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Triathlon Atlas

Half distance · 6 June 2027

IRONMAN 70.3 Switzerland

Also known as IRONMAN 70.3 Rapperswil

Rapperswil-Jona, Switzerland

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
Sold out
Swim venue
Lake
Average water temperature
17 °C
Bike profile
Hilly
Bike elevation gain
1,100 m
Run profile
Rolling
Run elevation gain
71 m
High air temperature
24 °C
Low air temperature
12 °C
Overall cut-off
7 h 30 min
Altitude
409 m
First edition
2007
Swim start
Rolling start

Edition history

20267 Jun 2026Held
20251 Jun 2025Held
20242 Jun 2024Held
202311 Jun 2023Held
202219 Jun 2022Held
20218 Aug 2021Held
20192 Jun 2019Held
201810 Jun 2018Held
201711 Jun 2017Held

How the day is laid out

The swim is held in a lake. An average of 17 °C sits in the range where a wetsuit is both allowed and worth wearing for nearly everyone.

The bike leg is labelled hilly.

The run is labelled rolling.

A hilly bike ahead of a rolling run puts the day's decision early: what you spend on the climbs is what the run will not have.

The overall cut-off for this race is 7 h 30.

Expect air between 12 °C and 24 °C on race day. A spread of 12 degrees across the day matters as much as the peak, because what you wear at the swim exit is rarely what you want at the far end of the bike.

Intermediate cut-offs and a lake measured at 14 °C

Besides the final cut-off of 7 h 30, the organiser publishes 1 h 10 for the swim and 5 h 15 for swim, transition and bike. There are further checkpoints on the second bike lap and on the run, set as clock times. The bike is two loops of climbs and descents, and the run goes through the medieval streets of Rapperswil-Jona, along the lake and up the stairway the organiser calls the "stairway to heaven".

The Obersee was measured at 14 °C in 2024, 18 °C in 2025 and 17 °C in 2026. Below 16 °C, the 2026 IRONMAN Competition Rules make a wetsuit compulsory for all athletes.

Source: ironman.com, read on 27 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

    17 °C · median 21 °C

    The 8th coldest 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

    1100 m · median 569 m

    The 10th hilliest of the 105 middle-distance races with a figure, across every circuit.

13

races of this distance pair a hilly bike with a rolling run, out of 159. 29 share the bike profile alone.

58

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

160

races are held in Europe. 40 of them in the same month as this one.

Questions about this race

When is IRONMAN 70.3 Rapperswil 2027?
IRONMAN 70.3 Rapperswil is held on 6 June 2027 in Rapperswil-Jona, Switzerland. The race is sold out.
Is a wetsuit allowed at IRONMAN 70.3 Rapperswil?
Most likely. The average water temperature is 17 °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 Rapperswil?
The course closes 7 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 Rapperswil?
The bike course climbs about 1100 m, the 10th hilliest of 105 half-distance races with a figure. The bike is labelled hilly 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