Best time to cruise · Good time to go

Greek Isles cruises in August

The Dormition of the Virgin on August 15 is Greece’s great summer holiday, when Greeks flood the islands and pilgrims crowd Tinos. Ferries, beaches and tavernas are packed and fares peak. The sea is at its warmest, around 77°F (25°C), and the meltemi is at its strongest, so pack seasickness remedies if you’re prone.

Good time to go
Avg high 88°F
14 hrs daylight

Photo: dronepicr, CC BY 2.0, via Wikimedia Commons

Greek Isles in August: Good time to go

Across Greek Isles cruise ports, August brings average highs around 88°F (31°C) and lows near 77°F, with about 0.4 inches of rain over the month and roughly 14 hours of daylight.

Verdict: Good time to go
Season: April to early November; best late May–June and September
Average high / low: 88°F / 77°F
Rainfall (month): 0.4 in
Daylight: About 14 hours
Typical cruise length: 3 to 7 nights from Piraeus; 7 to 12 nights on wider Eastern Med routes

What to pack: light, breathable clothes, swimwear, a sun hat, sunglasses and reef-safe sunscreen, plus a light layer for air-conditioned rooms.

How August compares with the rest of the year

No regular sailings
Shoulder season
Good time to go
Best time to go

Greek Isles in July Greek Isles in September

Greek Isles weather in August

Average monthly weather in Greek Isles cruise ports
Month	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
High °F (°C)	5814	5915	6216	6720	7423	8228	8731	8831	8328	7624	6820	6216
Low °F (°C)	5111	5211	5312	5814	6418	7222	7625	7725	7323	6719	6116	5513
Rain in (mm)	4.4112	2.564	2.564	1.026	0.923	0.821	0.39	0.411	1.436	1.948	3.486	3.897
Daylight (hrs)	10	11	12	13	14	15	15	14	12	11	10	10

Average daily highs and lows and monthly rainfall for 2015–2024 from NASA POWER for the area around Greek Isles cruise ports, adjusted to sea level; daylight is calculated for mid-month. Real weather on any given day varies.

August weather port by port

Port	Avg high	Avg low	Rain	Daylight
Athens	92°F	76°F	0.5 in	14 h
Santorini	81°F	77°F	0.2 in	14 h
Mykonos	78°F	76°F	0.2 in	14 h
Rhodes	87°F	80°F	0.2 in	14 h
Heraklion, Crete	84°F	78°F	0.3 in	14 h
Chania (Souda Bay), Crete	88°F	78°F	0.3 in	14 h
Corfu	88°F	78°F	0.9 in	14 h
Kuşadası (for Ephesus)	103°F	75°F	0.2 in	14 h
Patmos	81°F	76°F	0.1 in	14 h
Nafplio	97°F	75°F	0.6 in	14 h
Katakolon (for Olympia)	85°F	80°F	0.6 in	14 h
Argostoli, Kefalonia	86°F	80°F	0.9 in	14 h

Average daily highs and lows, 2015–2024, from NASA POWER, adjusted to sea level. Rain is the average monthly total.

Other great cruise destinations in August

See every destination for August, with a port weather map →

Greek Isles in August: FAQs

Is August a good time to cruise Greek Isles?

Yes, it's a good month. The Dormition of the Virgin on August 15 is Greece’s great summer holiday, when Greeks flood the islands and pilgrims crowd Tinos. Ferries, beaches and tavernas are packed and fares peak. The sea is at its warmest, around 77°F (25°C), and the meltemi is at its strongest, so pack seasickness remedies if you’re prone.

What is the weather like on a Greek Isles cruise in August?

Across Greek Isles cruise ports, August brings average highs around 88°F (31°C) and lows near 77°F, with about 0.4 inches of rain over the month and roughly 14 hours of daylight. Conditions vary from port to port and day to day.

What should I pack for a Greek Isles cruise in August?

Pack light, breathable clothes, swimwear, a sun hat, sunglasses and reef-safe sunscreen, plus a light layer for air-conditioned rooms. Check your cruise line's dress code for evenings.

When is the best time to cruise Greek Isles?

April to early November; best late May–June and September. The best months are usually May, June, September.

Where else can I cruise in August?

August is also a top month for Alaska, Canada & New England, Northern Europe, Norwegian Fjords, Baltic Sea.

Updated November 2026 by the BookMyDreamCruise editorial team. How we research and fact-check.

Sources: NASA POWER climate data.