San Diego weather is often the weather that laughs at you. For some reason, the forecast will say clear skies and clouds will roll in off the ocean, or the forecast will tell you to wear a jacket for an overcast day and the sun will come out to play.
Key Difference: Oceans are large bodies of water that exist on the Earth. Oceans and seas are both bodies of water and these terms are often used interchangeably due to their lack of proper definition. Water bodies make up the hydrosphere that covers 71% of the Earth. Oceans and seas have slight differences among them.
Sea Vs Lake. Almost anybody knows the difference between a lake and a sea. However, when asked about the true nature of other seas like the Caspian Sea, people will already have second thoughts. Yes, the confusion sets in when identifying some bodies of water which are called seas but are actually lakes.