I took this video near Southsea Castle and the aquarium:
You can see in the last clip of the video I had to stand on the wall to avoid getting wet. Later on whilst taking some photos at Old Portsmouth, I did get soaked by spray from a wave.
This is a nice photo showing just how high and rough it was on the day, I couldn't get to close to the fence because of the waves:
Two of the waves can be seen just reaching the top of the sea wall.
And here it is at low tide in the summer: