You can't kite all year long in San Francisco... Wind season is from Mid-March to Mid-October, usually stronger in May-June, usually more consistent in July-August.
In winter, wind is rather dead. But you can go skiing to Tahoe.
And even during the wind season, it's not windy every day at a given spot.
Sometime you can only kite twice a week, unless your work allows you to chase the wind in a 30 miles radius at any time of the day, then maybe you can kite everyday.