days out, tried and tested
One beaches & nature spot is listed in Oude Niedorp so far, which is a short list and we say so rather than padding it. The nearest other towns with beaches & nature spots listed are Zuidoostbeemster (one) and Bovenkarspel (one).
1 beaches/nature in Oude Niedorp

Oude Niedorp is one of the towns this directory covers, with one place listed across every category so far. It is about 39 km from Amsterdam, so a day out here is usually combined with one there.
Weather in Oude Niedorp
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1 of these are pinned above. Tap a tulip to open the listing.
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The one beaches & nature spot in Oude Niedorp is not free — it charges for entry. Free entry is tagged on a card the moment a venue offers it, so this answer changes with the data rather than with an edit, and the listing links through to the venue's own prices.
Of the one beaches & nature spot here: wheelchair access at one. Those are the facilities the venues publish themselves, shown on every card, so you can filter for the one that decides your morning before you set off. Anything not listed is simply not stated by the venue rather than known to be absent.
The closest towns with beaches & nature spots of their own are Zuidoostbeemster (one, about 23 km away), Bovenkarspel (one, about 27 km away) and Halfweg (one, about 38 km away). Distances are measured between centres, so add the traffic. Every one has its own page here with the same detail, and they are linked at the foot of this one.
Measured between town centres, closest first.