Great Mackerel Beach is a suburb about 43 kilometres north of the Sydney central business district, from 2016 in the local government area of Northern Beaches Council, Sydney, New South Wales, Australia, formerly part of Pittwater Council. It is on the western shores of Pittwater in Ku-ring-gai Chase National Park, beside Currawong Beach, and near Coasters Retreat and Palm Beach. The population was 36 at the 2016 census; the median age was 66, with an average of 0.3 children per family and an average of 2 people per household. The population was 301 at the 2011 census, and 103 in 2006. Currently[when?] there are 55 permanent residents in 27 properties, with many additional residents occupying properties throughout school holidays and weekends.
Nearby Currawong Beach is sometimes called Little Mackerel Beach.
The Mackerel valley was formed by a creek that flows from within the National Park, passing through sub-tropical rain forest and mangroves to exit at the north end of the beach where a sand delta has been formed. The sand on the beach is the result of sandstone flowing down the Hawkesbury River Hawkesbury River and is soft and golden.
Mackerel was originally a dairy farm settled in 1823 by a John Clark who sold it on to Martin Burke who is known as "The Father of Pittwater". Subdivision of Mackerel took place in 1920 and since then over 100 houses have been built. Originally most of the houses were fibro shacks built as fishermen’s cottages and weekenders. However much development has occurred since and now Mackerel has a large variety of homes ranging from some of the original shacks to waterfront mansions.
Mackerel Beach is largely considered a "holiday home haven",  but it is increasingly seen as a beachside suburb, although access to central Sydney CBD requires a boat (private, ferry, water taxi) followed by a 43km road journey.
The Northern Beaches Council says "there are no public facilities at Mackerel Beach". Electricity and telephone (and hence Internet) connection are available, but there is no water supply and no sewerage - houses have water tanks to collect rainwater for all purposes, and septic tanks. Residents' rubbish is collected twice weekly from containers at the wharf.
Great Mackerel Beach has no road access and no roads or vehicles; access is by the Palm Beach Ferry,water taxi, or private boat. Access to Sydney is normally by a short boat (private or ferry) trip to Palm Beach, then a 43km journey by car or bus. Cars may be left parked near the ferry terminal at Palm Beach.
There are no public facilities for use by visitors or residents at Great Mackerel Beach, including shops, toilets, barbecue or picnic facilities, or availability of drinking water. There is a public telephone booth near the wharf. Residents' rubbish is collected twice weekly, but there is no public facility. Limited shopping facilities are available via a short boat ride to Palm Beach, and there are more comprehensive shops in the surrounding area.
While many residents have boats, there are no moorings available for visiting recreational boating at Great Mackerel Beach, including no Commercial/Club (orange) or Courtesy (pink) moorings. Visiting recreational boats may not tie-up on Great Mackerel Beach Wharf. Private (yellow) moorings may not be used by non-owners and may not be sublet or traded in any way.
The Mackerel Beach Association is a group of about sixty five property-owners who represent the wider community (especially with Council) on issues such as parking, garbage collection and other issues of import to the community.
Due to its position bordering the Ku-ring-gai National Park, pet dogs have historically been prohibited from Mackerel Beach, as they are at The Basin and Currawong and other communities positioned along the western foreshores of Pittwater. Mackerel Beach is a Wildlife Protection Area (WPA); a major concern is protection of indigenous wildlife.
In 2007 some residents asked the MBA for a leash-free area on the south end of the beach. This was rejected by the MBA at the AGM; the residents then raised the request with Pittwater Council, which decided to run a six-month trial of a Public Dog Exercise Area (PDEA) at the north end of the beach. Many residents disagreed with this decision. The area defined by the PDEA prohibited dogs from being walked past the northernmost house, as this region constitutes part of Ku-ring-gai Chase National Park, home to many native mammals, reptiles and bird species.
In 2008 the National Parks and Wildlife Service submitted a report to Pittwater Council that advised against a PDEA at Mackerel Beach.
In December 2009 Pittwater Council resolved to permanently allow dogs off leads at Mackerel Beach between the public wharf north to the last house/National Park boundary, at certain times and with restrictions. The regulations are difficult to enforce in sparsely-populated and isolated Mackerel Beach. A man was injured by an attack from a dog on a leash in 2012.
Cats are prohibited in WPAs; Pittwater Council banned pet cats from Mackerel Beach due to their impact on the native wildlife.
- "2016 Census QuickStats: Great Mackerel Beach". Censusdata.abs.gov.au. 27 June 2016. Retrieved 11 July 2017.
- "Great Mackerel Beach". Geographical Names Register (GNR) of NSW. Geographical Names Board of New South Wales. Retrieved 31 May 2013.
- "2011 Census QuickStats: Great Mackerel Beach". Censusdata.abs.gov.au. Retrieved 3 June 2017. 2016 census data are available from mid-2017
- "2006 Census QuickStats: Great Mackeral (sic) Beach". Censusdata.abs.gov.au. Retrieved 3 June 2017.
- Mackerel is surrounded on three sides by the Ku-ring-gai Chase National Park, with a beach leading to the water Pittwater. The suburb of Currawong Beach adjoins to the south. T and offers residents a year round holiday lifestyle, isolated from the hustle and bustle of the city, yet only a 10-minute boat ride back to "the mainland". The beach is soft golden sand and is ideal for swimming as the southern end becomes deep quite quickly and the northern end has a lovely large sandbank which gradually protrudes into the water Great Mackerel Beach Reserve. Pittwater Council. Pittwater.nsw.gov.au. Retrieved on 2012-02-01.
- Kate Burke (2 December 2016). "Sydneysiders look to remote Great Mackerel Beach for affordable lifestyle". domain.com. Retrieved 4 June 2017.
- Kathryn Welling, Manly Daily (8 August 2014). "Sydney waterfront for less than $1million". News.com. Retrieved 4 June 2017.
Only 30 of the houses are permanently lived in, the rest are weekenders"
- Peter Devlin (6 December 2016). "The 'secret' Sydney beachside suburb where you can buy a home for $600,000 - but there's a catch". Daily Mail Australia. Retrieved 4 June 2017.
- "Great Mackerel Beach House Prices & Property Trends". propertyvalue.com.au. Retrieved 4 June 2017.
- "Pittwater-Mackerel Beach". Northern Beaches Council. Retrieved 4 June 2017.
- "Google Maps". Google Maps. Retrieved 4 June 2017. Google Maps shows no roads into Mackerel Beach. Mackerel Trail, and the trails in Mackerel Beach, are not suitable for motor vehicles.
- "Palm Beach Ferries". Fantasea Cruising. Retrieved 4 June 2017.
- "Mooring types". Roads and Maritime Services- New South Wales. Retrieved 3 June 2017.
Only approved vessels are able to secure to a private, commercial/club or emergency mooring. Penalties apply for non-compliance.
- "Private Moorings". Roads and Maritime Services- New South Wales. Retrieved 3 June 2017.
- "Offshore Living - Associations". West Pittwater Community Association. Retrieved 4 June 2017.
- Pittwater Council: Wildlife Protection Areas and Dogs in Public Areas – Mackerel Beach, 17 December 2007
- "Pittwater-Exercise Areas". Northern Beaches Council -. Retrieved 4 June 2017.
- "Man loses thumb in dog attack". Manly Daily. 18 January 2012. Archived from the original on 20 March 2012. Comments to this article complain that residents and day-trippers allow dogs off-leash without restriction, and that no action is taken.