Scuba Diving at St Mary's Island - West Bay

Diving atSt Mary's Island - West Bay (United Kingdom)

Distinguished by its accessible shore entry, St Mary's Island - West Bay provides an inviting dive experience in the UK's northeast. This site caters primarily to beginners and those seeking extended shallow dives, a welcome contrast to more challenging local conditions. With its focus on easy access and a gentle depth profile, the area offers a relaxed introduction to temperate water diving. It stands out as a voluntary marine reserve, emphasizing conservation.

As evening covers St Mary's Island - West Bay, the local air temperature is measured at 10°C. The current wave height at the surface is recorded at 0.2 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.

Coordinates55.0701, -1.4527
Site Characteristics
Beach
Max Depth--
Entry Type--
Water Type--
Dive Types
Reef

Dive Site Overview

The underwater landscape off St Mary's Island carries echoes of maritime history, though identifiable wreckage is largely fragmented. Several historical shipwrecks, including the Lovely Nelly and the Janet Clark, are recorded in the vicinity, with scattered bits of rusted metal from vessels like the Gothenburg City often encountered.

This particular section, West Bay, is primarily approached via a convenient beach entry, making it highly suitable for novice divers. Depths here slope gently to a maximum of about 6 m (20 ft), ensuring prolonged bottom times. Navigating the numerous gullies around the northern part of the island can be disorienting; awareness of surroundings is important.

Divers often find plenty to observe within these shallower sections, contributing to its appeal for extended explorations of the varied rocky reef and sandy bottom features.

St Mary's Island - West Bay

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
10° / 13°
Wave Height
1.7 m
Wind Speed
19 km/h NNW
Rain Chance
0%

Current conditions near St Mary's Island - West Bay show 10° air, 13° sea temperature, 1.7 m waves, and 19 km/h wind. Forecast data is refreshed regularly to ensure accuracy.

Radius: ~12km
Updated: Jun 10, 2026, 23:16 local time
MARINE: OPEN-METEOWEATHER: YR.NO

Best Time to Dive

Planning a dive at St Mary's Island requires attention to seasonal weather patterns, as conditions significantly influence underwater visibility and comfort. The period from June through September typically presents the most favorable diving scores, ranging from 'Good' to 'Moderate'. During these months, average air temperatures are at their highest, reaching 15°C (59°F) in June and 16°C (61°F) in August. Rainfall is generally moderate, with July seeing slightly higher averages at 3.52 mm. Calmer seas, often requiring about five days of low south-west winds, are crucial for optimal visibility. Wave heights are lowest in June at 0.7 m (2.3 ft), offering more comfortable entry and surface conditions. Conversely, winter months present cooler air temperatures, higher rain volumes, and more significant wave action.

PEAK SEASON SCORE

74/100
Good

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


BEST MONTHS TO DIVE

JUN
JUL
AUG
DIVE SCORE
(0–100)
42
JAN
51
FEB
57
MAR
59
APR
68
MAY
76
JUN
73
JUL
73
AUG
66
SEP
53
OCT
51
NOV
48
DEC
AIR TEMP (°C)
4
6
8
9
12
15
16
16
14
11
8
7
WAVES (M)
1.8
1.5
1.3
1.2
1.0
0.7
0.8
0.8
1.1
1.5
1.5
1.6
WIND (KM/H)
26
26
25
24
21
22
22
23
23
26
25
28
RAIN (MM)
2.6
2.0
1.8
2.1
1.8
1.9
3.5
2.4
2.7
3.5
3.2
2.9
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

Divers seeking shallow experiences at St Mary's Island - West Bay find a distinctive environment suited to various skill levels, particularly those new to temperate diving. This entry point's maximum depth is around 6 m (20 ft), characterized by a gentle slope directly from the shoreline. Underwater, the topography includes varied rocks and numerous gullies, providing ample shelter and foraging grounds for smaller marine life. Scattered remnants of historical wreckage also dot the seabed, adding points of interest. Visibility can vary considerably; it's often reduced after periods of adverse weather or strong tides, demanding careful navigation. Water temperatures, while typical for UK waters, necessitate appropriate thermal protection such as a drysuit for comfort and safety during extended dives. Current activity remains generally mild in these sheltered areas, contributing to a relaxed dive environment that allows for thorough exploration.

Dive Difficulty & Safety Guidelines

Prioritizing safety at St Mary's Island involves understanding the unique local dynamics, especially regarding access. A significant hazard is the causeway to the island, which has been known to be dangerous at high tide, with incidents of people being swept off. Divers should always consult local tide tables and plan crossings carefully. Underwater, low visibility can occur following bad weather, demanding enhanced situational awareness and navigation skills. As a voluntary marine reserve, divers must adhere to the 'take only photos' principle to protect the local ecosystem. Always consider consulting with local dive professionals familiar with the site's present conditions before entering the water.

Recommended Equipment

  • Dive Computer

This gear list is based on verified equipment signals for St Mary's Island - West Bay, United Kingdom. Always confirm final gear choices with your dive operator, guide, or liveaboard.

Recommended Dive Suit

7mm wetsuit or semidry is widely used for recreational dives in waters of this temperature. A hood or vest is suggested for sensitive divers due to surface winds. Strong cold advisory: dress warmly immediately after exiting the water. Those diving at St Mary's Island - West Bay today will likely encounter water temperatures in the region of 13°C (55°F). Surface air temperatures are resting at 10°C (50°F).

Forecasts suggest rising temperatures later this week. A warming trend is expected over the next few days.

Water temperatures can occasionally shift throughout the day depending on currents and depth layers.

St Mary's Island - West Bay conditions last reviewed: 23:16 local time (UTC+0), 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 St Mary's Island - West Bay.

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.

+

North of England Medical Hyperbaric Unit

Anlaby, Hull, United Kingdom•Approx. 162 km straight-line
Facility Details
Operating Hours
Not listed
ICU Capable
Unknown
Chamber Type
Not listed
Facility / Hospital
Not listed
24/7 Listed
Unknown

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 United Kingdom

Marine Life at St Mary's Island - West Bay

Upon descending into St Mary's Island's waters, divers often first encounter a bustling array of crustaceans. Lobsters and various crab species are commonly observed navigating the rocky crevices. You'll likely spot juvenile fish sheltering among the sea life. Occasionally, patient divers might even encounter monkfish in the shallower sections. If luck is on your side, a curious grey seal from the island might approach, adding a memorable interaction to your dive. Observing the local octopus population also provides a rewarding experience.

Image contributors:Hans Hillewaert, Bart Braun
Want to contribute photos or local dive knowledge? Learn how to contribute

Dive Centers Near St Mary's Island - West Bay

Scuba Life Uk
15 km away

Scuba Life Uk

4.9| 40 reviews
Today: 11:00 - 23:00
Sun11:00 - 23:00
Mon11:00 - 23:00
Tue11:00 - 23:00
Wed11:00 - 23:00
Thu11:00 - 23:00
Fri11:00 - 23:00
Sat11:00 - 23:00
The Diving Centre Ltd

The Diving Centre Ltd

4.8| 192 reviews
13.7 km

Nearest Airports

Nearest airports to help plan travel to this dive area.

Newcastle International AirportNCL
16 km
Teesside International AirportMME
63 km
Leeds Bradford AirportLBA
135 km
💵Currency:GBP

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 maximum depth at St Mary's Island - West Bay?

This specific dive site is quite shallow, sloping gently to a maximum depth of about 6 m (20 ft). Its accessibility and manageable depth make it suitable for beginners and those looking for longer, relaxed dives.

What kind of entry points are available at this site?

The primary and easiest entry point for St Mary's Island - West Bay is a convenient shore entry, characterized by its gradual slope. For other parts of the island, access might involve walking across a causeway and descending onto rocks or utilizing a boat slip.

When is the best time of year to dive here?

The most favorable conditions typically occur from June to September. During this period, air temperatures are warmer, and wave heights are generally lower, contributing to better visibility and a more comfortable diving experience.

Are there any shipwrecks to explore?

While several historical shipwrecks like the Janet Clark and Gothenburg City are in the area, they are largely fragmented. Divers primarily encounter scattered bits of rusted metal rather than intact wreck structures.

What marine life can I expect to see?

Common sightings include various crustaceans such as lobsters and crabs, as well as juvenile fish. Lucky divers might spot monkfish in the shallows or encounter a curious grey seal. Octopus are also present.

Is St Mary's Island a marine protected area?

Yes, St Mary's Island is designated as a voluntary marine reserve. This means divers should adhere strictly to 'take only photos, leave only bubbles' to help preserve the local ecosystem.

What should I know about crossing the causeway?

The causeway can be hazardous at high tide and has been associated with safety incidents. Always check local tide tables carefully and plan your crossing to ensure it's safe, or consider alternative access if possible.

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