I should have known the Norwegian weather would have the last laugh. There I was, smug as anything, having packed what I considered a thoroughly sensible selection of layers for a late September stay at a Mausund in South Trondelag. I'd checked the forecast, you see. Twelve degrees, partly cloudy, occasional showers. British weather, basically. I could handle that in my sleep.

The drive from Trondheim Airport had been spectacular enough to make me forget my own name, never mind what I'd actually stashed in my rucksack. Those fjord roads winding through autumn colours so vivid they looked almost aggressive about it. The birch trees practically shouting their yellows and oranges at anyone who'd look. I'd stopped twice for photographs, once for a coffee that cost roughly the same as a small car, and arrived at the coastal road feeling rather pleased with my own adventurous spirit.

Then I stepped out of the hire car at the Mausund, and the wind hit me like a wet mattress swung by an angry giant.

Autumn in South Trondelag, I quickly discovered, is not a season so much as a mood. A damp, theatrical mood with excellent lighting and a frankly unnecessary commitment to atmosphere. The Mausund itself sat there looking impossibly picturesque, all traditional wooden cladding and red paint against grey sea and darker grey sky, while I wrestled my door against the wind and immediately dropped my house keys into a puddle.

The keys, naturally, were attached to my only torch. The torch, naturally, had not been waterproofed since approximately 1987. I stood there in my "sensible" fleece, which was now doing an excellent impression of a sponge, and laughed. What else could you do? The sea churned away in the background, thoroughly unbothered by my little drama.

Inside, the Mausund revealed itself as the sort of place that understands Norwegian weather better than any tourist ever could. Thick wool blankets stacked by the wood burner. Proper fishing gear in the cupboard, the kind that assumes you might actually need it. Windows designed to frame the view while keeping the elements firmly on the outside. I changed into dry clothes and immediately felt rather clever for having booked somewhere so obviously built by people who'd spent actual winters here.

That first evening, the seasonal influence became properly apparent. September light in South Trondelag does not mess about. It arrives gold and slanted in late afternoon, throws everything into dramatic relief for perhaps forty minutes, then exits stage left with theatrical haste. I sat with a cup of something hot and watched it work its way across the water, the islands beyond turning from green to bronze to silhouette in what felt like a matter of moments. The wood burner crackled. The wind continued its performance against the walls. Somewhere, a forecast promising "twelve degrees, partly cloudy" sat on a server feeling deeply inadequate.

What struck me, that first night, was how completely the season dictated the rhythm. Summer visitors might fish at midnight, kayak until oblivion, treat the place as endless playground. Autumn demands a different contract. You move slower. You notice the quality of light because there's less of it. You accept that the weather might keep you indoors with a book, and that this is not failure but feature. The Mausund, I realised, was built for this negotiation between human comfort and elemental theatre.

I fell asleep to the sound of proper Norwegian rain, the kind that announces itself with commitment, and woke to mist so thick I briefly wondered if I'd gone blind. The wood burner needed reviving. The kettle needed filling. Somewhere out there, September continued being absolutely itself, and I was learning to meet it on its own magnificent, slightly soggy terms.