@richardhc-0 Thank you for suggestion, we may add more in the future. The Tide forecast is still in Beta.

@guard84
You probably would like to see the tidal propagation combined with Wave layer.

But tides are only useful on seashore and you already get this information as @Korina said (in some countries).

@javierguibert
That seems difficult.
Tides are computed in Windy using the harmonic calculation method:
https://community.windy.com/topic/4841/tide-forecast-on-windy
For this calculation it is necessary to get reference measurements for each harbour or location where tides forecast is provided:
https://tidesandcurrents.noaa.gov/about_harmonic_constituents.html
These measurements are generally made by tide gauges.
Windy has tried to collect more data around the world, but apparently did not succeed.

Indeed, there are many countries where these data are not available in open source. In these countries their national hydrographic institute provides the tide forecast.

Could we use satellite observations to measure sea level changes? This is already possible, but probably is lacking of precision in some places. The tidal heights depend heavily on the shape of the coastline and the satellite measurement resolution does not provide sufficiently detailed data.