How to Winterise Your Pool Properly in Australia

While winter in most parts of Australia isn’t harsh enough to freeze your pool solid, it’s still important to shut things down the right way. Winterising helps protect your equipment, keep algae away, and make reopening your pool in spring much easier.

Here’s your complete step-by-step guide on how to winterise a pool in Australia — with practical tips, product suggestions, and a no-fuss approach that works for both in-ground and above-ground pools.

Why Winterise Your Pool?

If you don’t properly winterise, you could face:

Algae blooms
Equipment damage
Sky-high chemical costs in spring
Cloudy water and blocked filters

A well-winterised pool stays clear, balanced, and low-maintenance — even during the cooler months.

Step 1: Clean the Pool Thoroughly

Start by removing all dirt, leaves, and debris from the pool.

✅ Checklist:

Skim the surface
Brush the walls and floor
Vacuum manually or run your robot on deep clean mode
Empty the skimmer and pump baskets

This prevents debris from decomposing and throwing off your water balance during winter.

Step 2: Balance the Water

Correct water chemistry keeps algae and bacteria at bay.

Target levels:

pH: 7.2–7.6
Alkalinity: 80–120 ppm
Calcium hardness: 200–400 ppm
Chlorine: 1–3 ppm

Use test strips or a digital test kit. Adjust using stabilisers, balancers, or chlorine products from our full range of pool products.

Step 3: Shock the Pool

Use a chlorine shock to kill off any remaining bacteria or organic matter.

Tips:

Add in the evening for best effect
Run the pump for at least 8 hours afterward
Wait 24–48 hours before covering the pool

Shocking creates a clean slate for your winter chemicals to work more effectively.

Step 4: Add a Long-Life Algaecide

Winter algaecides work for up to 3 months and help prevent green outbreaks.

Choose a non-copper, non-foaming algaecide for better clarity and less residue. Always follow the label instructions for dosage.

Step 5: Adjust Filtration Settings

You don’t need to run your pump 8–12 hours in winter.

Step 6: Lower the Water Level (Optional)

In areas with heavy rain or flooding, you may want to lower the water just below the skimmer opening.

Note:

Don’t drain the pool completely — it can shift or crack
Most Aussie pool owners leave water level normal and use an overflow valve instead

Step 7: Cover the Pool

A winter cover:

Keeps out leaves and dirt
Blocks sunlight (reducing algae growth)
Reduces evaporation and chemical loss

Choose a cover designed for winter conditions — not a summer solar blanket. Shop durable covers and accessories in our full pool products section.

Step 8: Maintain During Winter

Even in winter, your pool still needs occasional care.

Monthly tasks:

Check chlorine and pH
Top up chemicals if needed
Remove any debris from the cover or water
Run the filter for a few hours to circulate

If you’re using a winter program chemical pack, you may only need minor top-ups.

Optional: Use a Winter Chemical Kit

Winter kits usually include:

Shock treatment
Algaecide
Stain and scale prevention

These pre-measured packs are ideal for hands-off maintenance during the cooler months.

Can You Still Swim in Winter?

Yes — if you have a heater. Just increase filtration time and check chemical levels more often if your pool is in regular use.

For safety and comfort:

Keep pool temperature around 27°C
Use a cover when not swimming
Maintain chlorine above 1 ppm

Conclusion

Winterising your pool in Australia doesn’t have to be difficult. With the right approach, you can keep your pool clean, balanced, and ready for swimming come spring — without expensive cleanup or repairs.

Need help preparing your pool for winter? Visit our full range of pool products for winter kits, covers, algaecides, brushes, test kits and more.

Frequently Asked Questions

Do I need to winterise my pool in Australia?

Yes — especially if you’re not using it regularly. Winterising helps prevent algae, keeps water balanced, protects equipment and makes reopening your pool much easier in spring.

What chemicals do I need to winterise my pool?

You’ll need a chlorine shock, long-lasting algaecide, and water balancers (pH, alkalinity, calcium). Optional winter chemical kits combine everything in one pack for convenience.

How long should I run my pool pump in winter?

Reduce pump run time to 2–4 hours per day in winter. Run it during the warmest part of the day to help circulation and maintain chemical efficiency.

Should I lower the water level when winterising?

In areas with heavy rain or overflowing risk, you can lower the water just below the skimmer. Otherwise, it’s fine to leave it at normal level if your pool has an overflow outlet.

Can I use a summer cover during winter?

No. Solar covers are designed to trap heat — not protect against algae or debris. Use a proper winter pool cover that blocks sunlight and keeps dirt out.

Do I still need to add chlorine during winter?

Yes — just less often. Test your water monthly and add chlorine if it drops below 1 ppm. Winter algaecides can reduce the need for frequent top-ups.

How do I prevent algae in my pool over winter?

Balance the water, shock the pool before closing, and add a winter algaecide. Keep the pool covered and run the filter occasionally to prevent stagnation.

What happens if I don’t winterise my pool?

You may face algae blooms, cloudy water, stained surfaces, and damaged equipment. Proper winter care avoids expensive cleanup and water treatment later.

Can I still swim if the pool is winterised?

Yes — if it’s heated and the water is balanced. Just check chemicals more often and increase the filtration time if swimming regularly.

Where can I buy winter pool supplies in Australia?

You’ll find winter covers, shock treatments, algaecides, kits and more in our full [pool products](https://www.pumpandpoolpeople.com.au/) range. We stock quality gear for winter care and year-round maintenance.