Best months and seasons to dive the Derawan Islands

Introduction to the Derawan Islands

The Derawan Islands, located in East Kalimantan, Indonesia, are renowned for their rich marine biodiversity. This archipelago comprises several islands, including Maratua, Kakaban, and Sangalaki, each offering unique diving experiences. The area is famous for its manta rays, sea turtles, and vibrant coral reefs, making it a prime destination for divers.

Understanding the Seasons

Diving conditions in the Derawan Islands vary throughout the year, influenced by seasonal weather patterns. The region experiences a tropical climate, characterized by a wet season and a dry season. Understanding these seasons is crucial for planning your diving trip.

Dry Season: April to November

The dry season is the best time to dive in the Derawan Islands. From April to November, you can expect stable weather, reduced rainfall, and optimal diving conditions.

• April to May: The transition from the wet to dry season, with increasing water temperatures and improving visibility.
• June to August: Peak diving months with excellent visibility (up to 30 meters) and a high likelihood of encountering mantas and turtles.
• September to November: The tail end of the dry season, still offers great conditions, although visibility may start to decrease as the wet season approaches.

Wet Season: December to March

The wet season in the Derawan Islands lasts from December to March. This period is characterized by increased rainfall and strong winds, which can lead to reduced visibility and challenging diving conditions.

• December: Heavy rains begin, leading to turbulent seas and decreased visibility.
• January to February: Generally the wettest months, with many dive sites experiencing poor conditions.
• March: Transition month with fluctuating weather; conditions may improve towards the end of the month.

Best Months for Diving in the Derawan Islands

While diving is possible year-round in the Derawan Islands, certain months stand out for their optimal conditions.

May to October: The Peak Diving Season

May to October is when the Derawan Islands truly shine. During these months, divers can expect:

• High Marine Activity: Manta rays and turtles are frequently spotted, particularly in areas like Sangalaki.
• Excellent Visibility: Water clarity often exceeds 30 meters, making it ideal for exploring coral reefs and marine life.
• Stable Weather: Consistent weather patterns make for comfortable diving experiences.

Specific Highlights by Month

Each month during the peak season offers its own highlights:

• May: The water temperature rises, and visibility improves; this month marks the beginning of the best diving conditions.
• June: One of the best months for diving, with abundant marine life and calm seas.
• July: Great visibility continues, and divers frequently encounter pelagic species.
• August: Often considered the peak month for manta ray sightings.
• September: Still excellent for diving, though some rains may begin to occur.
• October: Last month of the peak season; conditions remain good but start to decline towards the end.

Diving Conditions Throughout the Year

Understanding the general conditions throughout the year can help you plan your dive trip more effectively.

Water Temperature

Water temperatures in the Derawan Islands range from 26°C to 30°C (79°F to 86°F) throughout the year. The warm waters are suitable for divers without the need for heavy wetsuits, typically allowing for 3mm or even shorty suits.

Visibility

Visibility can vary significantly based on the season. The dry season typically offers clear waters, with visibility reaching up to 30 meters. In contrast, the wet season can see visibility drop to as low as 5 meters due to runoff and increased plankton blooms.

Marine Life

The Derawan Islands are home to diverse marine life, including:

• Manta rays: Best spotted from May to October.
• Sea turtles: Common year-round but more visible during the dry season.
• Coral reefs: Vibrant and healthy, providing habitats for various fish species.

Liveaboard Diving in the Derawan Islands

Opting for a liveaboard dive cruise is one of the best ways to experience the Derawan Islands. Liveaboards offer:

• Convenience: Access to remote dive sites that are not reachable by day boats.
• Comprehensive Dive Programs: Most liveaboards provide multiple dives per day, maximizing your underwater experience.
• Comfortable Accommodations: Cabins that cater to various budgets, with prices starting around USD 1,200 per week.

For more detailed information on liveaboard options, visit our Derawan liveaboard page.

Conclusion

The best time to dive the Derawan Islands is undoubtedly during the dry season from April to November, with peak diving conditions from May to October. By planning your trip during these months, you ensure the best visibility, optimal water temperatures, and a chance to encounter the diverse marine life that attracts divers from around the globe. Whether you are a seasoned diver or a beginner, the Derawan Islands offer an singular underwater experience.