Best time to visit Sydney Harbour National Park
The best time to visit Sydney Harbour National Park is April–May and August–January, judged on twenty years of weather records and the events worth going for.
Sydney Harbour National Park, New South Wales, Australia
°C
mm
- Average daily high and low
- Precipitation
- Good month
- Best month
- Made good or best by an event
| Month | Average daily high | Average daily low | Precipitation | Verdict |
|---|---|---|---|---|
| January | 24.5 °C / 76 °F | 20.6 °C / 69 °F | 77 mm / 3 in | best month |
| February | 24.3 °C / 76 °F | 20.6 °C / 69 °F | 103 mm / 4.1 in | good month |
| March | 23.6 °C / 74 °F | 19.7 °C / 67 °F | 117 mm / 4.6 in | good month |
| April | 21.5 °C / 71 °F | 16.9 °C / 62 °F | 91 mm / 3.6 in | best month |
| May | 19.1 °C / 66 °F | 14 °C / 57 °F | 73 mm / 2.9 in | best month |
| June | 16.7 °C / 62 °F | 12.1 °C / 54 °F | 109 mm / 4.3 in | good month |
| July | 16.5 °C / 62 °F | 11.1 °C / 52 °F | 72 mm / 2.8 in | good month |
| August | 17.3 °C / 63 °F | 11.5 °C / 53 °F | 62 mm / 2.5 in | best month |
| September | 19.2 °C / 67 °F | 13.4 °C / 56 °F | 55 mm / 2.2 in | best month |
| October | 20.7 °C / 69 °F | 15.4 °C / 60 °F | 64 mm / 2.5 in | best month |
| November | 21.8 °C / 71 °F | 17.3 °C / 63 °F | 76 mm / 3 in | best month |
| December | 23.1 °C / 74 °F | 18.9 °C / 66 °F | 65 mm / 2.5 in | best month |
Good and best months depend on more than temperature, rain and events. How they are chosen
Each activity on this page has its own good and best months, rated on twenty years of daily weather records. Which measures count, and how much, depends on the activity: humidity for exploring outdoors, wind for the beach, hiking and skiing, snow for skiing alone. Between them, the activities are rated on:
- Daytime highs
- Night-time lows
- How warm it feels
- Humidity
- How much of the day is sunny
- Hours of daylight
- Monthly rainfall
- How many days it rains
- Days of heavy rain
- Wind
- Snowfall and days with snow
- Major events, such as festivals
The chart shows the good and best months for exploring outdoors.
The event icon marks a month that an event lifts to good or best, such as a festival or a natural spectacle. Choose “Weather only” in the toolbar to rate the months on weather alone.
Best months by activity
Exploring outdoors
Mild days and nights, mostly dry and bright. The default for 'when should I go'.
- JJanuary: best
- FFebruary: good
- MMarch: good
- AApril: best
- MMay: best
- JJune: good
- JJuly: good
- AAugust: best
- SSeptember: best
- OOctober: best
- NNovember: best
- DDecember: best
- Best
- April–May, August–January
- Good
- February–March, June–July
Why these months
January · best
In its favour: feels like (high) 26.4 °C / 80 °F, average daily high 24.5 °C / 76 °F, share of daylight that is sunny 81%, precipitation 77 mm / 3 in, days with heavy rain 2.1 days, wet days 10.8 days, average daily low 20.6 °C / 69 °F.
Against: relative humidity 77%.
February · good
In its favour: feels like (high) 25.9 °C / 79 °F, average daily high 24.3 °C / 76 °F, share of daylight that is sunny 80%, precipitation 103 mm / 4.1 in, days with heavy rain 3 days, wet days 12 days, average daily low 20.6 °C / 69 °F.
Against: relative humidity 77%.
March · good
In its favour: feels like (high) 24.6 °C / 76 °F, average daily high 23.6 °C / 74 °F, share of daylight that is sunny 82%, precipitation 117 mm / 4.6 in, days with heavy rain 3.4 days, average daily low 19.7 °C / 67 °F, relative humidity 76%.
Against: wet days 13.6 days.
April · best
In its favour: feels like (high) 21.1 °C / 70 °F, average daily high 21.5 °C / 71 °F, share of daylight that is sunny 85%, precipitation 91 mm / 3.6 in, days with heavy rain 1.9 days, average daily low 16.9 °C / 62 °F, wet days 12.1 days, relative humidity 73%.
May · best
In its favour: feels like (high) 17.4 °C / 63 °F, average daily high 19.1 °C / 66 °F, share of daylight that is sunny 87%, precipitation 73 mm / 2.9 in, days with heavy rain 2.3 days, wet days 9.8 days, average daily low 14 °C / 57 °F, relative humidity 71%.
June · good
In its favour: share of daylight that is sunny 84%, feels like (high) 14.2 °C / 58 °F, average daily high 16.7 °C / 62 °F, precipitation 109 mm / 4.3 in, days with heavy rain 3.3 days, average daily low 12.1 °C / 54 °F, wet days 11.3 days, relative humidity 72%.
July · good
In its favour: share of daylight that is sunny 90%, precipitation 72 mm / 2.8 in, feels like (high) 13.5 °C / 56 °F, average daily high 16.5 °C / 62 °F, days with heavy rain 1.6 days, wet days 8.6 days, average daily low 11.1 °C / 52 °F, relative humidity 69%.
August · best
In its favour: feels like (high) 14.7 °C / 58 °F, share of daylight that is sunny 87%, precipitation 62 mm / 2.5 in, average daily high 17.3 °C / 63 °F, days with heavy rain 1.8 days, wet days 7.9 days, average daily low 11.5 °C / 53 °F, relative humidity 67%.
September · best
In its favour: feels like (high) 17.6 °C / 64 °F, average daily high 19.2 °C / 67 °F, precipitation 55 mm / 2.2 in, share of daylight that is sunny 90%, days with heavy rain 1.4 days, wet days 7.5 days, average daily low 13.4 °C / 56 °F, relative humidity 67%.
October · best
In its favour: feels like (high) 20.3 °C / 69 °F, average daily high 20.7 °C / 69 °F, share of daylight that is sunny 85%, precipitation 64 mm / 2.5 in, days with heavy rain 1.8 days, wet days 9.3 days, average daily low 15.4 °C / 60 °F, relative humidity 70%.
November · best
In its favour: feels like (high) 22.3 °C / 72 °F, average daily high 21.8 °C / 71 °F, share of daylight that is sunny 80%, precipitation 76 mm / 3 in, days with heavy rain 2.3 days, wet days 9.5 days, average daily low 17.3 °C / 63 °F, relative humidity 74%.
December · best
In its favour: feels like (high) 24.3 °C / 76 °F, average daily high 23.1 °C / 74 °F, share of daylight that is sunny 82%, precipitation 65 mm / 2.5 in, days with heavy rain 1.7 days, wet days 9.4 days, average daily low 18.9 °C / 66 °F, relative humidity 75%.
Beach and swimming
Hot, dry and sunny. Penalises the monsoon hard.
- JJanuary: good
- FFebruary: neither
- MMarch: neither
- AApril: neither
- MMay: neither
- JJune: neither
- JJuly: neither
- AAugust: neither
- SSeptember: neither
- OOctober: neither
- NNovember: neither
- DDecember: good
- Good
- December–January
Why these months
January · good
In its favour: share of daylight that is sunny 81%, average daily high 24.5 °C / 76 °F, feels like (high) 26.4 °C / 80 °F, precipitation 77 mm / 3 in, days with heavy rain 2.1 days, average daily low 20.6 °C / 69 °F, wind (daily max) 27 km/h / 17 mph.
Against: wet days 10.8 days.
December · good
In its favour: share of daylight that is sunny 82%, precipitation 65 mm / 2.5 in, days with heavy rain 1.7 days, average daily high 23.1 °C / 74 °F, feels like (high) 24.3 °C / 76 °F, average daily low 18.9 °C / 66 °F, wind (daily max) 27 km/h / 17 mph.
Against: wet days 9.4 days.
Hiking and trekking
Cool enough to climb in, dry enough to enjoy, long enough days.
- JJanuary: neither
- FFebruary: neither
- MMarch: neither
- AApril: best
- MMay: best
- JJune: good
- JJuly: best
- AAugust: best
- SSeptember: best
- OOctober: best
- NNovember: best
- DDecember: good
- Best
- April–May, July–November
- Good
- June, December
Why these months
April · best
In its favour: average daily high 21.5 °C / 71 °F, precipitation 91 mm / 3.6 in, days with heavy rain 1.9 days, feels like (high) 21.1 °C / 70 °F, share of daylight that is sunny 85%, daylight per day 11.2 h, wet days 12.1 days, wind (daily max) 23 km/h / 14 mph, average daily low 16.9 °C / 62 °F.
May · best
In its favour: average daily high 19.1 °C / 66 °F, precipitation 73 mm / 2.9 in, days with heavy rain 2.3 days, feels like (high) 17.4 °C / 63 °F, average daily low 14 °C / 57 °F, wet days 9.8 days, share of daylight that is sunny 87%, wind (daily max) 23 km/h / 14 mph, daylight per day 10.4 h.
June · good
In its favour: average daily high 16.7 °C / 62 °F, precipitation 109 mm / 4.3 in, feels like (high) 14.2 °C / 58 °F, average daily low 12.1 °C / 54 °F, share of daylight that is sunny 84%, days with heavy rain 3.3 days, wet days 11.3 days, wind (daily max) 25 km/h / 16 mph.
Against: daylight per day 9.9 h.
July · best
In its favour: average daily high 16.5 °C / 62 °F, precipitation 72 mm / 2.8 in, days with heavy rain 1.6 days, wet days 8.6 days, feels like (high) 13.5 °C / 56 °F, average daily low 11.1 °C / 52 °F, share of daylight that is sunny 90%, wind (daily max) 25 km/h / 16 mph, daylight per day 10.1 h.
August · best
In its favour: average daily high 17.3 °C / 63 °F, precipitation 62 mm / 2.5 in, wet days 7.9 days, days with heavy rain 1.8 days, feels like (high) 14.7 °C / 58 °F, average daily low 11.5 °C / 53 °F, share of daylight that is sunny 87%, daylight per day 10.9 h, wind (daily max) 25 km/h / 16 mph.
September · best
In its favour: average daily high 19.2 °C / 67 °F, precipitation 55 mm / 2.2 in, wet days 7.5 days, days with heavy rain 1.4 days, feels like (high) 17.6 °C / 64 °F, average daily low 13.4 °C / 56 °F, share of daylight that is sunny 90%, daylight per day 11.9 h, wind (daily max) 27 km/h / 17 mph.
October · best
In its favour: average daily high 20.7 °C / 69 °F, precipitation 64 mm / 2.5 in, days with heavy rain 1.8 days, wet days 9.3 days, feels like (high) 20.3 °C / 69 °F, share of daylight that is sunny 85%, daylight per day 12.9 h, average daily low 15.4 °C / 60 °F, wind (daily max) 27 km/h / 17 mph.
November · best
In its favour: average daily high 21.8 °C / 71 °F, precipitation 76 mm / 3 in, days with heavy rain 2.3 days, wet days 9.5 days, share of daylight that is sunny 80%, daylight per day 13.9 h, feels like (high) 22.3 °C / 72 °F, wind (daily max) 27 km/h / 17 mph.
Against: average daily low 17.3 °C / 63 °F.
December · good
In its favour: average daily high 23.1 °C / 74 °F, precipitation 65 mm / 2.5 in, days with heavy rain 1.7 days, wet days 9.4 days, share of daylight that is sunny 82%, daylight per day 14.4 h, feels like (high) 24.3 °C / 76 °F, wind (daily max) 27 km/h / 17 mph.
Against: average daily low 18.9 °C / 66 °F.
An activity is listed only where it applies: skiing at ski destinations, beach and swimming at beach destinations. The nearest ski area is Perisher, 382 km away.
Weather averages
Monthly averages over twenty years, 2006–2025. Highs, lows and precipitation are in the chart at the top.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Feels like (high) | 26.4 °C | 25.9 °C | 24.6 °C | 21.1 °C | 17.4 °C | 14.2 °C | 13.5 °C | 14.7 °C | 17.6 °C | 20.3 °C | 22.3 °C | 24.3 °C |
| Days with heavy rain | 2.1 days | 3 days | 3.4 days | 1.9 days | 2.3 days | 3.3 days | 1.6 days | 1.8 days | 1.4 days | 1.8 days | 2.3 days | 1.7 days |
| Time rain usually falls | 5 pm | 1 am | 11 am | 10 am | 12 am | 6 am | 7 am | 9 pm | 10 am | 12 am | 3 pm | 6 pm |
| Sunshine per day | 11.4 h | 10.7 h | 10.1 h | 9.6 h | 9 h | 8.4 h | 9.1 h | 9.4 h | 10.6 h | 11 h | 11.1 h | 11.8 h |
| Relative humidity | 77% | 77% | 76% | 73% | 71% | 72% | 69% | 67% | 67% | 70% | 74% | 75% |
Sea temperature
Averaged over a shorter period (2022–2025) than the twenty-year averages above.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature 2022–2025 | 22.3 °C | 23.3 °C | 22.8 °C | 22 °C | 21 °C | 19.5 °C | 17.9 °C | 18 °C | 18.6 °C | 19.3 °C | 20 °C | 20.8 °C |
| Sea temperature (daily max) 2022–2025 | 22.5 °C | 23.5 °C | 23 °C | 22.2 °C | 21.1 °C | 19.6 °C | 18 °C | 18.1 °C | 18.8 °C | 19.4 °C | 20.2 °C | 21.1 °C |
- Very cold 10 °C or less
- Cold 10 to 15 °C
- Cool 15 to 20 °C
- Comfortable 20 to 25 °C
- Warm 25 to 28 °C
- Very warm over 28 °C
The words describe how the water feels to swim in. They are ours, not an official standard.
Air quality
Averaged over a shorter period (2022–2025) than the twenty-year averages above, and not counted towards good or best months.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Air pollution (PM2.5) 2022–2025 | 10.6 µg/m³ | 10.9 µg/m³ | 10.9 µg/m³ | 10.9 µg/m³ | 11.4 µg/m³ | 11.6 µg/m³ | 9.1 µg/m³ | 10.1 µg/m³ | 11.1 µg/m³ | 10.4 µg/m³ | 10.2 µg/m³ | 11 µg/m³ |
| Air pollution (PM2.5, daily peak) 2022–2025 | 16.2 µg/m³ | 16.9 µg/m³ | 17.4 µg/m³ | 20 µg/m³ | 21.2 µg/m³ | 23.5 µg/m³ | 17.7 µg/m³ | 18.5 µg/m³ | 20.2 µg/m³ | 17.4 µg/m³ | 17.2 µg/m³ | 17.4 µg/m³ |
- Good 15 µg/m³ or less
- Fair 15 to 25 µg/m³
- Moderate 25 to 37.5 µg/m³
- Poor 37.5 to 50 µg/m³
- Very poor 50 to 75 µg/m³
- Extremely poor over 75 µg/m³
Each figure is compared with the World Health Organization's guideline for a day's air, 15 µg/m³ or less, and with its interim targets above that. The words are ours: the WHO does not name its steps. The figures are modelled monthly averages, so single days can be well above them. The daily peak is the average of each day's highest hour, shaded on the same scale.