Any season can work for painting a Sydney house if the job is planned around the weather, but some seasons make it a lot easier than others.
Which Season Is Best?
- Spring (September to November): the best season. Mild, dry and fewer rain days.
- Late winter (August): a good second choice. Cool, but one of the driest, clearest months of the year.
- Autumn (March to May): comfortable temperatures, but Sydney’s wettest season, so allow for rain days.
- Summer (December to February): fine with planning. Paint in the shade and watch for storms.
- Interiors: any time of year.
Sydney’s Weather by Season
Bureau of Meteorology averages show spring is Sydney’s driest and least humid season. Autumn, which many people assume is ideal, is the wettest.
| Season | Average max | Average rain per month | Morning humidity |
|---|---|---|---|
| Spring (Sep–Nov) | 22°C | 76 mm | 63% |
| Summer (Dec–Feb) | 26°C | 99 mm | 71% |
| Autumn (Mar–May) | 22°C | 125 mm | 73% |
| Winter (Jun–Aug) | 17°C | 103 mm | 70% |
Source: Bureau of Meteorology long-term averages for Sydney (Observatory Hill). Morning humidity is the 9am average.
September is the driest month on average, with around 68 mm of rain, and October has the lowest morning humidity.
How Weather Affects Drying Paint
Most exterior house paints are water-based acrylics. As the water evaporates, the paint forms a flexible film that grips the surface, and the weather decides how well that happens:
- Too cold: the paint dries slowly and may not form a proper film. Dulux’s instructions for Weathershield say the temperature must be above 5°C while it’s applied and while it dries.
- Too hot: on a wall in full sun, the paint dries before it can level out, leaving lap and brush marks.
- Too damp: the paint stays wet for longer, and rain or overnight dew can mark it or wash it off.
Painting in Each Season
Painting in Spring
From September to November, daytime temperatures sit in the low 20s, rainfall is at its lowest and humidity drops, so fewer days are lost to weather and paint dries at a steady pace. It’s the season we’d choose for most exterior repaints. Watch for windy days, which dry paint faster and can blow dust, sand or salt onto a wet finish.
Painting in Summer
Summer is fine for painting with a bit more planning. A dark wall in afternoon sun gets far hotter than the air around it, and paint on a hot surface dries before it can flow out evenly. So the painting follows the shade: walls that are shaded in the morning come first, then the work moves around the house with the sun. Humid days and afternoon storms are common later in summer, so big walls aren’t started late in the day when a storm is forecast.
Painting in Autumn
Autumn has the same comfortable temperatures as spring, with more rain. March to June are Sydney’s wettest months on average, and a damp spell can hold up an exterior job for a few days. It works well with a little slack in the schedule.
Painting in Winter
Sydney’s coastal winters are mild. Average daytime temperatures sit between 16°C and 18°C, and overnight lows average 8°C to 9°C, above the minimum for most exterior paints. August is one of the driest months, with more clear days than any other month.
Days are shorter and dew is heavier, so outside coats go on once the walls have dried in the morning, and finish early enough to dry before the evening dew. Prep and sheltered work fill the early hours, and shaded, south-facing walls are left for the warmest part of the day. Winter jobs can take a little longer, but they last just as well.
What’s Different on the Coast
Living near the water affects the daily timing more than the season. On the Northern Beaches and in the Eastern Suburbs, a few things shape every exterior job:
- Morning dew and sea mist. Coastal homes stay damp for longer in the morning, so painting starts once the surfaces have dried.
- Salt on the walls. Salt builds up on coastal homes, especially under the eaves where rain doesn’t reach. Walls get washed down before painting so the new paint can bond. There’s more on this in our guide to how often coastal homes need repainting.
- Wind. Onshore winds carry salt spray and sand, so on a blowy day the ocean-facing side of the house may have to wait.
- Strong sun. Sun reflecting off the water adds to the UV on coastal walls, which makes working in the shade even more important in summer.
Interior Painting Any Time of Year
Weather matters much less inside. Interiors can be painted in any season, which makes winter and the wetter weeks of autumn a good time to book them.
In humid weather, open windows and fans help the paint dry. In winter it dries a little slower, particularly in cold, shaded rooms. The low-VOC paints we use inside keep the smell down year-round.
Booking Your Paint Job
Spring is the busiest time of year for painters, so it helps to get in touch a few weeks before you’d like the work done. When we quote, we’ll tell you when we can start. If your timing is flexible, the quieter months can be a good time to book.
It helps to have a few things ready when you ask for a quote:
- Which parts of the house you want painted, inside or out.
- Any problem areas you’ve noticed, such as peeling, cracking or mould.
- Your preferred timing, and any dates that won’t work.
If you’re comparing quotes, our questions to ask before hiring a painter and cost guides for the Northern Beaches and Eastern Suburbs explain what to look for and what drives the price.
Planning an exterior repaint? Get a free quote and we’ll look at the job, then give you an honest view on timing as well as price. You can also read more about our exterior painting service.