Half distance · 12 September 2027
IRONMAN 70.3 Belgrade
Belgrade, Serbia
The race at a glance
- Circuit
- IRONMAN
- Distance
- Middle distance
- Terrain
- Road
- Swim
- 1.9 km
- Bike
- 90 km
- Run
- 21.1 km
- Date
- 12 Sept 2027
- Registration
- Opening soon
- Swim venue
- Lake
- Average water temperature
- 23 °C
- Bike profile
- Flat
- Run profile
- Flat
- High air temperature
- 27 °C
- Low air temperature
- 14 °C
- Altitude
- 89 m
- Swim start
- Rolling start
Edition history
| 2026 | 13 Sept 2026 | Held |
|---|---|---|
| 2025 | 21 Sept 2025 | Held |
| 2024 | 15 Sept 2024 | Held |
How the day is laid out
The swim is held in a lake. 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 swim uses a rolling start: athletes enter the water a few at a time. The water is usually around 23 °C at this time of year.
The bike course is flat.
The run course is flat.
Typical temperatures for the month run from 14 to 27 °C.
September weather in Belgrade changes from one year to the next
The 2027 race is on 12 September; on 28 October 2026, ironman.com showed registration as opening soon. Its course page records very different race days: air from 18 to 33 °C in 2023, 9 to 19 °C in 2024 and 13 to 30 °C in 2025. Sava Lake was measured at 23 °C in 2024 and 2025. ironman.com describes the two-loop bike, through the city and over the Ada Bridge, as almost flat, and the run around the lake as flat. Pack for a hot day and for a cold one.
Source: ironman.com, read on 28 October 2026.
Against the calendar
Where this race sits among the others
Ranks are computed across every race of the same distance.
Average water temperature
23 °C · median 21 °C
The 48th warmest of the 128 middle-distance races with a figure, across every circuit.
High air temperature
27 °C · median 25 °C
The 61st hottest of the 152 middle-distance races with a figure, across every circuit.
43
races of this distance pair a flat bike with a flat run, out of 159. 53 share the bike profile alone.
45
races across every distance fall in September, out of 354.
160
races are held in Europe. 28 of them in the same month as this one.
Questions about this race
- When is IRONMAN 70.3 Belgrade 2027?
- IRONMAN 70.3 Belgrade is held on 12 September 2027 in Belgrade, Serbia. Registration has not opened yet.
- Is a wetsuit allowed at IRONMAN 70.3 Belgrade?
- Most likely. The average water temperature is 23 °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.
Where to stay
Hotels and rentals around the race venue, for the nights around race day.
Suggested stay: 10 Sept 2027 to 13 Sept 2027
The map is provided by Stay22. Bookings are made with the provider.
Races of the same distance in the same region
- Challenge Sanremo
Sanremo, Italy
- Date
- 4 Oct 2026
- Distance
- Middle
- Country
- IT
- IRONMAN 70.3 Versailles
Versailles, France
- Date
- 11 Oct 2026
- Distance
- Middle
- Country
- FR
- Challenge Barcelona
Barcelona, Spain
- Date
- 25 Oct 2026
- Distance
- Middle
- Country
- ES
- IRONMAN 70.3 Costa Navarino, Peloponnese, Greece
Peloponnese, Greece
- Date
- 25 Oct 2026
- Distance
- Middle
- Country
- GR
- IRONMAN 70.3 Türkiye
Belek, Türkiye
- Date
- 1 Nov 2026
- Distance
- Middle
- Country
- TR
- IRONMAN 70.3 Vilamoura-Algarve
Vilamoura, Portugal
- Date
- 3 Apr 2027
- Distance
- Middle
- Country
- PT
- Greek Hero XTRI Solo Point Five
Ipsos, Greece
- Date
- 10 Apr 2027
- Distance
- Middle, extreme
- Country
- GR
- IRONMAN 70.3 Valencia
Valencia, Spain
- Date
- 18 Apr 2027
- Distance
- Middle
- Country
- ES
Entries are handled by the organiser
Registration and the athlete guide are on the official race page.