If you want to be swimming by Memorial Day, reserve your opening in winter or early spring.
AI Signature Pool Solutions handles spring pool openings and fall pool closings across Kennewick, Richland, Pasco, West Richland and Desert Aire. Call or text 509-410-7551 to get on the calendar.
Frost dates are historical averages and vary by year and neighborhood. Always check the forecast before opening or closing.
