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|Mean Spring Curve
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Small tidal stream inaccuracies can develop when advancing beyond HW Dover +6. Because of this we only enable today's tidal stream chartlets to advance 24 hours. Future tidal planning is best accomplished by using Portmore's future tides predictor below.
The above image represents the current tidal streams offshore of this haven. Streams attaining three knots and above are highlighted by red arrows . All times are in local time with red text indicating springs, blue indicating neaps and gray between tidal events. Click [+] to advance the estimate by an hour and click [-] to step back. Future tidal planning is best accomplished by using Portmore's future tides predictor below.
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Arrows represent the direction of tidal streams with lighter or shorter arrows indicating weaker streams. Stronger streams are indicated by heavier or longer arrows, and as mentioned above, red arrows flagging rates of 3 knots and above. Numerals represent [mean neap, mean spring] rates in tenths of a knot. For example the numbers 12,23 would indicate a mean neap of 1.2 knots and a mean spring of 2.3 knots.
More local tidal detailsToday's Galway (North West) tides — High waters: 11:10, 23:44, Low waters: 04:13, 16:43
Today's Dover tides — High waters: 03:51, 16:24, Low waters: 11:18, 23:49
We are now on Neaps.
High Water Dover -0500 or approximately HW Galway +0100
Local HW Constant +0110 Galway, Dover –0500,
MHWS 3.3m MHWN 2.5m MLWN 1.6m MLWS 0.4m
Direction of stream Inishtrahull Sound
HW Dover start +0315, end -0115, ESE going, max speed 4 kn for 8 hours.
HW Dover start +0015, end +0315,WNW going, max speed 4 kn for 3 hours.
There is little slack at the start of the flood. However at the start of the ebb, from HW Dover -0115 to +0015, there is an hour and a quarter of slack water although this is reduced to half an hour in springs.
A rougher seaway tends to exist west of the Garvan Isles than to the east. If a choice of approach is available, bound inwards or out, keeping east of the Garvan Isles is most likely to be more comfortable.
Closer into Inishtrahull there is a circular eddy with a whirlpool during most of the west-northwest going tide or flood. It commences shortly after LW and gets very strong in springs, from HW Dover +0100 to about +0430. The stream through Inishtrahull Sound on its south side runs at full strength to within 3 metres of the southern shore off Portachurry at the southwest corner, and a 300 metre wide race stands here during all of the ebb.
For planning purposes only, not for navigation. Please see our terms and conditions.
Click [+] to advance by twelve hours and click [-] to step back. The forecasted time is presented in the top left hand corner of the pressure chart. Click the image to display it in a full window.
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Malin Head MRCC/CRS (Maritime Rescue Co-ordination Centre / Coastal Radio Station) VHF Channel 23 or 1677 kHz covers the west and northwest coasts of Ireland from Slyne Head to Inishowen Head. Donegal Bay VHF Ch 04, Clifden VHF Ch 26, Belmullet VHF Ch 83, Glen Head VHF Ch 24 provide relay stations. Coastguard Radio is always called on a working channel. Emergencies are worked on 16, 67 and working channel. Alternatively, or if ashore, phone 999 or 112 (free) and ask for ‘Marine Rescue’. Gardai (police), Fire and Rescue are also available on this number. Malin Head MRCC/CRS may be contacted directly on +353 77 70103
Other useful contacts in this area:
Harbour Master: VHF Ch 16 and 14 Call sign [Harbour Radio]
P: +44 28 71 861113 M: +44 780 1032387
Greencastle Harbour Master M: +353 872 50 2231
Malin Head Radio Station has a very positive attitude to interaction with leisure craft.
British Admiralty 2723 ‘Western Approaches to the North Channel’ scale of 200,000:1 large scale. Closer in Admiralty 2811 ‘Sheep Haven to Lough Foyle including Inishtrahull’ scale of 75,000 and Admiralty 2697 ‘Lough Swilly’ scale of 25,000:1 that includes Culdaff Bay at a scale of 10,000:1. Imray chart C64 ‘Belfast Lough to Crinan and Islay’ and Chart C53 ‘Donegal Bay to Rathlin Island’ meet in this area. Discovery Ordinance Survey map No. 3 at a scale of 1:50,000 for inland details.
Please note eOceanic makes no guarantee of the validity of this information. Whilst every effort has been made to use valid source data and ensure calculations are correct, no warranty is made. All tidal predictions are approximations and differences used to calculate times and heights at secondary ports are based on stated averages that reduce precision. This information is provided as a guide only and is not to be used for navigation. For navigation please refer to published tidal tables. Actual height and time of tides are affected by barometric pressure and other weather effects. Any data provided on this page is entirely used at your own risk and you must read our legal page if you view data on this site.