I can answer this question myself now. We just sailed from the San Blas to Bocas del Toro. There are contrary currents on this route
up to about 1.5 knots. Copernicus has them accurately charted. NESDIS is wildly innaccurate on this route. It even has the direction 180° wrong in many places.
Ive sailed this route before and was familiar with the currents. My NESDIS question was partially based on wishful thinking...a 180° current
shift would have been a dream!