Always sail in conditions that you're comfortable with-and be alert for any change in those conditions. Local weather forecasts on TV and in the newspapers will give you a general overview of what the weather will be. They are the most reliable for sailing conditions, including forecasts of wave heights, tides, fog, thunderstorms, lightning, and so on. The more sailing experience you have, the more weather variables you can handle. Getting caught in the fog-fog in a problem even for experienced sailors.
Thunderstorms often occur in the summer and often bring heavy winds.