Shoalhaven River - Numbaa Island Weather Forecast
- 19
- 31
Shower or two. Possible storm
- 21
- 30
Becoming cloudy
- 17
- 29
Shower or two
- 14
- 31
Possible late shower
- 15
- 24
Shower or two
- 13
- 24
Partly cloudy
- 13
- 25
Partly cloudy
Today 21 Dec Illawarra
Partly cloudy. High chance of showers, most likely in the afternoon and evening. A thunderstorm likely in the afternoon and evening, possibly severe with damaging winds, large hail and heavy rain which may lead to flash flooding. Light winds becoming northwest to northeasterly 15 to 20 km/h in the middle of the day then tending west to northwesterly 15 to 25 km/h in the late afternoon. Overnight temperatures falling to between 17 and 21 with daytime temperatures reaching 30 to 36.
Illawarra Coastal Waters
Port Hacking to Ulladulla- Wind
- Variable about 10 knots becoming east to northeasterly 10 to 15 knots in the middle of the day then tending north to northeasterly in the evening. Winds reaching up to 20 knots offshore north of Port Kembla during the afternoon and evening.
- Seas
- Below 1 metre, increasing to 1 to 1.5 metres offshore north of Port Kembla by early evening.
- 1st Swell
- Northeasterly around 1 metre inshore, increasing to 1 to 1.5 metres offshore north of Port Kembla during the morning.
- Weather
- Becoming cloudy. 50% chance of showers. The chance of a thunderstorm during this afternoon and early evening.
- Weather Situation
- A high in the Tasman Sea is directing northerly winds over central and northern Coastal Waters while a weak coastal trough brings southerly winds to the remainder. A cold front will bring a fresh to strong southerly change to the southern half on Monday.
Shoalhaven River - Numbaa Island Temperature Statistics View More
December Temperature
Nowra (RAN Air Station) (16km)
Lowest 1 December, 2025
8.8 °CAverage December
21.1 °CHighest 19 December, 2025
40 °C
Climate (2020–Present)
Nowra (RAN Air Station) (16km)
Average Low 2020–2025
12 °CAverage 2020–2025
16.5 °CAverage High 2020–2025
22.4 °C