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Triathlon Atlas

Half distance · 6 June 2027

IRONMAN 70.3 Durban

Durban, South Africa

The race at a glance

Official race website
Circuit
IRONMAN
Distance
Middle distance
Terrain
Road
Swim
1.9 km
Bike
90 km
Run
21.1 km
Date
6 Jun 2027
Registration
Open
Swim venue
Ocean
Average water temperature
22 °C
Bike profile
Rolling
Bike elevation gain
825 m
Run profile
Rolling
High air temperature
24 °C
Low air temperature
10 °C
Overall cut-off
8 h 30 min
Altitude
22 m
First edition
2015

Edition history

20267 Jun 2026Held
20251 Jun 2025Held
20242 Jun 2024Held
20234 Jun 2023Held
20222 Oct 2022Held
20216 Jun 2021Held
20192 Jun 2019Held
20183 Jun 2018Held
201718 Jun 2017Held
201619 Jun 2016Held

How the day is laid out

The swim is held in the ocean. The wetsuit call is made on race morning, against the temperature measured then.

The organiser publishes 1.9 km of swimming, 90 km on the bike and 21.1 km of running.

The water is usually around 22 °C at this time of year.

The bike course is rolling, with about 825 m of climbing.

The run course is rolling.

Typical temperatures for the month run from 10 to 24 °C. The overall cut-off is 8 h 30 min.

The race was first held in 2015.

Winter mornings, warm sea

The race is held in June, in the southern winter. On the ironman.com course page, race-day air ran from 10 to 24 °C in 2024, 10 to 28 °C in 2025 and 11 to 21 °C in 2026, while the Indian Ocean was measured at 23, 22 and 23 °C. At the start, the water is usually warmer than the air. The bike is two loops on the M4 highway north of the city, rated flat and described by ironman.com as fast and undulating; the run is three laps of the beachfront promenade.

Source: ironman.com, read on 28 October 2026. The other South African races: IRONMAN in South Africa.

Against the calendar

Where this race sits among the others

Ranks are computed across every race of the same distance.

  • Average water temperature

    22 °C · median 21 °C

    The 62nd warmest of the 128 middle-distance races with a figure, across every circuit.

  • High air temperature

    24 °C · median 25 °C

    The 58th coolest of the 152 middle-distance races with a figure, across every circuit.

  • Bike elevation gain

    825 m · median 569 m

    The 33rd hilliest of the 105 middle-distance races with a figure, across every circuit.

19

races of this distance pair a rolling bike with a rolling run, out of 159. 58 share the bike profile alone.

58

races across every distance fall in June, out of 354.

6

races are held in Africa. 1 of them in the same month as this one.

Questions about this race

When is IRONMAN 70.3 Durban 2027?
IRONMAN 70.3 Durban is held on 6 June 2027 in Durban, South Africa. Registration is open on the official race page.
Is a wetsuit allowed at IRONMAN 70.3 Durban?
Most likely. The average water temperature is 22 °C, below the 24.5 °C limit up to which wetsuits are allowed for age-group athletes. The official call is made on race morning.
What is the cut-off at IRONMAN 70.3 Durban?
The course closes 8 h 30 min after the start. Intermediate cut-offs after the swim and the bike are in the athlete guide.
How hard is IRONMAN 70.3 Durban?
The bike course climbs about 825 m, the 33rd hilliest of 105 half-distance races with a figure. The bike is labelled rolling and the run rolling. Expect highs of about 24 °C on race day.

Where to stay

Hotels and rentals around the race venue, for the nights around race day.

Suggested stay: 4 Jun 2027 to 7 Jun 2027

The map is provided by Stay22. Bookings are made with the provider.

Races of the same distance in the same region

Entries are handled by the organiser

Registration and the athlete guide are on the official race page.

Open the official race page