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Triathlon Atlas

Full distance · 23 October 2027

IRONMAN Portugal-Cascais

Cascais, Portugal

The race at a glance

Official race website
Circuit
IRONMAN
Distance
Full distance
Terrain
Road
Swim
3.8 km
Bike
180 km
Run
42.2 km
Date
23 Oct 2027
Registration
Sold out
Swim venue
Bay
Average water temperature
17 °C
Bike profile
Hilly
Bike elevation gain
1,400 m
Run profile
Rolling
Run elevation gain
325 m
High air temperature
25 °C
Low air temperature
18 °C
Overall cut-off
16 h 15 min
Altitude
8 m
First edition
2021
Swim start
Rolling start

Edition history

202617 Oct 2026Held
202518 Oct 2025Held
202419 Oct 2024Held
202321 Oct 2023Held
202215 Oct 2022Held
202123 Oct 2021Held

How the day is laid out

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

The organiser publishes 3.8 km of swimming, 180 km on the bike and 42.2 km of running.

The swim uses a rolling start: athletes enter the water a few at a time. The water is usually around 17 °C at this time of year.

The bike course is hilly, with about 1,400 m of climbing.

The run course is rolling, with about 325 m of climbing.

Typical temperatures for the month run from 18 to 25 °C. The overall cut-off is 16 h 15 min.

The race was first held in 2021.

A long run to T1, then wind on the Guincho road

The swim is a single 3.8 km loop in Cascais bay, from Praia da Ribeira to the fortress at the Clube Naval. The organiser gives 17 to 19 °C for the water in October, and the course page lists 17 °C measured in 2023 and 18 °C in 2024 and 2025, below the 24.5 °C up to which IRONMAN allows wetsuits for age-group athletes.

T1 is at the Hipódromo, 600 m from the swim exit. The bike makes two loops past Guincho beach and the Serra de Sintra. The run makes three loops from Cascais along the Guincho road to Cabo Raso, a course the organiser calls challenging on a windy day.

The IRONMAN 70.3 Portugal-Cascais is held on the same day.

Source: ironman.com, read on 19 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 22 °C

    The 2nd coldest of the 48 full-distance races with a figure, across every circuit.

  • High air temperature

    25 °C · median 25 °C

    The 24th coolest of the 52 full-distance races with a figure, across every circuit.

  • Bike elevation gain

    1400 m · median 1130 m

    The 18th hilliest of the 43 full-distance races with a figure, across every circuit.

7

races of this distance pair a hilly bike with a rolling run, out of 55. 14 share the bike profile alone.

32

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

160

races are held in Europe. 14 of them in the same month as this one.

Questions about this race

When is IRONMAN Portugal-Cascais 2027?
IRONMAN Portugal-Cascais is held on 23 October 2027 in Cascais, Portugal. The race is sold out.
Is a wetsuit allowed at IRONMAN Portugal-Cascais?
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 Portugal-Cascais?
The course closes 16 h 15 min after the start. Intermediate cut-offs after the swim and the bike are in the athlete guide.
How hard is IRONMAN Portugal-Cascais?
The bike course climbs about 1400 m, the 18th hilliest of 43 full-distance races with a figure. The bike is labelled hilly and the run rolling. Expect highs of about 25 °C on race day.

Where to stay

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

Suggested stay: 21 Oct 2027 to 24 Oct 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