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Rat Island Quarantine Station

Plizio editorial teamUpdated: Jun 2026Data Sources

ruins

Rat Island Quarantine Station (St. Lucia)

Weather…

Rat Island is a small islet located in Choc Bay off the northwest coast of Saint Lucia, positioned strategically between Castries and Gros Islet. During the 19th century, the island served a vital yet somber function as a quarantine station for maritime travelers. To prevent the spread of devastating epidemics like yellow fever and smallpox to the main island, incoming passengers showing symptoms were isolated here for observation and treatment. For a time, it also functioned as a leper colony, further emphasizing its role as a place of exclusion and medical necessity. Today, the island is dotted with the atmospheric ruins of former hospital wards and living quarters, now being reclaimed by tropical flora. After the quarantine period ended, the site was briefly transformed into a recreational retreat for senior government officials before falling into disuse. Rat Island remains a significant site for understanding the Caribbean's public health history and the challenges faced during the colonial era. Visitors can see the weathered stone foundations that speak to a past of isolation, offering a quiet, historical counterpoint to the nearby bustling tourist corridors.

Location: St. Lucia
Top sights: Vigie Beach · Saint Mary's College (Saint Lucia) · Vigie
Nearby: Bexon (4 km)

Best time to visit & climate

The most pleasant time to visit is Jan–Mar.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg °C	26	26	26	27	28	28	28	28	29	28	28	27
Rain mm	68	44	48	97	102	136	154	180	182	189	159	85

📋 Practical info

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Visiting

Rat Island is a small islet with ruins of the quarantine station. Access is generally restricted as the island is not developed for tourism - viewing from boats is typical.

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Typical hours

There are no public opening hours; the island is not officially open. Any landing requires special permission from local authorities.

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Photography

Photograph the ruins from a boat or from the mainland with binoculars. A zoom lens helps capture the decaying structures.

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Time needed

A boat pass-by takes 10 to 15 minutes. If you can land, allow 30 minutes to explore the main buildings.

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Combine with

Combine with a boat tour of Castries harbor or a trip to other small islands. The nearby Vigie Lighthouse is another historic landmark.

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Getting there

Accessible only by private or chartered boat, departing from Castries or Gros Islet. Local tour operators sometimes include it in island-hopping itineraries.

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Insider tip

Bring binoculars to see details of the ruins from a distance - landing may not be possible. Ask the Saint Lucia National Trust about guided visits.

Geography

Coordinates

14.03250, -60.98950

Facts

Construction of the first quarantine buildings in the 1800s
Used to combat smallpox and yellow fever outbreaks
Strategic location near the Castries Harbour entrance
Decommissioning of the medical station around 1900
Later served as a recreational site for colonial officers
Remnants of stone walls and foundations remain visible

Explore nearby

Notable places around

Vide Bouteille<1 km · NExplore →

SLASPA Administrative Building1 km · SWExplore →

Entrepot2 km · NWExplore →

Sunny Acres2 km · NExplore →

Eudovic Art Studio2 km · WExplore →

Vigie Lighthouse2 km · SExplore →

Cul de Sac Bridge3 km · SWExplore →

Union Nature Trail4 km · NExplore →

Route planner — Car & Motorhome

Where do you start? We build the route here, with stops and country notes along the way.

Start Destination Via (optional)

Overnight stops

Vehicle

Only stops with (optional): 💧 Water ♻️ Disposal 🔌 Power 🚻 Toilets 🚿 Shower

Sights in the town Rat Island Quarantine Station (3)

Vigie Beach📍 landmark

Vigie Beach is a beach on the northwest coast of Saint Lucia. The sandy beach is located near the capital Castries.

Saint Mary's College (Saint Lucia)📍 landmark

Saint Mary's College is a secondary school in Castries. The educational institution was founded in the 20th century.

Vigie📍 landmark

Vigie is a district of Castries on Saint Lucia. The area includes a hill and a beach.

Sights nearby

Frequently asked questions

What was the function of Rat Island?

It served as a quarantine station for immigrants and the sick during the 19th and early 20th centuries.

Can you visit the island today?

Access is restricted; however, it can be clearly seen during a boat tour from Castries.

Where did the island get its name?

The name likely comes from the island's shape or the former presence of rodents.

Are there still buildings on the island?

There are dilapidated ruins of the old quarantine buildings being reclaimed by nature.

Who owns the island today?

It is government-owned and sometimes used for research purposes or scout camps.

Rat Island Quarantine Station: where is it located?

Rat Island Quarantine Station is located in St. Lucia.

Rat Island Quarantine Station: what is there to see?

Highlights include Vigie Beach, Saint Mary's College (Saint Lucia), Vigie.

Rat Island Quarantine Station: when is the best time to visit?

The most pleasant time to visit is Jan, Mar.

Rat Island Quarantine Station: why is it worth visiting?

Rat Island is a small islet located in Choc Bay off the northwest coast of Saint Lucia, positioned strategically between Castries and Gros Islet.

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