Seaham, NSW
By Lauren McCaleb · Reviewed by Dylan Duncan ·
More advantaged than the national average
Seaham is more socio-economically advantaged than about 65% of the 14,462 Australian suburbs we score, based on the ABS SEIFA index (raw score 1013, 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.
Seaham at a glance
- Population (2021)
- 1,011
- Median age
- 41
- Median weekly household income
- $2,312
- SEIFA score
- 1013
- Coordinates
- -32.6714, 151.7020
Seaham demographics (2021 Census)
The figures below profile Seaham 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 33%, 7% of homes are rented, and 6% of residents were born overseas.
Age profile
| Age group | People | Share |
|---|---|---|
| Children (0–14) | 200 | 20% |
| Youth (15–24) | 156 | 15% |
| Young adults (25–44) | 182 | 18% |
| Mid-life (45–64) | 334 | 33% |
| Seniors (65+) | 136 | 13% |
Share of the 1,008 people counted by age.
Housing and households
| Tenure | Dwellings | Share |
|---|---|---|
| Owned outright | 136 | 41% |
| Owned with a mortgage | 168 | 50% |
| Rented | 24 | 7% |
| Dwelling type | Dwellings | Share |
|---|---|---|
| Houses | 322 | 99% |
| Townhouses & semis | 0 | 0% |
| Flats & apartments | 4 | 1% |
Tenure and dwelling shares are of the roughly 326 occupied private dwellings in Seaham.
- Median weekly rent
- $360
- Median monthly mortgage
- $2,149
- Average household size
- 3.1 people
- Median weekly family income
- $2,454
- Median weekly personal income
- $839
Community and culture
- Born overseas
- 60 (6%)
- Speaks a language other than English at home
- 9 (1%)
- Aboriginal and/or Torres Strait Islander
- 44 (4%)
Work and education
- Completed Year 12
- 356 (46%)
- Labour-force participation
- 68.8%
- Unemployment rate
- 3.9%
- Employed full-time
- 323
- Employed part-time
- 170
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 Seaham
Based on 2014–2023 records, the warmest month in Seaham is January (average daytime high around 29.2°C) and the coolest is July (around 17.3°C). The area receives roughly 860 mm of rain across the year.
| Month | Avg high | Avg low | Rain |
|---|---|---|---|
| Jan | 29.2°C | 19.6°C | 75 mm |
| Feb | 27.9°C | 19.2°C | 90 mm |
| Mar | 26.2°C | 18.1°C | 145 mm |
| Apr | 23.4°C | 14.6°C | 70 mm |
| May | 20.2°C | 11.3°C | 37 mm |
| Jun | 17.3°C | 9.2°C | 59 mm |
| Jul | 17.3°C | 8.1°C | 52 mm |
| Aug | 18.6°C | 8.5°C | 44 mm |
| Sep | 21.6°C | 10.9°C | 52 mm |
| Oct | 24.5°C | 13.7°C | 86 mm |
| Nov | 26.1°C | 15.7°C | 72 mm |
| Dec | 28.2°C | 18°C | 78 mm |
Climate normals, 2014–2023 (Open-Meteo, ERA5 reanalysis).
Common questions about Seaham
Where is Seaham?
Seaham is a suburb of New South Wales, Australia.
What is the population of Seaham?
At the 2021 Census, Seaham had a population of about 1,011.
Is Seaham an advantaged area?
Seaham has an ABS SEIFA score of 1013, where about 1000 is the national average — higher scores indicate greater relative socio-economic advantage. That gives it a Suburb Score of 65 out of 100 — more socio-economically advantaged than about 65% of Australian suburbs.
What is the weather like in Seaham?
Seaham has average daytime highs of about 23.4°C and overnight lows of about 13.9°C, with roughly 860 mm of rain across the year (based on 2014–2023 climate normals).
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