eOceanic

Tean Sound

Tides and tools

Tidal data as of Sunday, November 10th at 04:59 local time. Refresh to current time

Low Water	High Water
01:00 (2.2m)	01:00 (4.6m)
13:25 (1.9m)	13:25 (4.6m)

We are now on Neaps

Tidal conditions now

Now Falling
Time to low	19:50
Total fall	2.7m

Rule of Twelfths estimates

Remaining fall
Tide height over CD

See using the 'Rule of Twelfths'

Mean Spring Curve

Mean Neap Curve

Intervening Period

Please use tidal harmonic predictions with a sensible margin of safety. The effect of air pressure on tidal height can be substantial. Tide tables assume a standard pressure of 1013 hectoPascal (hPa). One hPa, or millibar, variation from that will change the sea level by one centimetre. Mean sea levels may also be raised or lowered by strong winds depending upon the topographical features of the area.

Tidal Hour:

(Manual calculation)
(Dover)

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. Sorry, future tides are not currently available for Tean Sound. Please check Admiralty EasyTide.

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.

Sorry, future tides are not currently available for Tean Sound. Please use Admiralty EasyTide to predict tide times and heights for the upcoming 7 days. Alternatively use our Christchurch to predict the English Channel's tidal streams, or our Cowes entry for those of The Solent, for up to 18 months in the future.

Do you need more information on the tidal graphics?

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 details

Today's ST. MARY'S tides — High waters: 11:13, 01:00, Low waters: 05:05, 17:53
Today's Dover tides — High waters: 05:05, 17:57, Low waters: 12:11, 01:00
We are now on Neaps.
MHWS 5.7m MHWN 4.3m MLWN 2.0m MLWS 0.7m
Highest Astronomical Tide (HAT) 6.4m, Mean Sea Level (MSL) 2.91m
High Water (HW) St Mary’s is HW Dover -0630, Devonport -0055, Duration 0600
Tides are considerably affected by wind conditions and barometric pressure.

The tide runs nine hours, from low water to half-ebb by the shore, into Old Grimsby Harbour, St Helen's Pool and Tean Sound. It sets outward from the same for three hours only, that is from half ebb to low water.

Isles of Scilly as a whole
The tide in the open sea is a progressive wave, with slack water four hours before and two hours after HW. Tidal currents rarely exceed 1 knot within the island group, but flows of 2 knots or greater occur around the outer edges of the archipelago, with strong tidal races off major headlands. At certain places around the islands, wind against the tide conditions can become quite rough. This is worth considering when making passage plans.

The northeast-going stream, along the southern coast of St Mary's, turns northward into Crow Sound after -0145 Devonport (+0500 Dover), and forms a race that extends across the entrance to the sound, and as much as 2 miles eastward from Tolls Island; it may be dangerous during gales.

At Watermill cove, the northwest-going stream, spring rate 0.9 knots, begins +0430 Devonport (-0110 Dover) and runs for three hours only. The east-southeast-going stream, spring rate 0.9 knots, begins -0455 Devonport (+0150 Dover) and runs till -0100 Devonport (+0545 Dover). The stream is then slack for a short period, after which it again runs east by southeastward, spring rate 0.7 knots till +0430 Devonport (-0110 Dover).

Tidal currents flow in a rotary fashion through the islands with the following behaviours according to the local tidal cycle:

• Local HW -4 to HW -2: The local first flood flows from the south through southwest. Water funnels into St Mary’s Sound and leaves via all other exits. At the end of this period, tidal flow is starting to enter between Tresco and St Martin’s.

• Local HW -2 to HW +2: The local late flood flow is from southwest, west, northwest, and then west. Water enters St Mary’s Sound, and between Bryher and Tresco, and Tresco and St Martin’s, exits between St Mary’s and St Agnes, and St Mary’s and St Martin’s. After HW there is little flow into St Mary’s Sound, and flow reverses in the Bar Point area carrying water southwards.

• HW +2 to HW +4 The local early ebb flows from north to northeast. Water enters between Bryher and Tresco, and Tresco and St Martin’s, and exits by all other routes.

• HW +4 to HW -4 The local late ebb is from the northeast, east, and then southeast. Water enters between St Mary’s and St Martin’s, and exits by all other routes.

Calculate future tides

This tool can be used to estimate future costal tidal streams for this area. All that is required are two simple steps:

Step 1: What is the Dover High Water for the target date?

Use a current Dover Tide Table to find Dover High Water for the target date. The National Oceanography Centre offers online tidal predictions for up to 28 days from today. Click here to open their tide table for Dover

Step 2: Input the target date's Dover High Water

Hour: Minute:

Taking a mean tidal offset from Dover's tide, we expect your targetted date's associated local tide at to be:

High waters: Low waters:

Data based on an average tide is only accurate to within one hour, if you more precise times are required use the ISA tidal predictions, with ST. MARY'S offset -01:00.

Tidal Hour:

()

For planning purposes only, not for navigation. Please see our terms and conditions.

Weather for Tean Sound

Current wind over the protected quadrants

Today's overview


°C °C	°C °C	°C °C	°C °C	°C °C

The above wind speeds are expressed in the Beaufort scale. Red indicates strong winds of 6 or higher.

Headline: Cloudy with patchy rain, but some brighter breaks as well.

Today: A mainly cloudy day with hill fog lingering across the Moors and scattered light rain in places, but some brighter breaks developing further east as well. Milder than Saturday, especially in any sunshine, with light winds for many. Maximum Temperature 15C.

Tonight: Rather cloudy with hill fog lingering across the Moors and the odd spot of rain in places overnight. Mild beneath the cloud, but feeling chilly in any clearer spells. Minimum Temperature 9C.

Monday: Early cloud and light rain soon clear south leaving a dry day with plenty of hazy sunshine. Light winds, and feeling warm in sheltered, sunny spots. Maximum Temperature 14C.

Outlook for Tuesday to Thursday: Remaining settled this week with high pressure bringing largely dry and fine conditions. Turning cloudier each day, but feeling rather chilly, and breezy at times along the south coast.

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.

Contains public sector information licensed under the Open Government Licence

Get today's Met Office Video Forecast

Advanced Haven Search

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We've assumed your desired starting location is "Tean Sound, Cornwall". Change location.

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If it is a listed location, or there is a listed location nearby, simply select the county and haven to determine the search origin. Alternatively if you have a chart, plotter or GPS input the position in decimal degrees. Finally if you are there right now your computer may be able to automatically locate its current position via auto-locate.

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The described position in step one will centre a search and the range sets the radius of a circular search area. All suitable targets, in all directions, within the direct point-to-point or aerial transit path of the range will be presented. Because the search is based on this charted distance in most cases the actual sailing passages will require extra mileage to circumvent navigational obstacles.

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Describe the sectors you want sheltered, where you expect the wind to blow from. You may manually input each by checking the compass points or auto-fill by checking the required days on this location's five day weather forecast, more information.

You may also use a combination of both manual and forecast auto-fill to add additional sectors. Please note that the forecast auto-fill adds one compass point on either side of the forecast to allow for variability. The grey segments in the compass rose provide a visual summary of the shelter construct.

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Please note that forecast auto-fill adds one compass point on either side of the forecast to allow for variability.

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You may refine your search to specify a minimum level of protection, more information.

Quality of shelter is characterised from one to five stars and are described below. All levels are selected by default and you can set what is appropriate by checking the minimum star rating level. If you do not set a minimum level all havens that cover the requested quadrants will be presented irrespective of the quality of the shelter provided.

Specifying the minimum level of protection is important as this may vary significantly depending upon what it is needed for and the prevailing conditions. For instance, if conditions are moderate and it is simply needed for a lunch stop, most all locations from one star will be suitable. When looking for a location to stay overnight in comfort it would be more appropriate to select a three star minimum. Or when seeking shelter in rough conditions a minimum of four stars would be best. All of these depend upon what you are personally comfortable with, plus the capabilities of the vessel and crew.

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level of protection

		Complete protection; all-round shelter in all reasonable conditions.
		Good; assured night's sleep except from specific quarters.
		Tolerable; in suitable conditions a vessel may be left unwatched and an overnight stay.
		Exposed; unattended vessels should be watched from the shore and a comfortable overnight stay is unlikely.
		Stay-aboard; lunch stop or tide-wait exposed or tenacious holding location where a vessel should not be left unattended.

Ease of access

You may refine your search to the set how easy seaward access is to the resources, more information.

Approaches to the shelter are also characterised from one to five stars. All access levels are selected by default and the minimum level of access complexity may be chosen by clicking the appropriate minimum star rating.

This minimum level of access complexity may vary significantly depending upon the time available, the vessel and skill levels of the crew plus the prevailing conditions. For instance, if conditions are moderate, plus time and experience are plentiful, the one star minimum could be the most suitable option for the adventurous sailor. If conditions are more developed, but the visibility is good, a three star minimum could be the best fit. Or when seeking shelter in heavy weather conditions a four stars access minimum may be best. All of these depend upon what you are personally comfortable with, plus the capabilities of the vessel and crew.

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ease of access

		Safe access; all reasonable conditions.
		Straightforward; when unaffected by weather from difficult quadrants or tidal consideration, no overly complex dangers.
		Attentive navigation; daylight access with dangers that need attention.
		Careful navigation; good visibility and conditions with dangers that require careful navigation.
		Highly involved navigation; complex dangers that require arduous navigation, good visibility and settled conditions.

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If you wish to refine your selection to only represent locations that can support a minimum LWS draught input the minimum here, more information.

We tend to highlight the medium draught of a Haven and the search will focus on this. Deeper and shallower water may be available on closer inspection of the text.

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Anchorage

Beach or shoreline landing from a tender

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Berth alongside a deep water pier or raft up to other vessels

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No fees for anchoring or berthing in this location

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Approved port for vessels requiring clearance to lawfully enter the country

Port of entry

Flag physical restrictions

If you wish to flag locations that have the following specific physical restrictions click on the listed icon or icons below.

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to be avoided

Restriction: landing not recommended, possible or permitted here

No landing

Drying

Restriction: access via a channel with a lock or enclosed by a lock

Lock-in

Restriction: height or air draft restrictions may apply

Height restriction

Restriction: access requires lifting or swing bridge to open

Opening bridge

Overwhelming tides

Restriction: may only reasonably accommodate vessels less than a specific length

Length restriction

Restriction: rising tide required for access

Tidal

Sand bar

DANGER: Subject to conditions that could trap and destroy a vessel

DANGER: potential trap

Sill

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to be avoided

Fish farming area

Charges levied

Swimming area

Strong tides

Overfalls

Strong eddies

It is a long way in

Subject to congestion

Separation Scheme

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For draughts of 1m or less

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Specific facilities

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facilities

Cycle hire

Hard-standing

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Cashpoint

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Diesel alongside

Shore power

Electronic repair

Extensive shopping

Fuel by jerry can

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Waste disposal

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Handicapped access

Haul-out

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Airport within 25 km

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Toilets

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Tourist information

Marina cart

Tap

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Water hose

Doctor

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Dry out and scrub

Nice beach

When you're ready press or press to clear and start anew

Contacts and Emergency for Tean Sound

Karma St Martin's, Resort Direct Dial

+44 1720 422317,

reception@karmastmartins.com,

www.karmagroup.com.

Address: Karma St Martin's
Lower Town, St Martin's,
Isles of Scilly,
TR25 0QW

Tresco Harbourmaster (for New & Old Grimsby),

+44 1720 423653,

+44 7778 601237,

harbourmaster@tresco.co.uk,

www.tresco.co.uk/arriving/moorings.

St Mary’s Harbour Master
The Harbour Office,
The Quay, St Mary’s,
Isles of Scilly,
TR21 0HU
Office hours: April-October 0800-1700 daily; November-March 0800-1700 weekdays

+44 1720 422768, out of hours

+44 7789 273626,

hm@stmarys-harbour.co.uk,

www.stmarys-harbour.co.uk/, listening on

14/16 [St Mary’s Harbour], working 14.

Health Centre P: +44 1720 422628
Hospital P: +44 1720 422392
Dentist P: +44 1720 422694
ibleys fuel P: +44 1720 422431
Chandlery P: +44 1720 422710
Scilly Carrs Taxi M: +44 7825 477695
Tourist Info P: +44 1720 422536

Local Navigation Resources

Admiralty Chart 2655 'English Channel Western Entrance' 1148 'Isles of Scilly to Lands End' 34 'Isles of Scilly', 34 'Isles Of Scilly', 883 'Isles of Scilly and the Principal Off-Islands' Leisure Chart Folio - SC5603 'Falmouth to Hartland Point including the Isles of Scilly' (8 to 13) provides various parts of the Isles of Scilly including small scale Falmouth to Scillies.

Imray C10 - 'Western English Channel', C7 - 'Falmouth to Isles of Scilly and Trevose Head', Y49 'Isles of Scilly' (Small Format).

Thank you for using eOceanic, can you suggest how to make it better?

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.