There was, but it wasn't effective in directly assisting the landing forces, for various reasons considered in this thread. u/davratta and u/Badgerfest point out the hindrances to effective close air support on 6 June 1944.

And for completeness, I've collected some answers from u/thefourthmaninaboat regarding the naval side of things a few days ago.

There was bombing of the beaches, just nothing on the level of say a Hamburg or Dresden. Carpet bombing ain't all that great when you're trying to take out anything smaller than a city and could also be detrimental to your aims. The destruction of Caen is a great example of the dangers of indiscriminate bombing. It done nothing to further the British advance, it could be argued it made Caen easier to defend for the Germans and it brought the ire of the French the troops were there to try and liberate.

However, simply because there was no heavy bombing of the beaches in the manner you suggested, doesn't mean there wasn't a supreme effort to aid the landing troops. The allied airfleets were put to use disrupting the German military far from the beaches, in order to prevent reinforcements coming up and to knock out any heavy guns near the beach that could be found. To quote Beevor in his book on D-Day "Everything (in the Eighth Air Force) that could fly would be taking off that morning". He also goes on to talk about the RAF sending 1,000 bombers to attack coastal batteries with more than 5,000 tonnes of bombs. One of the aims of the American bombers was to "soften up the defenders, but also to create bomb craters on the beaches to provide shelter for ground forces who followed us in.

The sad fact was in a number of instances, the bombing that was meant to help the landing troops was horribly inaccurate, landing far from where they were meant to. One major issue was the bombers tended to fly in from the sea as opposed to along the coast. This was to keep their exposure to anti-air fire to a minimum but it led to bombers holding off dropping their loads because of a fear of hitting their own troops. As such they tended to bomb just beyond where they were needed most. Again, to quote Beevor "One officer in the 1st Division observed angrily, 'The Air Corps might just as well have stayed home in bed for all the good their bombing concentration did'".

In addition, experience from WW1 also showed that if you turned the battlefield into a moonscape then it may help protect you from enemy attack, but it also prevents you from pushing forward. And one of the key objectives for D-Day was to link up with the paratroopers and form a suitable beachhead in order to begin marshalling the troops, building airfields storing supplies needed to push deeper into France.

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edit: wording was off