Close to the equator the Trade Winds blow the surface waters westward. In the temperate zone, the Westerlies blow the surface waters back toward the east. The result is that in each great ocean basin there is roughly circular movement of the surface waters. Both surface and deep-water currents affect the world's climate by moving cold water from the poles toward the tropics and vice versa. Ocean waters are always in motion.
Currents flow like rivers, waves crash against seashores and tides rise and fall.
Current Events Currents are created by the sun warming ocean layers in certain areas like at the equator. The warmer water expands slightly, creating a slope, and the warm water runs downhill toward the poles. Wind and Waves Ocean waves are created by wind. Energy in the form of waves moves across the ocean surface but the water itself moves in a circular motion beneath the surface. The Ebbs and Flows of the Sea Tides are rhythmic, predictable and are affected by the gravitational pull of the sun and moon.