Weather and Tides
Los Angeles Weather
The Canadian Meteorological Center has very kindly created a web page that forecasts cloud cover and sky transparency for the Griffith Observatory. You can access it at http://cleardarksky.com/c/GriffObsCAkey.html. Our thanks to Attilla Danko for providing this service.
See regional satellite maps plus find local weather forecasts at Intellicast.com. And Wunderground.com gives the local weather forecast and nighttime observing conditions (plus a star chart) for the location you choose.
Tidal information for Los Angeles (and other locations) can be found at: Tide and Current Predictor.