In the Mediterranean, conditions can change quickly, particularly during mistral or easterly wind episodes. Cross-checking several forecast sources remains the best protection: official bulletins (Météo-France Marine), specialised apps (Windy, PredictWind) and local VHF for same-day updates.
Beyond wind, swell and its direction deserve particular attention when choosing a sheltered rather than exposed anchorage, especially for an overnight stay. 72-hour bulletins give a useful trend for planning the route, but the 12-24 hour forecast should take priority for the final decision to head out.
Finally, never skip checking with the harbour office before departure: local experience usefully complements digital data.