The Coriolis force occurs due to Earth's rotation, bending air and ocean currents to the right in the Northern Hemisphere and to the left in the Southern Hemisphere. This causes storms and currents to follow curved paths. In fjords, water typically flows in on the southern side and out on the northern side due to this effect.

Tides are influenced by both the Moon and the Sun, but the Moon has the greatest impact. It slows Earth's rotation, affecting the Coriolis force. Without the Moon, this force would be stronger, and winds more powerful. Tides occur because the gravitational pull of the Moon and Sun varies depending on location. The time between two high tides or two low tides is approximately 12 hours and 25 minutes.

Both tides and the Coriolis force play a crucial role in keeping water moving in fjords.