Perth watering days 2026 explained

If your sprinklers haven't fired this week and you're not sure why, the cause is almost always the watering roster. Water Corporation sets which days each Perth household can water by postcode, plus a winter ban that shuts everything off from June through August. The rules are simple once you know them. This page lays them out.

To check your specific watering days right now, look up your suburb on the homepage - it pulls the current roster from the Water Corp schedule.

The short version

• Two days a week for scheme water customers on the standard Perth metro roster.
• No watering 9am to 6pm from 1 September to 31 May.
• Winter sprinkler ban: no scheme-water sprinklers at all from 1 June to 31 August.
• Bore users: exempt from the day roster, but the 9am-6pm daytime ban and winter ban don't apply the same way. See the bore section below.
• Hand watering with a trigger nozzle or watering can is allowed any day, any time.

How the roster is set

Water Corporation splits Perth and Peel into rostered watering groups based on the last digit of your home's street number. Your two permitted days are fixed - they don't rotate. They're the same two days every week, every year, unless Water Corp publishes a change.

Last digit of street number	Watering days
0 or 1	Wednesday and Saturday
2 or 3	Thursday and Sunday
4 or 5	Friday and Monday
6 or 7	Saturday and Tuesday
8 or 9	Sunday and Wednesday

Units, flats, and properties without a clear street number default to the day pattern for "0". If you share a driveway with multiple house numbers, use the number on your water bill.

This is the standard metro roster. Some outer-metro and Peel postcodes run on a separate schedule. Check your address on the homepage lookup if you're unsure.

The winter sprinkler ban (1 June - 31 August)

For three months a year, scheme-water sprinklers across Perth and Peel are switched off entirely. This is a hard ban, not a guideline. The rationale is that evapotranspiration drops far enough in Perth winter that established lawn and garden don't need irrigation - rainfall covers it.

What's banned during the winter sprinkler ban window:

• Pop-ups, MP rotators, gear-driven rotors, drip lines on a controller.
• Manual sprinklers connected to scheme water.
• Any automatic irrigation system fed from the mains.

What's still allowed:

• Hand watering with a trigger nozzle or watering can. Any time, any day.
• Reticulation fed from a groundwater bore (see below).
• Newly planted lawn or garden under a Water Corp exemption (see below).

Penalties for breaching the ban start at warnings and escalate to fines. Water Corp does enforce it - if a neighbour reports your sprinklers running on a Tuesday in July, an inspector will turn up.

The 9am-6pm daytime ban (1 September - 31 May)

Outside of winter, you can water on your two rostered days, but only before 9am or after 6pm. The 9am-6pm window is banned year-round during the September-May season.

This rule exists because Perth daytime temperatures from spring through autumn evaporate a large share of any water hitting open ground before it can soak in. Watering at 7am or 7pm puts roughly twice as much water into the soil as watering at noon.

Most Waterwise-endorsed controllers will be programmed for a pre-dawn cycle - typically a start time between 3am and 5am. That avoids the ban window, lets pressure stabilise after overnight mains demand drops, and gives foliage time to dry before sun-up (reducing fungal pressure).

Bore users

If your reticulation is fed from a garden bore registered with the Department of Water and Environmental Regulation, the day-of-week roster doesn't apply to you. You can water any day. However:

• The daytime ban still applies in spirit for water conservation, and many local councils now apply it as a bylaw. Treat 9am-6pm as off-limits.
• The winter sprinkler ban does not apply to bore users, but Water Corp asks bore owners to "use only what your garden needs" through winter. Most established lawn needs zero supplementary water from June to August in Perth.
• If your bore is unlicensed or you've never registered it, you're technically in breach. See the DWER bore registration guidance before assuming you're exempt.

A growing share of new builds in Perth opt for scheme-water-only retic because bores in many suburbs are now drawing iron-stained or hyper-saline water as the superficial aquifer drops. If you're choosing between bore and scheme on a new install, talk to a Waterwise-endorsed installer about your specific suburb.

Exemptions

Water Corp grants short-term exemptions in three main scenarios:

Exemption	Duration	Conditions
New lawn establishment	Up to 28 days	Must be freshly installed turf or seed. Apply before laying.
New garden establishment	Up to 6 weeks	New planting only. Doesn't cover replanting in existing beds.
System repair/testing	Per event	After installer repair work, to commission and check coverage.

You apply through Water Corp's exemption form. Approval is straightforward if you're genuinely establishing new turf or garden - they want it to survive too. Don't try to extend an exemption to cover ongoing lawn maintenance. They check.

What counts as "watering"

The roster covers any fixed or automatic delivery of scheme water onto a garden, lawn, or hard surface. So:

• Pop-up sprinklers, rotors, MP rotators, drip line on a timer - rostered.
• A handheld hose with a trigger nozzle, used by a person - any day, any time.
• A watering can - any day, any time.
• A sprinkler on a hose end, left running, not held - rostered.
• Topping up a pool or filling a pond - not rostered, but separate efficiency rules apply.
• Washing a car on the lawn from a trigger-nozzle hose - allowed, the lawn is incidentally watered.

The principle Water Corp applies: a person actively present and controlling flow is unrestricted; an automated or unattended system is rostered.

What if my system runs on the wrong day?

The most common cause is a controller that lost its day-of-week setting after a power cut, or a system that was programmed before the roster changed (Water Corp adjusted some postcode allocations in 2023). Fix it at the controller: re-set the current day, then re-set the watering days to your two permitted days.

If your controller is from a Waterwise-endorsed installer, they'll often re-program it for you at no charge if you flag the issue. If you're not sure which days are yours, check the homepage lookup first.

If the sprinklers run but you have no idea why - the controller looks off, the dial says "off", but they fire anyway - you've likely got a stuck solenoid or a controller fault. That's a reticulation repair call. Find an installer near you on the installer listing.

FAQ

Can I water every day of the week?

No, not on scheme water. The standard Perth metro roster is two days a week, set by your street number. Bore users aren't on the roster but are still expected to follow the daytime ban.

What time can I water?

From 1 September to 31 May, before 9am or after 6pm only. Most installers program controllers for a pre-dawn start between 3am and 5am.

Is the winter sprinkler ban for bores too?

The ban as written applies to scheme-water sprinklers. Bore users aren't legally banned, but Water Corp asks bore owners to switch off through winter because established Perth gardens don't need it.

Can I water new turf outside my rostered days?

Yes, with an approved exemption. Apply through Water Corp before you lay the turf. The exemption typically runs 28 days.

Do I need to water at all in June, July, August?

For established lawn and garden in Perth, almost never. Winter rainfall covers it. If a dry winter week hits and you have very young plants, hand water with a can or trigger-nozzle hose. Don't run the sprinklers.

What happens if I water on the wrong day?

Water Corp issues a warning on a first reported breach. Repeat breaches attract fines. Inspectors do follow up on neighbour reports.

How do I find my watering days?

Use the homepage suburb lookup or check the Water Corporation watering days page. Both pull from the same source.

Bottom line

Two days a week, before 9am or after 6pm, off entirely from 1 June to 31 August. Bore users get more flexibility but should still skip winter. If your system is firing on the wrong day or the wrong time, that's a controller-programming fix, often free if you booked with a Waterwise-endorsed installer.