Totnes Sub Aqua Club

Slack Water times

South Devon

Here is a list of slack times for some South Devon dive sites. If you have any additions or amendments to make to this list then please email the diving officer.

 

Dive site Depth Slack before HW (hrs) Slack after HW (hrs) Duration (mins) Port Comments
Ambassador 50 1.5 - 2.0 (neap)
2.5 - 3.0 (springs)
3.0   Salcombe Similar to Skaala Note that slacks vary according to neap or springs
Ann Marie 27 2 3   Torbay  
Barn Pool 5-40 HW HW 45-75 Devonport Slack is -30 to +15 on springs; -45 to +30 on neaps
Baychattan 57   3-4   Salcombe There's no slack before HW
Benton Castle 35 2 3   Dartmouth Best viz after HW
Berry Head dropoff 35   3-4   Torbay Best done at slack.
Bretagne 28 2 4   Torbay Diveable at many states of the tide, but best on slack after HW
Burgh Island 5-25       Challaboro'  Diveable at any state of the tide
Cantabria 10       Salcombe  Calm water is needed for this dive - any swell ruins the dive
Cod Rock 20+       Torbay Do you really want to dive this?
Dartmouth Submarine 52 2.5 3.5   Dartmouth Best viz on slack after HW
Dartmouth Tug 15       Dartmouth   
Devil's Point 35 HW HW   Devonport Slack is -30 to +15 on springs; -45 to +30 on neaps
Draystone 15-25 2 2   Devonport  
Dudley Rose 40 2 4   Torbay Poor slack/viz on before HW slack
Earlstone            
East Rutts 14-40 2.5? 2.33   Salcombe If not slack then be careful which side of the Rutts you place your divers
Eastern Blackstone 0-30 2 3   Dartmouth Usually a sheltered place somewhere
Eastern Kings 10-30 HW LW   Devonport Diveable in most states of weather. Slack is -30 to +15 on springs; -45 to +30 on neaps
Eddystone 3-49 3-4 2-3   Devonport Diveable somewhere at any state of the tide
Elk 32 3 3   Devonport Diveable at most states of the tide, but best at HW & LW
Elsa 40+ 2     Dartmouth Can be dark
Elk Reef         Devonport  
Empress of India 44 1 5   Devonport  
Foyle 46-50 3 3   Devonport  
Galicia 20       Teignmouth Diveable at any state of the tide
Gammon Head         Salcombe  
Glen Strathallan 15       Devonport  
Glocliffe 38 2 4   Dartmouth  
Greatham 46 2 3   Dartmouth Best viz on slack after HW
Greeleen 43 2 4   Devonport  
Hand Deeps 7-55 3-4 2-3   Devonport Experienced divers could drift dive at any state of neap tide
Hat Rock 20-60 3-4 2-3   Devonport  
Hertzogin Cecilie 7       Salcombe Diveable at any state of the tide. Can be strongish currents at eastern edge of the bay.
Hey Tor Reef 30-45 2 neapish     Devonport Probably similar to Ambassador. Reef very exposed to tidal streams.
Hilsea Pinnacles 6-30 3 2-3   Devonport Complete slack at -2 to -3 on neaps. Dive on slack.
Hilsea Point   2-3 2-3   Devonport HW + 4 gives good 0.5-1.0 knot drift.
James Egan Layne 12-26       Devonport No strong currrents.
Kendal Castle 49 2 3   Dartmouth  
Knap Shoal 10-20 2-3 2-3   Devonport All drift dives
London Bridge 10       Torbay Diveable at any state of the tide
Lord Stewart 37 2 4   Torbay  
Louis Sheid 10       Challaboro'  Diveable at any state of the tide
Maine 32 3 3 40 Salcombe Really need neaps for this. Currents can vary from surface to bottom.
Medina 50 - 65 2 - 3 3 - 4   Salcombe Vis variable
Medoc 53 2 - 3 3 - 4   Plymouth 3-4 hrs after HW is the better (ie. weaker) slack
Mewstone Dropoff 25-40 2 2   Devonport Diveable at any state of tide on neaps.  Better viz on flood
Mewstone Ledges 10-30 2 3   Devonport  
Morris Rogue 6-14       Torbay  Currents are usually quite slight
Newholm 36 3.5 4   Salcombe Short slack before HW. Neaps advisable. Currents vary through the water column
Northville 43 2 4   Torbay Poor slack/viz on before HW slack
Oregon 33   2.5   Challaboro'   
Paddle Steamer 22       Salcombe  
Persier 31       Challaboro' Diveable at any state of the tide, but some current on springs
Picton Castle 37 2 3   Dartmouth Possible to dive 2 hours either side of slack on neaps. Best on flood
Placidas Farroult 12   0.5 30 Dartmouth Slack 30 min after HW or LW. Best dived on rising tide or HW slack
Poulmic 18-22 2 2   Devonport  
Prawle Point 18-30       Salcombe  
Riversdale 45   3 30 Devonport Doesn't appear to be a slack before HW. Tidal flows can vary from surface to bottom. Springs not advisable.
Rosehill 31 3 3   Devonport Slack not critical?
Shagstone 5-15       Devonport Strongest tidal streams before & after HW, but never that bad
Skaala 47 3 3.5   Salcombe Long slack on neaps (+3 to +4, or more). See Ambassador
Soudan 25 HW HW 20 Salcombe Slack at HW & LW
Starling Drop 25 5 2   Salcombe Site subject to exposed currents
Start Point 9-15 HW HW   Salcombe Diveable at any state of the tide in the shallows near shore
Start Race 24-35   3   Salcombe  Strong tidal race up to 4 knots
The Bull 26-48 2 3.5   Dartmouth  
The Ridge 7-10       Torbay Diveable at any state of the tide
Three Pinnacles 20-30  3  3   Salcombe Mild drift ideal for this site
Tinker Shoal 10-22       Devonport Diveable at any state of tide on neaps.  Best viz at HW flood
Tinsey Head 18 2.5 0.5 15 - 30 Dartmouth Southward drift for much of the time.
Totnes Castle 42   2.5 45 - 60 Challaboro'  
Unicorn 53 3 3   Devonport  
Untiring 54 3     Devonport  
Wells Rock 1-20       Challaboro'  
West Rutts 25-36       Challaboro'   
Western Ebb Rock 8-16+       Devonport  
Wreathier 50       Salcombe  

HW Torbay is HW Devonport +35
HW Dartmouth is HW Devonport +30
HW Salcombe is HW Devonport +10