Grassy Island Weather Forecast
- 25
- 32
Partly cloudy
- 24
- 31
Partly cloudy
- 24
- 31
Partly cloudy
- 25
- 31
Shower
- 25
- 31
Shower
- 24
- 30
Shower
- 23
- 31
Shower
Today 20 Jan Central Coast and Whitsundays
Partly cloudy. Medium chance of showers in the north, slight chance elsewhere. The chance of a thunderstorm in the north in the afternoon and evening. Winds southeasterly 15 to 20 km/h tending northeast to southeasterly in the late afternoon then becoming light in the evening. Overnight temperatures falling to the low to mid 20s with daytime temperatures reaching the low to mid 30s.
Mackay Costal Waters
Bowen to St Lawrence- Wind
- Southeasterly 15 to 20 knots, reaching up to 25 knots offshore south of Mackay during the morning and early afternoon.
- Seas
- 1 to 2 metres, decreasing to 1 to 1.5 metres around midday.
- 1st Swell
- Easterly below 1 metre inshore, increasing to 1 to 2 metres offshore.
- Weather
- Partly cloudy.
- Weather Situation
- A weak trough extends across Cape York Peninsula into North Queensland Waters north of Cairns and may become more monsoon like by the middle of this week. A tropical low may form within the trough before moving into the northwestern Coral Sea from Wednesday or Thursday. A weak ridge will extend over northern Queensland waters south of the trough until Tuesday, with a weak pressure gradient persisting for the following few days.
Grassy Island Temperature Statistics View More
January Temperature
Proserpine Airport (39km)
Lowest 1 January, 2026
21.8 °CAverage January
26.2 °CHighest 17 January, 2026
32.7 °C
Climate (2021–Present)
Proserpine Airport (39km)
Average Low 2021–2026
18.1 °CAverage 2021–2026
22.9 °CAverage High 2021–2026
29.2 °C