At the edge of the beach, giant tortoises graze under the shade of palm trees.
Prison Island is a small island just a 15-minute boat ride from Stone Town, known for its giant Aldabra tortoises and tranquil beaches. Visitors come to enjoy snorkeling, relax on the sandy shores, and explore the remnants of an old quarantine station. With a population of around 10 residents, this peaceful spot offers a perfect half-day escape from the bustling city. The calm waters and vibrant marine life make it a popular destination for those seeking relaxation and adventure.
In Prison Island, snorkel among colorful reefs, visit the giant tortoises, and explore the historic quarantine station.
Key takeaways
- Snorkeling trips start at ~$15 per person, 2026.
- Visit the giant tortoise sanctuary, home to over 100 tortoises.
- Take a 15-minute boat ride from Stone Town.
- Explore the old quarantine station built in 1893.
- Enjoy calm beaches ideal for swimming and relaxing.
Why visit Prison Island
Prison Island stands out from Zanzibar and Pemba with its unique colony of giant Aldabra tortoises and tranquil beaches. The island’s history as a quarantine station adds a layer of intrigue, making it more than just a beach stop. Enjoy calm waters perfect for snorkeling and relaxing under the sun, away from the busier tourist spots.
- Home to over 100 giant Aldabra tortoises, some over 100 years old.
- Explore the ruins of the old quarantine station, offering a glimpse into the island’s past.
- Visit in the early morning for fewer crowds and better snorkeling visibility.
- The beaches are less crowded than those on Zanzibar, providing a peaceful retreat.
Best for
This destination suits solo travelers seeking a relaxed day trip and beach lovers wanting to unwind in a serene setting. It’s ideal for those who appreciate nature and history without the nightlife scene.
Skip if
Skip Prison Island if you’re looking for vibrant nightlife or extensive dining options; head to Zanzibar for a livelier atmosphere.
Top things to do in Prison Island
Prison Island offers a blend of relaxation and unique wildlife encounters, making it an ideal spot for a half-day escape. Start with the giant tortoise sanctuary, where you can meet these remarkable creatures up close.
1. Giant Tortoise Sanctuary ·
Get up close with Aldabra tortoises, some over a century old, in their natural habitat.
At the sanctuary, you can walk among the giant tortoises, feeding them and learning about their conservation. The experience is both educational and heartwarming, as these gentle giants roam freely in a lush environment. One of the licensed guide outfits in town can provide insights into their history and care.
This sanctuary is the main draw of Prison Island, offering a unique opportunity to interact with these iconic animals, unlike any other attraction on the island.
- When: Visit in the morning, around 9:00 AM, when the tortoises are most active and the weather is cooler.
- Cost: ~$5, 2026
- Duration: 1 hour
- How to reach: Take a short boat ride from the main port in Stone Town, which takes about 30 minutes.
2. Snorkeling at the Coral Reefs ·
Explore vibrant coral reefs teeming with marine life just off the island’s shores.
Grab your snorkeling gear and dive into the crystal-clear waters surrounding Prison Island. The reefs are home to colorful fish and other marine creatures, making it a perfect spot for both beginners and experienced snorkelers. Local operators offer gear rentals and guided tours to the best spots.
The snorkeling here is exceptional, providing a chance to see marine biodiversity that rivals more famous dive sites, all without the crowds.
- When: Aim for midday when the sun is high for the best visibility underwater, especially from June to October.
- Cost: ~$15, 2026
- Duration: 2-3 hours
- How to reach: Snorkeling spots are easily accessible by a short swim from the beach or via a guided boat trip from the sanctuary.
Insider tip: If closed
If snorkeling is not possible due to weather, relax on the beach with a good book.
3. Beach Relaxation ·
Unwind on the serene beaches with soft sand and gentle waves.
The beaches on Prison Island are perfect for lounging and soaking up the sun. Enjoy the tranquility as you sip a cold drink from a nearby vendor or take a leisurely stroll along the shore. The calm waters are ideal for a refreshing dip.
While the island is known for its tortoises, the peaceful beaches provide a perfect contrast for relaxation after your wildlife encounters.
- When: Visit in the late afternoon for a stunning sunset view, especially from May to September.
- Cost: Free
- Duration: As long as you like
- How to reach: The beaches are a short walk from the boat landing area, easily accessible once you arrive on the island.
Solo female travel: The beach area is generally safe and frequented by other travelers, making it a comfortable spot for solo visitors.
4. Historical Quarantine Station ·
Discover the history of the island at the old quarantine station.
Explore the remnants of the quarantine station that once served as a holding area for those with infectious diseases. The site offers a glimpse into the island’s past and features several old buildings and informative plaques. A local guide can provide context and stories about its historical significance.
This site adds a layer of historical intrigue to your visit, contrasting the natural beauty of the island with its past.
- When: Visit in the morning or late afternoon to avoid the heat and enjoy a quieter experience.
- Cost: Free
- Duration: 1 hour
- How to reach: The station is a short walk from the tortoise sanctuary, making it easy to include in your visit.
5. Sunset Viewing ·
End your day with a breathtaking sunset over the Indian Ocean.
Find a cozy spot on the beach or near the old quarantine station to watch the sun dip below the horizon. The colors reflecting off the water create a stunning backdrop for relaxation and reflection after a day of exploration.
While sunsets are common, the serene setting of Prison Island makes this a memorable way to conclude your visit.
- When: Arrive at least 30 minutes before sunset, which occurs around 6:30 PM from June to August.
- Cost: Free
- Duration: 1 hour
- How to reach: Simply walk to any beach area from the main attractions; it’s all within easy reach.
Book tours and tickets
Booking through these links supports Pack Lightly at no extra cost to you.
24 hours in Prison Island
This itinerary suits those seeking a relaxed day filled with nature and local charm, perfect for solo travelers or friends looking to unwind.
Morning
Start your day with a coffee at a local café near the harbor around 8:00 AM. Enjoy the morning light as you sip your drink and watch the fishermen prepare for their day. Afterward, take a leisurely stroll along the beach, soaking in the calm atmosphere before the crowds arrive.
Afternoon
By noon, hop on a boat to visit the giant tortoise sanctuary. Spend a couple of hours exploring the island, interacting with the tortoises, and learning about their conservation. For lunch, enjoy fresh seafood at one of the small eateries near the beach, where you can savor grilled fish while listening to the gentle waves.
Evening
As the sun begins to set around 6:30 PM, find a spot on the beach to watch the colors change in the sky. Afterward, head to a nearby restaurant for a casual dinner featuring local dishes, where you can unwind and reflect on your day.
If you have a second day
Consider taking a snorkeling trip to explore the vibrant coral reefs surrounding the island. Alternatively, spend more time relaxing on the beach or visiting the old quarantine station for a glimpse into the island’s history.
Best time to visit Prison Island
Quick answer
Visit from April to June and October to early December for the best weather and fewer crowds.
| Months to go | April to June, October to early December |
|---|---|
| Months to avoid | January to March due to heavy rainfall and humidity. |
The dry months from April to June offer warm temperatures averaging 80°F / 27°C, perfect for beach lounging and snorkeling. October to early December sees similar conditions, ideal for exploring the island and its giant tortoises. January to March brings increased rainfall and humidity, which can limit outdoor activities and make the beaches less enjoyable. During the rainy season, visibility for snorkeling can also decrease, impacting the experience.
Average temperature (°F)
Monthly weather
humid wet, off-peak prices
humid wet, off-peak prices
humid wet, off-peak prices
warm dry, fewer crowds
warm dry, fewer crowds
cool dry, best weather
cool dry, best weather
cool dry, best weather
warm dry, fewer crowds
warm dry, fewer crowds
warm dry, fewer crowds
warm wet, holiday crowds
How to get to Prison Island
Nearest airport
Abeid Amani Karume International Airport (ZNZ), 6 miles / 10 km from Stone Town
From the airport
Take a taxi or shuttle from the airport to Stone Town’s main harbor for around $10-$15, 2026. From there, book a boat with a local operator at the harbor for about $10-$15 round trip; this is the fastest and most reliable way to reach Prison Island.
Other ways to arrive
- Stone Town, Zanzibar: boat, 20 minutes, ~$10-$15 round trip, 2026
- Nungwi, Zanzibar: taxi to Stone Town plus boat, 1.5 hours total, ~$40-$50, 2026
- Dar es Salaam, Tanzania: ferry to Zanzibar plus boat to Prison Island, full day, ~$60-$80, 2026
Getting around Prison Island
The island is small and walkable, making foot travel the only practical way to get around. Walking lets you explore beaches, the tortoise sanctuary, and snorkeling spots at your own pace.
- Walking: the default and best option to cover the island’s paths and beaches, free.
- Boat: only needed if arranging private snorkeling trips around the island, roughly $20-$30 per hour, 2026.
Avoid
Avoid renting motorized vehicles; the island has no roads suitable for cars or scooters.
Day trips from Prison Island
These day trips complement a Prison Island visit by expanding your Zanzibar coastal experience beyond the quiet island.
Stone Town, Zanzibar
Exploring historic architecture, markets, and local food scenes.
Why: Stone Town offers a lively contrast to Prison Island’s calm, with rich Swahili heritage and bustling streets just a short boat ride away.
Skip if: Skip if you want a purely beach-focused, low-key day.
Nakupenda Beach, Zanzibar
Relaxing on a white sand beach with shallow turquoise water perfect for wading.
Why: Nakupenda’s shallow lagoon and soft sand provide a more expansive beach day option than Prison Island’s smaller coves.
Skip if: Skip if you prefer snorkeling and tortoise viewing over beach lounging.
Mnemba Atoll, Zanzibar
Snorkeling vibrant coral reefs and spotting tropical fish.
Why: Mnemba Atoll’s reef is healthier and more colorful than Prison Island’s, ideal for a snorkeling upgrade.
Skip if: Skip if you want a relaxed day without a boat trip longer than 30 minutes.
Combine Prison Island with
Prison Island fits neatly into a Zanzibar-centered itinerary focused on beach calm, local wildlife, and coastal culture.
4-day Zanzibar coastal loop Stone Town → Prison Island → Nakupenda Beach → Nungwi
Start with Stone Town’s culture, unwind with tortoises and snorkeling on Prison Island, then relax on Nakupenda’s beach before heading north to Nungwi for more beach time and sunset views.
7-day Zanzibar and mainland Tanzania Dar es Salaam → Stone Town → Prison Island → Jozani Forest
Fly into Dar es Salaam, ferry to Stone Town for urban exploration, take a half-day to Prison Island for slow beach and tortoise time, then visit Jozani Forest for a nature walk before heading back.
Where to stay in Prison Island
Compare prices across booking sites on the map below and see which neighbourhood fits your plans.
Accommodations on Prison Island are limited but cozy, primarily focused around the beach area for easy access to snorkeling and relaxation. Travelers often choose spots near the main beach for convenience or quieter locations further from the hustle.
Mid-range – Main Beach area
Stay in family-run guesthouses or beach cabanas that offer a comfortable atmosphere and local charm, but expect basic amenities. These options provide a great balance of affordability and access to the island’s attractions.
Insider tip: Request a room with a sea view for a more enjoyable stay.
Solo female travelers
Opt for a guesthouse near the Main Beach area, where the atmosphere is friendly and well-lit at night.
Book your stay
Booking through these links supports Pack Lightly at no extra cost to you.
Where to eat and drink in Prison Island
Prison Island’s culinary scene is heavily influenced by its coastal location, featuring fresh seafood and local spices. The island’s proximity to the Indian Ocean means dishes often highlight regional fish and traditional Swahili cooking techniques.
Must-try dishes
Samaki wa Kupaka (Grilled Fish)
Freshly caught fish marinated in coconut milk and spices, then grilled to perfection.
Insider tip: Order it with a side of ugali for a filling meal; it’s best enjoyed fresh off the grill.
Urojo (Zanzibar Mix)
A flavorful soup made with a mix of meats, potatoes, and spices, topped with a tangy sauce.
Insider tip: Visit during lunchtime for the freshest servings; it’s a local favorite.
Biryani ya Samaki (Fish Biryani)
A fragrant rice dish cooked with spices and layers of fish, often garnished with fried onions.
Insider tip: Pair it with a refreshing mango lassi for a complete meal.
Local drinks
- Kilimanjaro BeerAny local bar or beachside restaurant.
A popular Tanzanian lager known for its crisp taste and refreshing qualities. - Tanzania CoffeeCafes near the main plaza.
Rich and aromatic coffee grown in the highlands of Tanzania, often served black or with milk.
How to eat like a local in Prison Island
Lunch is the main meal of the day, so plan to enjoy your biggest meal around 1:00 PM. Many local kitchens close in the afternoon and reopen as bars in the evening.
Daily budget for Prison Island
Prison Island’s costs are slightly inflated due to its popularity as a tourist destination, but it remains affordable compared to mainland Tanzania. Expect to pay more for activities and transport, especially during peak seasons.
Shoestring
- lodging – dorm bed in a local guesthouse
- food – simple meals at local cafes
- transport – shared boat to the island
- activities – self-guided exploration
- buffer – miscellaneous expenses
Trade-offs: You may miss out on guided tours and premium dining options.
Comfort
- lodging – private room in a guesthouse
- food – meals at mid-range restaurants
- transport – private boat transfer
- activities – guided snorkeling tour
- buffer – miscellaneous expenses
Trade-offs: You give up some flexibility in dining and activities.
Splurge
- lodging – upscale beachfront bungalow
- food – fine dining experiences
- transport – private transfers
- activities – exclusive guided tours
- buffer – miscellaneous expenses
Trade-offs: You may not experience the local vibe as deeply.
Money-saver tip
Book your boat transfer directly with local operators instead of through hotels to save around $10.
Splurge that’s worth it
Consider a guided snorkeling tour to see the giant tortoises and vibrant marine life, which offers a richer experience.
Skip to save
Avoid overpriced meals at tourist-centric restaurants near the dock; local eateries offer better food at lower prices.
Practical tips for Prison Island
Money
| Cash or card | Cash is preferred on Prison Island, as many places do not accept cards. |
|---|---|
| ATMs | There are no ATMs on Prison Island; bring enough cash for your visit. |
| Tipping | Tip around 10% for good service, especially in restaurants. |
Safety
Prison Island is generally safe for tourists, but it’s wise to stay aware of your surroundings.
Local warnings:
- Be cautious of sandflies, especially in the early morning and late afternoon.
Connectivity
| Mobile data | Mobile data coverage is decent; consider getting a local SIM from Vodacom or Airtel for better connectivity. |
|---|---|
| Wi-Fi | Wi-Fi is limited; some accommodations may offer it, but expect slow speeds. |
Language
| Main language | Swahili |
|---|---|
| English level | English is spoken in tourist areas, but proficiency may vary among locals. |
Solo female travel
Solo female travelers generally find Prison Island welcoming and safe, but it’s best to dress modestly.
Frequently asked questions about Prison Island
1Is Prison Island worth visiting?
Yes – it’s a unique spot to see giant tortoises and enjoy calm beaches. The short boat ride from Stone Town makes it an easy half-day trip.
2How do you get to Prison Island from Stone Town?
Take a boat from the Stone Town harbor, with multiple departures daily. The ride takes about 30 minutes and costs around $15, 2026.
3Can you swim in the waters around Prison Island?
Yes – the waters are generally calm and suitable for swimming. The beaches offer a relaxing spot to enjoy the sun and the sea.
4Is Prison Island safe for solo female travelers?
Yes – the island is generally safe, and many solo female travelers visit without issues. Stick to well-populated areas and avoid wandering alone at night.
5What does a day in Prison Island cost?
Roughly $50-70/day at a comfortable level. Expect around $15 for the boat ride, $20 for meals, and additional costs for activities like snorkeling.
6When is the best time to visit Prison Island for snorkeling?
Visit between June and October for the best snorkeling conditions. The waters are clearer and calmer during these months.
Estimate your daily budget
See realistic daily costs by tier and category.