Station 62304 (16)
Station 62304, also known as the Sandettie Lightship, provides a general sense on how at least one micro-climate is developing in the middle of the Channel.
Were I to swim today, the wind-speed would be c 16-knots in a northerly direction (10 degrees true) with wave heights of around four-feet and an average period in-tween of six-seconds. Note that a wave is measure from the backside from the crest to sea level; the face can be up to 2X bigger when facing front, as any surfer knows.
Today, at the buoy, the measured water temperature is 12C. Visibility five-miles. The readings, while normal for now, are not ideal for swimming and can readily cause hypothermia or sea sickness.
The official season for a crossing really begins in July, when water temperatures are around 14C (and climbing) and the weather calmer. June may be a few degrees colder but there is less competition for a pilot.