@Avril-Lill Hi, when you say “wave interval” in Route planner, I guess you mean the “wave period” (time between 2 wave crests) ? This parameter is available in Windy. The “wave length” (distance between 2 wave crests) is not available. Personally I agree. The wave period would be much more useful in Route planner rather than the temperature that we don’t take care of it at sea because its variation is almost negligible and not useful for the navigation. It should be possible to replace the temperature line with a wave period line. Much more informative for sailors. Example with a passage from Spain to the Azores : [image: 1709187219947-f8f06ddf-f6ff-4086-88bc-71e0bed6bbf5.jpeg]