Forecasts For SF Bay Are Not Accurate

The NOAA releases forcasts for the day and the coming days. In the winter, most of the forecasts are usually 5-10. Here is this weekends forcast:

Today was the same, 5-10. I got out on the bay abut 11am. By the time I got to Treasure, it was 20. As I approached Angel it was gusting to 27. I got behind the island and the waves deminished but the wind was nice at 15. This same thing happened the three other days I sailed this week, but not as strong. I do sail in the windiest part of the bay and I believe the Tule Fog in the Central Valley is making a huge difference in the winds this winter. For the first time ever, we have had a serious blanket of fog from Fresno to Redding. A distance of over 300 miles of dense fog. The fog has been there for 8 weeks or more. Most winters, a good day is 10 knots of wind. This winter it has been more like 15-20 most days. Not that I am complaining. I am just glad I still go out when the forecast is 5-10. Today was epic!