Mosman in Winter
In winter (June, July and August), Mosman sees average daytime highs around 17°C and overnight lows near 11°C, with 206 mm of rain over about 25 wet days across the season. It is the coldest season of the year and the 3rd-wettest season.
Across winter, daytime highs hold fairly steady around 17°C. The sky is clear or mostly clear about 56% of the time across winter, and the air most often feels dry.
Winter is Mosman's weakest season of the year to visit on our travel score. For the whole year in context, see Mosman's year-round climate.
- Avg daytime high
- 17°C
- coldest season of the year
- Avg overnight low
- 11°C
- Rainfall
- 206 mm
- 25 wet days
- Avg wind
- 18 km/h
- Travel score
- 5.9
- weakest season of the year
- Months
- Jun · Jul · Aug
Temperature in Mosman in Winter
Across winter, daytime highs hold fairly steady around 17°C.
A typical winter day in Mosman reaches about 17°C and drops to 11°C overnight. The warmest of the three months is August, the coolest July.
Mosman weather by month
How the three winter months (June, July and August) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 24° / 20° | 72 | 9.3 | 14 | 7.2 |
| Feb | 24° / 20° | 93 | 10.3 | 13.3 | 6.9 |
| Mar | 23° / 19° | 82 | 11.6 | 12.3 | 6.8 |
| Apr | 21° / 17° | 77 | 10.5 | 11.2 | 6.7 |
| May | 19° / 14° | 79 | 9.7 | 10.3 | 6.4 |
| Jun | 17° / 12° | 97 | 10.3 | 9.8 | 5.6 |
| Jul | 16° / 11° | 56 | 7.7 | 10 | 5.8 |
| Aug | 17° / 11° | 53 | 6.6 | 10.7 | 6.4 |
| Sep | 19° / 13° | 50 | 6.7 | 11.8 | 6.9 |
| Oct | 20° / 15° | 59 | 8 | 12.9 | 6.8 |
| Nov | 21° / 17° | 72 | 9.1 | 13.8 | 6.8 |
| Dec | 23° / 19° | 60 | 8.6 | 14.2 | 7.2 |
Cloud cover in Winter
The sky is clear or mostly clear about 56% of the time across winter.
Chance of precipitation in Winter
Mosman gets around 206 mm of rain over 25 wet days across winter. The line is the day-by-day chance of measurable precipitation.
Humidity in Winter
Most of winter feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Winter
Winds average 18 km/h across winter.
Sunrise & sunset in Winter
Daylight runs from about 9 h 54 min in early June to 11 h 12 min by late August. The lit band spans sunrise to sunset each day.
Solar energy in Winter
Average shortwave solar energy reaching the ground each day across winter, about 3.0 kWh/m².
Hazard calendar for Mosman
None of Mosman's seasonal hazards peak in winter. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do.
Mosman sits in the South Indian Ocean cyclone belt; the season peaks January–March.
Is winter a good time to visit Mosman?
Our two travel scores rate winter for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
winter is a reasonable time to visit Mosman for sightseeing.
What to pack for Mosman in Winter
From winter's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In winter, Mosman sees daytime highs around 17°C and nights near 11°C. Worth packing: a warm layer and rain gear. About 25 days see rain.
Sea temperature near Mosman in Winter
The nearest coast averages about 19°C across winter — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 13 km away) is warmest in February at about 23°C and coldest in August near 18°C.
It's comfortable for a long swim from Nov 13 to Jun 7 — about 6.8 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 23 | 23 | 23 | 22 | 21 | 20 | 19 | 18 | 18 | 19 | 20 | 21 |
| Comfort | Refreshing | Refreshing | Refreshing | Refreshing | Refreshing | Cool | Cool | Cool | Cool | Cool | Refreshing | Refreshing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 23 | Refreshing |
| Feb | 23 | Refreshing |
| Mar | 23 | Refreshing |
| Apr | 22 | Refreshing |
| May | 21 | Refreshing |
| Jun | 20 | Cool |
| Jul | 19 | Cool |
| Aug | 18 | Cool |
| Sep | 18 | Cool |
| Oct | 19 | Cool |
| Nov | 20 | Refreshing |
| Dec | 21 | Refreshing |
UV index in Mosman in Winter
Clear-sky midday UV across winter averages around 3 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Mosman peaks around January 15 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 18 at about 2 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 12 | 12 | 9 | 6 | 4 | 2 | 3 | 4 | 5 | 8 | 10 | 12 |
| Level | Extreme | Extreme | Very high | High | Moderate | Moderate | Moderate | Moderate | High | Very high | Very high | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 12 | Extreme |
| Feb | 12 | Extreme |
| Mar | 9 | Very high |
| Apr | 6 | High |
| May | 4 | Moderate |
| Jun | 2 | Moderate |
| Jul | 3 | Moderate |
| Aug | 4 | Moderate |
| Sep | 5 | High |
| Oct | 8 | Very high |
| Nov | 10 | Very high |
| Dec | 12 | Extreme |
Where is Mosman?
Mosman sits at 33.8°S, 151.2°E, 24 m above sea level, in Australia. The nearest listed city is Sydney Central Business District, 4.0 km away.
Topography around Mosman
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Mosman.
Within 3 km, the terrain around Mosman has only modest variations in elevation — a maximum elevation change of 104 m around an average of 26 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 232 m; within 80 km, large variations in elevation — a maximum elevation change of 961 m.
The land around Mosman is covered by water (50%), artificial surfaces (27%) and trees (20%) within 3 km, water (42%), trees (27%) and artificial surfaces (26%) within 16 km, and trees (49%) and water (35%) within 80 km.
Australia travel facts
- Travel advisory
- Level 1
- Exercise Normal Precautions
- Power plugs
- Type I
- 230 V · 50 Hz
- Prices
- ≈ 90% of US
- price level, 2025
- GDP per capita
- $65,130
- 2025
- Happiness
- 6.9 / 10
- World Happiness, 2025
- Homicide rate
- 0.9
- per 100k, 2023
- Road deaths
- 4.9
- per 100k/yr, 2019
- Income group
- High
- World Bank
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Mosman (-33.839°, 151.2396°, elevation 24 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.