Upper South East Coastal Waters Forecast: Murray Mouth to Cape Jaffa

View the current warnings for South Australia

Forecast updated at 8:20 pm CST on Wednesday 17 September 2025.

Weather Situation

A high pressure system over the state will move east tonight to be over NSW Thursday morning. A weak trough will move over South Australian waters on Thursday. A cold front will pass over the south on Friday followed by a southwesterly flow that is expected to persist through the weekend owing to a ridge of high pressure extending over northern parts of the state.

Forecast for Wednesday until midnight

Winds
Northerly 10 to 15 knots.
Seas
Below 1 metre.
Swell
Southwesterly 4 metres.
Weather
Mostly clear.

Thursday 18 September

Winds
Northerly 10 to 15 knots, reaching up to 20 knots south of Salt Creek during the morning and early afternoon. Winds turning west to northwesterly during the afternoon and evening.
Seas
Around 1 metre, increasing to 1 to 1.5 metres offshore during the morning.
Swell
Southwesterly 3 to 4 metres, decreasing to 3 metres during the morning, then tending westerly 2 to 3 metres around midday.
Weather
Mostly sunny.

Friday 19 September

Winds
Westerly 15 to 25 knots tending west to northwesterly 20 to 30 knots in the morning then tending west to southwesterly 25 to 30 knots in the late afternoon.
Seas
Around 1 metre, increasing to 1 to 1.5 metres during the morning, then increasing to 2 to 3 metres around midday.
Swell
West to southwesterly 2 to 3 metres, increasing to 2.5 to 4 metres south of Salt Creek by early evening.
Weather
Partly cloudy. 80% chance of showers.

Saturday 20 September

Winds
Southwesterly 20 to 30 knots turning westerly 20 to 25 knots during the morning.
Seas
1.5 to 2.5 metres.
Swell
Southwesterly 4 to 5 metres.
Weather
Cloudy. 70% chance of showers.

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.

Nearby Coastal Waters

WA - Eucla Coast - Coastal Waters Forecast Vic - West Coast - Coastal Waters Forecast SA - Lower South East Coast - Coastal Waters Forecast SA - Upper South East Coast - Coastal Waters Forecast SA - Adelaide Metropolitan Waters Forecast SA - Gulf St Vincent - Coastal Waters Forecast SA - Spencer Gulf - Coastal Waters Forecast SA - Investigator Strait - Coastal Waters Forecast SA - South Central Coast - Coastal Waters Forecast SA - Central Coast - Coastal Waters Forecast SA - Lower West Coast - Coastal Waters Forecast SA - Upper West Coast - Coastal Waters Forecast SA - Far West Coast - Coastal Waters Forecast

The next routine forecast will be issued at 5:10 am CST Thursday.

Product IDS11066