Seacliff, SA
By Lauren McCaleb · Reviewed by Dylan Duncan ·
Seacliff is a coastal suburb at the southern end of Adelaide's metropolitan beaches, within the City of Holdfast Bay and bordering Marino and Kingston Park. The land belongs to the Kaurna people, the traditional owners of the Adelaide plains, who knew the coast by names tied to the peppermint gums and reedy ground near the shore. European settlement followed Colonel William Light's arrival in 1836, when he sheltered in the bay he named Holdfast Bay. The suburb is known today for its swimming, surfing and snorkelling, with the offshore Seacliff Reef a favourite spot for divers seeking leafy seadragons and other marine life. The historic Brighton and Seacliff Yacht Club, founded in 1919, still sits on the Esplanade, and protected dunes shelter the threatened hooded plover.
Among Australia's more advantaged suburbs
Seacliff is more socio-economically advantaged than about 88% of the 14,462 Australian suburbs we score, based on the ABS SEIFA index (raw score 1064, where about 1000 is the national average).
A socio-economic measure from ABS Census data — not a measure of how good a suburb is to live in or visit. How we calculate this.
Seacliff at a glance
- Population (2021)
- 2,117
- Median age
- 46
- Median weekly household income
- $1,931
- SEIFA score
- 1064
- Coordinates
- -35.0317, 138.5206
Seacliff demographics (2021 Census)
The figures below profile Seacliff using the Australian Bureau of Statistics 2021 Census; every percentage is a share of a clearly stated Census count, so each one traces back to the source. At a glance, the largest age group is mid-life (45–64) at 29%, 24% of homes are rented, and 24% of residents were born overseas.
Age profile
| Age group | People | Share |
|---|---|---|
| Children (0–14) | 336 | 16% |
| Youth (15–24) | 206 | 10% |
| Young adults (25–44) | 483 | 23% |
| Mid-life (45–64) | 614 | 29% |
| Seniors (65+) | 478 | 23% |
Share of the 2,117 people counted by age.
Housing and households
| Tenure | Dwellings | Share |
|---|---|---|
| Owned outright | 351 | 42% |
| Owned with a mortgage | 280 | 33% |
| Rented | 200 | 24% |
| Dwelling type | Dwellings | Share |
|---|---|---|
| Houses | 556 | 66% |
| Townhouses & semis | 167 | 20% |
| Flats & apartments | 113 | 13% |
Tenure and dwelling shares are of the roughly 843 occupied private dwellings in Seacliff.
- Median weekly rent
- $350
- Median monthly mortgage
- $1,950
- Average household size
- 2.4 people
- Median weekly family income
- $2,364
- Median weekly personal income
- $948
Community and culture
- Born overseas
- 485 (24%)
- Speaks a language other than English at home
- 166 (8%)
- Aboriginal and/or Torres Strait Islander
- 12 (1%)
Work and education
- Completed Year 12
- 1,180 (69%)
- Labour-force participation
- 62.8%
- Unemployment rate
- 4.5%
- Employed full-time
- 597
- Employed part-time
- 402
Source: ABS Census of Population and Housing, 2021 (General Community Profile, by Suburb and Locality). © Australian Bureau of Statistics, released under CC BY 4.0. How we group bands and derive each share is set out on our methodology page.
Weather and climate in Seacliff
Based on 2014–2023 records, the warmest month in Seacliff is January (average daytime high around 27.9°C) and the coolest is July (around 14°C). The area receives roughly 711 mm of rain across the year.
| Month | Avg high | Avg low | Rain |
|---|---|---|---|
| Jan | 27.9°C | 17.5°C | 29 mm |
| Feb | 26.5°C | 17°C | 29 mm |
| Mar | 24.7°C | 16°C | 20 mm |
| Apr | 21.4°C | 14°C | 51 mm |
| May | 17.3°C | 11.7°C | 86 mm |
| Jun | 14.8°C | 9.6°C | 100 mm |
| Jul | 14°C | 8.9°C | 104 mm |
| Aug | 14.7°C | 8.8°C | 95 mm |
| Sep | 17.2°C | 10.2°C | 62 mm |
| Oct | 20.5°C | 11.9°C | 52 mm |
| Nov | 22.7°C | 13.6°C | 52 mm |
| Dec | 25.6°C | 15.6°C | 31 mm |
Climate normals, 2014–2023 (Open-Meteo, ERA5 reanalysis).
Common questions about Seacliff
Where is Seacliff?
Seacliff is a suburb of South Australia, Australia.
What is the population of Seacliff?
At the 2021 Census, Seacliff had a population of about 2,117.
Is Seacliff an advantaged area?
Seacliff has an ABS SEIFA score of 1064, where about 1000 is the national average — higher scores indicate greater relative socio-economic advantage. That gives it a Suburb Score of 88 out of 100 — more socio-economically advantaged than about 88% of Australian suburbs.
What is the weather like in Seacliff?
Seacliff has average daytime highs of about 20.6°C and overnight lows of about 12.9°C, with roughly 711 mm of rain across the year (based on 2014–2023 climate normals).
Nearby suburbs in South Australia
More suburb guides in South Australia
Other hand-written, cited guides — browse all guides.