Most people picture Greek sailing in high summer: whitewashed villages, packed anchorages and a stiff meltemi breeze. The charterers who come back year after year know a different truth — that September is when the Greek islands are at their best.
Kyriakoulis Yachts has experience of chartering Greek waters since 1980. Four decades on, September remains the month our most experienced clients ask for first — and once they have sailed it, few return to August. Here is what they know, and what you can expect.
What is the weather like in Greece in September?
September in Greece is summer with the sharp edges taken off. The intense heat of July and August has eased, but the season is still very much open.
The short version: warm, sunny and dry, with daytime highs typically in the mid-to-high 20s °C across the islands, and evenings mild enough for a light layer on deck.
The sea is the real story. The water spends all summer absorbing heat and releases it slowly — which means September often offers the most comfortable swimming of the whole year, with sea temperatures usually in the low-to-mid twenties. With the right region, you will still be swimming in October.
Rain is rare. The Aegean’s driest stretch of the year runs through late summer into September. The Ionian can see its first short autumn shower towards the end of the month, but a typical September week is blue sky after blue sky.
Sunlight still runs late — sunset stays after 7 pm for most of the month — and the light softens into the golden quality photographers chase.
September weather by sailing region
| Region | Daytime air | Sea | Wind | Character |
|---|---|---|---|---|
| Cyclades | Mid-20s to ~28 °C | Low-to-mid 20s °C | Meltemi easing, but a lively breeze most days | The classic Aegean — island-hopping at its best, minus the August crowds |
| Ionian | Mid-to-high 20s °C | Warmest of the season | Gentle thermal breezes | Calm, green and sheltered — Greece’s gentlest big sailing area |
| Dodecanese | High 20s °C | Warmest water of the four | Moderate breezes | Southern warmth that extends the season the longest |
| Saronic | Mid-20s °C | Warm | Light and forgiving | Short, protected hops — ideal for a relaxed week or long weekend from Athens |
Figures are typical September values (climate-normal based). Conditions vary from year to year and island to island — our charter team always shares the current forecast before you set off.
The meltemi in September: the wind everyone asks about
The meltemi is the strong northerly wind that shapes Greek summers — and the first question most first-time charter clients ask.
The facts: the meltemi season runs roughly from late June through September, peaking in July and August. By September its frequency drops and its strength eases noticeably. Early in the month the Cyclades can still serve up a brisk day or two — which experienced sailors enjoy, because it is what makes Aegean passages so fast and reliable. In the Ionian, the meltemi barely features at all.
What this means for you:
- Sailing is easier. You get the dependable breeze that makes the Cyclades a joy to sail, without the strong August days that keep novices on shore.
- Anchorages are calmer. Less wind means quieter nights at anchor and easier manoeuvring for less experienced crews.
- Forecasts are your friend. A quick check of the daily forecast, plus a briefing from the base team, removes the last uncertainty. If you are new to sailing, our beginner’s guide and the option of a skipper — or the stable platform of a catamaran — take care of the rest.
Why September beats July and August — and even June
- The warmest swimming of the year. The sea lags the air, so September water is often warmer than June’s.
- The crowds go home. European school holidays end in the last week of August. Anchorages that were packed in July are relaxed in September — you anchor where you want, and taverna tables appear without a wait.
- Everything is still open. Charter bases, marinas, ferries and island tavernas run at full strength through September. October is when the islands begin to wind down; September is the sweet spot where the season is alive but the pressure is off.
- Better value. Shoulder-season rates are typically lower than the July–August peak, and there is usually more choice of yacht and start date.
- The light. Long, golden evenings, softer heat for exploring ashore, and anchorages you actually want to sit in at sunset.
Where to sail in Greece in September
Every region works — but they suit different moods.
- The Cyclades — the classic choice. Paros, Naxos, Milos, Santorini and the small Cyclades, with reliable breeze and the postcard villages to yourselves in the evening. If you want the full Aegean experience in September, start here.
- The Ionian — Corfu, Lefkada, Kefalonia and Ithaca. Green hills, turquoise water, gentle winds and the calmest big-water sailing in Greece. The natural pick for families and anyone who wants serene rather than spectacular.
- The Dodecanese — Rhodes, Kos and the southern chain hold summer’s warmth longest. The region to choose for late-September and October departures — or simply for the longest swimming days.
- The Saronic Gulf — Aegina, Poros, Hydra and Spetses, close to Athens. Short passages, protected water and charming ports — ideal for a first charter or a September long weekend.
Not sure which region fits? Our charter consultants know these waters well and will recommend a route matched to your experience, your group and your dates.
What to pack for a September charter
The rule is layers, not winter gear:
- Swimwear and light clothing for the day — you will live in them
- A fleece or light windbreaker for evening passages and dinner on deck
- Comfortable non-marking deck shoes
- Sun protection — the September sun is still strong, even when the air is softer
- A light rain shell, just in case (mostly for the Ionian, late month)
Check the forecast with your base team before departure — and if you are deciding between bareboat and skippered, September is a forgiving month to learn, with safety as the foundation of every charter we run.
Is September a good month for first-timers?
Yes — arguably the best. Gentler winds than August, quieter harbours to practise in, bases that are busy but not frantic, and more time from the crew when you need it. If you have been waiting for the right moment for your first charter, this is it. Still weighing catamaran against monohull? Our detailed comparison covers the differences properly.
Frequently asked questions
Is September a good time to charter a yacht in Greece? Yes. September combines summer weather — warm air, warm sea, long sunny days — with lighter crowds and shoulder-season rates. Many regular charterers consider it the best month of the Greek season.
Is the sea warm enough to swim in Greece in September? Comfortably. The sea has been warming all summer and releases heat slowly, so September water is typically in the low-to-mid 20s °C — often warmer than June. The Dodecanese and Ionian stay swimmable into October.
Does the meltemi blow in September? It can, especially early in the month in the Cyclades — but far less often and less strongly than in July and August. Most September weeks enjoy a steady, manageable sailing breeze.
What is the weather like in the Greek islands in September? Warm and mostly dry: daytime highs typically in the mid-to-high 20s °C, mild evenings and plenty of sunshine. Rain is uncommon, particularly in the Aegean.
Is a yacht charter cheaper in September than in August? Generally yes. September falls in the shoulder season, so weekly rates are typically lower than the July–August peak, and you will usually find more choice of yacht and start dates.
Are the islands still lively in September? Yes — and this is the difference between September and October. Tavernas, shops, marinas and ferry connections still run at full strength, while the peak-season crowds have gone. You get the energy without the squeeze.
Plan your September charter
Greece in September is the best-kept secret of the sailing season: summer weather, an open season and the sea at its most welcoming. Whether you are an experienced crew chasing a final week of breeze in the Cyclades, or a family trying the water for the first time in the Ionian, this is the month to go.
Browse our charter fleet and talk to our team about availability for September — or tell us your dates and we will recommend the yacht and base to match. With four decades of Greek charter experience and bases across the Cyclades, Ionian, Dodecanese and Saronic, we will find your week on the water.