Plizio Visual Lab

Port Olry Marine Reserve

Plizio editorial teamUpdated: Jun 2026Data Sources

wildlife

Weather…

The Port Olry Marine Reserve in northern Espiritu Santo is one of Vanuatu’s most biodiverse coastal regions. It encompasses a mosaic of coral reefs, small islets like Thion, and extensive seagrass meadows that provide a sheltered habitat for countless marine species. Ecologically, the reserve is vital for sea turtle nesting and the conservation of rare mollusk species, including the giant clam (Tridacna). Historically, the area has been managed by the French-speaking Catholic community of Port Olry, which has practiced sustainable fishing for generations. The implementation of formal conservation regulations has led to fish populations within the reserve significantly exceeding regional averages. The crystalline waters and limestone-white sands offer well-suited conditions for studying reef ecology with minimal human interference. Local initiatives aimed at waste reduction and seagrass protection are critical for safeguarding the dugongs that frequently visit the bay. Today, Port Olry stands as a model for integrating traditional livelihoods with modern marine conservation efforts.

Location: Vanuatu
Top sights: Église Sainte-Anne · chapel dans banian

Best time to visit & climate

The most pleasant time to visit is Jul–Sep.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg °C	27	27	27	27	26	26	25	25	25	26	26	27
Rain mm	291	292	288	291	204	182	134	122	123	181	211	197

📋 Practical info

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Best season

Port Olry Marine Reserve is accessible year-round, but the months from May to October offer the best visibility. During this time the water is calmer and the coral reefs are most colorful.

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Best time of day

Early morning hours are convenient to watch fish feeding when they are most active. Late afternoon also sees many species emerging to seek shelter in the corals.

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Etiquette

Do not drop anchor in the coral reefs to avoid damage. Collecting corals or shells is strictly forbidden.

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What to bring

Snorkeling gear is essential as the best parts of the reef are only visible from the water. Bring an underwater camera to capture the colorful fish.

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Getting there

Port Olry lies on the northeast coast of Espiritu Santo and is easily reachable by car on a paved road from Luganville. Boats to the reefs depart from there.

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What to expect

The fish are used to snorkelers, but some species are shyer. Stay calm and avoid fast movements to get close to them.