
Diving atLongDong NO.4 (Taiwan, Province of China)
Beginning your descent into LongDong NO.4, divers encounter a transition from easy shore entry to a diverse underwater topography. Recreational depths here typically range from shallow areas down to a maximum of 23-26 m (75-85 ft). This site invites exploration, offering a readily accessible entry point for underwater adventures along Taiwan’s northeastern coast. The immediate surroundings give way to vibrant reefs and sandy patches, setting the stage for the dive.
As evening covers LongDong NO.4, the local air temperature is measured at 21.1°C. The current wave height at the surface is recorded at 1.18m. These late-day readings characterize the surface conditions for the night.
Dive Site Coordinates
25.1130, 121.9191
Dive Site Characteristics
Key Dive Site Facts
Dive Site Overview
The underwater landscape at LongDong NO.4 unfolds with diverse geological features, starting from accessible shore entry points. A blend of reef formations and expansive sandy bottom areas characterizes this site, suitable for various skill levels.
Divers progress from shallow, protected zones into deeper sections, where the terrain expands to include intriguing wall structures and even what's been described as a fjord-like environment. Located within Longdong Bay on the northeastern coast of Taiwan, this site offers a dynamic progression from its accessible entry to its varied depths. It's often considered a versatile location, providing both simpler areas for introductory dives and more complex features for advanced explorations.
Expect to navigate formations that create natural habitats, ensuring visual interest throughout the dive at depths reaching 23-26 m (75-85 ft).
Best Time to Dive
Choosing the optimal time to dive LongDong NO.4 means balancing seasonal variations in both air and water conditions. The months of May, June, August, and September typically present the most favorable dive scores, offering good visibility and calmer seas. During these periods, air temperatures average between 24.5-28.6°C (76-83°F), while water temperatures generally range from 24-29°C (75-84°F). Rainfall during these peak months is moderate, averaging 4.3-8.3 mm. Conversely, winter months, particularly December through February, see cooler conditions; air temperatures drop to 16.4-18.5°C (61-65°F) with water temperatures around 16-19°C (61-66°F). Wave heights also tend to be higher, averaging 2.1-2.4 meters (7-8 feet) in winter, which can limit diving opportunities. Spring (March-May) and autumn (September-November) offer moderate conditions, with improving visibility towards late spring and warmer water temperatures in early autumn, averaging 22-26°C (72-79°F).
Climate Historical Averages
Monthly records compiled from satellite and marine observation nodes over the last 3 years. Data provided by Open-Meteo and MET Norway.
Dive Experience & Conditions
Understanding the current dynamics is key to navigating LongDong NO.4 effectively; conditions can vary, sometimes presenting moderate movements that require attentive finning. Visibility ranges from 10 to 30 m (33 to 100 ft), depending heavily on the season and recent weather patterns. Warmer water temperatures, peaking between 24-29°C (75-84°F) in summer, make for comfortable diving. In contrast, winter conditions see the water cool to 16-19°C (61-66°F), necessitating appropriate thermal protection. Entry to this **ocean** site is primarily shore-based, which usually offers straightforward access but can be influenced by wave action on choppier days. With a maximum depth of 23-26 m (75-85 ft), divers can explore both shallower reefs and deeper transitions, experiencing varied micro-environments within a single dive. The salt water environment supports a diverse ecosystem, adding to the richness of the dive.
Dive Difficulty & Safety Guidelines
Ensuring a safe dive at LongDong NO.4 begins with thorough preparation and awareness of the environment. As a popular shore diving location, it's crucial to assess entry and exit points for wave conditions and stability, particularly on days with higher swell activity. Always dive within your certification limits and with a buddy, maintaining proper buoyancy control to protect the delicate **reef** ecosystems. While no specific hazards are consistently reported, general ocean safety protocols apply, including monitoring air consumption and no-decompression limits. Parking can be challenging during peak summer months, so consider arrival times and alternative transportation options. Staying informed about local weather forecasts and any dive site-specific advisories is essential for a safe and enjoyable experience.
Recommended Equipment
No verified equipment items yet.
Verified equipment recommendations for this dive site are being reviewed and may be added as additional source checks are completed.
Recommended Dive Suit
In these water temperatures, 3mm wetsuit is a common choice for recreational diving. A hood or vest is suggested for sensitive divers due to surface winds. Surface intervals may feel cooler. Longer dive profiles can make thermal protection more important than short exploratory dives.
At the moment, divers exploring LongDong NO.4 will likely experience water temperatures near 25°C (78°F). Surface air temperatures are resting at 21°C (70°F).
Forecast models indicate that diving conditions should remain largely unchanged.
Conditions last reviewed: 18:00 using the latest environmental data.
Dive Logistics & Preparation
Hyperbaric Chamber
Check local Taiwan, Province of China medical facilities.
Entry Requirements
View Taiwan, Province of China Visa Hub
Currency
TWD
Nearest Airports
Nearest airports to help plan travel to this dive area.
Marine Life at LongDong NO.4
A focal point for many divers, the marine life at LongDong NO.4 presents a dynamic underwater spectacle across its diverse habitats. Navigating the **reef** and **sandy bottom** areas, you'll likely encounter various fish species, often darting among the corals. Keep an eye out for opportunistic sightings of squid, particularly during specific seasons. Smaller invertebrates like crab and sea slug species are commonly observed, adding intricate detail to the dive. The rare harlequin shrimp can also be a highlight, camouflaged within the vibrant surroundings. Spring welcomes a resurgence of marine life, including numerous nudibranchs, while autumn may bring different migratory species to the area.
Dive Sites Near LongDong NO.4
View all dive sites in Taiwan, Province of ChinaDiscover more underwater gems in this area.
Dive Centers Near LongDong NO.4
No Dive Centers Local To LongDong NO.4
Are you a dive center visiting this location? Get listed to reach divers.
Frequently Asked Questions
What are the typical maximum depths at LongDong NO.4?
Divers exploring LongDong NO.4 can generally reach a maximum depth ranging from 23 to 26 meters (75 to 85 feet). The site offers a progression from shallower reef sections to deeper, more complex underwater structures, catering to recreational divers.
Is LongDong NO.4 suitable for beginner divers?
Yes, LongDong NO.4 is suitable for a range of diver levels, including beginners. Its accessible shore entry and shallower sections provide a good environment for those with Open Water Diver certification or even Discover Scuba Diving experiences. More advanced divers can explore deeper areas.
What is the water temperature like throughout the year?
Water temperatures at LongDong NO.4 vary significantly with the seasons. Summer months typically see temperatures between 24-29°C (75-84°F), while winter can bring cooler waters down to 16-19°C (61-66°F). Spring and autumn offer moderate temperatures in between these extremes.
What kind of marine life can I expect to see?
The site is home to diverse marine life, including various fish species, squid, and crab. Smaller creatures like sea slugs and nudibranchs are common, and there's a possibility of spotting more unique species like harlequin shrimp. Seasonal changes can also bring different migratory species.
How is the visibility at this dive site?
Visibility at LongDong NO.4 varies depending on seasonal conditions and recent weather, generally ranging from 10 to 30 meters (33 to 100 feet). It tends to be excellent during the summer months and can be lower in winter due to rougher seas.
What certifications are recommended for LongDong NO.4?
PADI Open Water Diver certification is suitable for exploring much of the site. For those looking to extend their depth and explore more advanced sections, PADI Advanced Open Water Diver training would be beneficial. Rescue Diver certification is also a useful skill for any dive site.
Liveaboards Sailing to LongDong NO.4
Explore highly rated liveaboards visiting this dive site and discover the best routes in Taiwan, Province of China.
Resorts & Accommodation
Find partner hotels and dive resorts directly accessing the reef.
Around This Area
Explore top-rated restaurants, activities, and attractions near LongDong NO.4 reviewed by travelers.
Planning to dive LongDong NO.4?
Send one inquiry and receive offers directly from the best verified local dive operators.

