Newcastle weather, and across the Hunter region, has a humid subtropical climate that is typical of the Australian East coast.
Winter, from June to August, is very mild, however, cold air can sometimes arrive from the south and lower the temperature, especially at night.
In comparison, during spring and summer there can be heatwaves, although they usually last for a short time (sometimes only a day or two). Heat records between November to February can exceed 40 °C. Precipitation is heaviest in late autumn and early winter, while the second half of the year is slightly drier on average.
The longest days in Newcastle are in December, with an average of 14.3 hours of daylight per day. June has the shortest days with an average of 10 hours of daylight per day.
The water temperature is pretty good all year round. The time of year with warmer water lasts for 3.5 months, from 1 January to 17 April, with an average temperature above 22°C. The month of the year in Newcastle with the warmest water is February, with an average temperature of 23°C.
The time of year with cooler water lasts for 3.8 months, from 25 June to 20 October, with an average temperature below 19°C. The month of the year in Newcastle with the coolest water is August, with an average temperature of 18°C.
The best time of year to visit Newcastle for warm-weather activities is from early December to late March.
See below local Newcastle weather for today and forecast for the next 7 days.