[Mizar]

Hi Gale;
An island in the Pacific that fits your description is Kwajalein Atol, max elevation all of 30 feet, the average high tide is 6 feet, add a little storm surge and the little island is just about underwater. 8 deg 42 min N, 167 d 42 M E in the Marshall Islands group.
An island like this is the perfect place to measure Sea Level, at every high tide, just drop a big rock next to the max waterline along the main road, if the rocks are getting closer over a year, the sea level is rising, if the rocks get farther away, the sea level is falling
M