Your June weather guide
MildWeather in Sydney in June
June suits a Sydney city break if you prefer mild weather to heat, but it is not a good choice for a warm-weather holiday from the UK. Average daytime highs are 16.5°C, nights fall to 10.2°C and the sea is a bracing 19.1°C. Plan for walking in layers rather than spending the day in swimwear. Rain and limited daylight are the catches, so go with flexible plans and realistic expectations about outdoor time.
Long-term climate averages for Sydney, not a forecast · 1991-2020
Sydney, month by month
Your snapshot
At a glance
The useful details for Sydney.
- Average daytime high
- 16.5°C
- 9 in 10 days stay below 19°C
- Average night-time low
- 10.2°C
- coldest 10% of nights: 7°C or lower
- Compared with London
- -3.1°C
- London averages 19.6°C in June
- Sea temperature
- 19.1°C
- year to year: 18°C to 20°C
- Sunshine per day (est.)
- 5.4h
- 55% of 9.8 h of daylight
- Rainy days (1 mm+)
- 8
- 65 mm over the month
- Humidity
- 74%
- Days over 25°C
- 0%
- none over 30°C
- Record high 1991-2020
- 22.4°C
- 2004-06-14
- Record low 1991-2020
- 3.9°C
- 2010-06-30
- Flight from London
- ≈ 22 h
- 17017 km, long-haul (estimate for a direct flight)
Records are observed extremes within 1991-2020, not typical holiday conditions. Warm-day percentages are shares of days, not day counts.
How June compares
June is the 11th warmest month of the year in Sydney and ranks 134th of 134 destinations we compare for June - see where else is hot in June. Against London's average high of 19.6°C in June, Sydney is 3.1°C cooler by day and 1.1°C cooler at night.
Daytime and night-time in June
The typical June day in Sydney peaks at 16.5°C, but that is an average: the warmest 10% of days reach 18.9°C or more. Days over 25°C are rare. Nights average 10.2°C; one night in ten drops to 7.3°C or lower, so pack a layer for evenings - it is genuinely cool after dark. Between 1991 and 2020 the hottest June day here reached 22.4°C (2004-06-14) and the coldest night 3.9°C (2010-06-30).
Rain in June
Wet (more than 8 rainy days): about 8 days with 1 mm or more, 65 mm in total. Year to year it varies a lot - the wettest June was 2007 with 293 mm, the driest 2001 with 5 mm. Humidity averages 74%.
Sea temperature in June
The sea averages 19.1°C - bracing (18-22°c). Depending on the year it ranges from 17.7°C to 20.1°C. For the warmest sea here, come in February (23.0°C).
Sunshine and daylight
Around 5.4 hours of sunshine a day (estimated from cloud cover), 9.8 hours of daylight: the sun rises about 06:58 and sets about 16:53 local time in mid-June. Average cloud cover is 45%.
Is June a good time to visit Sydney?
June is not the strongest month here: mild days and frequent rain. The best months for Sydney on our scoring are December, January, February; months averaging 25°C or more: Jan, Feb.
Comfortable for walking, cool after dark
Sydney in June is better suited to being active outdoors than sitting around in light summer clothes. The average high of 16.5°C makes a jumper or light jacket useful, with something warmer for evenings. The warmest days reach 18.9°C or more, but do not build your plans around heat: days reaching 25°C account for 0% of June days. At the other end, the coldest nights fall to 7.3°C or below, so pack trousers, closed shoes and a warm layer if you expect to stay out late. It suits travellers who dislike hot midday conditions, provided they are happy to carry layers as temperatures change.
Keep outdoor plans flexible
Rain is a meaningful part of the June trade-off, with about 8 rainy days, so bring a waterproof jacket and leave room to rearrange outdoor plans. That does not mean every day is a washout: there are about 5.4 hours of sunshine within 9.8 hours of daylight. Give daytime outings priority rather than relying on long, light evenings. The sea averages 19.1°C, which is bracing rather than comfortably warm; swimming is more appealing if you already enjoy cooler water. For a trip built around relaxed outdoor time, allow indoor alternatives. For a holiday centred on warm swims and sunshine, June is a poor fit.
A little perspective
Sydney through the year
June is highlighted. See how it compares with the rest of the year.
| Month | Day | Night | Sea | Sun/day | Rain mm | Rainy days | Days 25°C+ |
|---|---|---|---|---|---|---|---|
| Januarybest | 25.7°C | 19.5°C | 22.5°C | 6.3 | 68 | 9 | 53% |
| Februarybest | 25.1°C | 19.5°C | 23.0°C | 5.7 | 87 | 11 | 47% |
| March | 23.8°C | 18.1°C | 22.7°C | 5.9 | 70 | 11 | 29% |
| April | 21.6°C | 15.2°C | 21.9°C | 6.0 | 54 | 8 | 10% |
| May | 18.9°C | 12.2°C | 20.6°C | 5.8 | 46 | 7 | 1% |
| JuneSelected | 16.5°C | 10.2°C | 19.1°C | 5.4 | 65 | 8 | 0% |
| July | 16.0°C | 8.9°C | 18.0°C | 6.4 | 36 | 6 | 0% |
| August | 17.2°C | 9.2°C | 17.5°C | 7.3 | 37 | 5 | 1% |
| September | 19.6°C | 11.4°C | 17.7°C | 7.4 | 40 | 6 | 7% |
| October | 21.5°C | 13.7°C | 18.6°C | 6.7 | 51 | 8 | 18% |
| November | 22.7°C | 15.7°C | 19.6°C | 6.0 | 70 | 9 | 24% |
| Decemberbest | 24.4°C | 17.7°C | 21.0°C | 6.3 | 56 | 9 | 39% |
Day = average daytime high, night = average night-time low, 1991-2020.Sun is hours per day; rainy days count 1 mm or more.
Day, night and sea
Monthly average temperatures, 1991-2020
- Day
- Night
- Sea
Best months here
On warmth, low rainfall and sunshine, start with these.
Keep exploring
Similar in June
Closest matches on daytime temperature, sea temperature and sunshine, in other countries.
A little more detail
Sydney in June FAQs
Plain answers, grounded in the averages.
Is Sydney hot in June?
Sydney is mild in June: the average daytime high is 16.5°C and nights average 10.2°C. Days over 25°C are rare in June.
Can you swim in the sea in Sydney in June?
The sea around Sydney averages 19.1°C in June, which is bracing - fine for a quick dip, cool for long swims. Between 1991 and 2020 it ranged from 18°C to 20°C depending on the year.
How much does it rain in Sydney in June?
Sydney sees about 8 rainy days (1 mm or more) and 65 mm of rain in a typical June. The wettest June between 1991 and 2020 was 2007 (293 mm) and the driest was 2001 (5 mm).
How sunny is Sydney in June?
Sydney gets around 5.4 hours of sunshine a day in June out of 9.8 hours of daylight (estimated from average cloud cover).
How does Sydney compare with the UK in June?
Sydney is on average 3.1°C cooler than London by day in June (16.5°C against 19.6°C).
What is the hottest June on record in Sydney?
Between 1991 and 2020 the hottest June day in Sydney reached 22.4°C on 2004-06-14, and the coldest night dropped to 3.9°C on 2010-06-30.
Is Sydney warmer than London in June?
No. Sydney's average daytime high is 16.5°C, compared with London's 19.6°C, making it 3.1°C cooler. If your main reason for travelling is warmer daytime weather than at home, June does not offer that advantage.
Is June worth the long flight from the UK?
The flight from London takes about 22 hours, so the weather needs to match your priorities. June can suit a city-focused trip in mild conditions, but it is hard to justify on warmth or swimming weather alone.
When should I go instead for warmer weather?
December, January and February are the better choices for a warmer-weather trip. June is among Sydney's coolest months, so choose it for mild conditions rather than expecting a summer-style holiday with warm evenings and comfortable sea swimming.
About these averages
ERA5-Land climate reanalysis via Open-Meteo (11 km grid) and NOAA Coral Reef Watch 5 km sea temperatures, 1991-2020
Averages computed from daily values at Sydney. Sea temperature from the nearest 5 km sea cell, 1.8 km from that point. Sunshine hours are estimated from average cloud cover.Records are the highest and lowest daily values in that 30-year period, not all-time records. These are climate averages, not a forecast for your trip. How we measure holiday weather
- Hot · 25°C+
- Warm · 20°C to below 25°C
- Mild · 15°C to below 20°C
- Cool · below 15°C