Dee Why, NSW 2099 — Suburb Profile
Last reviewed: · By Knowburb Research Team
In short
Dee Why is a coastal suburb on Sydney's Northern Beaches, 18 km from the CBD, featuring Dee Why Beach, Dee Why Lagoon and a major bus interchange on Pittwater Road. It has a population of 23,000 with median age 36, many young professionals and families in high-density housing. Apartments and units comprise over 80% of dwellings, with houses rarer and more expensive.
Snapshot
Demographics
- Population
- 23,354
- Median age
- 36 years
- Median household income
- $2,106 /week
- Median personal income
- $1,065 /week
- Median family income
- $2,460 /week
- Average household size
- 2.3
- Persons per bedroom
- 1.1
- Local government area
- Northern Beaches
- Statistical region (SA4)
- Sydney - Northern Beaches
- Remoteness classification
- Major Cities of Australia
- Federal electorate
- Warringah
Property & cost of living
- Median rent
- $775 /week
- Median monthly mortgage
- $2,457
- Median house price
- $2,828,000
- Rent share of household income
- 37%
Schools
- Dee Why Public School
- St Kevin's Catholic Primary School
- St Luke's Grammar School
Transport
- B-Line express bus to Wynyard
- Pittwater Road bus interchange
Lifestyle & amenities
Coastal suburb with a mix of young professionals, families and renters. Known for Dee Why Beach, lagoon wildlife refuge, commercial strip on Pittwater Road with shopping centres, and proximity to coastal walks. Unit-dominant housing from 1960s-70s with ongoing development; administrative centre of Northern Beaches Council.
- 19 cafés
- 31 restaurants
- 2 pubs and bars
- 79 parks and reserves
- 4 gyms and fitness centres
- 1 library
- 8 supermarkets
- 28 playgrounds
Climate
- Warmest month: Jan (26.0°C avg max)
- Coolest month: Jul (16.4°C avg max)
- Annual rainfall: 1211 mm
- Reference station: Sydney (Observatory Hill), 13.9 km away
NBN & connectivity
Fibre to the Curb serves 44.3% of the 12,470 resolvable premises in Dee Why. Most premises here connect via fibre to a small pit on the kerb, then a short copper run into the home. Speeds up to NBN 250 are available on most addresses.
- Fibre to the Premises: 11.0%
- Fibre to the Curb: 44.3%
- Fibre to the Building: 23.9%
- Hybrid Fibre-Coaxial: 19.1%
- Fibre to the Node: 1.7%
Safety
- Recorded offences: 990 across postcode 2099 in the year to Dec 2025 (down 17% on the prior year).
- Most common categories: 301 violent offences, 278 theft, 121 property damage.
Frequently asked questions
What is the population of Dee Why?
Dee Why (NSW 2099) had 23,354 residents at the most recent ABS Census. The median age is 36. It sits within the Northern Beaches local government area.
What is the median rent in Dee Why?
The median advertised rent in Dee Why is $775/week, based on SQM Research listings data. Rents vary by property type, bedrooms and condition.
Are there schools in Dee Why?
Yes — 3 schools are listed within or near Dee Why. Nearest include: Dee Why Public School, St Kevin's Catholic Primary School, St Luke's Grammar School. School data sourced from ACARA and state education departments.
What NBN technology is available in Dee Why?
Dee Why is predominantly served by Fibre to the Curb (44.3% of premises). Coverage data is sourced from the NBN upgrade map aggregated from NBN Co address checks.
How safe is Dee Why?
Across postcode 2099, 990 offences were recorded in the 12 months to Dec 2025. The most common offence categories were violent (301), theft (278), property damage (121). Crime statistics are recorded by area (postcode or LGA), not by individual suburb. Data sourced from each state's crime statistics agency.
What is the climate like in Dee Why?
In Dee Why, mean daily temperatures range from 13.8°C to 21.8°C and annual rainfall is 1,211 mm measured at the Sydney (Observatory Hill) weather station (13.9 km away). Long-term averages from the Bureau of Meteorology.
Sources & methodology
Demographics from ABS Census. Property data from SQM Research. Climate from Bureau of Meteorology. Schools from ACARA. NBN from NBN Co. Amenities from OpenStreetMap. See full methodology.
Additional sources for this profile: