Haystack Island Weather Forecast
- 12
- 17
Possible shower
- 11
- 16
Cloudy
- 10
- 16
Cloudy
- 9
- 16
Mostly sunny
- 10
- 20
Sunny
- 13
- 22
Sunny
- 13
- 17
Cloudy
Today 14 Sep Yorke Peninsula
Cloudy. The chance of fog in the north early this morning. Slight chance of a shower, most likely later tonight. Winds westerly 15 to 20 km/h turning southwesterly 15 to 25 km/h during the day. Daytime maximum temperatures around 18.
Investigator Strait Coastal Waters
- Wind
- Westerly 10 to 15 knots turning southwesterly in the late evening. Winds reaching up to 20 knots inshore in the late evening.
- Seas
- Around 1 metre.
- 1st Swell
- West to southwesterly around 1 metre, increasing to 1 to 1.5 metres during the morning.
- Weather
- Cloudy.
- Weather Situation
- A high pressure ridge builds across much of SA, as a cold front slips across southern coasts late today into early Tuesday. A high pressure system will then move across waters to the south throughout the week to be centred over Victoria by Thursday. A low pressure trough in the interior of WA may extend into far western parts at times before weakening by late Tuesday.
Haystack Island Temperature Statistics View More
September Temperature
Stenhouse Bay (5km)
Lowest 8 September, 2026
8.9 °CAverage September
14.2 °CHighest 12 September, 2026
25.2 °C
Climate (2021–2026)
Stenhouse Bay (5km)
Average Low 2021–2026
13.2 °CAverage 2021–2026
16.1 °CAverage High 2021–2026
20.5 °C