Sirius Cove Dog Beach: Off-Lead Hours and Rules

What Sirius Cove is

Sirius Cove is a small bay on the Mosman side of Sydney Harbour, with a sandy beach at its head and a reserve behind it. Mosman Council calls the reserve Sirius Park and Foreshore and lists it on Sirius Cove Road, Mosman. On its parks and reserves page, the council describes it as a rest and recreation park with a bushland and foreshore reserve, and lists a car park and street parking, play equipment, fishing, a two-plate electric barbecue, toilets, change rooms, seating, sailing and bushwalking.

So it is not only a dog beach. Families come for the playground and barbecue, people fish, and walkers pass through on the bush tracks. The dogs are the reason most people search for it, though, because Mosman has banned dogs from almost every other beach in the area.

Off-lead hours at Sirius Cove

Mosman Council lists Sirius Cove under three headings on its dog page: areas where unleashed dogs are permitted on the beach and in the water, areas for dogs to swim, and (as Sirius Park) the grassed areas for off-lead exercise. All three run to the same timetable.

Source: Mosman Council, Where to Walk Your Dog. Checked November 2026.

Two details trip people up. First, the weekend window is about time, not place: at 9am on a Saturday the whole beach, water and grass switch to on-lead, and they switch back at 4pm. Second, unlike Clifton Gardens around the headland, Sirius Cove does not have separate daylight saving hours. The 9am and 4pm weekend times apply all year.

Outside the off-lead times, Mosman's rule is that a dog must be on a lead whenever it is outside your property and not in a designated off-lead area. On a busy weekend middle of the day, you may find it easier to visit another time than to manage a dog on a lead around picnics.

Getting there and parking

Drive to the end of Sirius Cove Road in Mosman. The council lists a car park and street parking for the reserve. It does not publish the number of spaces or any time limits on its parks page, so read the signs when you arrive. On a fine weekend the before-9am off-lead window draws dog owners in at the same time, so the car park can fill early.

For public transport, Mosman is served by ferries and buses, but we have not found an official route guide to the cove itself. Use the Transport NSW trip planner with “Sirius Cove Road, Mosman” as the destination, and check the current rules for travelling with a dog before you set off.

What Sirius Cove is like for a dog

Harbour water, not surf. Sirius Cove is a small bay inside Sydney Harbour, a long way from the ocean swell at the Heads. There are no surf waves, which makes it a far gentler swim than an ocean beach. Boats and wind can still make small ripples, and the depth changes with the tide.

Beach, water and grass all in one. Many Sydney dog areas are either a beach or a park. Sirius Cove is both: a dog can swim, roll in the sand, then dry off running on the grass at Sirius Park, all inside the same off-lead hours.

Not fenced. The reserve is open to the road and to the bush tracks. A dog that runs off can end up on Sirius Cove Road or on a track heading out of the reserve. Recall matters here.

Shared with families. The playground, barbecue and picnic tables draw families, and the 10-metre rule around play equipment and tables applies even when your dog is off-lead. A dog that steals sausages or jumps on toddlers is not under effective control, so keep a food-mad dog well away from the barbecue area.

Bush behind the beach. The council lists bushwalking at the reserve. Bushland is where paralysis ticks live (more on that below), and some harbour foreshore land near Mosman is national park, where dogs are banned.

The rules on the day

These are from Mosman Council's dog page:

• Effective control, always. Even off-lead, a dog must be under the effective control of a competent person and must not become a nuisance or spoil other people's use of the park. That applies while swimming too.
• Watch your dog. The council's words: “Always keep watch on your animal.” No phone-scrolling while your dog is out of sight.
• Pick up immediately. Faeces must be removed from reserves, parks, footpaths and roads straight away.
• Playground and table buffer. Dogs are not permitted within 10 metres of children's playground equipment or tables in all Mosman reserves.
• On-lead outside the off-lead area. Clip on before you leave the reserve, and on weekends between 9am and 4pm.
• Signs rule. Off-lead areas in Mosman are signposted with where dogs may be on and off the lead. Read the sign at the entry.

If you need to report a problem, such as a dog attack, the council lists a rangers line, (02) 9978 4081, on its contact details. NSW dog law comes from the Companion Animals Act 1998, which lets each council set its own off-lead areas.

Staying safe at Sirius Cove

Water quality after rain. We could not find a current Beachwatch grade for Sirius Cove. The NSW Government's State of the Beaches report for 2010 to 2011 records that a swim site listed as Little Sirius Cove was removed from harbour water monitoring in 2009 to 2010, because Mosman Council did not endorse it as a swimming location. Without a site-specific result, use the general rule: Beachwatch advises avoiding swimming in estuaries, which includes the harbour, for up to three days after heavy rain. Stormwater runs into small bays like this one. After a storm, let your dog run on the grass instead of swimming, and rinse it with fresh water after any swim.

Paralysis tick. The paralysis tick is native to coastal NSW and a year-round risk in Sydney, with a peak in spring and summer (about August to February). The bushland around Sirius Park is exactly the kind of place ticks wait on low plants. Check your dog by hand after every visit, especially the head, neck, ears and between the toes, and ask your vet about year-round prevention. Wobbly back legs, a changed bark, vomiting or laboured breathing are an emergency. The RSPCA Knowledgebase lists the signs.

Heat. Sydney averages around 26 degrees in January, with humid heatwave days over 35 degrees. On weekdays the beach is off-lead all day, but that does not make midday in summer a good idea. Go early or late, test the sand with the back of your hand, bring fresh water and a bowl, and never leave a dog in a parked car.

Fishing gear. The council lists fishing as an activity at the reserve. Watch for hooks, line and bait on the sand and rocks. If your dog swallows a hook, go to a vet rather than pulling the line.

Other dogs. Sirius Cove is popular, and popular off-lead areas bring every kind of dog together. If your dog is nervous or reactive, choose a quiet weekday and keep space from groups of dogs playing.

Know your emergency vet. The Small Animal Specialist Hospital (SASH) runs 24/7 emergency services in Sydney, including at North Ryde. Save the closest emergency hospital in your phone before you go.

Best times to go, and what to bring

Weekdays are the easy choice: off-lead all day, with no clock to watch. A weekday early morning or late afternoon gives you cooler sand and fewer picnics.

Weekends mean squeezing into the windows before 9am and after 4pm. Plan to arrive early so you are not still parking when the on-lead time starts, and remember that at 9am sharp everyone needs to clip on. In winter the after-4pm window is short before dark.

• A lead for the walk in and out, and for weekend middays. A long line for a dog still learning recall.
• Fresh water and a bowl, so your dog does not drink harbour water.
• Plenty of poo bags.
• A towel and a car seat cover, and fresh water to rinse off salt at home.
• A floating toy if your dog swims. Throw it parallel to the shore, away from boats and other swimmers.

Is Sirius Cove right for a newly adopted rescue dog?

For a dog that has settled in and comes when called, Sirius Cove is a lovely outing: calm water, sand and grass all together. For a dog in its first weeks home, it asks a lot. There are other dogs, children, food smells, birds and an unfenced edge, all at once, and a rescue dog that has just changed homes may not know its name or trust you to come back to yet.

1. Read the rescue's notes. Adoption profiles often say how a dog gets on with other dogs and children, and some say a dog is not ready for off-lead areas. Take that seriously; the shelter or foster carer knows the dog better than you do in week one.
2. Pick a quiet weekday. The weekend off-lead windows concentrate dogs into a few hours. A weekday morning is calmer for a first visit.
3. Start on a long line. Let your dog paddle and sniff on a long line while you practise recalls with good treats. Unclip only once it comes back every time.
4. Keep it short. Twenty minutes and a calm walk back to the car beats an hour that ends with an overwhelmed dog.
5. Read the body language. A tucked tail, freezing, hiding behind you or stiffening around other dogs means it is time to go.
6. Greyhounds need extra care. NSW has specific rules for pet greyhounds off-lead, so read our greyhound off-leash and recall guide before unclipping one.

Before any off-lead outing, check that your dog is microchipped and registered with your current phone number on the NSW Pet Registry. Our Sydney dog registration guide explains how it works for rescue adopters.

Nearby alternatives to Sirius Cove

If Sirius Cove is busy or it is a weekend middle of the day, these are the nearest options. Full hours for every Sydney dog beach are in our guide to Sydney dog beaches.

• Spit West and Spit East Reserves, Mosman. The same beach-and-water times as Sirius Cove: all day on weekdays, before 9am and after 4pm on weekends and public holidays. On the grass at Spit Reserve (West), off-lead is excluded on Saturdays from 8:30am to 2:30pm.
• Clifton Gardens, Mosman. Beach and water east of the jetty only, on weekdays: before 9am and after 4pm in winter, and before 9am and after 6pm during daylight saving (October to March).
• Rosherville Reserve, Mosman. A grassed off-lead area with the same times as Sirius Park, if you just want a run.
• Sandy Bay, Clontarf. Across Middle Harbour, Northern Beaches Council permits dogs off-lead above the mean high water mark with no time limit listed.
• Rose Bay Foreshore. On the other side of the harbour, Woollahra Council lists the foreshore between Dumaresq Reserve and Percival Park as off-lead at all times.

Mosman also has grassed off-lead parks that are not beaches, such as Rawson Park, Lawry Plunkett Reserve and Reid Park, each with its own exceptions on the council page. For grass across Sydney, see our guide to Sydney dog parks and off-lead areas.

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