This link contains a satellite map of swell height and direction over the entire Monterey Bay area, allowing you to see which dives sites are subject to the greatest water turbulence. This is an incredibly useful resource which is updated every 4 hours. This link provides you with a forecast of swell height in the Monterey Bay area. Monterey Bay is a little hard to spot, but this link can help you predict when overall swell height in the Monterey Bay area is likely to be high or low. This link contains data from the NOAA 46042 buoy, which monitors wave height and direction, wind speed and direction, wave period, and air pressure.
All data is updated hourly and time series graphs are available for all data.
This link contains data from the offshore buoy which services that stretch of coastline. Recently there have been many issues regarding the ocean water quality in Monterey Bay. This link will take you to the Monterey Beach Hotline site, where data on oceanic bacterial counts is kept.