Mexico does not have nautical weather reports. The best bet is Ham cruiser nets. There are three of them that provide weather forecasts of the Sea of Cortez. While in La Paz, the Cruiser''s net on
VHF hand down the ham forecasts to the fleet.
Email me directly and I''ll send you the ham frequencies to monitor. You''ll need an HF receiver to listen in.
Cheers Bob S/V Cherokee