Mason Bay Weather Forecast
- 15
- 24
Shower
- 10
- 20
Partly cloudy
- 11
- 18
Shower
- 8
- 17
Shower
- 8
- 21
Partly cloudy
- 10
- 24
Partly cloudy
- 13
- 23
Partly cloudy
Today 28 Sep South East Coastal
Partly cloudy. Slight chance of a shower. The chance of a thunderstorm in the late afternoon and evening, possibly severe with damaging winds, large hail and heavy rain which may lead to flash flooding in the east. Winds west to northwesterly 15 to 25 km/h becoming light in the evening.
Esperance Coastal Waters
Bremer Bay to Israelite Bay- Wind
- Northwest to southwesterly 15 to 20 knots, reaching up to 25 knots west of Hopetoun in the late evening.
- Seas
- Below 1 metre, increasing to 1 to 1.5 metres west of Hopetoun by early evening.
- 1st Swell
- Southwesterly 1.5 to 2 metres.
- Weather
- Partly cloudy. The chance of a thunderstorm in the late afternoon and evening, with possible squalls east of Esperance.
- Weather Situation
- A trough lies over southwest WA with a connected low south of the state. The trough is moving east as a ridge extends over the west coast. A cold front will cross the southwest corner of the state overnight on Tuesday with a ridge then dominating the synoptic pattern for the remainder of the working week.
Mason Bay Temperature Statistics View More
September Temperature
Hopetoun North (29km)
Lowest 5 September, 2026
6.2 °CAverage September
15.5 °CHighest 17 September, 2026
33.9 °C
Climate (2021–2026)
Hopetoun North (29km)
Average Low 2021–2026
12 °CAverage 2021–2026
16.4 °CAverage High 2021–2026
21.9 °C