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duzzi said..
aerongnr: current at the Golden Gate can go up to four knots. Most often 1-2, but when it goes big, and you are in the water, it is like a fast river! The shore passes by at a clip!
Yes, that is a very difficult if not dangerous flow. When I have measured it here, it was 1-2 knots. I was getting over a 2 knot difference when slogging on a marginal day depending on the direction I was going, per my watch. The wind was only 10-12 or so with some holes that were even lower. I could maintain and gain some ground but pumping to get on the foil was much more achievable in one direction that then other.
With 4 knots you need to be well/over-powered and likely have a support crew with a boat

. I had to swim back a low volume board that I tried to get working (stupidly/naively) in that current on another day and I had to keep an angle going to keep from getting swept back to an adjacent port. I don't think it was going to be a dangerous thing here because the tide was coming in and I would end up on ground soon either way but it would be a multiple hour adventure at one point vs. walking 5-10 minutes. Only spooky thing was seeing manatees (not recognizing them) and hopping onto the small board out of fear before realizing they weren't something vicious.
So, good on thedoor for not going under that bridge!
And also, duzzi, glad that his post inspired you to be on a foil again! I see these videos that thedoor and others post and it's inspiring me too! Especially when he's launching into 360s and riding clew first down waves.