Ribeira Beach · the swim
Leave room for the uphill walk to T1.
The swim stays in the protected bay. Sight regularly and choose your own opening effort.
Seed honestly. Settle into rhythm.
Race Finder IRONMAN 70.3 Portugal-Cascais.
Race Intelligence · Cascais, Portugal
IRONMAN 70.3 Portugal-Cascais.
Race Cascais on your terms.
The latest published 2026 layout starts in Cascais Bay before an exposed coastal bike and run. The next 70.3 is confirmed for 23 October 2027; check its own course guide before treating those turns as current.
Cascais, Portugal, a coastal town with white-washed buildings and a busy harbor.
- Race day
- 23 Oct 2027
- Course
- Swim 1.9 km · Bike 90 km · Run 21.1 km
- Historical air
- 15–21°C
Your day in Cascais
What could you race?
I’m Tom, the coach behind Sense Endurance Coaching. Tell me where you are now and I’ll show you what a strong day in Cascais could look like.
The course behind your race
Keep the coast from choosing your effort.
The bike mixes rolling roads with the Estoril circuit and a turn in Lisbon. Save enough control for the coast road when you return on foot.
Guincho and Sintra-Cascais · opening bike
Let the rollers change your speed.
The exposed Guincho road and Sintra-Cascais park roads are where a headwind can wreck an even effort. Cap power, not speed.
Ride by watts, not by speed. Fuel early.
Estoril and Lisbon · remainder of the bike
Keep fuelling beyond the circuit.
On the return past Estoril, resist turning the final bike kilometres into a chase for average speed. Eat the last planned fuel and get off ready to hold form through two coastal run laps.
Stay aero. Finish planned nutrition.
Towards Cabo Raso · first run loop
Find an effort that works in both directions.
The wind on the Cascais coast does not care about your target split. Take the first run loop by effort and form, then decide whether the second deserves a push.
Easy first aid station. Check posture.
Back along the coast · second loop
Build only if the first loop stayed controlled.
Only progress once the first loop has held together against the wind.
Stay tall. Choose the last move late.
What to check in race week
When the 2027 athlete guide is available, confirm the swim exit, transition, loop counts and bike elevation before planning. Check wind and adjust effort only for exposed sections shown on the final route.
Forecast statusToo early for a forecast
A race-day forecast is not meaningful yet; check back closer to the event.
- Temperature
- 15.1–20.5°CDew point centred on 15.3°C
- Wind and gusts
- 15.7 km/hGusts up to 59.0 km/hPrevailing direction SW
- Rain likelihood
- Up to 100%Wet-surface uncertainty retained
Historical baseline, 2019–2025 · Open-Meteo historical archive · Updated 2026-10-20.Historical comparison only. This is not a forecast for 2027.
Make your finish prediction and I can send this plan to you in race week.
Your plan, in race week
Prepare for Cascais
Build the legs.
Practise the decisions.
A finish range gives you something to work towards. The preparation is specific to this race: Training has to make rolling-road power controlled and a two-loop coastal run sustainable after it.
I’m Tom. With Sense Endurance Coaching, I’ll build that preparation around your life, follow how you respond and adjust the work as you get closer to Cascais.
Explore coachingTrisutto certified80/20 Endurance certifiedBrett Sutton’s Coach the Coach programme
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