Warm Greek Islands in September
Warm Greek islands in September are the southernmost Dodecanese and Crete where summer holds on longest. Crete with Heraklion, Chania and Elounda averaging 26-28C daytime, Rhodes with Rhodes Town and Lindos averaging 26-28C, Karpathos with Pigadia and Amoopi around 26C, Kasos, Chalki and Symi near Rhodes at 26-27C, Kos with Kos Town and Kardamena around 26C, Kastellorizo as Greece’s easternmost and often warmest small island at 27-28C, and Gavdos as Greece’s southernmost point south of Crete.
Known for ideal late-summer swimming with sea temperatures 24-26C, 9-10 hours of sun and lighter Meltemi winds, so warm days but more comfortable nights at 20-22C. September brings fewer crowds and still-long beach days on Crete, Rhodes, Karpathos, Kos and Kastellorizo, while northern islands like Corfu, Thassos, Skiathos and Lefkada cool faster to 23-25C with sea around 22-23C.
| Island | Description |
|---|---|
| Crete | Country in itself with Knossos and Samaria Gorge and Elafonisi pink beach and Balos lagoon, warmest September island with average around 24 degrees and south coast at its warmest in September often over 30 degrees at end of September. |
| Rhodes | Medieval capital Knights Old Town Lindos Faliraki Bar Street 300 days sun, September average temperature 28C with less than 10mm rain and average high 26.8C and average daily 25C with high around 27C and minimum around 21C and sea 24-25C, still very pleasant and warm. |
| Gavdos | Europe's southernmost point below Crete cedar forest Tripiti chair Libyan Sea hippie nudist, southernmost island in Greece and all of Europe so sea stays hottest longest. |
| Kastellorizo | Megisti farthest east 2km from Turkey pastel harbor and Blue Cave that glows blue, far south-east Dodecanese annual 21.9C and mildest winter corridor. |
| Karpathos | Time-capsule Olympos where women still wear embroidered dress and speak Dorian dialect with windy south for surf, between Rhodes and Crete hottest destination average 30C summer. |
| Kasos | Bare and brave with heroic 1824 history and Bouka pirate port traditional music, part of Rhodes Port Kasos Karpathos Kastellorizo mildest winters in Europe. |
| Chrissi | Golden island off Crete golden sand largest natural cedar forest uninhabited protected park off Ierapetra sunniest part Greece year-round. |
| Koufonisi | Tiny paradise barely 3.5km but Pori beach and Gala sea pools voted among best beaches in Europe no cars needed. |
| Chalki | Restored elegance once abandoned now restored Italian mansions Nimporio harbor painted pastel car-free peace. |
| Symi | Dazzling neo-classical harbor pastel mansions stacked like theater set sponge diving history Panormitis Monastery day-trip from Rhodes. |
| Tilos | Ecotourism pioneer dwarf elephant fossils nature reserve open-air museum WWII off-grid sustainable. |
| Nisyros | Volcano you walk into active Stefanos crater sulphur vents whitewashed Mandraki tiny black-rock beaches. |
| Saria | Pirate ruins wild north of Karpathos ancient Nisyros ruins Eleonora falcons. |
| Ro | Patriotic island Lady of Ro raised Greek flag daily 40 years alone one house next to Kastellorizo. |
| Strongyli | Lighthouse islet easternmost Greece 4.5km off Kastellorizo. |
| Kos | Hippocrates birthplace cycling island Asklepieion sandy beaches Roman ruins all-night clubs in Kardamena, Dodecanese warm inviting waters. |
| Kalymnos | Sponge divers island turned world climbing capital 3,400+ climbing routes sponge museums Pothia quiet beach bars. |
| Leros | War island Italian Art Deco town Lakki WWII war tunnels wrecks mental hospital history calm yacht harbors like Alinda. |
| Patmos | Jerusalem of Aegean where St John wrote Revelation Cave of Apocalypse fortress monastery Chora UNESCO quiet spiritual luxury. |
| Leipsoi | Calm Dodecanese 24 islets around Panagia tou Harou blooms lilies natural harbor eco ethos. |
| Agathonisi | Northernmost Dodecanese 3 hamlets wild thymes close to Samos and Turkey 2 ferries week feel. |
| Arkoi | Four people island one taverna at port run by island's family goats anchorage yachts. |
| Farmakonisi | Hippocrates exile where Hippocrates was exiled now military outpost near Turkey disputed. |
| Pserimos | Day-trip beach island off Kalymnos/Kos one beach one taverna beach barbecue boats. |
| Telendos | Rock island off Kalymnos 500m strait car-free huge cliff for climbing old early Christian basilicas. |
| Kalolimnos | Goat island between Kalymnos and Leros lighthouse keepers wild goats. |
| Astypalaia | Butterfly island shape butterfly Venetian castle Chora like Santorini but empty Dodecanese-Cyclades hybrid. |
| Anafi | Anafi rise Monolith Kalamos second highest rock Mediterranean after Gibraltar wild hiking empty beaches. |
| Santorini | The caldera Oia sunsets black sand beaches volcano middle luxury honeymoon caves Assyrtiko wine PK Cocktail not clubbing but high-end sunset drinking, sea 24-25C in September and still highly swimmable particularly southern islands like Crete Rhodes and Santorini which enjoy longer summer. |
| Therasia | Santorini's mirror what Santorini was 30 years ago caldera views without crowds Riva port. |
| Sikinos | Empty Cycladic Manalis temple Chora ridge least-visited inhabited Cycladic islands southern. |
| Sapientza | Cedar forest islet off Methoni dense forest Calypso myth free wild horses southern Peloponnese. |
| Elafonisos | Caribbean Greece Simos beach double bay white sand emerald water tiny off Peloponnese often called best beach in Greece, September still warm. |
| Kythira | Off Peloponnese waterfalls Neraida and Fonissa Chora castle Kapsali double bay myth Aphrodite washing ashore here, southern enough for 25C+ September. |
| Schinoussa | Gastronomy Small Cyclades fava local products Tsigouri beach flat low island great food, Small Cyclades warm September sea 24-25C. |
| Irakleia | Wild caves Livadi bay and Cave of Polyphemus where Cyclops lived per myth Small Cyclades quiet, same warm September sea. |
| Donousa | Remote Small Cyclades Kedros beach nudist free camping history tiny Donousa Town off-grid, Small Cyclades warm September. |
| Amorgos | The Big Blue Le Grand Bleu filmed here 300m cliff monastery Hozoviotissa bolted to rock endless hiking freediving, south-east Cyclades warm September. |
| Folegandros | Cliff-edge drama Chora perched 200m over sea Kastro medieval walls Ano Meria Agali beach known for minimalist luxury quiet romance, southern Cyclades warm September. |
| Ios | Ultimate backpacker party island Mylopotas Beach FarOut Beach Club by day Chora pub crawl by night Scorpion Sweet Irish Dream Disco 69 young cheap relentless, central but southern enough warm September. |
| Milos | Island of colors where Venus de Milo was found Sarakiniko white lunar rocks Kleftiko sea caves colorful syrmata boat garages growing boho beach bar scene, western Cyclades but September 25C. |
| Polyaigos | Wild goats island largest uninhabited in Greece countless beaches endemic goats near Milos, September warm. |
| Kimolos | Chalk island white chalk cliffs Prassa beach medieval Kastro quiet neighbor Milos hot springs. |
| Sifnos | Chef's island home of national chef Nikolaos Tselementes pottery kilns everywhere endless food festivals beautiful terraced hills, western Cyclades September warm. |
| Serifos | Iron island abandoned iron mines rusting loaders Mega Livadi wild Cycladic minimalism Chora high on hill. |
| Paros | Chic cosmopolitan Cycladic hub Naoussa fishing port turned luxury bars Parikia Kolymbithres rock beach world-class windsurfing Golden Beach balanced party family, September perfect 25-30C warm swimmable. |
| Antiparos | Paros's laid-back little sister famous huge cave Soros beach developed by Tom Hanks celebs but still boho low-key beach bars. |
| Naxos | Largest Cycladic island Portara Temple gate Mount Zas highest in Cyclades endless sandy beaches like Plaka kitesurfing Kitron liqueur Ocean Club parties, September still 25C+. |
| Mykonos | Ibiza of Greece known globally for luxury beach clubs at Paradise Super Paradise Cavo Paradiso clifftop megaclub Little Venice windmills A-list gay party scene sunrise to sunrise, September perfect warm swimmable. |
| Syros | Capital of Cyclades Ermoupoli neoclassical mansions Miaouli Square Ano Syros medieval town Catholic Orthodox mix refined cafe bar scene not beach-party, but September warm. |
| Andros | Greenest Cycladic island waterfalls Pythara Chora neoclassical shipowner mansions contemporary art museum strong hiking network, September still warm. |
| Tinos | Religious artistic Panagia Evangelistria Greece's Lourdes pilgrimage 750 marble-carved dovecotes marble sculptors surf at Kolymbithra Exomvourgo rock, September warm. |
| Kea | Tzia Stone Lion ancient sculpture Karthea ruins hike oak forests closest Cycladic to Athens Athenian yacht weekend island, September warm. |
| Kythnos | Hot springs island Kolona sandbar connecting two islands beach both sides Loutra thermal springs bubbling into sea 65 beaches, September warm. |
| Aegina | Pistachio island famous PDO pistachios Temple of Aphaia Parthenon views fishermen at Perdika 45 mins from Athens big weekend scene, September warm. |
| Agistri | 1 hour from Athens pine island bike everywhere Chalikiada and Aponissos beaches Saronic quick escape, September warm sea. |
| Hydra | No cars at all donkeys only stone mansions Leonard Cohen's house Hydra art school chic yacht crowd sunset drinks at Hydronetta over sea. |
| Poros | Two islands joined by bridge clock tower over strait lemon forest across at Galatas pine scent historic Russian dockyard. |
| Spetses | Pine-covered Saronic luxury no cars on waterfront carriages Bouboulina heroine mansion Armata festival old money Athens families elegant cocktail bars. |
| Salamina | Largest Saronic island known for 480BC Battle of Salamis naval base pine forests working island suburb of Athens not tourist resort. |
| Kefalonia | Cinematic island Myrtos Beach Melissani underground lake cave Assos village Fiskardo yachts De Bosset Bridge Captain Corelli's Mandolin filmed here, Ionian but September 25-30C warm swimmable sea lower prices. |
| Zakynthos | Shipwreck Beach Navagio from postcards Blue Caves Laganas strip 2km clubs like Rescue and Zeros also loggerhead turtles at Laganas Bay, Ionian September warm. |
| Lefkada | Connected to mainland by causeway towering white cliffs Porto Katsiki Egremni windsurfing Vassiliki lively bars Lefkada Town Nidri, September warm. |
| Paxos | Tiny Ionian jewel dense olive groves Tripitos Arch Blue Caves Gaios harbor yachts and nearby Antipaxos insane blue water. |
| Antipaxos | Vineyard islet famous for Voutoumi and Vrika beaches neon blue water no villages just vineyards and one taverna, September sea 24-25C. |
| Ithaca | Homer's island home of Odysseus Vathy horseshoe harbor Afales Bay myth quiet sailing island no mass tourism. |
| Meganisi | Sailors hideout three villages on ridge hidden sea caves like Papanikolis used by submarines in WWII next to Skorpios. |
| Skorpios | Onassis private island where Jackie O married Onassis private weddings off Lefkada Meganisi. |
| Kalamos | Ionian forest island densely pine-covered two villages no airport quiet yacht stop. |
| Kastos | Low flat Lefkada satellite 30 people 1 taverna no cars old windmills. |
| Atokos | Private Onassis island uninhabited goat island owned by Onassis family Ionian. |
| Arkoudi | Bear-shaped uninhabited Ionian between Lefkada and Ithaca bear silhouette one beach. |
Warm Greek Islands in September are Crete south, Rhodes Lindos, Karpathos south, Kos south and Kastellorizo — 28C sea 26C warmest sea
Warm Greek Islands in September are Dodecanese and Crete south — September still summer sea warmest year. Crete south coast warmest September — Matala Loutro Sfakia Ierapetra Gavdos — September 28C day 19C night sea 26C south sheltered sun 9h warmest big island, north Heraklion 27C cooler Meltemi ending. Rhodes second warmest September — Lindos Faliraki Gennadi east — September 28C day 20C night sea 26C sun 9h warmest Dodecanese, Rhodes Town north 27C windier.
Karpathos third — south Amoopi — September 27C day 19C night sea 25C sheltered south warm vs north windy cooler. Kos fourth — south Kardamena Kefalos — September 27C day 19C night sea 25C south warmest side. Kastellorizo fifth — easternmost — September 28C day 20C night sea 27C warmest sea September Greece sun trap 2km Turkey.
September best month — hot but not 35C July — sea 25-27C warmest — Cyclades 26C, Ionian 26C — Meltemi weaker calm.
September warm ranking — Crete south and Rhodes sea bath
Guide nuance: warm Greek Islands in September need south latitude shelter plus warm sea accumulated summer — September Greece north still warm but sea cooler — Corfu 26C sea 24C, Mykonos Santorini 26C sea 24C windy 5 beaufort. Crete south warmest September because White Mountains block Meltemi north wind — Loutro Sfakia Matala Ierapetra sun trap south-facing — September 28C day feels 30C but sea 26C warmest big — plus Gavdos south of Crete 28C officially warmest September Greece. Rhodes Lindos warmest September Dodecanese east sheltered — Lindos bay sun trap 28C sea 26C — Rhodes Town north windy 27C but Lindos sheltered warmer 28C.
Karpathos south Amoopi September 27C sheltered bay warm vs north Olympos 26C windy. Kos south Kardamena September 27C sheltered south vs Marmari north windy. Kastellorizo harbor sheltered 28C sea 27C warmest sea September — walls sun trap — tiny island hottest sea Greece. Kasos Chalki Symi Telos similar 27-28C sea 26C.
So warm Greek Islands in September order: Kastellorizo 28C sea 27C warmest sea Greece September small, Crete south Matala Loutro Sfakia Ierapetra Gavdos 28C sea 26C warmest big island, Rhodes Lindos Gennadi Faliraki 28C sea 26C warmest Dodecanese, Karpathos south Amoopi 27C sea 25C, Kos south Kardamena Kefalos 27C sea 25C. Pick Crete south Matala Loutro if warmest September big with calm sea, Rhodes Lindos if Dodecanese warmest sea bath, Kastellorizo if hottest sea 27C. September best month 28C not 35C July — sea warmest year 25-27C — night 19-20C warm no jacket — Meltemi ending calm — no wildfire.
Sources
- https://www.weather-and-climate.com/greece | Greece September average temperature 28C and less than 10mm rain in Rhodes still great month
- https://www.davestravelpages.com/best-greek-islands-in-september/ | Best Greek islands September 25-30C warm swimmable sea Crete warmest September island Rhodes most islands good
- https://weather-atlas.com/en/greece/rhodes-weather-september | Rhodes average high September 26.8C low 24C
- https://www.holiday-weather.com/rhodes/averages/september/ | Rhodes average daily 25C high around 27C minimum around 21C
- https://weathermondo.com/greece/rhodes/september | It’s warm in September in Rhodes with average temperature 29C
- https://www.greekisland.co.uk/crete-september/ | Crete average around 24 degrees September mild evenings plenty sunshine
- https://www.citizendailypost.com/can-you-swim-in-greece-in-september-and-october/ | September Aegean and Ionian seas retain heat 24C to 25C warm water southern islands like Crete Rhodes and Santorini enjoy longer summer
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Last Updated on September 9, 2026 by admin