Swanage visibility and dive conditions

See bottom of table for explanation of headings. The potential outlook for diving over the next few days is given in good faith and without any guarantee!

Mary Jo and Sidewinder of Swanage Boat Charters are available for charter or individual spaces - contact Martin and Patricia to book.

Date Time Site Viz (m) Cloud /
Sun / Rain
Tide
hr +/- HW
Present
Sea State / Swell /
Dive conditions
Comments /
Potential Outlook
Sun
29/04/07
09:55 Kyarra
50°34.9N 001°56.6W
4.3

cloud 1, sun at 25°

-1 water colour - green/brown, sea state - slight, dive conditions - OK. similar
Mon
16/04/07
10:45 Valentine Tanks
50°39.4N
001°53.4W
3.0

cloud 4, sun at 30°

+1 water colour - green/brown, sea state - smooth, dive conditions - OK. similar
Sun
15/04/07
09:35 Valentine Tanks
50°39.4N
001°53.4W
2.7

cloud 0, sun at 20°

+1 water colour - green/brown, sea state - smooth/ very fine particles in water, dive conditions - poor. similar
Sat
14/04/07
08:40 Kyarra
50°34.9N 001°56.6W
4.2

cloud 8, sun at 45°

+1 water colour - green, sea state - smooth, dive conditions - OK . improving
Fri
13/04/07
13:04 Kyarra
50°34.9N 001°56.6W
3.8

cloud 8

+6 water colour - green, sea state - smooth, dive conditions - OK . similar
Fri
13/04/07
08:30 Kyarra
50°34.9N 001°56.6W
4.6

cloud 8

+1 water colour - green, sea state - smooth, dive conditions - OK . similar
Tue
10/04/07
10:45 Peveril Ledge
50°36.4N
001°56.0W
4.1

cloud 6, sun at 30°

+6 water colour - green, sea state - smooth, dive conditions - OK . improving
Mon
09/04/07
14:30 Kyarra
50°34.9N
001°56.6W
2.7

cloud 0, sun at 45°

+1 water colour - green, sea state - smooth, dive conditions - poor . improving
Mon
09/04/07
08:45 Kyarra
50°34.9N
001°56.6W
1.9

cloud 0, sun at 25°

+6 water colour - green, sea state - smooth, dive conditions - poor . similar
Sat
07/04/07
13:45 Kyarra
50°34.9N
001°56.6W
2.2

cloud 2, sun at 45°

+1 water colour - green, sea state - smooth, dive conditions - poor . similar
Fri
06/04/07
13:15 Kyarra
50°34.9N
001°56.6W
2.1

cloud 1, sun at 45°

+1 water colour - green, sea state - smooth, dive conditions - poor . improving

 

Visibility is the depth to which a white disk (secchi disk) is visible from the surface, measured as the average of two readings - the depth to which it is lowered and just no longer visible, and the depth at which it reappears when raised. (Usually there is not too much difference between the two). A tilde indicates an approximate reading that is estimated rather than measured (eg: measured: 5, approx: ~5). Note that surface visibility is often different to visibility at depth. Cloud cover and the height of the sun (indicated by time of day, and/or the approximate angle of the sun in the sky) and sea state will also affect visibility. Cloud cover is measured in octas (8=8/8 = total cloud cover, 0=0/8 = clear sky). The state of the tide when the viz was measured is indicated as number of hours +/- HW Greenock and the approximate tidal cycle is indicated by the background: blue = Neaps, red = Springs, yellow = in between.

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