Forth flood map & planning overlays
A planning-constraint profile of Forth
(Central Coast, TAS) - 34.95 km², mapped from live council and
state overlay data. This suburb is highly constrained.
Profile updated 26 September 2026.
Suburb-wide figures; the free map shows which overlays touch your lot.
Constraint readout
34.95 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Forth'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 Forth
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 26 Sep 2026
Night movements: observed, lowest 2,000 ft - night is sampled as often as day, but night traffic is light, so this is a floor and no rate can be put on it.
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.
Forth at a glance
How Forth is zoned
Buying in Forth? The zone and code overlays on this page are the Tasmanian Planning Scheme controls a section 337 certificate reports for a title.
Across its 34.95 km², Forth is highly constrained by planning overlays. About 15% of the suburb sits within a mapped flood overlay, and 100% is flagged bushfire-prone. There are 8 heritage-listed sites on record, and the dominant land-use zone is Agriculture. The median lot measures about 7,487 m² across 493 parcels.
Who lives in Forth
Census 2021 figures published by the ABS for the Forth 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 991, and decile 9 within Tasmania. The national average is 1000.
Age profile
Share of Forth's 738 residents in each ABS age band.
Population trend, 2001 to 2025
Estimated resident population of Turners Beach - Forth, the wider ABS statistical area containing Forth. There is no annual population series published at suburb level, so this describes the surrounding area rather than Forth itself.
2,824 in 2001 to 3,700 in 2025, up 31%.
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.
Forth 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 Tasmanian Planning Scheme and the LIST (Land Tasmania) |
| Bushfire-prone mapping | Mapped | the Tasmanian Planning Scheme and the LIST (Land Tasmania) |
| Zoning | Mapped | the Tasmanian Planning Scheme and the LIST (Land Tasmania) |
| Heritage and environment | Mapped where published | the Tasmanian Planning Scheme and the LIST (Land Tasmania) |
| Aircraft noise contours (ANEF) | Not held | the Tasmanian Planning Scheme and the LIST (Land Tasmania), 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 26 September 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 Forth 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 4% of Forth. The report's Aircraft Overflight page narrows that to the address itself: how many aircraft a day, how low, and at what heights.
Published flood models are held here: a Flood Model Report is available for about 390 Forth addresses (+$9 with the planning report).
See what's in the $9 report →Forth planning - frequently asked
Is Forth flood-prone?
About 15% of Forth falls within a mapped flood overlay, against the council-wide suburb average of 10%. Modelled flood depth, velocity and flood level are held for about 390 Forth addresses, from published flood studies; the free check on the Flood Model Report page says whether a model reaches a given address.
Is Forth bushfire-prone?
Around 100% of Forth is mapped as bushfire-prone, compared with a Central Coast average of 96%.
Is Forth under a flight path?
Aircraft were observed below 3,000 ft over about 4% of Forth, and over about 6% at any altitude up to 10,000 ft, in the period sampled (4 Sep 2026 to 26 Sep 2026). The lowest measured aircraft was at 1,500 ft, with an average of 2,500 ft. 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 Forth?
The dominant planning zone in Forth is Agriculture, though the suburb also includes Rural and Environmental Management.
Does Forth have heritage-listed places?
Forth has 8 heritage-listed places on record.
What is the typical lot size in Forth?
Across 493 surveyed parcels in Forth, the median lot size is about 7,487 m².
What is the population of Forth?
At the 2021 Census Forth had 738 usual residents, with a median age of 46 and an average household size of 2.4 people. The wider Turners Beach - Forth statistical area, which contains Forth, went from 2,824 people in 2001 to 3,700 in 2025, up 31%.
Is Forth an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Forth scores 991 and sits in decile 6 of 10 nationally and decile 9 within Tasmania (decile 1 is the most disadvantaged tenth, decile 10 the least).
What is the median household income in Forth?
Median household income in Forth was $1,592 a week at the 2021 Census, against $1,374 for the typical suburb in Central Coast. Median rent was $260 a week and the median mortgage repayment $1,348 a month.
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Abbotsham | 3.7 km | 8% | 100% |
| Forthside Devonport |
3.7 km | 7% | 100% |
| Turners Beach | 4.5 km | 33% | 85% |
| Kindred | 4.9 km | 11% | 100% |
| Ulverstone | 5.0 km | 14% | 69% |
| Spalford | 5.5 km | 8% | 100% |
| Leith Devonport |
5.7 km | 13% | 92% |
| Gawler | 6.4 km | 9% | 100% |
| Lillico Devonport |
6.7 km | 13% | 100% |
| Tugrah Devonport |
6.8 km | 14% | 99% |