Mary Street Lagoon Weather Forecast
- 16
- 28
Becoming windy. Sunny
- 17
- 31
Sunny
- 17
- 31
Sunny
- 19
- 32
Sunny
- 20
- 31
Sunny
- 20
- 31
Sunny
- 19
- 29
Mostly sunny
Today 28 Dec Mandurah
Sunny. Winds south to southeasterly 20 to 30 km/h turning southwesterly 30 to 45 km/h in the middle of the day then tending southerly 25 to 40 km/h in the evening.
Perth Local Waters
Two Rocks to Dawesville, inshore from Rottnest Island- Wind
- Southerly 20 to 30 knots tending south to southeasterly 15 to 25 knots before dawn then becoming south to southwesterly 25 to 30 knots in the afternoon.
- Seas
- 1.5 to 2.5 metres, decreasing to 1 to 1.5 metres during the morning, then increasing to 2 to 2.5 metres during the afternoon.
- 1st Swell
- Southwesterly 1 to 1.5 metres, decreasing to around 1 metre around midday.
- Weather
- Sunny.
- Weather Situation
- A ridge is developing along the south coast during the weekend in the wake of a trough that has moved inland.
Mary Street Lagoon Temperature Statistics View More
December Temperature
Mandurah (0km)
Lowest 21 December, 2025
14 °CAverage December
23.3 °CHighest 14 December, 2025
40.1 °C
Climate (2020–Present)
Mandurah (0km)
Average Low 2020–2025
15.1 °CAverage 2020–2025
19.2 °CAverage High 2020–2025
23.8 °C