NOAA Currents Current forecast for North Point (Pier 35). Bear in mind that currents vary wildly across the Bay. It can be flooding at Alcatraz and while ebbing at Aquatic Park
L36 – Tides & Currents Forecast Look up tides and currents for any particular day, plus a nice chart to visualize the current.
Saildrone Current Visualization Interactive, and live visualizations of currents in the Bay. You’ll need to find the ‘SF Currents’ layer in the left-hand menu. We’ve found these visualizations to be very accurate.