Chesil Cove

Dive Guide

You’ll be amazed at what you will see underwater at Chesil Cove. Whether you’re into environment and nature, history and wrecks or video and photos, Chesil guarantees some amazing diving day and night as one of the most popular shore dives on the South Coast.

An abundance of flora and fauna is complemented by the remains of many vessels that have struck this beach and broken up in furious storms – now all natural shelters for life.

Easy access and depths ranging from 6 to 18 metres and minimal tidal influence makes Chesil ideal for any level of diving all year round. To make it even easier for you, we follow Chesil Cove every day and take a photo of the conditions to share with you on our public FB blog. You can FOLLOW US.

Underwater Explorers is just around the corner from (on the way to) the Cove and open every day (including weekends and bank holidays) with extended opening times for summer weekends for all of your needs, from air, nitrox, trimix fills to equipment rental.

If you have never been to Chesil Cove before, we recommend you take a look at our Guide to Getting to Chesil Cove which also has relevant information on parking and entry.

(We also have a YOUTUBE CHANNEL dedicated to Chesil Beach Watch where we have more underwater videos of the conditions, sea life, topography).

The Chesil Dive Site

At the southernmost edge of Chesil Beach, Chesil Cove is part of a storm beach and the pebbles slope steeply down towards the water, leading to rocks, reefs and sand bed. The Cove can be dived in any state of tide as currents are ‘generally’ weak but you must watch out for swell and undertow especially during Spring Tides (where the tidal zone difference is greater) or during westerly winds.

The site is sheltered from most North and East winds but anything above a Force 3 from the South or West creates a swell – making entry, but more importantly exit, difficult.

 

Visibility in the Cove can range anywhere between 1 to a spectacular 15 metres depending on season and swell, with average visibility being in the range of 3-6 metres. The famous storms of Chesil which have claimed numerous vessels over decades can affect visibility seriously, requiring several days for the conditions to settle Please note: The height of swell/waves reaching the shore and the almost sudden depth increase on entry need to be taken under consideration. A list of risks and recommendations have been given at the end of this page for your convenience and safety

 

HIGHLIGHTS

Sand, pebbles, rock, reefs, small and large chunks of wreckage and kelp forests. Sandeels over the sand beds. Over patches of sand beds between the reefs and rocks, watch the larger sandeels and fish feeding on smaller schools of sandeels. Watch thousands of sandeels swimming at the same time, ducking in and out of the sand. Depending on season, observe cuttlefish laying eggs or on the hunt both over sand and rocks. See dogfish, crabs, lobsters, snakelock anemone, giant wrasse, bass and even john dory and triggerfish in their natural environment. Under the larger boulders in the shallows and on patches of red algae, observe the seasonal reproductive chains of seahare. Look close enough and you’ll be amazed at the micro life including many types of nudibranch.

ENTRY & EXIT

While divers can enter the water anywhere on the Cove, both the Council and locals strongly advise diving entry be made down the ramp to the right of the storm gate. This rule, is emphasised by a permanent sign on the wall of the esplanade. Once down on the pebbles and off the ramp the easiest way to get in the water is to walk in with your BC inflated and then put your fins on (though some prefer to sit on the bank and then slowly crawl in or walk in backwards). If it’s slightly choppy entry may be difficult due to swell and undertow and exit even more difficult. Because the beach drops off immediately, it is possible to lose a foothold in a couple of steps, especially when on high water so an inflated BC on entry is highly recommended. Only a few yards from the shore, depth will range between 3-6m but if there is a lot of undertow or swell, it may be prudent to swim out slightly more and then drop deeper.

 

UNDERWATER ROUTES

The best area to dive in the Cove with depths ranging from 6 to 18 metres maximum are between the disused sewer pipeline (which starts more or less in front of Quiddles cafe) and the area which falls across the famous Cove House Inn – where pebbles give way to sand patches and eventually the rocks of Portland. The best scenery, undoubtedly, is found in the 8-14 metre range among the rocks, pebbles and various wreckage which shelter an abundance of sealife – which happens to be right in front of the ramp entry point described above. Therefore the first dive we suggest is directly down from the ramp.

Chesil Cove has numerous underwater “trails” but can easily be dived straight in-and-out like any other beach. Rule of thumb in the Cove is Out Is West, In is East. If you ever get confused, just head East or 90 degrees and you are sure to come ashore somewhere! Chesil Cove goes down steep on entry and then in steps from 3 metres on as it eventually bottoms out at around 12-14 metres, though depths can exceed 18m further out. From shallow to deep, the beach is made up of small to larger pebbles with rocks scattered here and then, then rocky reefs and rock outcrops which give way to patches of flat sand and eventually a sandy bottom further West and North West. Depending on season the area up to the sandy bottom can be covered in seaweed and/or kelp whereas there is a more expansive kelp forest towards the South end of the beach (see below).

Assuming you are going straight down the “diver’s entry ramp” (marked in red above) from the main road and entering the water, the quick sketch above gives you an idea of possible routes and what you could see. Slightly to your “left” will be a wreck. To the far left will be the kelp forest and pipe. Straight ahead you will have rock outcrops and reefs. To your right (1 o’clock) will be rocks leading to sandy seabed.

(The Trails described below are approximates and assume Entry Point being the shore in front of the top of the ramp)

 

TRAIL 1- STRAIGHT IN & OUT (Easy Route)

From above entry point if you swim out 270 degrees, after a few large rocks and reef you will come upon a sandbank at a depth of 12-15m. If you follow the reef to either side, you can navigate back to the point you left the ‘track’. This “in and out” direct route is the simplest way to start exploring Chesil Beach if you are looking to avoid swell in the shallows.

A visual line of direction will allow divers to branch off and return to the “trail”. Once you descend, you could also take a look to the left side (south) at about 6-8 metres and see the wreckage of what is believed to be the Preveza, which broke up on Chesil during a storm in 1920. This route is ideal during the season to spot John Dory and Cuttlefish as well as Wrasse, Crabs and Lobsters.

TRAIL 2 – THE KELP FOREST (Easy Route)

The Pipe-Kelp Forest trail (to the left after entry – South) can either be linked to another route or done independently.

Keeping to a depth of about 6-8 metres (depending on the state of tide) divers can follow the shoreline where pebbles blend into rocks until arriving at patches of sea weed and kelp which eventually become a full blown ‘kelp forest’ around the disused sewer pipe.

This can be an immersing experience particularly when the kelp forest is dense and marine life is abundant with maximum depths not exceeding 12m. There is much to see both in the kelp beds and around the pipe (but watch out for fishing lines and torn nets). This is a great dive which takes the diver over the wreckage of the Preveza and rocks.

 

TRAIL 3 – ROCKY REEF

Upon doing the entry described in Trail 1, if you stick to a bearing of 270 degrees for about 1/2 a mile crossing large areas of rock and sandy patches, you will finally come to the edge of the rock reef marked initially by some large (2-3 metre high) rocks. Depths here may reach or exceed 18 metres.

Heading out you can explore the edge of the reef with the rocks on your left and sandbed to your right or do the opposite on an inward trip. This route (approximately 50-60 minutes) requires quite a long underwater swim so close monitoring of pressure gauge (or a large volume cylinder) is recommended. Depths here average 15-18 metres.

 TRAIL 4 – BEYOND ROCKY REEF (NW Route)

As above, if you are fairly confident about your consumption, enter the water and on reaching 8-9 metres depth take a bearing of 300 degrees – hence we’ve dubbed this the North West route. After 10-15 minutes depending on your finning speed you will come to the edge of the rocky reef and see a sand bank stretching ahead. Turn left while keeping the sand to your right and follow the reef outwards to a depth of about 16-18 metres. You will come across a large piece of wreckage on the sand itself). Further on and a metre or so deeper follow the reef edge until you come across mores wreckage and massive tree trunks lost off board in storms,

 

Look at the “rocks” closely here as some may surprise you (being encrusted wreckage). The area is covered in various sizes of encrusted metal objects, most of which came from the ships that have been grounded on Chesil and broken up. Maximum depth can reach 19 metres on this trail and due to the distance involved, close monitoring of pressure gauge is highly recommended.

Each of the above “trails” can obviously be followed or explored through different entry points but the easiest and advisable one is as above. Whatever you do, don’t forget to read up also on our Conditions & Risks section below before organising your first Chesil Cove dive. You can call us 7 days a week 9 to 5 on 01305824555 for queries and advice. You can also follow our DAILY photographic update of Chesil Beach on CHESIL BEACH WATCH.

Visiting Chesil… It’s not only about diving. There’s a lot of fun to be had with family. Why not build a stone stack and see how high you can go? But don’t forget, you are not allowed to remove and take away pebbles from the beach. Enjoy them where they are…

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© Izzy Imset

Photo(s) 2019 © Izzy Imset – All Rights Reserved.

2019 SPECIALS

Air fills only £4.50

10, 12 and 15 litre air fills (including manifolded twin 7s) only £4.50 and Nitrox 32% fills only £7.00 for this year. Better still you can rent a 12L single cylinder for only £7.00 per-day saving you the trouble of transporting your own tank.  

Disclaimer: The purpose of this page is to give a starter point for visiting divers and enhance safety on the beach. In no way is it an official guide to the beach and it is the divers’ personal responsibility to dive to the limits of their training and agency, to check conditions such as weather and tide prior to planning any dive. Neither Underwater Explorers nor those divers who have given feedback towards this guide accept responsibility for the actions and decisions of divers. The following notes contribute to awareness and do not substitute any formal guided diving activity, official guidance or advice by agencies and/or dive clubs. It is your responsibility to dive to your limits in conditions you are accustomed to, deciding on your own safety and dive plan. With that said, safe diving and we hope you all enjoy your Chesil Cove experience!… Scroll down for our own generic assessment your own observations can always add to.