Best time to visit Perth

Re-score for me — drag the dial — every chart recolours live for your heat & sea limits 27°C · sea 29°C
I'm comfortable up to 27°C feels-like
22° heat-averse 30° heat-loving

Default 27 °C is the upper edge of the Holiday Climate Index "ideal comfort" band (Scott, Rutty, Amelung & Tang, 2016). Above this, most warm-tourism travellers report measurable discomfort.

Sea feels bathtub at 29°C
26° strict 31° tolerant

Default 29 °C is the Beach Climate Index "bathtub" line (Morgan et al.) — where the sea stops being refreshing and starts feeling like a warm bath.

Saved to this browser. Changes update the strips below.
Sea temp cold <18° chilly 18–21° ideal 22–26° warm 27–28° bathtub 29–30° too warm ≥31°
Recent · 2020-2024
Interest Google Trends 2021-2025 searches, not arrivals (?)
Sea Nov 2022 – Dec 2024 (?)
Day · avg daily high (?)
Night · avg overnight low (?)
Heatwaves · days/yr ≥35°C ETCCDI TX35 (?)
46214
Tropical nights · nights/yr ≥20°C ETCCDI TR20 — sleep killer (?)
101382<19
UV index · On a typical day around midday, UV is about this (?)
131296423467912
On the sunniest 1 in 10 days, UV reaches this — and even higher
13117338101113
PM2.5 air quality · on a typical day (?)
554567677765
On the worst 1 in 10 days, PM2.5 reaches this — and even higher
78799101110111087
December 10/10 beach 10/10 urban feels 27°C (+1°C vs 1991-2020) · HCI 97/100
Day 29° · Night 18° · cools 11° at night ⚠ 4.0 days/yr ≥35° · peak 6 in worst year 🌙 9 tropical nights/yr · peak 12 ☀ UV 11.7 (extreme) 42% humidity 29 km/h wind 2 rain days (20h) 312h sun sea 23°C
Thermal 9
Sky 10
Rain 10
Wind 9

Higher = better, including rain & wind (green = "doesn't hurt the score", not "lots of it").

How is this scored? HCI / Steadman / CCI gate — full methodology and citations below.

Compare with another destination

Add as many as you like — stacked below the main strips above. Each row is just the recent-window score strip and (for beach destinations) sea-temperature strip.

Tours in Perth

6 top-rated tours via Viator. Booking links earn this site a commission at no cost to you.

  1. 1Pinnacles Desert Sunset Dinner and Stargazing Tour4.78★ (1,087)9h 30mfrom $161🔥 Selling fast
  2. 2Rottnest Skydive + Hillarys Ferry package5.00★ (23)24hfrom $433🔥 Selling fast
  3. 3Rottnest Skydive + Perth Barrack St Ferry package5.00★ (12)24hfrom $462🔥 Selling fast
  4. 4Ultimate Swan Valley Food and Wine Day Trip from Perth4.84★ (691)from $123
  5. 5The Optus Stadium Tour4.91★ (567)1h 30mfrom $26
  6. 64-Day Monkey Mia Dolphins Pink Lake Pinnacles Comfort-Level Tour4.81★ (32)96hfrom $1160🔥 Selling fast

Last refreshed 2026-05-26.

Similar climatesCape Town92% · Sydney72% · Gold Coast68%

Other destinations with the most-alike year-round climate to Perth (apparent temperature, rain hours, sunshine — matched within the same trip-profile). The ±N chip compares each match's typical score for the current month against Perth's. Based on the 2020-2024 climatology, not this year's actual weather.

Month-by-month

Month Temp °C Feels °C Rain days Rain h Rain h/day Humidity Wind km/h Sun h UV Interest Score
Jan 19–30 28 0 8 — 41% 31 304 13 Quiet 9
Feb 20–31 30 2 30 15.0 41% 29 260 12 Quiet 8
Mar 18–29 28 5 56 11.2 47% 26 256 9 Quiet 10
Apr 15–25 23 6 58 9.7 49% 23 224 6 Quiet 10
May 13–22 20 10 129 12.9 57% 23 203 4 Quiet 8
Jun 11–18 16 14 160 11.4 67% 22 187 2 Quiet 6
Jul 11–18 15 17 204 12.0 67% 26 194 3 Quiet 5
Aug 10–18 15 13 162 12.5 65% 25 223 4 Quiet 6
Sep 11–20 17 8 112 14.0 61% 26 241 6 Quiet 8
Oct 12–22 19 6 88 14.7 54% 27 263 7 Quiet 9
Nov 15–25 23 6 70 11.7 51% 27 285 9 Peak 10
Dec 18–29 27 2 20 10.0 42% 29 312 12 Busy 10

UV Index in Perth by Month

UV index in Perth peaks at 13 (extreme) in January, dropping to 2 (low) in June. January, February, March, November, December reach very high or extreme levels — apply SPF 50+, wear a hat and protective clothing, and limit direct sun between 11:00 and 17:00.

Best months in detail

December

10/10

18–29°C (feels 27°C) · 2 rain days (20h) · 312 sun hours · 42% humidity · Busy crowd · UV 12 (extreme) · sunniest 1 in 10 days reach 13 (extreme)

March

10/10

18–29°C (feels 28°C) · 5 rain days (56h) · 256 sun hours · 47% humidity · Quiet crowd · UV 9 (very high) · sunniest 1 in 10 days reach 11 (extreme)

April

10/10

15–25°C (feels 23°C) · 6 rain days (58h) · 224 sun hours · 49% humidity · Quiet crowd · UV 6 (moderate) · sunniest 1 in 10 days reach 7 (high)

Every month

Show the other 9 months in detail

January

9/10

19–30°C (feels 28°C) · 0 rain days (8h) · 304 sun hours · 41% humidity · Quiet crowd · UV 13 (extreme)

February

8/10

20–31°C (feels 30°C) · 2 rain days (30h) · 260 sun hours · 41% humidity · Quiet crowd · UV 12 (extreme) · sunniest 1 in 10 days reach 13 (extreme)

May

8/10

13–22°C (feels 20°C) · 10 rain days (129h) · 203 sun hours · 57% humidity · Quiet crowd · UV 4 (moderate)

June

6/10

11–18°C (feels 16°C) · 14 rain days (160h) · 187 sun hours · 67% humidity · Quiet crowd · UV 2 (low) · sunniest 1 in 10 days reach 3 (moderate)

July

5/10

11–18°C (feels 15°C) · 17 rain days (204h) · 194 sun hours · 67% humidity · Quiet crowd · UV 3 (low) · sunniest 1 in 10 days reach 3 (moderate)

August

6/10

10–18°C (feels 15°C) · 13 rain days (162h) · 223 sun hours · 65% humidity · Quiet crowd · UV 4 (moderate)

September

8/10

11–20°C (feels 17°C) · 8 rain days (112h) · 241 sun hours · 61% humidity · Quiet crowd · UV 6 (moderate) · sunniest 1 in 10 days reach 8 (high)

October

9/10

12–22°C (feels 19°C) · 6 rain days (88h) · 263 sun hours · 54% humidity · Quiet crowd · UV 7 (high) · sunniest 1 in 10 days reach 10 (very high)

November

10/10

15–25°C (feels 23°C) · 6 rain days (70h) · 285 sun hours · 51% humidity · Peak crowd · UV 9 (very high) · sunniest 1 in 10 days reach 11 (extreme)

Frequently asked questions about visiting Perth

When is the best time to visit Perth?

December is the highest-scoring month (10/10 on the Holiday Climate Index). Typical conditions: 18–29°C (2 rainy days). The top three months by score are December, March, April.

What is the worst time to visit Perth?

July is the lowest-scoring month (5/10). Typical conditions: 11–18°C (17 rainy days).

When are crowds lowest in Perth?

Search-interest seasonality (Google Trends 2021-2025) is lowest in March and peaks in November. Interest tracks both in-trip visitors and lead-time planners, so treat it as a "destination is on people's minds" signal rather than literal arrivals.

Which months in Perth have good weather but fewer tourists?

March (climate 10/10, crowd index 0) and April (climate 10/10, crowd index 35) — shoulder months with above-average climate and below-median search-interest. Often the best value-for-weather trade.

What is the UV index in Perth by month?

UV peaks at 13 (extreme) in January and is lowest in June at 2 (low). Monthly peak values: Jan 13, Feb 12, Mar 9, Apr 6, May 4, Jun 2, Jul 3, Aug 4, Sep 6, Oct 7, Nov 9, Dec 12. January, February, March, November, December reach very high or extreme levels — apply SPF 50+, wear a hat and protective clothing, and limit direct sun between 11:00 and 17:00.

What is the UV index in Perth in January?

January is the peak UV month in Perth, with a daily-peak UV index of 13 (extreme). At this level, sunburn can occur in under 20 minutes on unprotected fair skin. Apply SPF 50+, wear protective clothing and a hat, and avoid direct midday sun (11:00–17:00).

How high can UV get in Perth on the sunniest days?

Most days look like the monthly average, but on the sunniest ~1 in 10 days UV climbs higher than the mean suggests. February is the worst case: typical days average UV 12 (extreme), but the top 10% of days reach UV 13 (extreme) — and even higher. Months where the sunniest days routinely exceed the typical reading: February, March, April, June, July, September, October, November, December. Plan sun protection for the worst case, not the average.