Blenheim Beach Weather Forecast
- 12
- 15
Showers
- 11
- 19
Partly cloudy
- 7
- 22
Mostly sunny
- 10
- 28
Sunny
- 15
- 30
Sunny
- 16
- 25
Showers
- 13
- 20
Shower or two
Today 27 Sep Illawarra
Cloudy. Very high chance of showers, becoming less likely in the late afternoon and evening. Winds southeasterly 20 to 30 km/h becoming light in the evening then becoming south to southeasterly 15 to 20 km/h in the late evening. Daytime maximum temperatures between 10 and 16.
Illawarra Coastal Waters
Port Hacking to Ulladulla- Wind
- Southeasterly 15 to 20 knots, reaching up to 30 knots north of Point Perpendicular in the late morning.
- Seas
- 1.5 to 2 metres, decreasing to 1 to 1.5 metres by early evening.
- 1st Swell
- Southerly 1.5 metres, increasing to 1.5 to 2 metres by early evening, then tending south to southeasterly 1.5 to 2 metres later in the evening.
- Weather
- Cloudy. 80% chance of showers.
- Weather Situation
- A cold front and trough will pass over the Tasman Sea bringing a southerly change northward along the NSW coast. A ridge of high pressure will build over the coastal waters in the wake of the southerly change, turning winds east to northeasterly over the coastal waters for the early days of the week.
Blenheim Beach Temperature Statistics View More
September Temperature
Point Perpendicular (10km)
Lowest 18 September, 2026
9.6 °CAverage September
17 °CHighest 19 September, 2026
29.1 °C
Climate (2021–2026)
Point Perpendicular (10km)
Average Low 2021–2026
14.9 °CAverage 2021–2026
17.5 °CAverage High 2021–2026
20.9 °C