Race Information



The organiser monitors the water temperature throughout race week. It currently stands (31.07.2018) at 21.3 degrees Celsius.

For safety reasons, London Triathlon is a wetsuit compulsory event for water temperatures up to 25 degrees Celsius. However should the water temperature on the day exceed 25 degrees Celsius the use of a wetsuit is not permitted. In this scenario the organisers will confirm that it is safe to proceed with the swim, but it will be mandatory for all competitors to swim with a tow float attached. A limited number of Tow floats will be available from the Swim Safety Team. These will be issued at the dockside and must be returned at the swim out to the Swim Safety Team. Alternatively any individuals wishing to guarantee use of their own personal tow float should contact our official swimwear partner Zone3 who have alternatives to purchase or rent.

Please note the organisers will prevent any individual entering the water without a tow float, if it is deemed to be a tow float only swim.

Purchase online 

You can purchase your own tow float from using our exclusive offer from Zone3, RRP £25. Please more info here. You can also use discount code ‘LONDON20’ for any other last minute purchases you need for race day. Please enter this discount code at the point of checkout, when prompted.

Hire on the day 

Hiring a tow float on the day will cost £25, £5 of which will be refunded. You can return the tow float after your race to the Zone3 tent or choose to keep it. Please note, limited stock of tow-floats will be available for hire from the Zone3 tent on race day.

Please note the organisers reserve the right to prevent any individual entering the water without a tow float, if it is deemed to be a tow float only swim.


Blue-green algae is a natural occurrence influenced by weather patterns and can appear or dissipate overnight. When it appears at elevated levels it can make the water unsafe to swim in. Our Swim Safety Team are monitoring the level of blue green algae in the Royal Victoria Dock. Any decision as to whether it is safe to swim will be based on the World Health Organisation guidelines for Blue Green Algae. 

If the water quality or temperature is deemed to be unsafe for event conditions the swim will be cancelled and the event will proceed, per the entry terms and conditions, as a bike-run format, and competitors will not be entitled to receive any refund of the entry fee paid. The organisers will outline the format information and logistics as soon as possible after the decision to cancel the swim has occurred.



The 2018 AJ Bell London Triathlon Race Information is your complete guide to race weekend. In it you will find, directions on how to get there, rules and regulations, as well as wave times. Please make sure you read it carefully prior to the event weekend and if you have any further questions please don’t hesitate to contact our Customer Services team.


Your wave times can be found via the button below. You can search for your name using Crtl+F. The time of your wave is determined by the distance and wave type you chose at registration. Please note wave times cannot be changed at this stage. If you have any other questions or queries regarding your wave please email our Customer Services team. The timetable of waves can be found below.

*Please remember race packs are not being sent out in 2018 and will instead be collected on the day at Race Pack pick-up. 




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