Flight Crew Air Transport Pilot (ATP)
Flight Crew Type 3955
Inflight Event / Encounter Wake Vortex Encounter
Flight Crew Executed Go Around / Missed Approach; Flight Crew Took Evasive Action
Environment - Non Weather Related; Procedure
Closely spaced parallel approach to SFO Runway 28R. Approximately 1/2 mile behind B777 landing 28L. Winds were 250 at 6 Kts. We noted a slight disturbance on the water surface in the Bay from the wake turbulence. It was a gentle progression and we discussed go-around procedures again and elected to continue the approach. At approximately 150 ft; FO noticed slight vibrations in the yoke (not stick shaker). Within one second the aircraft started rolling off to the left approximately 25 to 30 degrees left wing down and a go-around was already initiated at the first sign of roll off. After an approximate 5 kt loss; a go-around was normal. We returned for landing 28L without further incident.
B737 Captain reported executing a go-around after encountering wake turbulence at 150 AGL on approach to SFO Runway 28R from a B777 on the parallel approach to Runway 28L.