You do have to make adaptations to your equipment and technique when the roads get wet. Here's our guide to staying safe in foul weather.
Before setting off, it's a good idea to run lower air pressure in your tyres - this helps increase the contact patch with the road and maximise the grip available. We recommend roughly 10-20psi lower than the pressure you would use in dry conditions. Experimenting with different tread types can work too, but avoid using brand new tyres in the wet. Having lights on your bike is always a good idea, but especially when rain reduces visibility.
On the road, make sure you give yourself plenty of time to brake before corners, and avoid leaning the bike excessively through the bend - even if you know the road well, there might not be as much grip in the wet. Also keep an eye out for potential hazards like painted road markings, leaves and oil.