Mary Bay Weather Forecast
- 20
- 27
Shower or two
- 18
- 24
Shower or two
- 18
- 25
Shower or two
- 19
- 25
Shower or two
- 19
- 25
Shower or two
- 19
- 26
Shower or two
- 17
- 27
Partly cloudy
Today 25 Feb Illawarra
Partly cloudy. The chance of fog about higher ground in the early morning. High chance of showers, most likely in the afternoon and evening. The chance of a thunderstorm in the afternoon and evening. Winds north to northeasterly 15 to 20 km/h becoming light before dawn then becoming south to southeasterly 20 to 30 km/h in the middle of the day. Overnight temperatures falling to between 17 and 21 with daytime temperatures reaching the mid to high 20s.
Illawarra Coastal Waters
Port Hacking to Ulladulla- Wind
- Northerly 15 to 25 knots shifting southerly in the late morning and early afternoon.
- Seas
- 1.5 to 2 metres, decreasing to 1 to 1.5 metres during the morning, then increasing to 1 to 2 metres by early evening.
- 1st Swell
- Southerly around 1 metre.
- Weather
- Becoming cloudy. 70% chance of showers late this afternoon and evening. The chance of a thunderstorm during this afternoon and evening.
- Weather Situation
- A high pressure system over the Tasman Sea extends a ridge towards the north coast. A trough is forecast to cross the southern and central parts of the coast today, bringing a fresh southerly wind change in its wake, before stalling about the Central Coast on Thursday and gradually weakening later in the week. This system will be followed by a high pressure system passing to the south, maintaining onshore easterly airstream across the coastal waters through the second half of the week.
Mary Bay Temperature Statistics View More
February Temperature
Point Perpendicular (13km)
Lowest 2 February, 2026
15.4 °CAverage February
21.6 °CHighest 11 February, 2026
31.7 °C
Climate (2021–Present)
Point Perpendicular (13km)
Average Low 2021–2026
14.7 °CAverage 2021–2026
17.4 °CAverage High 2021–2026
20.8 °C