View the current warnings for Western Australia
Forecast issued at 7:01 pm WST on Wednesday 18 February 2026.
Weather Situation
A west coast trough has developed, and is expected to deepen on Thursday before moving inland later in the day with a cold front passing to the south on Friday. A second cold front is expected to follow during Saturday morning, before another ridge extends over the southwest, resulting in fresh southerly winds tending fresh to strong south to southwesterly in the afternoon.
Forecast for Wednesday until midnight
- Winds
- Southerly 15 to 20 knots.
- Seas
- 1 to 1.5 metres.
- Swell
- Southwesterly around 1 metre.
- Weather
- Clear.
Thursday 19 February
- Winds
- South to southeasterly 10 to 15 knots becoming variable about 10 knots in the early morning then becoming south to southwesterly 15 to 20 knots in the early afternoon.
- Seas
- Around 1 metre, decreasing below 0.5 metres during the morning, then increasing to around 1 metre during the afternoon.
- Swell
- Southwesterly 1 to 1.5 metres, decreasing to around 1 metre during the morning.
- Weather
- Sunny.
Friday 20 February
- Winds
- South to southwesterly 15 to 25 knots becoming southerly 20 to 30 knots in the late evening.
- Seas
- 1 to 1.5 metres, decreasing to 1 metre during the morning, then increasing to 1 to 2 metres during the afternoon.
- Swell
- Southwesterly around 1 metre.
- Weather
- Sunny.
Saturday 21 February
- Winds
- Southerly 15 to 20 knots inshore grading 20 to 25 knots offshore, reaching up to 30 knots south and west of Rottnest Island before dawn. Winds becoming south to southwesterly 20 to 25 knots in the early afternoon then increasing to 25 to 30 knots in late afternoon. Winds tending southerly in late evening.
- Seas
- 1.5 to 2 metres inshore increasing to 2 to 2.5 metres offshore. Seas increasing to 2 to 2.5 metres throughout in the late evening.
- Swell
- Southwesterly around 1 metre, increasing to 1 to 1.5 metres during the morning.
- Weather
- Mostly sunny.
Sunday 22 February
- Winds
- South to southeasterly 20 to 30 knots.
- Seas
- 1.5 to 2.5 metres, decreasing to 1 to 1.5 metres during the morning.
- Swell
- Southwesterly 1 to 1.5 metres, increasing to 1.5 to 2 metres during the morning.
- Weather
- Mostly sunny.
Please be awareWind and wave forecasts are averages. Wind gusts can be 40 per cent stronger than the forecast, and stronger still in squalls and thunderstorms. Maximum waves can be twice the forecast height.
- This forecast is also available via scheduled broadcasts on marine radio.
- Latest Coastal Observations
- Tide Predictions
- Marine Knowledge Centre - explanations and definitions
The next routine forecast will be issued at 1:01 am WST Thursday.
Product IDW11400