Perth Weather in August

🇦🇺 Australia

17°C

High

10°C

Low

Rain Days

Sunshine

70%

Humidity

Oceania › 🇦🇺 Australia › Perth

Updated: March 2026

Is August a Good Time to Visit Perth?

6/10

Good

August is a good time to visit Perth (6/10). With 9 daily sunshine hours and only 11 rain days, this month delivers genuinely reliable outdoor conditions, ranking it 10th sunniest of the year in Perth. Culture-focused travellers and those who prefer lighter crowds will find August a practical choice, with prices running lower than peak January without sacrificing all the good weather. July offers a similar profile at lower hotel rates if dates are flexible. The main practical note: Perth's popular sites are busiest between 10am and 3pm regardless of season. Arriving at opening time or after 4pm makes a significant difference to the experience. Planning tips: accommodation is generally available without long lead times, and flight prices are typically lower than peak season. Flexible travellers will find the best deals by booking 2-4 weeks ahead. Mid-week arrivals consistently unlock lower hotel rates than weekend check-ins.

vs July:17°C avg high

The single most important thing to know about visiting Perth in August: conditions are genuinely cooperative, with 17°C highs and only 11 wet days making this one of the more straightforward months to plan around. Precipitation totals 90mm for the month, spread across roughly 11 days, and 9 sunshine hours per day give you a reliable window for outdoor plans.

17°C

Avg High

10°C

Avg Low

11 days

Rain Days

Sunshine

70%

Humidity

Temperature in Perth in August

The 7°C day-night temperature range is typical for continental climates: a light jacket in the morning that you shed by midday and need again after sunset. Humidity averages 70%, which is comfortable for most visitors. On warmer days, lighter fabrics help with the mild stickiness in the afternoon. The UV index of 2 is low, meaning sun exposure is minimal concern and sunscreen is largely optional. Wind averages 25 km/h, light enough to be refreshing on warm days but noticeable in open coastal areas or elevated viewpoints. In Fahrenheit: 63°F average high, 50°F overnight low. Data sourced from Open-Meteo ERA5 climate reanalysis (1991–2020 normals).

Temperature in August

Monthly Precipitation (mm)

What to Wear in Perth in August

Morning10°CBefore the day warms up

Afternoon17°CPeak daytime temperature

Evening13°CAfter sunset cools down

Packing for Perth in August means dressing for 17°C days and 10°C evenings. A mid-weight jacket over a sweater handles 17°C daytime temperatures; the combination stays comfortable all day without overheating. Evening temperatures settle at 10°C, a modest 7°C drop that a light cardigan or denim jacket covers. Comfortable walking trainers are the versatile choice for both outdoor sightseeing and indoor venues. A compact foldable umbrella weighs almost nothing and earns its keep across 11 potential rainy days.

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Local tip: Layers are more practical than a single heavy garment in Perth. The day-to-evening temperature shift rewards packing a versatile mid-layer you can add or remove as conditions change.

Events in Perth in August

August has no major festivals or public holidays in Perth, which is one of its practical advantages for independent travellers. Attractions run at lower capacity than during peak event periods, queues are shorter, and accommodation is easier to find without needing to book many months in advance. Local restaurants, markets, and transport operate at a relaxed pace, making this an ideal time for visitors who prefer a more authentic, unhurried experience of everyday city life rather than large crowds drawn in by a single major headline event.

What to Pack for Perth in August

Based on 17°C average highs and 11 rainy days

Light jacket or cardigan for cooler evenings
Mix of short and long-sleeve layers
Comfortable walking shoes with good arch support
Compact folding umbrella
Waterproof outer layer or packable rain jacket
Quick-dry clothing that recovers fast after a shower
Universal travel adapter
Small day pack for city exploration
Reusable water bottle

Best Activities in Perth in August

Explore the old town's cobblestone backstreetsMorning (9-11am)At 17°C, conditions are pleasant for unhurried exploration on foot
Visit hilltop viewpoints for panoramic city viewsLate afternoon (4-6pm)Low sun angle creates dramatic light for photography while temperatures remain comfortable
Bicycle rental for a half-day city circuitMid-morning startMild 17°C temperatures are ideal for extended cycling without excessive effort
Boat tour of the river, bay, or canal networkLate morning departureComfortable weather makes open-deck boats viable without wind-chill concerns
Afternoon in a world-class museum or galleryAfternoon (2-5pm)Pairs well with outdoor morning activities and provides a mid-day rest from sightseeing
Coffee-house or traditional cafe culture experienceMid-morning or post-lunchA cultural ritual in this region that rewards slow appreciation regardless of weather
Evening live music, theatre, or opera performanceEvening shows typically at 7-9pmConsistent evening temperatures make getting to and from evening venues comfortable
Visit the main botanical garden or city park at seasonal peakYear-round; best light in morningAugust brings distinct seasonal changes to public green spaces worth exploring
Try the seasonal farmer's market for local produce and street foodSaturday morning markets typically 8am-1pmAugust seasonal produce is at peak availability, offering dishes not found at other times of year

Why is Perth mild in August?

August in Perth reflects a mid-latitude climate pattern, with temperatures averaging 17°C by day and 10°C overnight. The city sits at 32 degrees south latitude, where the balance between solar radiation and heat loss drives conditions that are neither extreme nor static. Conditions occupy the comfortable middle band of the annual temperature range, where outdoor activity is feasible without the extremes of midsummer heat or midwinter cold. Day-to-night temperature variation of 7°C is moderate and manageable with a single mid-layer. Climate data: Open-Meteo ERA5 (1991–2020).

Sunshine Hours

The average number of hours per day with direct sunlight. Calculated from satellite measurements. Days with more than 7 hours of sunshine are ideal for outdoor activities. Under 3 hours means overcast conditions dominate.

UV Index

A scale from 0-11+ measuring ultraviolet radiation intensity. UV 0-2: Minimal risk. UV 3-5: Moderate -- wear sunscreen. UV 6-7: High -- hat and SPF 30+ essential. UV 8-10: Very High -- limit midday exposure. UV 11+: Extreme -- seek shade between 10am-4pm.

Rain Days

A rain day is counted when precipitation exceeds 0.1mm. This threshold captures even light drizzle. Unlike total rainfall in mm, rain days tells you how often you might need an umbrella, which is useful for planning outdoor activities.

Humidity

Relative humidity as a percentage. Below 40%: Dry -- skin and throat may feel parched. 40-60%: Comfortable -- ideal for most people. 60-80%: Sticky -- light, breathable fabrics recommended. Above 80%: Muggy -- heat feels more intense; quick-dry clothing is essential.

Frequently Asked Questions: Perth in August

In August, Perth experiences average highs of 17°C (63°F) and lows of 10°C (50°F). Expect around 11 rainy days and 9 hours of sunshine per day, with humidity averaging 70%. The 7°C gap between daytime and overnight temperatures is worth planning around: light layers work for most visitors during the day, but an extra jacket is essential for evenings. UV exposure is moderate at index 2.

Perth typically sees 11 rainy days in August, with total precipitation of around 90mm. Rain is moderate and manageable. Showers tend to pass quickly, and a light rain layer or foldable umbrella is sufficient protection for most days. For context, the driest month in Perth typically sees 4-6 fewer rain days than August.

Pack a warm jacket, sweaters, and layering pieces for Perth in August. Temperatures can drop to 10°C at night, so thermal underlayers are advisable for evening outings. Waterproof footwear is important with 11 rainy days expected. A scarf, hat, and gloves handle the windchill on clear cold days, which often feel colder than the thermometer reads.

Yes, August is an excellent time to visit Perth. With 9 daily sunshine hours and only 11 rainy days, conditions are ideal for sightseeing and outdoor activities. Temperatures averaging 17°C during the day are comfortable for long walks and outdoor dining. This is peak travel season, so booking accommodation in advance and arriving at popular attractions early in the morning helps avoid the busiest periods.

The average high temperature in Perth in August is 17°C (63°F), and the average low is 10°C (50°F). The mean daily temperature is approximately 14°C (56°F). The day-to-night range of 7°C is moderate, meaning a single light jacket covers most situations. These are 30-year climate normals based on the 1991 to 2020 reference period; individual years will vary, particularly in transitional months like spring and autumn.

The best month to visit Perth is generally January. January offers the most sunshine at 13 hours per day and only 2 rainy days. Average temperatures reach 31°C, making it comfortable for sightseeing, outdoor dining, and exploring the city. If your travel dates are flexible, planning your trip around January gives you the best chance of dry, bright weather.

August is shoulder or low season in Perth, meaning fewer tourists and generally lower prices than peak months. With 9 sunshine hours and 11 rainy days, the weather is less of a draw for mass tourism. This is an advantage for travellers who prefer a quieter, more relaxed experience with shorter queues and easier accommodation availability.

In August, Perth suits a range of activities thanks to cool conditions around 17°C. Mix of indoor and outdoor activities works well given the moderate chance of rain. Top options include exploring historic neighbourhoods, visiting museums and galleries, local food markets, and day trips to surrounding areas. With 9 hours of sunshine, parks and waterfront walks are particularly enjoyable.

August ranks 10th sunniest of the year in Perth, with an average 9 daily sunshine hours. The driest months are January, February, and March. January is the hottest month (31°C avg high); July is the coolest (17°C). From here, temperatures rise 2°C into September. Compared to last month (July: 17°C high, 13 rain days), August is similarly warm and drier. August is one of the least sunny months, but that often means lower prices and fewer fellow tourists.

Year-Round Climate

Month	High	Low	Rain Days	Sun	Details
January	31°C	19°C	2	13h	View
February	31°C	19°C	2	12h	View
March	29°C	18°C	2	11h	View
April	25°C	15°C	4	10h	View
May	21°C	12°C	9	9h	View
June	18°C	10°C	11	8h	View
July	17°C	9°C	13	8h	View
August	17°C	10°C	11	9h	View
September	19°C	11°C	9	10h	View
October	22°C	13°C	5	11h	View
November	26°C	15°C	4	12h	View
December	29°C	17°C	2	13h	View

Other Months in Perth

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Plan Your Trip to Perth

Best Time to Visit Perth

Data Sources for Perth

Perth on Wikipedia Open-Meteo Climate API NOAA National Centers UK Met Office WMO GeoNames

Climate normals represent 30-year averages (1991-2020). Individual years may vary.