Oneul Bada: Is the Sea Fit for Dawn Swimming?

Field notes

The app asks for an entry time and activity duration, then compares forecast conditions with tide-specific rules for several Incheon-area routes. Its thresholds distinguish average wind from gusts and treat visibility below 2 km as unsuitable, while a three-hour persistence rule filters out brief weather improvements. The page also notes that forecast wave estimates have not been validated against sea measurements and tells users to prioritize what they observe on site.