Never sail alone , and be sure to have a rescue plan. The current or wind can carry you and your board a long distance. Be sure your sailing friends will pick you up should you get into trouble. Note the equipment and sail size other sailors are using . Remember, the wind conditions on shore are usually lighter than on the water.
Strong easterlies are more dangerous because they blow in the same direction of the current.
It is against the law to windsurf under the influence of intoxicants. Familiarize yourself with hypothermia. Wind chill factor even on a mild day can be dangerous. Watch out for other sailors . Provide help if you can, and alert others for assistance.