Cell colours
Distance from your set ideal — green is ideal, black is far from it. Each row tints from its own parameter: icon from rainfall in mm, % row from rain probability, wind / gusts from wind speed, swell from swell height (DWS routes only). They're independent, so an icon can be green while the % row is red on a "cloudy-but-might-rain" day.
Weather icons
Hover any cell to see the underlying numbers.
Data & models
Weather (temp, wind, gusts, rain, sky) — Open-Meteo forecast API. Choose the model under ⚙ Settings: Auto blends the best available for each location, or pin one — UK Met Office, ECMWF, DWD ICON, NOAA GFS or Météo-France.
Swell & waves (height, period, direction) — Open-Meteo's Marine API (ECMWF WAM wave model), fetched only for crags near the sea. The chosen weather model doesn't affect these.
Tides — not a harmonic prediction: they're derived from the marine model's hourly sea-level height (peaks interpolated for HW/LW). Heights are relative to mean sea level, not Chart Datum, so they're approximate and not for navigation.
All times are in each crag's own local timezone (BST in summer, GMT in winter), and the forecast runs ~7 days ahead.