Bangkok's dining scene has hit one of its regular refresh cycles, with a batch of hotel restaurants and bars rolling out new menus just in time for the cooler months. If you're visiting between now and early December, there's a lot that wasn't on the table last year.

At Conrad Bangkok, Japanese restaurant Kisara has launched a Sunday brunch built around sushi, sashimi, teppanyaki and a made-to-order Age-Sando on crispy shokupan — think wagyu beef and black truffle, or matcha and strawberry cream for the sweet end. Two centrepieces stand out: a wagyu carving for two, done tableside with dashi Yorkshire pudding and wasabi cream, and a two-tier seafood tower finished with liquid nitrogen. There's also a new six-course Nikkei Kaisei dinner blending Japanese technique with Peruvian flavours like ají panca tiradito sauce.

Over at the Kimpton Maa-Lai, bar Ruby's has launched the second volume of its narrative cocktail menu, "Transformation" — 13 new drinks, each named after a precious stone and each continuing the story of the bar's fictional muse. The Diamond mixes tequila, mezcal and sake, clarified with milk; the Sunstone is a genuinely savoury build of cognac, bacon and blue cheese. There are also low-ABV and zero-proof options made with the same fat-washing and fermentation tricks, which is a nice touch if you're pacing yourself.

Truffle season is the other big theme. New York Steakhouse at the JW Marriott is running a black autumn truffle menu from 1 November to 31 December, shaving French truffles over Tallawanta black Angus carpaccio, truffle polenta with portobello and grilled snow fish in truffle beurre blanc. Côte by Mauro Colagreco at Capella Bangkok goes the foraged route with a six-course "Fall In Flavours" menu of mushrooms, roots, berries and wild game — rabbit, partridge, roe deer — available until 8 November. Elements at The Okura Prestige has its own autumn tasting journey pairing Japanese produce like Toyama Bay crab and Fukuoka persimmon with European caviar and French technique.

For something closer to the ground, The Siam Tea Room at the Marriott Marquis Queen's Park is serving northern Thai dishes you won't find in most Bangkok restaurants — larb kua, slow-braised beef gaeng om, and som poi leaves, a genuinely rare sight on a city menu — until 30 November. Meanwhile Wasteland has bottled its first craft spirit, Nual, a savoury botanical spirit inspired by traditional Thai fragrance candles, made locally with Inchon Distillery and poured in a launch cocktail menu until 30 November.

Why it matters for travellers: Bangkok's hotel dining is some of the best value fine eating in Asia, and these seasonal menus are time-limited — several end in November, so timing your trip matters. Whether you want a tableside wagyu carving, a cocktail shaped like a black bat in a cave (The Loft's new "Floral Zoo" menu is worth a look too), or northern Thai food you'd otherwise travel to Chiang Mai for, this season's refreshes reward planning ahead. Book the truffle and foraged menus early; the good tables go fast.