Roads flooded, trees down as South Australia smashed by powerful storm surge

South Australians have been warned about a powerful storm surge that is smashing the state's coast - and drawing plenty of onlookers while it's at it.

The surge, the second to hit the state in 24 hours (and the strongest of the two), has caused damage and disruption along the coastline, with the SES issuing ongoing alerts.

The event attracted considerable attention, with many people observing the large waves along Adelaide's coast. 

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However, the spectacle presented hazards, particularly in areas like Port Noarlunga, where heavy rainfall flooded roads.

Businesses near the state's beaches, such as the Broadway Kiosk at Glenelg, took preventative measures, including sandbagging, to minimise potential damage.

The impact extended beyond Adelaide, with dangerous sea levels also reported in the state's south-east. At Port MacDonnell, the jetty was submerged under the swell, while in Kingston, streets were inundated as the tide rose.

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The overflowing of foreshore creeks exacerbated the flooding in Kingston, with seawater flowing into streets. 

"It's pretty crazy," local worker Kyle Hampel said.

The same strong winds that contributed to the storm surge also caused trees to fall across the suburbs and the Adelaide Hills. 

Wind gusts exceeding 90 kilometres per hour were recorded, and the conditions are expected to persist into the night.

This article was produced with the assistance of 9ExPress.