Scuba Diving at Nudi Rock

Diving atNudi Rock (Greece)

Nudi Rock in Alonissos, Greece, earns its name from the sheer abundance of nudibranchs discovered on its reef. This particular site highlights the island's rich biodiversity, becoming a favored spot for divers seeking intricate macro life. Its designation reflects a historical appreciation among the local dive community for the variety of these colorful marine gastropods.

Tonight's objective overview for Nudi Rock shows an air temperature of 21.5°C. The measured surface conditions include wave heights around 0.4 m. This environmental data is logged for the close of the day.

Dive Site Location & Key Facts

Everything you need to know about this dive site.

Max Depth--
Entry Type--
Water Typesalt
Dive Types
ReefWall

Dive Site Overview

Exploring Nudi Rock offers divers a captivating journey through a varied underwater landscape, perfect for those with an eye for intricate micro-life. Divers here navigate along a defined wall, venture through narrow passages between robust rock formations, and cruise over sprawling reef structures.

A combination of features creates an engaging environment for patient observation. Nudi Rock, primarily a reef and wall dive, consistently reveals a diverse collection of marine invertebrates thriving within its many crevices and on its textured surfaces. Expect to encounter numerous vibrant nudibranchs, true to the site's name; commonly observed species include the striking Flambellinas, the distinct cow nudibranch (Peltodoris atromaculata), the delicate pilgrim hervia (Cratena peregrina), and the visually arresting Spanish Shawl (Flabellinopsis iodinea).

Beyond these prominent gastropods, patient divers might also spot small octopuses expertly camouflaged, various schooling fish darting among the rocks, and an array of colorful small crustaceans, from cleaner shrimp to decorator crabs. While specific maximum depths for this Greek location are not consistently reported, it accommodates recreational diving along its walls, which can extend to 30 m (100 ft), and across shallower reef sections.

The dive experience focuses on slow exploration, allowing for detailed examination of the unique biodiversity. This destination delivers a rich tapestry of small wonders, rewarding patient exploration with detailed marine encounters.

Nudi Rock

Conditions are Excellent

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

Best Dive Window

07:00 - 14:00

Optimal conditions expected

06:12
18:45
H: 10:45
L: 16:20
Air / Sea Temp
22° / 23°
Wave Height
0.6 m
Wind Speed
13 km/h S
Rain Chance
0%

Current conditions near Nudi Rock show 22° air, 23° sea temperature, 0.6 m waves, and 13 km/h wind. Forecast data is refreshed regularly to ensure accuracy.

Radius: ~12km
Updated: Jun 14, 2026, 05:37 local time
MARINE: OPEN-METEOWEATHER: YR.NO

Best Time to Dive

Optimizing visibility for micro-life observation is a key factor when planning a dive at Nudi Rock, Alonissos. The period from March through November generally offers good diving conditions, aligning with favorable weather patterns. During these months, air temperatures are comfortable, ranging from approximately 14°C (57°F) in spring to a warm 27°C (81°F) in mid-summer, before settling around 18°C (64°F) by late autumn. Minimal rainfall, particularly from June to August, contributes to clearer waters. While site-specific water temperatures aren't consistently reported, they typically warm throughout summer and remain pleasant into the autumn. Reduced wave heights and lower wind speeds during the warmer months also tend to improve underwater visibility, creating ideal conditions for spotting the site's namesake nudibranchs.

PEAK SEASON SCORE

84/100
Very Good

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


BEST MONTHS TO DIVE

JUN
JUL
AUG
DIVE SCORE
(0–100)
54
JAN
60
FEB
67
MAR
71
APR
76
MAY
88
JUN
85
JUL
78
AUG
76
SEP
78
OCT
66
NOV
59
DEC
AIR TEMP (°C)
13
13
14
16
18
23
27
27
24
21
18
15
WAVES (M)
1.2
1.1
0.9
0.8
0.7
0.5
0.6
0.8
0.8
0.7
1.0
1.1
WIND (KM/H)
36
33
30
29
26
22
24
29
28
27
33
34
RAIN (MM)
3.0
2.5
1.4
1.5
1.2
0.5
0.2
0.4
3.8
0.8
1.4
4.5
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

Current dynamics at Nudi Rock, Alonissos, are not consistently reported in available data, suggesting they may vary or generally remain manageable. Divers here primarily experience a tranquil exploration focused on discovering intricate macro life along the varied underwater landscape. Navigating the site involves cruising along walls and weaving through natural slots and over rock formations, all while maintaining a steady buoyancy. The absence of consistently documented strong currents allows divers to dedicate attention to the reef's smaller inhabitants. Observing the diverse nudibranch population often requires a slower pace, enabling detailed examination of the reef's contours and crevices. Visibility tends to be clearer during periods of calm weather, enhancing the overall dive experience.

Dive Difficulty & Safety Guidelines

No specific hazards are consistently reported for Nudi Rock in Alonissos, making it a suitable site for certified divers when following standard safety protocols. Divers should always prioritize proper buoyancy control, especially when exploring walls and intricate rock formations, to protect the delicate reef ecosystem. It's advisable to maintain awareness of your surroundings and any local boat traffic if diving without a direct local guide. Always plan your dive with a buddy and ensure your equipment is well-maintained. Consulting with a local Alonissos dive center beforehand will provide the most current site conditions and any specific recommendations.

Recommended Equipment

  • Dive Computer

This gear list is based on verified equipment signals for Nudi Rock, Greece. Always confirm final gear choices with your dive operator, guide, or liveaboard.

Recommended Dive Suit

With water temperatures around 23°C (74°F), many divers find a 3-5mm wetsuit provides comfortable protection.

Being prepared with flexible exposure options is a common approach among experienced divers.

Current forecasts indicate relatively stable conditions for the coming days.

Nudi Rock conditions last reviewed: 05:37 local time (UTC+2), Jun 14, 2026

Emergency & Medical Support

Essential information to help you plan your dive trip to Nudi Rock.

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 Europe.

+39 0642115685
  • 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.

Closest Listed Hyperbaric Chambers

Showing listed hyperbaric chamber facilities within 200 km of this dive site. Distances are approximate straight-line distances and may not reflect emergency travel time.

+

YKIA

Athens, Greece•Approx. 121 km straight-line
Facility Details
Operating Hours
Not listed
ICU Capable
No
Chamber Type
Multi
Multi chamber facility
Facility / Hospital
Metropolitan Hospital
Emergency Phone
12:00 - 20:00
24/7 Emergency Contact
24/7 Listed
No

Information is provided for reference and planning purposes only. Dive Navigator does not verify operational status, staffing, availability, or quality of care at listed facilities. In an emergency, contact local emergency services, DAN, your dive operator, or the chamber directly. Do not travel to a facility without calling ahead.

SourceEUBS / OXYNET

MKYI/NNA (DHDM/ANH)

24/7 ListedICU Capable
Athens, Greece•Approx. 128 km straight-line
Facility Details
Operating Hours
Not listed
ICU Capable
Yes
Fully equipped ICU on-site
Chamber Type
Multi
Multi chamber facility
Facility / Hospital
Athens Naval Hospital
Emergency Phone
07:00 - 15:00
24/7 Emergency Contact
24/7 Listed
Yes
Listed as 24/7 available facility

Information is provided for reference and planning purposes only. Dive Navigator does not verify operational status, staffing, availability, or quality of care at listed facilities. In an emergency, contact local emergency services, DAN, your dive operator, or the chamber directly. Do not travel to a facility without calling ahead.

SourceEUBS / OXYNET

KYI

Athens, Greece•Approx. 130 km straight-line
Facility Details
Operating Hours
Not listed
ICU Capable
No
Chamber Type
Multi
Multi chamber facility
Facility / Hospital
Not listed
Emergency Phone
11:00 - 20:00
24/7 Emergency Contact
24/7 Listed
No

Information is provided for reference and planning purposes only. Dive Navigator does not verify operational status, staffing, availability, or quality of care at listed facilities. In an emergency, contact local emergency services, DAN, your dive operator, or the chamber directly. Do not travel to a facility without calling ahead.

SourceEUBS / OXYNET
Chamber data is sourced from self-reported EUBS/OXYNET listings and has not been independently verified by Dive Navigator. Always contact local emergency services, DAN, your dive operator, or the facility directly before travelling.
View all in Greece

Marine Life at Nudi Rock

Nudi Rock lives up to its name as a hotspot for its varied nudibranch population, making it a prime location for macro enthusiasts. Divers frequently encounter a range of these colorful sea slugs, including distinct Flambellinas, the striking cow nudibranch (Peltodoris atromaculata), pilgrim hervia (Cratena peregrina), and the vibrant Spanish Shawl (Flabellinopsis iodinea). Beyond these prevalent gastropods, the reef environment supports a selection of other small reef inhabitants. The focus here is firmly on the intricate details and smaller creatures that thrive within the diverse coral and rock structures.

Dive Centers Near Nudi Rock

Alonissos Triton Dive Center
10.7 km away

Alonissos Triton Dive Center

4.9| 191 reviews
Today: 09:00 - 14:00 • 18:00 - 21:00
Sun09:00 - 14:00 • 18:00 - 21:00
Mon09:00 - 14:00 • 18:00 - 21:00
Tue09:00 - 14:00 • 18:00 - 21:00
Wed09:00 - 14:00 • 18:00 - 21:00
Thu09:00 - 14:00 • 18:00 - 21:00
Fri09:00 - 14:00 • 18:00 - 21:00
Sat09:00 - 14:00 • 18:00 - 21:00
Ocean Blue Scuba Diving School

Ocean Blue Scuba Diving School

5| 146 reviews
43.6 km

Nearest Airports

Nearest airports to help plan travel to this dive area.

Skiathos Island National AirportJSI
42 km
Nea Anchialos National AirportVOL
104 km
Athens Eleftherios Venizelos International AirportATH
132 km
💵Currency:EUR

Search Flights

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

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Frequently Asked Questions

Why is it called Nudi Rock?

Nudi Rock earned its name from the sheer abundance and diverse array of nudibranchs discovered on its reef. It serves as a primary draw for divers specifically interested in observing these colorful marine gastropods.

What kind of dive is Nudi Rock?

Nudi Rock provides a blend of wall diving and exploring intricate reef formations. Divers can navigate through natural slots and over rock structures, making it well-suited for those who appreciate varied underwater topography and macro life.

What marine life can I expect to see?

Expect to encounter a vibrant nudibranch population, including species such as Flambellinas, cow nudibranchs, pilgrim hervia, and Spanish Shawls. Divers will also find a range of other small, intricate reef creatures inhabiting the site.

Is Nudi Rock suitable for all experience levels?

Specific difficulty ratings are not consistently reported for this Greek site. However, its emphasis on macro life along walls and reefs makes it generally accessible for certified recreational divers; always consult a local dive center for current conditions.

When is the best time to visit Nudi Rock?

Good diving conditions in the region typically extend from March to November. Favorable air temperatures, reduced rainfall, and calmer seas characterize this period, all contributing to better visibility for macro observation.

Are strong currents common at Nudi Rock?

Site-specific current dynamics for Nudi Rock, Alonissos, are not consistently reported. However, the site's primary focus on intricate macro observation suggests currents are typically manageable or vary depending on conditions.

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