Scuba Diving at Sithananne Reef

Diving atSithananne Reef (Sri Lanka)

Sithananne Reef is a distinct reef environment offering divers an exploration point within the rich underwater landscapes surrounding Trincomalee, located in Eastern Sri Lanka. This site forms part of a larger network of 13 reef dives available in the Trincomalee area, contributing to the region's appeal for varied marine encounters. It's a natural reef, characteristic of the biodiverse coastal waters here.

As evening covers Sithananne Reef, the local air temperature is measured at 29°C. The current wave height at the surface is recorded at 0.6 m. These late-day readings characterize the surface conditions for the night.

Dive Site Location & Key Facts

Everything you need to know about this dive site.

Max Depth17m / 56ft
Entry Typeboat
Water Typesalt
Dive Types
Reef

Dive Site Overview

As one of many natural coral structures in Eastern Sri Lanka, Sithananne Reef provides a window into the dynamic aquatic ecosystems found offshore. This region features 16 identified reef dives among its 20 recorded dive sites, suggesting a landscape rich with opportunities to explore diverse reef formations.

Diving here allows for observation of typical reef inhabitants and the structural complexities that define healthy coral systems. While specific depth profiles for Sithananne Reef are not consistently reported, local operators often guide dives within depths suitable for certified divers, typically ranging from 10 m / 33 ft down to approximately 25 m / 82 ft, focusing on the reef's natural contours.

It's an accessible site that highlights the natural beauty beneath the waves in this part of Sri Lanka, suitable for various experience levels. The topography here often includes gentle slopes and coral gardens, providing ample opportunities for exploring crevices and observing smaller reef fish.

Divers can expect a relatively relaxed pace, allowing for thorough engagement with the site's biological diversity and its geological formations. This site serves as a good introduction to the reef environments characteristic of Trincomalee.

Sithananne Reef

Conditions are Good

7/10
Confidence: 8/10
Indicates meteorological model agreement and data availability.

Best Dive Window

Optimal conditions expected

06:12
18:45
H: 10:45
L: 16:20
Air / Sea Temp
29° / 29°
Wave Height
0.7 m
Wind Speed
31 km/h WSW
Rain Chance
50%

Current conditions near Sithananne Reef show 29° air, 29° sea temperature, 0.7 m waves, and 31 km/h wind. Forecast data is refreshed regularly to ensure accuracy.

Radius: ~12km
Updated: Jun 10, 2026, 20:03 local time
MARINE: OPEN-METEOWEATHER: YR.NO

Best Time to Dive

Planning your visit to Sithananne Reef is best aligned with the favorable conditions observed from March through July, with April standing out as an excellent month for diving. During this period, air temperatures are comfortably warm, ranging from approximately 27°C in March to 30°C in July. Rainfall is minimal, particularly from April to July, averaging 1-4 mm, which contributes to clearer waters. Wave heights are generally lower, often below 0.5 meters, providing smoother surface conditions for boat travel and entry. These months generally offer optimal dive scores, indicating calm seas and good visibility for a rewarding experience.

PEAK SEASON SCORE

90/100
Excellent

Scores combine air & water temps, waves, wind & rainfall for overall conditions.


BEST MONTHS TO DIVE

MAR
APR
MAY
DIVE SCORE
(0–100)
72
JAN
80
FEB
91
MAR
92
APR
86
MAY
84
JUN
83
JUL
85
AUG
83
SEP
75
OCT
60
NOV
70
DEC
AIR TEMP (°C)
26
27
27
28
29
30
30
29
29
27
26
26
WAVES (M)
1.2
0.9
0.5
0.4
0.5
0.6
0.6
0.6
0.6
0.5
1.0
1.2
WIND (KM/H)
20
18
15
16
21
25
25
21
23
16
18
19
RAIN (MM)
6.3
3.3
1.8
3.5
4.7
1.1
1.3
3.5
3.5
11.2
21.3
9.4
DIVE SCORE GUIDE (0–100)
Excellent (90–100)
Very Good (80–89)
Good (70–79)
Moderate (50–69)
Poor (30–49)
Not Recommended (0–29)

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

A dive at Sithananne Reef typically immerses you in a vibrant reef setting, characterized by its natural coral structures and associated marine life. While specific water temperatures aren't available for the site, the surrounding tropical climate suggests comfortable conditions year-round, making extended bottom times pleasant. Visibility here varies depending on local weather patterns and currents, but often allows for clear views of the reef's contours. Divers should anticipate mild to moderate currents, which can influence the drift along the reef, adding a dynamic element to the experience. The sensation is one of gentle exploration through an active underwater habitat.

Dive Difficulty & Safety Guidelines

Diving at Sithananne Reef requires adherence to standard safety protocols and an understanding of local conditions. Always dive with a reputable local guide who possesses intimate knowledge of the site's specifics, including currents and entry/exit points. Thorough pre-dive briefings are essential, covering emergency procedures and marine life interactions. Given it's a natural reef, maintaining neutral buoyancy and avoiding contact with the coral is crucial for both diver safety and environmental preservation. Constant vigilance for changing conditions and responsible diving practices will ensure a safe and enjoyable exploration.

Recommended Equipment

  • Dive Computer
  • DSMB

This gear list is based on verified equipment signals for Sithananne Reef, Sri Lanka. Always confirm final gear choices with your dive operator, guide, or liveaboard.

Recommended Dive Suit

Weather models currently point toward consistent diving conditions over the next several days.

For typical recreational dives, dive skin or rash guard generally provides comfortable insulation. Consider warmer surface protection (like a boat coat) due to brisk winds.

Recent environmental data from Sithananne Reef indicates water temperatures near 29°C (85°F). Surface air temperatures are resting at 29°C (84°F).

Sithananne Reef conditions last reviewed: 20:03 local time (UTC+5), Jun 10, 2026

Due to technical issues with our weather providers, data hasn't been fetched for over 48 hours. The data above reflects the conditions at the time of the last successful fetch.

Emergency & Medical Support

Essential information to help you plan your dive trip to Sithananne Reef.

Hyperbaric Chamber

Hyperbaric chambers are a critical part of dive safety infrastructure. Availability varies significantly by region, and not all dive areas have immediate access.

Before diving, it's recommended to:

  • confirm nearest medical facilities
  • check emergency procedures with local dive operators
  • ensure dive insurance covers evacuation if required
24/7 Available

Divers Alert Network

Diving emergency assistance available through DAN World.

+1-919-684-9111
  • 24/7 emergency hotline
  • Diving medical assistance
  • Evacuation coordination
View official DAN emergency contacts

Emergency contacts are provided for reference. Always verify local emergency services before diving.

Marine Life at Sithananne Reef

The underwater landscape of Sithananne Reef is a thriving habitat, hosting a variety of reef fish. Among the observed species, snapper are a common sight, often seen moving among the coral formations. The reef structure itself provides shelter and feeding grounds, supporting a diverse array of smaller creatures. Exploring this environment allows for close observations of the intricate relationships between corals and the marine life that calls them home, from vibrant schooling fish to solitary benthic dwellers.

Dive Centers Near Sithananne Reef

Divers Land Dive Club Trincomalee
0.8 km away

Divers Land Dive Club Trincomalee

5| 287 reviews
Today: 06:00 - 21:00
Sun06:00 - 21:00
Mon06:00 - 21:00
Tue06:00 - 21:00
Wed06:00 - 21:00
Thu06:00 - 21:00
Fri06:00 - 21:00
Sat06:00 - 21:00
Dive For You Nilaveli

Dive For You Nilaveli

5| 39 reviews
3.5 km
Srilanka Dive School

Srilanka Dive School

8.1 km 5· 291 reviews
Scuba Safaris

Scuba Safaris

7.8 km 5· 23 reviews
International Diving School Trincomalee

International Diving School Trincomalee

4.2 km 4.9· 83 reviews

Nearest Airports

Nearest airports to help plan travel to this dive area.

China Bay AirportTRR
16 km
Batticaloa International AirportBTC
120 km
Jaffna International AirportJAF
175 km
💵Currency:LKR

Search Flights

Check available flights and routes on Expedia, using the nearby airports listed in this section.

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Frequently Asked Questions

What is the typical depth range for diving at Sithananne Reef?

Dives at Sithananne Reef generally occur within typical recreational dive depths, suitable for certified divers, focusing on the reef's natural contours. The exact depth may vary based on the specific dive plan and local operator guidance.

What kind of marine life can I expect to see at Sithananne Reef?

The reef is a thriving habitat for various reef fish, with snapper being a common sight among the coral formations. You can also expect to observe a diverse array of smaller creatures and schooling fish that utilize the reef for shelter and feeding.

When is the best time of year to dive Sithananne Reef?

The optimal period for diving Sithananne Reef is from March through July, with April often offering excellent conditions. During these months, you'll generally find warm air temperatures, minimal rainfall, and calmer seas with good visibility.

Are currents a factor at Sithananne Reef?

Divers should anticipate mild to moderate currents at Sithananne Reef. These currents can add a dynamic element to the experience, potentially influencing a gentle drift along the reef, so always listen to your dive guide's briefing.

Is Sithananne Reef suitable for beginner divers?

With its accessible depth range and generally mild conditions, Sithananne Reef can be suitable for certified divers of varying experience levels. Always dive with a reputable local guide who can tailor the experience to your skill level.

What water temperatures can I expect while diving here?

While specific water temperatures for the site aren't consistently reported, the tropical climate of Trincomalee suggests comfortable conditions year-round. Divers can generally expect water temperatures conducive to pleasant extended bottom times.

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