Semaphore South, SA
By Lauren McCaleb · Reviewed by Dylan Duncan ·
More advantaged than the national average
Semaphore South is more socio-economically advantaged than about 73% of the 14,462 Australian suburbs we score, based on the ABS SEIFA index (raw score 1029, 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.
Semaphore South at a glance
- Population (2021)
- 1,031
- Median age
- 44
- Median weekly household income
- $1,676
- SEIFA score
- 1029
- Coordinates
- -34.8471, 138.4810
Semaphore South demographics (2021 Census)
The figures below profile Semaphore South 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 31%, 29% of homes are rented, and 20% of residents were born overseas.
Age profile
| Age group | People | Share |
|---|---|---|
| Children (0–14) | 162 | 16% |
| Youth (15–24) | 96 | 9% |
| Young adults (25–44) | 255 | 25% |
| Mid-life (45–64) | 316 | 31% |
| Seniors (65+) | 207 | 20% |
Share of the 1,036 people counted by age.
Housing and households
| Tenure | Dwellings | Share |
|---|---|---|
| Owned outright | 147 | 33% |
| Owned with a mortgage | 155 | 35% |
| Rented | 127 | 29% |
| Dwelling type | Dwellings | Share |
|---|---|---|
| Houses | 262 | 60% |
| Townhouses & semis | 147 | 33% |
| Flats & apartments | 30 | 7% |
Tenure and dwelling shares are of the roughly 439 occupied private dwellings in Semaphore South.
- Median weekly rent
- $320
- Median monthly mortgage
- $1,842
- Average household size
- 2.2 people
- Median weekly family income
- $2,352
- Median weekly personal income
- $930
Community and culture
- Born overseas
- 203 (20%)
- Speaks a language other than English at home
- 85 (9%)
- Aboriginal and/or Torres Strait Islander
- 17 (2%)
Work and education
- Completed Year 12
- 495 (59%)
- Labour-force participation
- 65.9%
- Unemployment rate
- 3.7%
- Employed full-time
- 327
- Employed part-time
- 188
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 Semaphore South
Based on 2014–2023 records, the warmest month in Semaphore South is January (average daytime high around 28.7°C) and the coolest is July (around 14.6°C). The area receives roughly 542 mm of rain across the year.
| Month | Avg high | Avg low | Rain |
|---|---|---|---|
| Jan | 28.7°C | 17.4°C | 32 mm |
| Feb | 27.6°C | 17°C | 23 mm |
| Mar | 25.6°C | 15.8°C | 18 mm |
| Apr | 22.4°C | 13.5°C | 48 mm |
| May | 18.1°C | 11°C | 63 mm |
| Jun | 15.4°C | 8.8°C | 67 mm |
| Jul | 14.6°C | 8°C | 64 mm |
| Aug | 15.3°C | 8.1°C | 69 mm |
| Sep | 17.9°C | 9.6°C | 49 mm |
| Oct | 21.6°C | 11.7°C | 42 mm |
| Nov | 23.9°C | 13.4°C | 41 mm |
| Dec | 26.7°C | 15.4°C | 26 mm |
Climate normals, 2014–2023 (Open-Meteo, ERA5 reanalysis).
Common questions about Semaphore South
Where is Semaphore South?
Semaphore South is a suburb of South Australia, Australia.
What is the population of Semaphore South?
At the 2021 Census, Semaphore South had a population of about 1,031.
Is Semaphore South an advantaged area?
Semaphore South has an ABS SEIFA score of 1029, where about 1000 is the national average — higher scores indicate greater relative socio-economic advantage. That gives it a Suburb Score of 73 out of 100 — more socio-economically advantaged than about 73% of Australian suburbs.
What is the weather like in Semaphore South?
Semaphore South has average daytime highs of about 21.5°C and overnight lows of about 12.5°C, with roughly 542 mm of rain across the year (based on 2014–2023 climate normals).
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