Frequently Asked Questions (FAQ)

What is TEMPA?

The UK's only sauna bus: a wood-fired sauna and cold plunge on the shore of Bray Lake, between Maidenhead and Windsor. Open Saturdays and Sundays, 8:30am to 4pm.

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How long are sessions and what do they cost?

30, 60 or 90 minutes, from £10, with the sauna and cold plunge included. See all prices.

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Do I need to book?

Yes, always. Every session is booked online in advance, and sessions are capped at 8 people.

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What should I bring?

Swimwear, two towels (one to sit on), a water bottle and sliders. Leave valuables at home or in the car; phones stay out of the sauna.

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I've never done this. What happens?

Sit in the heat for up to 15 minutes, cool off in the cold plunge, and repeat. Go slowly: start with short rounds, let your body warm up naturally after the cold, and take a break whenever you need one.

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Can I swim in the lake?

You can take a dip in the lake from 8:30am to 10am as part of your booking. Longer lake swims are run separately by Bray Lake Watersports. It's a working watersports centre, so please keep an eye out for other lake users.

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Is there an age limit?

Sessions are for over-16s, and under-18s need to come with an adult.

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Who should check with a GP first?

If you're pregnant, have a heart or circulation condition, take medication, or aren't sure about heat, please check with your GP before booking.

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How do I cancel or reschedule?

Open sessions: non-refundable, but you can reschedule once if you ask more than 48 hours before.

Private hire: full refund (minus a 2.5% bank fee) if you cancel more than 48 hours before; after that it's non-refundable.

Group bookings: refund (minus 2.5%) if you cancel more than 14 days before; after that it's non-refundable, though we may be able to reschedule.

Full details are in our Terms.