Megalos Gialos
South Aegean, Greece: Excellent water quality
Megalos Gialos is a Blue Flag-certified beach located 6.62 km from Ermoupoli on Syros. The beach is open from July 1 to October 15 and offers free access. It holds the Blue Flag award, which means it meets strict standards for water quality, environmental management,…
Quick Overview
Plan Your Visit to Megalos Gialos
The key facts before you go
About the Beach
What is Megalos Gialos?
Megalos Gialos is a Blue Flag-certified beach located 6.62 km from Ermoupoli on Syros. The beach is open from July 1 to October 15 and offers free access. It holds the Blue Flag award, which means it meets strict standards for water quality, environmental management, and visitor safety.
The best time to visit is April through June, when crowds are lighter. July and August bring peak season visitors. Before swimming, check local water safety conditions.
A kiosk and shop are available on-site. The Blue Flag certification is renewed annually by the Foundation for Environmental Education, making this a solid choice for families and swimmers looking for a well-maintained beach.
It sits alongside other certified beaches in South Aegean, part of a broader network of other Blue Flag beaches in Greece certified annually by the Foundation for Environmental Education.
Sunrise, Sunset & Beach Direction
Megalos Gialos faces south toward Aegean Sea. The best light for photography and swimming is typically in April, May, June. Direct sun hours follow that facing.
Planning
When to Go: Month by Month
| Month | Air Temp | Water Temp | Crowds |
|---|---|---|---|
| Jan | 12°C | 9°C | Low |
| Feb | 13°C | 10°C | Low |
| Mar | 14°C | 11°C | Low |
| Apr | 16°C | 13°C | Low |
| May | 20°C | 17°C | Low |
| Jun | 24°C | 21°C | Low |
| Jul | 26°C | 23°C | Med |
| Aug | 26°C | 23°C | High |
| Sep | 24°C | 21°C | High |
| Oct | 20°C | 17°C | Med |
| Nov | 17°C | 14°C | Low |
| Dec | 14°C | 11°C | Low |
The best time to visit Megalos Gialos is April, May, June. Air temperatures peak around 26.3°C in summer. Peak water temperature reaches 23.3°C in July.
How crowded does Megalos Gialos get?Like most Blue Flag beaches in Greece, Megalos Gialos sees its highest visitor numbers in July and August. The beach maintains a pleasant atmosphere even in peak season.
Is Megalos Gialos open year-round?The beach itself is accessible year-round, though staffed facilities including lifeguards typically operate only during the official season (01-07 – 15-10). The Blue Flag is displayed during the certification period only.
The Water
Swimming and Beach Life at Megalos Gialos
Is Megalos Gialos safe to swim?Megalos Gialos is Blue Flag certified, which requires meeting strict bathing water standards set by the EU Bathing Water Directive. Water quality is rated Excellent. The beach does not have lifeguards stationed on the beach. Swim with appropriate caution.
What is the water temperature at Megalos Gialos?Peak water temperature at Megalos Gialos reaches around 23.3°C in July, making it comfortable for swimming during the summer months. In winter (January), air temperatures average 11.9°C.
What is the beach like at Megalos Gialos?Megalos Gialos is a sandy beach on the South Aegean coast of Greece. The best time to visit is April through June, when crowds are lighter. July and August bring peak season visitors. Before swimming, check local water safety conditions.
Does Megalos Gialos have good facilities?As a Blue Flag certified beach, Megalos Gialos meets the Foundation for Environmental Education's standards for facilities and services. Toilet facilities are on site. Parking is available nearby.
Megalos Gialos sits on the Aegean Sea: explore all Blue Flag beaches on the Aegean.
Planning a trip to Greece? How Greece earns the most Blue Flags , our editorial guide to certified beaches across the country.
Transport
Getting to Megalos Gialos
How do I get to Megalos Gialos by car?Megalos Gialos is approximately 6.62 km from Municipality of Syros and Ermoupoli. Follow local road signs to the beach. Check Google Maps or a local map for the most current directions.
What is the nearest airport to Megalos Gialos?The nearest airport is Athens International Airport "El. Venizelos" (ATH), approximately 102.5 km away.
Can I get to Megalos Gialos by public transport?Public transport options vary by season. Check local transport authority websites for current bus and train schedules connecting to Municipality of Syros and Ermoupoli. The nearest recorded bus stop is 77 m from the beach.
Map
Find Megalos Gialos
Open the map or get directions to the Megalos Gialos pin. Amenity names are listed here only when OpenStreetMap has a mapped feature nearby.
Map loads when you ask. Tiles stay off the first paint.
Map: OpenStreetMap (ODbL)
Practical Details
Practical Information
| At the Beach | |
| Entry | Free: no charge to access the beach |
|---|---|
| Lifeguards | ✗ |
| Disabled Access | ✗ No dedicated disabled access listed |
| Showers | ✗ |
| Toilets | ✓ Available during season |
| Official Season | 01 Jul – 15 Oct |
| Beach Type | Sandy beach |
| Parking | ✓ Available nearby (parking) |
| Nearest supermarket | 3.5 km from the beach |
| Nearest bus stop | 77 m from the beach |
| Visiting Information | |
| GPS Coordinates | 37.3790°N, 24.9092°E |
| Water Quality | Excellent (EU Bathing Water Directive) |
| Blue Flag Operator | Foundation for Environmental Education (FEE), Greece |
Frequently Asked Questions
Megalos Gialos FAQ
Is Megalos Gialos suitable for children?
Megalos Gialos has a child-friendly score of 5/10. Facilities include toilets and parking. It is Blue Flag certified in Greece.
Is Megalos Gialos free to access?
Access to Megalos Gialos is free. There are no entry fees to enter the beach. It is a Blue Flag certified beach in South Aegean, Greece, recognised for meeting international standards for water quality and environmental management.
When is the best time to visit Megalos Gialos?
The best time to visit Megalos Gialos is April, May, June. The peak season typically runs High season: July, August, when weather conditions and facilities are at their best. Peak water temperature reaches around 23.3°C in July. Outside peak season, the beach is quieter but some facilities may be reduced.
What is the water quality at Megalos Gialos?
Megalos Gialos is Blue Flag certified, which requires meeting strict EU Bathing Water Directive standards. Water quality is rated Excellent. Blue Flag certification is awarded and reviewed annually by the Foundation for Environmental Education (FEE). Beaches must pass water quality tests throughout the season to retain their status.
How do I get to Megalos Gialos?
Megalos Gialos is located in South Aegean, Greece. It is approximately 6.62 km from Municipality of Syros and Ermoupoli. The nearest airport is Athens International Airport "El. Venizelos" (ATH), 102.5 km away. By car is the most flexible option. Check local transport authority websites for current bus and train schedules to the area.
Explore More
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Editorial
From the Zeach Blog
Everything you need to know about what makes a beach qualify for Blue Flag status, from water quality to environmental education.
Read moreOur editorial team's pick of the standout Blue Flag beaches in Greece, rated for family friendliness, scenery, and facilities.
Explore GreeceWhat the flag actually means, how certification works, and why a Blue Flag is a genuinely reliable signal, not just a marketing tool.
Read moreSources
- Foundation for Environmental Education: Blue Flag programme
- FEE site listing for Megalos Gialos
- Hellenic Society for the Protection of Nature (EEPF)
- European Environment Agency: bathing water quality
Last verified September 2026. National operator pages and FEE listings are the primary certification sources.