What would Earth's weather be like without oceans?

The ocean is the major factor of heat, and delivers warm air to where ever the current takes it. It will be much colder, winters will be nasty as there are no warming influences of the oceans.

Also, it will be much drier with a significant decrease of rainfall. The oceans are a major factor of rainfall.

Without an ocean, ice would cover 15-23 per cent of the earth.

Deserts would dominate the equator regions, and everywhere else would be COLDER and DRIER.