Sun Path: Geelong, Australia

Direct answer

For Geelong at -38.1471, 144.3607, the declination-only solar-noon altitude is approximately 28.4° at the June solstice, 51.9° at an equinox and 75.3° at the December solstice. Refine these geometry checks with the project date, civil time, facade azimuth, terrain and local horizon. The reproducible location record is GeoNames ID 2165798 in administrative area 07, at -38.1471, 144.3607; replace it with the surveyed parcel point before relying on the result. As a transparent geometry check, declination-only solar-noon altitude is about 28.4° at the June solstice, 51.9° at an equinox and 75.3° at the December solstice. Representative 21st-day geometry ranges from about 9.3 hours in June to 14.7 hours in December; this excludes atmospheric refraction, terrain and obstruction effects. The cited national authority is a discovery starting point; current local documents and a named qualified reviewer control project use of this sun path record.

Content and cited inputs reviewed by Harth team · Published 2026-08-26 · Updated 2026-08-31.

What must be verified for Geelong?

Geelong is represented here at approximately -38.1471, 144.3607 for discovery and workflow planning. A project address, parcel, elevation, exposure, authority, and submission date must replace that city-centre reference before design use.

How should sun path be established?

1. Fix the surveyed site and local time basis.
2. Select an authoritative weather source or a named solar-position algorithm.
3. Record period, percentile or scenario and units.
4. Test sensitivity to elevation, exposure, urban form and horizon.
5. Save the source file, retrieval date and checker in the model record.

What are the limits of this worksheet?

This sun-path-workflow page is a project-starting worksheet, not a design value or approval. The controlling authority and qualified professionals for the Geelong site remain authoritative.

Geelong monthly solar geometry check for sun path

Month-by-month geometry interpretation

• 21 January: approximate solar-noon altitude 72.0° (zenith angle 18.0°) and 14.2 hours of geometric daylight. That is 0.4 hours shorter than the preceding representative date in this annual sequence.
• 21 February: approximate solar-noon altitude 63.1° (zenith angle 26.9°) and 13.2 hours of geometric daylight. That is 1.0 hours shorter than the preceding representative date in this annual sequence.
• 21 March: approximate solar-noon altitude 52.3° (zenith angle 37.7°) and 12.0 hours of geometric daylight. That is 1.2 hours shorter than the preceding representative date in this annual sequence.
• 21 April: approximate solar-noon altitude 40.3° (zenith angle 49.7°) and 10.8 hours of geometric daylight. That is 1.3 hours shorter than the preceding representative date in this annual sequence.
• 21 May: approximate solar-noon altitude 31.7° (zenith angle 58.3°) and 9.8 hours of geometric daylight. That is 1.0 hours shorter than the preceding representative date in this annual sequence.
• 21 June: approximate solar-noon altitude 28.4° (zenith angle 61.6°) and 9.3 hours of geometric daylight. That is 0.4 hours shorter than the preceding representative date in this annual sequence.
• 21 July: approximate solar-noon altitude 31.4° (zenith angle 58.6°) and 9.7 hours of geometric daylight. That is 0.4 hours longer than the preceding representative date in this annual sequence.
• 21 August: approximate solar-noon altitude 40.1° (zenith angle 49.9°) and 10.7 hours of geometric daylight. That is 1.0 hours longer than the preceding representative date in this annual sequence.
• 21 September: approximate solar-noon altitude 52.1° (zenith angle 37.9°) and 12.0 hours of geometric daylight. That is 1.3 hours longer than the preceding representative date in this annual sequence.
• 21 October: approximate solar-noon altitude 63.6° (zenith angle 26.4°) and 13.3 hours of geometric daylight. That is 1.2 hours longer than the preceding representative date in this annual sequence.
• 21 November: approximate solar-noon altitude 72.3° (zenith angle 17.7°) and 14.3 hours of geometric daylight. That is 1.0 hours longer than the preceding representative date in this annual sequence.
• 21 December: approximate solar-noon altitude 75.3° (zenith angle 14.7°) and 14.7 hours of geometric daylight. That is 0.4 hours longer than the preceding representative date in this annual sequence.

Harth calculation for latitude -38.1471°: Cooper declination approximation, 90° - |latitude - declination| at solar noon, and centre-to-centre sunrise hour angle. See NOAA's solar calculation details for fuller method context. This screening table excludes equation-of-time/civil-time conversion, atmospheric refraction, terrain, facade azimuth and obstructions; it is not an hourly shading result.

Where can you explore related guidance?

• Explore all solar data guidance
• Sun Path: Melbourne, Australia
• Sun Path: Ballarat, Australia
• Sun Path: Bendigo, Australia
• All solar & daylight data guidance for Australia
• Climate Design Data: Geelong, Australia
• House Construction Cost Planning: Geelong, Australia
• Office Construction Cost Planning: Geelong, Australia
• Retail Construction Cost Planning: Geelong, Australia

Sources and method

Location data from the GeoNames AU dump (CC BY 4.0, snapshot 2026-08-31, GeoNames ID 2165798). Regulatory starting point: Australian Building Codes Board and the applicable state or territory authority. Figures are illustrative — verify against the current locally adopted edition for the site. Solar-method context: NOAA Solar Calculation Details; the Harth monthly table uses a simpler declination and geometric-daylight approximation whose stated limitations must be retained.

Source links

• download.geonames.org

• ncc.abcb.gov.au

• gml.noaa.gov