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George E. Koronaios CC BY-SA 4.0 Wikimedia Commons

Sanctuary of Poseidon at Kalaureia

Archaeological Site

On the island of Kalaureia, the ancient sanctuary of Poseidon preserves Classical-period ruins overlooking the Saronic Gulf; visitors study temple foundations, scattered capitals and coastal archaeology.

Sanctuary of Poseidon at Kalaureia AthensPiraeusElefsinaMegaraMarathon, GreecePeristeriKallitheaLavrioSanctuary of Poseidon at Kalaureia
In this guide

Sanctuary of Poseidon at Kalaureia essentials

Address: Sanctuary of Poseidon at Kalaureia (Poros area), Argosaronic Gulf, Greece
Admission: Site may require boat transfer; archaeological site access fees may apply
Things to Do

Nearby Attractions to Sanctuary of Poseidon at Kalaureia

When to Go

Best Time to Visit Sanctuary of Poseidon at Kalaureia

Late spring through early autumn for reliable boat transfers and comfortable touring.

Summer (Jun-Aug)
Jun-Aug · 22-32°C (72-90°F)
Best sea conditions for boat transfers; high tourist season.
Late Spring (May)
May · 18-25°C (64-77°F)
Pleasant temperatures and fewer crowds; wildflowers on the island.
Early Autumn (Sep)
Sep · 20-28°C (68-82°F)
Sea stays warm and day-trippers thin out after August.

Weather & Climate near Sanctuary of Poseidon at Kalaureia

Climate

Sanctuary of Poseidon at Kalaureia's climate is classified as Hot-Summer Mediterranean - Hot-Summer Mediterranean climate with hot summers (peaking in July) and cold winters (coldest in February). Temperatures range from 7°C to 30°C. Semi-arid with limited rainfall with a pronounced dry season.

Air Quality: AQI 48 Good
Best Time to Visit
JulyAugustJune
Temperature & Rainfall
Temperature Range
39°
Warmest Month
3°
Coldest Month
Monthly Conditions
Month Comfort Temp Feels Rain Sky Humidity Wind UV Daylight
January Good 7° - 13° 7° 61 mm partly cloudy 75% 4.7 m/s 0.3 low 9.8h
February Good 7° - 13° 7° 58 mm partly cloudy 76% 4.8 m/s 0.5 moderate 10.7h
March Good 8° - 14° 11° 54 mm partly cloudy 76% 4.7 m/s 0.9 moderate 11.8h
April Very Good 11° - 18° 15° 32 mm some cloud 75% 4.4 m/s 1.3 high 13.0h
May Ideal 15° - 23° 19° 17 mm some cloud 74% 3.6 m/s 1.8 very high 14.0h
June Ideal 19° - 28° 24° 7 mm clear 70% 3.8 m/s 2.3 extreme 14.5h
July Ideal 22° - 31° 26° 6 mm clear 66% 4.7 m/s 2.4 extreme 14.3h
August Ideal 22° - 30° 26° 8 mm clear 66% 4.5 m/s 2.0 extreme 13.4h
September Ideal 19° - 27° 23° 10 mm mostly sunny 68% 4.3 m/s 1.4 high 12.3h
October Very Good 15° - 22° 18° 50 mm some cloud 72% 4.0 m/s 0.8 moderate 11.1h
November Very Good 11° - 17° 14° 74 mm partly cloudy 74% 4.1 m/s 0.4 low 10.0h
December Acceptable 8° - 14° 11° 79 mm partly cloudy 75% 4.8 m/s 0.3 low 9.5h
Getting There & Around

How to Get to Sanctuary of Poseidon at Kalaureia

Kalaureia (modern Poros area) is reached by ferry or private boat from Galatas or the Peloponnese coast; timetables vary seasonally. From Athens, drive to the port town of Galatas (about 1.5-2 hours) and take a short boat transfer. Boat schedules are often weather-dependent.

Tips for Visiting Sanctuary of Poseidon at Kalaureia

  • Boat access is typical-coordinate schedules from Galatas or nearby ports
  • Bring sun protection and water; shade is limited on the island
  • Combine the visit with exploration of nearby Poros or Epidaurus for a full archaeological circuit