The Rest and Be Thankful has reopened under traffic light control following a safety inspection.
However, the road will close again at 6pm due to heavy rain being forecasted overnight.
The route was closed at 6pm yesterday due to a similar forecast.
All traffic was switched to the Old Military Road local diversion route which runs parallel to the A93.
Following a geotechnical assessment and safety inspection of the hillside at first light this morning the Rest and Be Thankful was reopened.
Further rainfall is expected across Argyll tonight and early Saturday morning, so all road users will be switched to the Old Military Road as a safety precaution.
Motorists have been warned that the A83 will continue to be monitored this weekend and closed when necessary.
Work is ongoing to stabilise the hillside at the Rest and Be Thankful, with a debris pit being installed along with a catch-fence.
Eddie Ross, Bear Scotland’s north-west representative said: “The A83 reopened under traffic light control at around 8.30am following a thorough safety assessment by our geotechnical team.
“We’ve been closely monitoring the weather conditions and forecast at the Rest, and with more rain expected to impact the area overnight, we’ve taken the decision to close the A83 again at 6pm this evening as a safety precaution during the hours of darkness.
“We have to put road user’s safety first, and with more rain expected after a consistent period of wet weather this week, we believe the closure of the A83, as a safety precaution, during the hours of darkness to be the right approach due to limitations in being able to identify sudden changes in conditions on the hillside at night.
“We’re doing everything we can to keep disruption to road users on the A83 to a minimum, and as ever we thank road users and the local community for their patience while we continue with this work at the Rest.”