It falls on field and tree,
It rains on the umbrellas here,
And on the ships at sea.
-------Robert Louis Stevenson
A lot of people think rain falling into the sea is not needed and is just "going to waste", and can be diverted by cloudbusting to an inland area suffering from drought without causing any problems. That is not correct. Rain falling at sea serves a useful purpose, in fact, several of them. Rain falling at sea should not be diverted or interfered with.
The temperature of the oceans close to the surface is partly regulated by the temperature of the rainwater falling into the sea, and since both biological and chemical processes are highly dependent on temperature, the biology and chemistry of the upper levels of the ocean are greatly affected by the amount of rain falling into the water.
Most marine organisms are able to live in only a rather narrow temperature range, so, since rain over the ocean is usually significantly colder than the upper levels of the ocean water, the ocean is kept cold by the rain falling on it, and if there was no rain, it would soon heat up from the sunlight it received and become too warm for many, if not all, forms of marine life to survive.
Of at least equal importance to the direct effects of temperature, is that the amount of oxygen and other atmospheric gases seawater can hold in solution is dependent on temperature, with colder water being able to hold more gases, so if the water warmed up, it would lose oxygen content, making it less able to support life.
Warmer seas would also be able to hold onto less CO2, so the warmer sea would release CO2 into the atmosphere. Since the amount of CO2 dissolved in seawater is more than the amount already in the atmosphere, that would significantly alter the composition of the atmosphere, with major consequences for terrestrial life.
Salinity can be as important as temperature in determining density of seawater in some regions such as the western tropical Pacific and the far North Atlantic. Rain reduces the salinity, especially in regions of very heavy rain. Some tropical areas get 3,000 to 5,000 millimeters of rain each year. Since denser saltier water sinks into the ocean contributing to the global circulation patterns and mixing, any significant decrease in rain would cause an increase in salinity and would change the ocean currents, with drastic effects on the world climate.
Rainwater forms in conditions of very high orgonotic charge, and since water readily absorbs orgone, the rain that falls contains a higher charge than most other water. So the falling rain carries orgone it has absorbed in the upper atmosphere into the sea, helping to keep the seawater energetically charged. Since the ability of seawater to support life depends on the concentration of orgone in the water, this process of maintaining the orgonotic charge of the seawater is of crucial importance to the viability of the marine ecosystem.
Of equal, or possibly even greater importance, is the addition of microscopic living organisms to the oceans to maintain the biological material available for phytoplankton to feed upon. Raindrops also often contain bacteria which have formed in the atmosphere from the organic material that is created from condensation of energy when the atmospheric energy field contracts, or in relatively rare cases of very high orgonotic charge in the atmosphere, directly from the condensing energy field without the intermediate stage of formation of unorganized biological material first.
In either case, these living organisms come down with the rain, and this added biological material is essential as a base to the oceanic food chain, providing organic substance that the next step up in the food chain, the phytoplankton, need for their survival. So, without rain falling into the oceans, life in the oceans would soon cease to exist.