Mary Bay Weather Forecast
- 19
- 25
Partly cloudy
- 16
- 26
Cloud clearing
- 16
- 29
Sunny
- 18
- 26
Cloudy
- 18
- 28
Mostly sunny
- 19
- 30
Sunny
- 19
- 28
Shower or two
Today 26 Jan Illawarra
Partly cloudy. Light winds.
Illawarra Coastal Waters
Port Hacking to Ulladulla- Wind
- South to southeasterly 10 to 15 knots.
- Seas
- Around 1 metre.
- 1st Swell
- Southerly 2 to 2.5 metres.
- Weather
- Partly cloudy.
- Weather Situation
- A trough is brushing the far north coast and heading towards southeast Queensland, with fresh southerly winds in its wake. This trough is quickly followed by a ridge extends from a high passing to the south of the state. The ridge is expected to be the dominant feature through most of the week, apart from a brief incursion of a weak southerly change midweek, as a series of high pressure systems pass to the south through the week. Then, the next cold front looks set to cross the coastal waters Sunday through early next week.
Mary Bay Temperature Statistics View More
January Temperature
Point Perpendicular (13km)
Lowest 12 January, 2026
15.6 °CAverage January
20.9 °CHighest 10 January, 2026
39.6 °C
Climate (2021–Present)
Point Perpendicular (13km)
Average Low 2021–2026
14.7 °CAverage 2021–2026
17.4 °CAverage High 2021–2026
20.7 °C