You want to consult a proper weather map. I like Wetter3 and Wzkarten.
For Wetter3, click on Standardkarten, then in the drop-down menu on "Niederschlagsumme". Then, with the arrows next to "Termin", scroll to the relevant time (indicated in UTC). You can change the area with "Gebiet" — note that the alternate GEFS output is listed as a separate option here. For 24 hours ahead, you might get a map like this:
or, for cloudiness a bit later (select Gesamtbewoelkung):
or, from another model, the probability of getting at least 1 mm of precipitation within 6 hours (select Europe (GEFS) in Gebiet, then "Wahrsch. fuer Niederschl (>1.0)"):
if you're in The Netherlands, bad luck... nowhere to go for your criteria (unless you have a boat)!
You can also select other areas and indicators, such as temperature. The interface is in German and it shows the direct output from the GFS weather model, so many indicators are relatively expert and it may be less accurate than data processed by an experienced meteorologist. But the simpler outputs such as temperature and precipitation give a good indication of where to go for good weather within the next week or so.
WZkarten has a similar functionality, and additionally offers "spaghetti plots" that plot several models within the same map. This gives an indication of uncertainty — but for the next 48 hours or so, that normally shouldn't be a major issue.