Late the previous day I had spotted a mackerel sky forming and I was pleased to find it still there when I woke up in the morning. I headed up to our local highpoint to the South of Widemouth Bay, Penhalt Cliff, which gives fantastic open views across about 270 degrees, the last quarter being obscured by rising farmland behind.
Mackerel skies can be composed of either altocumulus or cirrocumulus clouds; I believe these to be the former (though I am happy to be corrected) as they do not appear to be particularly high level and are showing grey patches rather than white. I took this shot just after the dawn image that I posted here: Dawn, Penhalt Cliff.
Looking due North up the Culm Coast here, the furthest point you can see here are the cliffs of Lower Sharpnose Point, with the satellite dishes of GCHQ Bude to their right. Bude is on the right at about middle distance up the coastline.
I remain puzzled as to what caused the sharp horizontal line in the water. I don’t remember it from when I was shooting but it is in other shots too so it is not the camera.