Deaths in 2012 hit 105 - the highest ever - almost double the 55 deaths in 2007. However, Swedish visitors fell after the 2004 tsunami and have only returned in recent years to high numbers.
Mr Kageby said 41 percent of last year's deaths among Swedes were accidental - motorcycle crashes, drownings, electrocutions and balcony falls included.
Four young Swedes died in one freakish crash north of Phuket when a truck became airborne and crushed them and their Thai taxi driver.
The death rate among Swedes has remained relatively high with 28 fatalities recorded in the first three months of 2013.
''The Swedes who live in Thailand are also growing older, so nature takes its course among them,'' Mr Kageby said.
''What Swedes need to remember is that the insurance coverage they have in Sweden and throughout the EU does not exist in Thailand.
''People who visit as tourists or who come here to live should remember the importance of insurance.''
About 400,000 Swedes visit Thailand each year and a large proportion of them travel to Phuket, Phang Nga and Krabi.
Some 540 Swedes were among the 5400 victims of the 2004 tsunami in Thailand.