Greece is generally and mostly safe for travellers. While violent crimes are rare, petty crimes such as theft and pickpocketing are still ongoing problems. Particularly so in busy and crowded places like central Athens and Thessaloniki. Thus, it is important to remain vigilant and alert on the streets and on public transport.
Also, Greece was ranked the fourth highest in road traffic fatalities in the European Union in 2022. Thus it is important to practise safe driving if doing so in the mountainous areas of the mainland. As a pedestrian, always keep a lookout for vehicles, stay cautious and alert.
If and when hiking, exercise common sense by staying on pathways, avoiding being too close to cliff edges and completing the hikes in advance of the sunset. Bring food and water as well, especially during the hot summers. In June 2024 itself, six hikers have been reported dead, coinciding with extreme hot temperatures during the month.
Lastly, take care that water may not be drinkable from the tap on the Greek islands. Always ask your host to be sure. Also, not all islands are equipped with medical facilities or hospitals. Hence, make sure to protect yourself and/or ensure you have your medications with you if this is of concern to you.