If you have the choice, do not come here in July. Royal Mound 9 is a good place to learn about Bahrain's summers, which are the island's real boundary condition. From June to September the air temperature rises above forty degrees, the humidity off the Gulf can reach ninety per cent, and the sun on the limestone feels like a physical weight. Local people plan their days around it, working early, sleeping through midday and emerging after sunset.
A rider has to do the same. Start before dawn, finish by ten, and avoid being on the road when the heat peaks in mid-afternoon. Carry more water than you think you need and drink it steadily, ideally with electrolytes, because sweat evaporates so quickly in the dry wind that you may not notice how much you are losing. A light, ventilated jacket is better than none, and a cooling vest worn under it makes a real difference. Tyres run hot on tarmac that can reach seventy degrees, so check pressures often.
The shamal is the other factor, a steady north-westerly that blows for days at a time in early summer and carries dust that turns the sky yellow. It reduces visibility, scours paintwork and piles sand at the edge of roads. In winter the wind turns cooler and occasionally brings rain, which makes the limestone slick, so be careful on the tarmac when the first drops fall.
The mound itself is an impressive piece of early engineering, one of more than a dozen royal tombs in the A'ali cluster, built from local limestone about four thousand years ago and designed to last. It is part of the UNESCO site, and well worth the visit in the cooler months.
Fuel and food are in Madinat Isa, a few minutes away, along with air-conditioned shopping malls that make a good place to sit out the midday heat. If you are riding in summer, treat them as part of the route.