The agency said the quake was centred 97 kilometres south-east of Guatemala City.
“We felt a tremor that was a bit strong. We are monitoring the area but there is no damage here,” said Luis Medina from the Guatemalan tourist office in Puerto Quetzal, on the south coast.
“It was a light movement that lasted for a few seconds.”
The tremor was also felt in neighbouring El Salvador where windows on buildings shook but no major damage was reported.