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Estoril, Cascais

IRONMAN 70.3 Cascais

Cascais, PortugalHalf distance17 October 2026

Photo: kenward, CC BY 2.0 via Wikimedia Commons

4

days to race day

Checked against the organiser's own race page.

Cascais race week and bags, in the app.

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IRONMAN 70.3 Cascais at a glance

Swim

1.9 km

Cascais Bay, Ocean, 1 lap

Bike

90 km

Rolling, 1 lap

Run

21.1 km

Rolling, 2 laps

Race week, the last three years

Sea

19°C

17°C to 20°C in race week

Air

22°C

17°C at night

Rain

57%

of race-week days

Wind

24

km/h gusts on a typical day

Date
17 October 2026
Where
Cascais, Portugal
Distance
Half, 1.9 / 90 / 21.1 km
Official page
ironman.com/im703-cascais

Course from the organiser's course page. Weather: the seven days around the race date in 2023, 2024, 2025, averaged (Open-Meteo, ERA5). Sea is the sea off the town, not a reading of the swim. The water temperature that counts is the one officials measure on race morning.

IRONMAN 70.3 Cascais race week guide

Race week in three parts, the same three the Taperly app uses. Times and deadlines come from the athlete guide.

  1. 10 October 2026 to 15 October 2026

    Race week

    Everything that still has time to go wrong, while there is still time to fix it. Nothing you train this week makes you faster on the day, but plenty of it can make you slower.

    Must do: Read the athlete guide properly, Check your race entry and category are right, Final equipment check: tyres, brakes, gears, cleats, Arrange care for kids or pets.

  2. On site, by 16 October 2026

    At the race

    A long day of small errands in a town you do not know, and then an early night. Do them in an order you decided in advance.

    Must do: Athlete check-in, Timing chip somewhere you cannot leave without it.

  3. 17 October 2026

    Race day

    If the week went well, this is only a list of things to pick up and put down. It ends when the horn goes, because from there nobody is holding a phone.

    Must do: Timing chip on, Race number, Bike on your own rack number.

The full race week checklist

Taperly plan with the prep phases and what is left

The same race week, planned day by day in the app.

Download on theApp Store

Packing list for Cascais

What goes in each bag. The full list, to tick off bag by bag, is in the app.

IRONMAN 70.3 Cascais: questions

When is IRONMAN 70.3 Cascais?

IRONMAN 70.3 Cascais is on 17 October 2026, in Cascais, Portugal. The date is checked against the organiser's own race page.

What is the water temperature at IRONMAN 70.3 Cascais?

The sea off Cascais has been around 19°C in race week (17°C to 20°C over 2023, 2024, 2025). Whether wetsuits are allowed is decided on race morning from the measured water temperature.

What is the IRONMAN 70.3 Cascais course like?

Swim 1.9 km, Cascais Bay, Ocean, 1 lap. Bike 90 km, Rolling, 1 lap. Run 21.1 km, Rolling, 2 laps. Read from the organiser's course page.

What is the weather like at IRONMAN 70.3 Cascais?

In race week it has been 17°C at night and 22°C in the day, with rain on 57% of days and gusts around 24 km/h (2023, 2024, 2025).

What should I pack for IRONMAN 70.3 Cascais?

Everything sorted by the bag it goes in: what you wear, the morning bag, the bike bag and the run bag. The full list, with what changes for Cascais, is free in the Taperly app.

Racing something else?

Other races this season