Grantham Island Weather Forecast

Spencer Gulf Coastal Waters

Wind

East to southeasterly 10 to 15 knots tending southeast to southwesterly in the late afternoon then tending southeasterly in the evening. Winds reaching up to 20 knots north of Cowell to Wallaroo in the evening.

Seas

Around 1 metre, increasing to 1 to 1.5 metres north of Cowell to Wallaroo by early evening.

1st Swell

South to southwesterly around 1 metre, increasing to 1 to 1.5 metres south of Port Neill to Port Victoria.

Weather

Cloudy.

Weather Situation

A high pressure system south of Kangaroo Island will move slowly eastwards this weekend to be centred over the Tasman Sea on Monday. A trough is forecast to move across the western and central waters Tuesday afternoon and evening, pushing across southeastern coasts Wednesday morning. Another high pressure system is expected to become established south of the Bight later next week.