Hundreds of West Australian school leavers are stranded on Rottnest Island after ferry services were cancelled due to dangerous weather.
Swells of up to seven metres are expected in waters between Fremantle and Rottnest today.
Official leavers celebrations end today but those on the island may have to spend an extra night.
The Rottnest Island Authority's Paolo Amaranti says they will be taken good care of and parents should not panic.
"We're advising leavers to notify their parents that they are all ok, we're looking after them," he said.
"They can stay in their accommodation, there'll be no charge if they stay an extra night, but we will do everything we can to ensure they're still enjoying themselves while they're on the island."
Authorities will reassess the weather situation each hour.
Meanwhile, South West police say the wild weather has made the end of leavers celebrations a disappointment for organisers as well as teenagers.
A number of school leavers who had been camping in Dunsborough packed up and went home before last night's storm.
Sergeant Craig Anderson says 12 months of planning went into organising the celebrations.
He says some events may continue today.
"Today we are looking to salvage what we can, and if the easing conditions allows us to put on some events today, then the committee is certainly looking to do that for them."
© ABC 2012
13:27 EDT Large and powerful surf is hitting parts of the east coast this weekend, creating dangerous conditions for much of the public, but great for experienced surfers.