Thai Square Spa

28 April 2026

May Bank Holiday Plans: A Half-Day of Wet Treatments in the Sen Space

Private Herbal Steam at Thai Square Spa, central London

The early May bank holiday has a particular London rhythm. The first proper warmth arrives, the embankment fills with people walking nowhere in particular, and three free days stretch ahead with no clear shape. Most of us fill them with errands or trains out of town. There is another option, quieter and closer to hand. A short walk from Trafalgar Square, on Northumberland Avenue, you can give a single afternoon over to warmth, water and a long, unhurried breath. A spa day london bank holiday plan does not need to be grand to leave you better than it found you.

This is a guide to building a half-day around the wet treatments in our Sen Space, with a Private Herbal Steam at its centre. It is the kind of afternoon that suits the long weekend well: no rush, no schedule, just heat and quiet and the slow loosening that follows.

What a Private Herbal Steam actually is

The Private Herbal Steam takes place in a steam room reserved for you alone, infused with a blend of Thai herbs. The air is thick and warm and carries the scent of lemongrass, kaffir lime and other aromatics drawn from the same tradition that shapes our massage work. You sit, you breathe, and the heat does the work. There is nothing to learn and nothing to perform.

It is part of our wider range of wet treatments, the part of the spa devoted to heat and water rather than hands. The Private Herbal Steam starts from £65, and because the room is yours, you set the pace. Stay seated, step out to cool, return when you are ready. The privacy matters more than people expect. There is no glancing at a stranger, no holding yourself in. You can simply be there.

How it feels, minute by minute

The first few minutes are an adjustment. The warmth settles over your shoulders and you notice your breathing slow almost without choosing to. After that the herbs begin to register, less as a smell and more as a presence in the room. Tension in the neck and upper back tends to ease first, then the jaw, then the small grip we hold in the hands without realising.

Somewhere in the middle you lose track of time, which is the point. The heat encourages the body to let go of the low, constant alertness that city life keeps switched on. By the end your skin feels clean and soft, your thoughts have gone quiet, and standing up feels like surfacing from somewhere deep. Most people describe a pleasant heaviness afterwards, the sort that makes the rest of the day feel gentler.

Who it suits, and who should take care

Steam suits a lot of people. If you spend your week hunched over a screen, if your sleep has been shallow, or if the cold months have left you feeling stiff and shut down, the warmth is a kind, simple remedy. It pairs naturally with a massage afterwards, and many guests build their half-day exactly that way: steam first to soften, then bodywork to release.

A few sensible cautions. Heat is not for everyone on every day. If you are pregnant, managing a heart condition or blood pressure concern, or feeling unwell, speak to us first and check with your GP. Come hydrated, avoid a heavy meal right before, and do not arrive having had a drink. None of this is meant to deter you. It is simply how you get the most from the heat safely.

Why the long weekend is the right time

There is a reason the bank holiday lends itself to this. A normal spa visit gets squeezed between work and the last train, and you spend half of it watching the clock. With three days, none of that pressure applies. You can come in the late morning, take the steam slowly, add a massage, and still have the afternoon ahead of you. The weekend gives the treatment room to breathe, and so it gives you room too.

There is also the matter of what comes after. A spa day london bank holiday afternoon followed by a slow walk along the river, a coffee somewhere unhurried, an early night with no alarm set, is about as restorative as a long weekend gets without leaving the city. You return to ordinary life lighter, and you did not have to pack a bag to manage it.

What to expect when you arrive

We are at 25 Northumberland Avenue, a few minutes on foot from Embankment and Charing Cross. Arrive a little early so you can change and settle without hurry. Bring nothing in particular: we provide what you need, and the Sen Space is yours for the duration. Our team will talk you through the steam, check in on how you are finding the heat, and adjust anything that would make you more comfortable.

Afterwards, give yourself time. Rushing straight back into the day undoes some of the good. Sit, drink water, let the warmth fade on its own terms. If you have added a massage, the two together make an afternoon that earns the word restful rather than just relaxing.

A few notes on aftercare

For the rest of the day, keep things gentle. A short list, since it genuinely helps:

  • Drink plenty of water, before and after, to replace what the heat draws out.
  • Keep alcohol light or skip it, at least until the evening.
  • Let your skin breathe with loose, comfortable clothing on the way home.

The effects of a good steam tend to carry into the next morning. Sleep often comes more easily, and the loosened feeling in the shoulders lingers. It is a small investment in a long weekend that pays back over several days.

If a calm, warm half-day sounds like the right shape for your May bank holiday, we would be glad to host you. You can get in touch to book your Private Herbal Steam, and our team will help you plan an afternoon that fits the weekend you want. Come for the heat, stay for the quiet, and leave a little lighter than you came.

If you found this useful, you might also enjoy Why Couples in London Are Choosing Spa Days Over Dinner Dates.

The Treatment

Experience the Private Herbal Steam at our spa on Northumberland Avenue.

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Frequently asked questions

How long should I set aside for a Private Herbal Steam?
Allow a relaxed half-day, especially over a bank holiday. The steam itself is unhurried because the room is yours, and many guests add a massage afterwards, then sit for a while before heading back out. Arriving a little early to change and settling for a few minutes at the end makes the whole visit better.
Is the steam room private, or shared with other guests?
The Private Herbal Steam is reserved for you alone in our Sen Space. There is no sharing the room with strangers, which is why it feels so different from a public sauna. You set the pace, step out to cool whenever you like, and return when you are ready.
How do I get to Thai Square Spa for a bank holiday visit?
We are at 25 Northumberland Avenue, a short walk from Trafalgar Square, Embankment and Charing Cross. It is an easy reach across central London, which makes it a simple plan for the long weekend without needing a train out of town. Get in touch ahead of your visit to secure your preferred time.

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