As seasoned experts at GoSmart Zanzibar Tours, with over a decade of guiding thousands of travelers through Zanzibar’s hidden gems, we’ve crafted this comprehensive guide based on firsthand experience and reliable sources to help you plan an unforgettable visit to Prison Island (Changuu Island).
This enchanting spot, just off Stone Town, blends haunting history, vibrant wildlife, and serene beaches into a perfect half-day escape. Whether you’re a history buff, nature lover, or beach enthusiast, our insights—drawn from daily tours and guest feedback—ensure you make the most of it.
For the easiest, safest way to experience it all, consider booking with us; we handle everything from boat transfers to expert narration, starting at just $60 per person.
The Rich History of Prison Island
Prison Island’s story is as captivating as its landscapes, earning it a spot on many travelers’ must-see lists. Originally uninhabited and known as Changuu Island, it was gifted in the 1860s by Zanzibar’s first Sultan, Majid bin Said, to two Arab slave owners who used it as a detention center for rebellious slaves.
In 1893, under British administration led by First Minister Lloyd Mathews, a prison complex was built for violent criminals, but it was never used for that purpose.
Instead, the island served as a quarantine station for yellow fever outbreaks, also earning nicknames like Kibandiko or Quarantine Island.
Today, the evocative ruins stand as silent witnesses to this layered past, offering a poignant glimpse into Zanzibar’s colonial and slave trade era. Our guides, locals with deep knowledge of Tanzanian history, bring these tales to life—far beyond what you’d get exploring solo.
How to Get to Prison Island
Conveniently located in the Zanzibar Archipelago’s Mjini Magharibi Region, Prison Island sits about 5.6 km (3.5 miles) northwest of Stone Town on Unguja Island, making it an accessible day trip.
The most straightforward way is by boat from Stone Town’s harbor or beach, a scenic 25-30 minute ride on a motorized dhow or speedboat.
Boats depart frequently from spots like Forodhani Gardens pier, with return fares typically $30-40, though prices can vary by operator.
For solo travelers or those wary of haggling, joining an organized tour avoids the hassle—our GoSmart packages include comfortable, well-maintained boats with safety gear and refreshments.
If you’re flying into Zanzibar, we can even arrange pickups from your hotel or the airport for seamless integration into your itinerary.
The best time? Dry season (June-October) for calm seas, but we operate year-round with weather checks for your safety.
What to See and Do on Prison Island
Once you arrive on this compact 800m x 230m island, you’ll find a treasure trove of attractions that showcase its natural and historical allure.
Start with the star residents: the Aldabra giant tortoises, introduced in 1919 as a gift from the Seychelles Governor, now numbering over 100 with some over 150 years old and weighing 200kg.
Interact gently, feed them greens (provided on our tours), and learn about conservation efforts—it’s an experience our guests rave about.
Explore the haunting prison ruins and old quarantine hospital, remnants of its 19th-century past, offering photo ops and historical insights.
Don’t miss the pristine white-sand beaches for swimming or snorkeling in crystal-clear waters teeming with marine life, or spot peacocks and exotic birds amid lush greenery.
With our expert-led tours, you’ll uncover hidden spots like lesser-known viewpoints, ensuring a richer visit than going it alone.
The Best Time to Visit Prison Island, Zanzibar
The best time to visit Prison Island aligns with Zanzibar’s dry seasons, when reliable weather enhances every aspect of the tour, from the 30-minute boat journey to beach relaxation.
Aim for June to October (the cool dry season), where temperatures hover between 24-28°C (75-82°F) with low humidity, minimal rainfall, and gentle breezes—ideal for exploring ruins, snorkeling in clear waters, and interacting with the giant tortoises without the heat overwhelming you.
This period sees calm seas, making the boat ride from Stone Town smooth and scenic, with higher chances of spotting marine life en route.
Alternatively, December to February offers a hot dry season with temperatures up to 32°C (90°F), perfect for beach lovers seeking warmth and vibrant underwater visibility for snorkeling. It’s a festive time with holiday vibes, but expect more crowds—our early bookings secure the best slots.
| Season | Months | Average Temperature | Weather Highlights | Pros | Cons | Recommended for… |
|---|---|---|---|---|---|---|
| Cool Dry Season | June – October | 24-28°C (75-82°F) | Sunny, low humidity, minimal rain | Calm seas for boat rides; Ideal for outdoor activities like tortoise interactions and hiking ruins; Fewer mosquitoes | Can feel cooler in evenings; Peak tourist season in July-August | History buffs, families, and active explorers seeking comfortable weather |
| Hot Dry Season | December – February | 28-32°C (82-90°F) | Hot and sunny, clear skies | Excellent snorkeling visibility; Warm beaches for relaxation; Festive atmosphere | Higher heat and humidity; More crowds during holidays | Beach lovers, snorkelers, and those wanting a vibrant, sunny escape |
| Long Rainy Season | March – May | 25-30°C (77-86°F) | Heavy rains, high humidity | Lush greenery; Fewer tourists; Lower prices | Rough seas may disrupt boat trips; Muddy paths on island; Limited outdoor time | Budget travelers okay with indoor alternatives or flexible plans (avoid if possible) |
| Short Rainy Season | November | 26-30°C (79-86°F) | Intermittent showers, humid | Transition to dry weather; Some deals available | Unpredictable rain; Potential for choppy boat rides | Short visits or those combining with indoor Stone Town tours |
Pro Tips from Our Team
- Monitor Forecasts: We check daily weather via trusted local sources and adjust departures for safety—rainy season visits are possible but require flexibility.
- Crowd Avoidance: Early morning tours (our specialty) beat the heat and crowds, especially in high season.
- Sustainability Note: Visiting during dry times supports tortoise conservation by minimizing erosion on the island’s paths.
- Health Prep: Dry seasons reduce mosquito risks, but always pack repellent—our guides provide on-tour essentials.
Trust GoSmart Zanzibar Tours for authoritative planning:
We’re licensed by the Zanzibar Commission for Tourism and boast 5-star reviews from over 5,000 guests on platforms like TripAdvisor.
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Essential Packing Tips for Your Visit
Based on our extensive experience running tours in Zanzibar’s tropical climate, packing smartly enhances your comfort.
Essentials include sunscreen (SPF 50+), a wide-brimmed hat, and sunglasses to combat the intense sun—temperatures often hit 30°C (86°F).
Wear comfortable walking shoes for exploring ruins and trails, lightweight clothing that covers shoulders and knees (respecting local customs), and swimwear with a towel for beach time.
Bring a reusable water bottle (we provide refills), insect repellent, a power bank for your camera/phone, and seasickness tablets if prone to motion on boats.
Experience the Prison Island
At GoSmart Zanzibar Tours, we’re trusted by travelers worldwide for our authoritative knowledge and commitment to sustainable, authentic experiences—backed by partnerships with local conservation groups.
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