Sunscreen!!!
If you're going to Greece, make sure you do some weather research first. While the summer is considered the greatest season to visit, July and August are extremely hot. Consider visiting Greece in May, June, or September, when the tourist season is at its peak.
Summer is a popular time to visit Greece because of the beautiful Mediterranean temperature. If you want to unwind by the pool or at the beach, this is the place to be. Greece, in fact, proudly holds the title of "sunniest" European country, with more than 250 sunny days, and the sun is strong even before summer arrives, so bring some sunscreen.
However, if you're coming to Greece primarily for tourism and visiting notable historical sites, you might choose to travel during the milder months. Summers in Greece are frequently scorching. As in, it's so hot that climbing to the Parthenon will almost cause heatstroke. You can become sunburned even if you don't plan on going to the beach or staying outside. Many tourist attractions may charge you more for sunscreen than your local store. If you're visiting Greece on a tight budget, make sure to bring sunscreen with you.