Go full manual mode, ISO 100, F3.2-4.0 for sharpness, shutter speeds of .5-1 second depending on how bright your night subject is, white balance set manually to around 4000k but you should play with it to make sure colors come out the way it looks to the naked eye, shoot in RAW so that you can make adjustments post. Apply noise reduction in RAW to both luminance and color noise. I use around 50% for each. adjust saturation and color temperature to your liking.
Boom, what Steve said!
Look up some YouTube videos on the exposure triangle (iso, shutter speed, and apeture). These are the three setting you will tweak in manual mode, and always shoot in RAW (I use JPG and Raw, so the jpg for quick share but Raw will always look better for editing).
If you can't lower the setting low enough you probably need some ND Filters.
But for night shots like these, I would definitely recommend manual mode, gives you the most flexibility.
Not always, but almost always keep your iso as low as possible to prevent grain (can go up to ~1600 max at night) but I try to stay 100/200/400. And open up the apeture (smaller number) to let me light in. Then the third item to adjust is shutter speed, and that you can go long exposure if you want trails of smooth waves etc, but will just have to play around.