Port Willunga flood map & planning overlays
A planning-constraint profile of Port Willunga
(City of Onkaparinga, SA) - 2.24 km², mapped from live council and
state overlay data. This suburb is highly constrained.
Profile updated 3 October 2026.
Suburb-wide figures; the free map shows which overlays touch your lot.
Constraint readout
2.24 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Port Willunga's boundary, with the flood, bushfire and environmental overlays drawn on top. Magenta is where aircraft were observed in the sampled period, brightest below 3,000 ft.
Nearby suburbs, nearest first
Aircraft noise and flight paths over Port Willunga
Two different things, kept apart on purpose. The ANEF contour is the planning instrument - a forecast published per airport that planning schemes use to control noise-sensitive development. Observed overflight is what a sampled aircraft-tracking feed actually recorded over the suburb - where aircraft flew, how low and how often.
Observed overflight - sampled 4 Sep to 3 Oct 2026
typical observed square 1 a day
Night movements: not established - night is sampled as often as day, but too few night flights have been seen here to conclude either way.
Traffic is sampled rather than watched continuously, so every figure is a floor: aircraft not captured between samples are not represented. Rates are per 500 m square - the busiest square in the suburb, not a count of flights over the suburb - and a square is only rated where enough traffic was seen to measure it. Altitudes are above mean sea level. Flight paths change with runway use, weather, season and airspace design. This is a record of observed traffic; it is not a noise contour and not a planning control.
Port Willunga at a glance
How Port Willunga is zoned
Selling in Port Willunga? The zone and overlays on this page are the Planning and Design Code controls a Form 1 vendor's statement has to disclose.
Across its 2.24 km², Port Willunga is highly constrained by planning overlays. About 7% of the suburb sits within a mapped flood overlay, and 90% is flagged bushfire-prone. There are 16 heritage-listed sites on record, and the dominant land-use zone is General Neighbourhood. The median lot measures about 703 m² across 1,186 parcels.
Who lives in Port Willunga
Census 2021 figures published by the ABS for the Port Willunga suburb boundary itself, not a wider region.
Socio-economic standing
ABS SEIFA 2021 ranks every Australian suburb. Decile 1 is the most disadvantaged tenth of the country, decile 10 the least.
Score 932, and decile 3 within South Australia. The national average is 1000.
Age profile
Share of Port Willunga's 1,785 residents in each ABS age band.
Population trend, 2001 to 2025
Estimated resident population of Aldinga, the wider ABS statistical area containing Port Willunga. There is no annual population series published at suburb level, so this describes the surrounding area rather than Port Willunga itself.
8,373 in 2001 to 17,041 in 2025, up 104%.
Source: ABS Census 2021 and SEIFA 2021 (Suburbs and Localities), Regional Population (SA2), CC BY 4.0. Small counts are randomly adjusted by the ABS.
Port Willunga data sources and coverage
“Not mapped” means we hold no source layer for this suburb - never an all-clear.
| Dataset | Coverage | Publisher |
|---|---|---|
| Flood mapping | Mapped | the South Australian Planning and Design Code and Location SA spatial data |
| Bushfire-prone mapping | Mapped | the South Australian Planning and Design Code and Location SA spatial data |
| Zoning | Mapped | the South Australian Planning and Design Code and Location SA spatial data |
| Heritage and environment | Mapped where published | the South Australian Planning and Design Code and Location SA spatial data |
| Aircraft noise contours (ANEF) | Not held | the South Australian Planning and Design Code and Location SA spatial data, Defence |
| Observed flight paths | Observed | adsb.lol, under the Open Database License |
| Demographics | Available | Australian Bureau of Statistics (2021 Census and SEIFA) |
Profile last materially updated 3 October 2026. See the methodology and full source list. Source data changes over time and critical decisions should be checked with the responsible authority.
Check a specific Port Willunga address
See exactly which overlays touch a single property - the interactive map is free. Need it on paper? A full planning PDF is just $9.
Aircraft have been seen below 3,000 ft over about 65% of Port Willunga. The report's Aircraft Overflight page narrows that to the address itself: how many aircraft a day, how low, and at what heights.
Building or pricing a slab? The $119 geotechnical desktop report covers geology, soils, bores and an indicative AS 2870 site class for a Port Willunga lot.
See what's in the $9 report →Port Willunga planning - frequently asked
Is Port Willunga flood-prone?
About 7% of Port Willunga falls within a mapped flood overlay, against the council-wide suburb average of 4%.
Is Port Willunga bushfire-prone?
Around 90% of Port Willunga is mapped as bushfire-prone, compared with a City of Onkaparinga average of 69%.
Is Port Willunga under a flight path?
Aircraft were observed below 3,000 ft over about 65% of Port Willunga, and over about 90% at any altitude up to 10,000 ft, in the period sampled (4 Sep 2026 to 3 Oct 2026). The lowest measured aircraft was at 500 ft, with an average of 1,500 ft. At the busiest point in the suburb about 2 aircraft a day were recorded passing over one 500 m square. Traffic is sampled rather than watched continuously and flight paths change with runway use, weather and season; the ANEF contour is the planning instrument.
What is the zoning in Port Willunga?
The dominant planning zone in Port Willunga is General Neighbourhood, though the suburb also includes Open Space and Conservation.
Does Port Willunga have heritage-listed places?
Port Willunga has 16 heritage-listed places on record.
What is the typical lot size in Port Willunga?
Across 1,186 surveyed parcels in Port Willunga, the median lot size is about 703 m².
Does Port Willunga have a train station?
There is no train station inside Port Willunga itself. The suburb is served by 14 bus stops.
What is the population of Port Willunga?
At the 2021 Census Port Willunga had 1,785 usual residents, with a median age of 44 and an average household size of 2.3 people. The wider Aldinga statistical area, which contains Port Willunga, went from 8,373 people in 2001 to 17,041 in 2025, up 104%.
Is Port Willunga an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Port Willunga scores 932 and sits in decile 3 of 10 nationally and decile 3 within South Australia (decile 1 is the most disadvantaged tenth, decile 10 the least).
What is the median household income in Port Willunga?
Median household income in Port Willunga was $1,313 a week at the 2021 Census, against $1,512 for the typical suburb in City of Onkaparinga. Median rent was $328 a week and the median mortgage repayment $1,300 a month.
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Aldinga | 2.2 km | 1% | 99% |
| Maslin Beach | 3.2 km | 0% | 98% |
| Aldinga Beach | 4.0 km | 10% | 78% |
| Tatachilla | 4.6 km | 0% | 100% |
| Whites Valley | 4.8 km | 0% | 100% |
| Moana | 5.7 km | 11% | 92% |
| Seaford Rise | 6.2 km | 3% | 51% |
| Seaford Heights | 7.3 km | 0% | 67% |
| Seaford | 8.1 km | 0% | 35% |
| Sellicks Beach | 8.4 km | 4% | 97% |