How many places can I realistically visit in 7 days?

Two bases is comfortable: Athens plus one island, or two islands on the same ferry line. Three is possible but you lose a day or more to transfers.

Do I need to book ferries in advance?

In July and August, and on popular routes such as Piraeus to Santorini or Mykonos, yes, especially if you want a specific departure or a cabin. In spring and late autumn you can usually book a few days ahead.

What time is best to visit the Acropolis in summer?

The first entry slot of the day, or the last two hours before closing. Late morning to mid-afternoon is the hottest and most crowded part of the day.

What can I leave until I arrive?

Restaurants (outside a few famous sunset spots), most beaches, local buses, museum visits outside the Acropolis, and island car or scooter rental outside peak weeks.

First-Timer Mistakes in Greece 2026: What to Skip, What to Book, What Can Wait

I live in Greece, and most of the questions I get from first-time visitors are variations of the same few problems. None of them are dramatic. They just quietly eat time, money and patience. Here is what I would tell a friend before their first trip in 2026.

1. Trying to see Athens, Santorini and Mykonos in 7 days

On a map these three look close. In practice each move costs you most of a day: checking out, getting to the port or airport, waiting, travelling, checking in. With seven days and three bases you spend roughly two of them in transit, and the island days you do get are often the busiest ones.

What to do instead: choose two bases. Athens for two or three nights, then one island for four or five. If you really want two islands, pick ones on the same ferry line (Naxos and Paros, for example) so the hop is short and frequent. You can compare the main areas in our Santorini destination guide and Athens guide.

What can wait: deciding every day's plan. Leave at least one day per base unscheduled.

2. Booking the first Acropolis slot you see, after 11am in summer

Timed tickets make it easy to grab whatever slot is left when you finally open the booking page. In June to September, late morning and early afternoon on the rock is hot, exposed and crowded, and there is very little shade.

What to do instead: book the first entry of the day or one of the last two slots before closing, and do it as soon as your Athens dates are fixed. If you want context from a guide, a small early group is usually worth it. Our Acropolis tours guide explains the differences, and if you prefer a guided early entry you can check this small-group Acropolis tour.

What can wait: the Acropolis Museum. It is air-conditioned and easy to visit the same afternoon or another day without much planning.

3. Treating every island as a beach island

Greek islands are very different from each other. Santorini is mostly about the caldera views, villages and volcanic landscape; its beaches are dark sand or pebble and often windy. Hydra has almost no sandy beaches and no cars. Crete is big enough to need a car and several days. Naxos, Milos and parts of the Ionian are much stronger if long swims and sandy bays are your priority.

What to do instead: write down the two things you care about most (beaches, food, nightlife, walking, quiet, history) and choose the island that fits them, not the one with the most photos. Our where to stay guides describe what each area is actually like.

4. Ignoring ferry timing

Ferry schedules change with the season, the weather and the operator. Some routes run several times a day in August and once or twice a week in November. Fast boats are quicker but more affected by wind, especially in the Cyclades when the meltemi blows in July and August.

What to do instead:

Check real schedules for your exact dates before you book hotels on either end.
Avoid planning an international flight on the same day as a ferry back to Athens. Leave a buffer night.
If you are prone to seasickness, prefer larger conventional ferries over small high-speed boats.

What can wait: in shoulder season, short hops between nearby islands can often be booked a few days before.

5. Staying in the most photographed village with luggage and stairs

Oia and Fira in Santorini, and the old towns of many islands, are built on steps. Cars cannot reach many hotels, and porters are not always available or cheap. Arriving with two large suitcases in the midday heat is a very common first-day regret.

What to do instead: if you travel with big luggage, limited mobility or small children, check the hotel's exact access before booking: how many steps, whether a car can reach the door, and whether they help with bags. Villages like Imerovigli or Firostefani, or a base with road access, can give you the view without the climb. Our Santorini stay guide has more detail.

6. Waiting until arrival to book airport transport

Athens airport is about 35 to 60 minutes from the centre depending on traffic. Taxis are regulated and generally fine, but after a long flight, late at night or with a family and several bags, queues and uncertainty are the last thing you want. On islands with small airports, taxis can be very limited when several flights land together.

What to do instead: decide in advance. The metro and bus are good value if you travel light. For groups, late arrivals or lots of luggage, a pre-booked driver removes the guesswork. Our Athens airport transfer guide compares the options, and you can request a quote on our private transfers page.

What you can safely leave until you are in Greece

Most restaurant choices. Ask locals, walk a street back from the harbour, and eat when Greeks eat (late).
Most beaches and local buses.
Museums other than the Acropolis in peak season.
Car or scooter rental on smaller islands outside July and August.

A simple booking order

Flights in and out of Greece.
Your bases (Athens and one or two islands) and the ferries or flights between them.
Acropolis entry time and any one experience you would be sad to miss.
Airport transport for arrival night.
Everything else, loosely, once you are there.

If you are visiting at the end of summer, our September in Greece guide covers weather and crowds in more detail.