Sra Bua at Siam Kempinski Hotel Bangkok has entered a new chapter under Chef Weerawat ‘Num’ Triyasenawat. The restaurant now builds its identity around Thailand’s biodiversity, seasonal produce and the knowledge of farmers, fishermen, foragers and small producers. Guests choose between a Signature Biodiversity Journey and a Plants & Roots Forward Journey.
The current lunch journeys cost THB2,900++ per person from Wednesday to Sunday. Dinner runs daily at THB4,900++ per person for either journey. Zero-proof pairings cost THB890++ at lunch and THB1,900++ at dinner. The double-plus notation means a 10% service charge and prevailing government tax are added.
Quick Guide
| Lunch | Wednesday-Sunday, noon-3pm; last seating 1pm |
|---|---|
| Dinner | Daily, 6pm-11.30pm; last seating 9pm |
| Lunch journey | THB2,900++ per person |
| Dinner journey | THB4,900++ per person |
| Dress code | Smart casual |
Choose the Journey
The Signature Biodiversity Journey can include plants, seafood and meat drawn from different Thai ecosystems. The Plants & Roots Forward Journey puts vegetables, herbs, roots and other botanical ingredients at the centre. Both are designed as complete progressions rather than a collection of interchangeable courses.
Choose according to appetite, diet and curiosity, then tell the restaurant about allergies and exclusions before paying a deposit. Plant-forward does not automatically mean suitable for every vegan or allergy requirement. Ask how stocks, ferments, garnishes and pairings are handled so the kitchen can give an accurate answer.
Understand the Price
Lunch offers the most accessible route into the concept at THB2,900++ before service and tax. Dinner costs THB4,900++ and allows more time for the full sequence. A couple should budget for both menu prices, service charge, tax, drinks, transport and any cancellation condition.
The zero-proof pairing is a distinct purchase, not simply unlimited soft drinks. Ask how many serves it includes and whether water or other beverages are separate. Wine pairing prices may change, so request the live figure when booking rather than estimating from an old menu photograph.
Read the Biodiversity Idea
Chef Num’s menus begin with landscapes, seasons and producers rather than a fixed list of luxury ingredients. Heritage rice, river and coastal products, native vegetables and fermentation can appear in unfamiliar forms while remaining connected to Thai food culture.
The dining room includes a Fermentation Library and a rotating display of roughly 30 heritage rice varieties. Treat these as part of the meal’s context, not a museum checklist. Ask focused questions about origin, technique and season when a course invites them, and allow the service team to keep the experience moving.
Book the Right Sitting
Lunch is served Wednesday through Sunday, with the last seating at 1pm even though the room closes later. Dinner is available daily, with last seating at 9pm. Arriving at the final minute can compress the welcome, allergy confirmation and opening courses.
Reserve through Siam Kempinski, provide a reachable contact and read the deposit or cancellation rule. Mention celebrations without assuming complimentary extras. If the evening includes another booking, leave generous time because a tasting menu should not be hurried to meet a rigid next appointment.
Dress and Arrive
Smart casual is the stated dress code. The restaurant sits on the ground floor of Siam Kempinski Hotel Bangkok with direct access near Siam Paragon. BTS Siam is the simplest public-transport reference, while drivers should confirm hotel parking validation.
Bangkok rain and mall traffic can add time even over a short distance. Meet inside the hotel rather than at a vague shopping-centre entrance. A calm arrival helps the group settle, confirm dietary notes and begin together instead of interrupting the first courses with phone calls and directions.
Make It Work
Sra Bua by Num Weerawat is now a restaurant about Thai place and season as much as polished technique. The two journeys give diners a clear choice between a broad biodiversity narrative and a plant-led route, while heritage rice and fermentation add depth beyond the headline dishes.
Choose lunch or dinner according to budget and time, disclose dietary needs early and calculate the complete ++ price before booking. The strongest visit leaves enough space to listen, taste and understand why each ingredient has been placed in the sequence.
Continue Exploring
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FAQ
How much is dinner?
Both dinner journeys are THB4,900++ per person before optional pairings.
Is there a plant-forward option?
Yes. The Plants & Roots Forward Journey centres Thailand’s botanical diversity, but specific dietary needs still require direct confirmation.
When is lunch served?
Lunch runs Wednesday to Sunday from noon to 3pm, with last seating at 1pm.
Practical Information
Sra Bua by Num Weerawat is on the ground floor of Siam Kempinski Hotel Bangkok, 991/9 Rama I Road, Pathum Wan. Lunch is Wednesday to Sunday and dinner is daily. Book directly, state allergies in advance, confirm the deposit and calculate service charge and tax on top of the listed menu price.