Chad
Unless I am completely misunderstanding what you are saying, you are describing some sort of tooltip, am I correct? If that is the case, using a charting library like ECharts (open source) is one direction you can take. Living bang in the middle of The UK, tides are not actually my thing but I guess a similar example would be a meteogram for weather forecasts. Can can see an example of that on my dashboard at
https://claydonsweather.org.ukIf you find the forecast card, you will see a link to my forecast meteogram, click on that and it will appear in a popup modal wondow. Follow the curves with with your cursor and you can track the forecast predictions. If you click on some of my heatmap links and other charts around the various cards you will see various other examples.
If indeed this is what you want to do with your tide data, I can certainly help your with this.
Ian