Sun and wind analysis
Setting Out · Phase 03 — Site analysis
Upload the sun and wind overlay
The base plan with true north marked, the shade outlines for 9am, noon and 3pm, the hot west-facing surfaces, and arrows for the sea breeze and the winter storm wind.
Where the overlay lives, and when you walked it
File name or folder, plus the date and the season. Shade recorded in August is not the shade you get in February.
Summer and winter sun paths, as drawn on the plan
Sunrise and sunset bearings and the noon altitude for 21 December and 21 June. Get your own from SunCalc or the Geoscience Australia calculator rather than a generic Perth figure.
The areas in shade at 9am, noon and 3pm
| Time | Areas in shade | What casts it |
|---|---|---|
The hottest surfaces on site
West and north-west facing walls, limestone retaining, colorbond, light paving, the pool fence, the shed.
Prevailing summer sea breeze direction
Draw it as an arrow on the plan. West-south-west at onset, backing to south-west at full strength — mark where it crosses your boundary.
Winter storm wind direction
North-west quarter, off the Indian Ocean. Watch two or three June fronts — note which gates slam and which corner collects the rubbish.