Jervis Bay Harbour Weather Forecast
- 17
- 33
Cloudy
- 15
- 21
Cloudy
- 15
- 23
Cloudy
- 15
- 27
Sunny
- 15
- 32
Sunny
- 18
- 32
Shower or two developing
- 18
- 30
Shower or two
Today 14 Dec Illawarra
Partly cloudy. Slight chance of a shower, most likely later this evening. Winds westerly 25 to 40 km/h shifting south to southeasterly 30 to 45 km/h in the evening.
Illawarra Coastal Waters
Port Hacking to Ulladulla- Wind
- Southerly 20 to 30 knots, reaching up to 35 knots offshore north of Port Kembla in the evening.
- Seas
- Around 1 metre, increasing to 1.5 to 2 metres south of Port Kembla.
- 1st Swell
- Southerly around 1 metre south of Port Kembla.
- Weather
- Cloudy.
- Weather Situation
- A trough and gusty wind change will continue moving north across the coastal waters, crossing the northern waters on Monday morning and early afternoon. A ridge extends over the coastal waters in the wake of the trough. The ridge will be maintained by a high in the Great Australian Bight that will move east across southeast Australia on Tuesday and into the Tasman Sea on Wednesday.
Jervis Bay Harbour Temperature Statistics View More
December Temperature
Point Perpendicular (9km)
Lowest 2 December, 2025
10.3 °CAverage December
20 °CHighest 5 December, 2025
33 °C
Climate (2020–Present)
Point Perpendicular (9km)
Average Low 2020–2025
14.7 °CAverage 2020–2025
17.4 °CAverage High 2020–2025
20.7 °C