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.
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
NBN coverage data refreshes monthly from NBN Co.
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
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: