FWIW, I've just returned from a two-week photo/audio recording holiday on the French side of the English channel, mainly recording industrial noises in places like the Dunkirk harbour and along various canals in the region. Much of this happened just a few yards away from the North Sea.
Climatic conditions ranged from +10 deg c and rel. humidity so bad I had to stop taking photos because of condensation on the front lens to -4 deg c at force 6 winds and a constant fine salt spray gathering on the car's windscreen. All this for hours on end, mainly during nighttime.
I've been using two Rode NT2-A and two Behringer B2 Pro, always with foam windscreens and furs on top. At times, the windscreens were so damp I could almost squeeze drops of water out of them. Never the slightest problem with any of those mics.
From my expericence, the enemy lurks in quite different corners where you wouldn't expect him, e.g. bits and pieces on the mic stands rattling in the wind and you don't notice this until back home, or a beautifully calm night atmosphere in the harbour of Boulogne-sur-Mer ruined by the endless barking of a pool full of seals at the nearby aquatic zoo.
In my experience, mics are a lot tougher than most people think.
Cheers,
Ralf