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Race IntelligenceSingapore, Singapore

T100 Singapore

Know your day before you race it.

Enter four numbers you already train with. You get a likely finish range, target paces and watts, and how I would race this course.

Race day
11 April 2027
Swim
2 km
Bike
80 km
Run
18 km

Published route evidence. Final 2026 route pending. Checked 22 Sept 2026.

01 Race Card

Your first useful race-day range

Four current benchmarks are enough to begin. I combine them with this course and 500 plausible race days.

Your four current benchmarks
Change units
Distance unit
Weight unit
Add race contextOptional. Experience, goal and bike setup make the range more personal.
Race context
Projected field position Optional. This only compares your predicted time with your race category; it does not change your range.
Refine your range with recent resultsOptional. One recent effort or a known setup detail can make part of your range more specific.

Start with your first range. Add any details you know; they can narrow the relevant discipline, explain its uncertainty, or flag a race-day risk.

Swim evidence

Replaces the broad pool-to-open-water assumption.

Bike and equipment

These give the bike estimate more detail on mass, aerodynamics, tyres and power.

Run evidence

A recent effort, plus realistic durability and heat-acclimation answers, gives the post-bike run more context.

Race execution

Your transition experience adjusts the T1/T2 range and helps us account for wet conditions.

02 Read the course

What this course asks of you

You swim 2 km over two laps in the warm freshwater of Marina Bay, starting near the Helix Bridge, then ride 80 km across five laps of closed urban roads beginning and ending at the Singapore Grand Prix F1 Pit Building, then run 18 km over two flat laps past Marina Bay Sands, the Art Science Museum and Gardens by the Bay. On paper this is one of the tour's more manageable courses: warm reservoir swim, undulating but not severe bike, flat run. What actually decides the day is Singapore's equatorial heat and humidity, repeated five times on the bike and twice on the run rather than once. Let the course set the context for your effort.

Show distances in

Bike

80 km

Closed-road, Five Laps Starting and Ending at the Singapore Grand Prix F1 Track

Layout
5 laps
Setting
the F1 Pit Building precinct and Marina Bay's urban streets

Five laps of the F1 circuit precinct mean every pacing decision repeats five times over, with equatorial humidity building through the field.

Source: 2026 published course, 2027 course/schedule TBC per organiser

Run

18 km

Flat, Two Laps Past Marina Bay Landmarks

Layout
2 laps
Setting
Marina Bay Sands, the Art Science Museum, Gardens by the Bay and Marina Barrage

Two flat laps through Marina Bay's landmarks give an early, honest read on whatever the bike and the heat have already cost.

Source: 2026 published course, 2027 course/schedule TBC per organiser
Where these course facts come from

These facts come from the organiser’s latest published material: swim, 2026 published course, 2027 course/schedule TBC per organiser; bike, 2026 published course, 2027 course/schedule TBC per organiser; run, 2026 published course, 2027 course/schedule TBC per organiser. They describe the character of the course. They do not confirm the final 2026 route.

03 Race decisions

Where you protect your day

Each phase has one clear job. The course tells you when that job changes.

Swim

Two calm laps in warm water

  1. 0–1000 m

    Lap 1

    Settle in warm, sheltered water

    A freshwater reservoir with no current gives a controllable opening. Settle into rhythm rather than racing the first lap.

    • Settle into rhythm
    • Sight toward the Aussie exit

  2. 1000–2000 m

    Lap 2

    Repeat the same effort, not more

    The short Aussie-exit between laps is a chance to reset, not a reason to push the second lap harder.

    • Reset breathing at the exit
    • Hold the same effort as lap one

Bike

Five laps, one plan

  1. 0 km–32 km

    Laps 1-2

    Set a number all five laps can repeat

    The F1 circuit precinct's closed roads feel fast early. Set a wattage sized for five laps in rising heat, not for the first one.

    • Cap opening watts
    • Start fluid and electrolyte intake from lap one

  2. 32 km–64 km

    Laps 3-4

    Hold the number as the humidity builds

    The middle laps are where Singapore's heat and humidity start to matter more than the terrain does.

    • Hold effort over watts if the heat bites
    • Fuel on the same schedule each lap

  3. 64 km–80 km

    Lap 5

    Finish the number you set, not the one you have left

    The final lap is identical terrain in the day's building heat. Finish nutrition and fluids before T2.

    • Stay patient
    • Finish planned fluids before T2

Run

Two laps in the heat

  1. 0 km–9 km

    Lap 1

    Open controlled past the landmarks

    Marina Bay Sands and the Art Science Museum come early. Run this lap a shade easier than goal pace and use it as your heat check.

    • Hold opening pace
    • Take fluid and ice at every station

  2. 9 km–18 km

    Lap 2

    Spend what the bike and lap one left

    Passing Gardens by the Bay and Marina Barrage a second time tells you plainly what five bike laps in the heat actually cost.

    • Compare lap two to lap one honestly
    • Run the last kilometres on effort

04 Race-week review

What could change your plan

There is no useful 2026 forecast this far out. For now, use past race dates to know what you may need to manage. Closer to the race, we can decide whether the plan needs to move.

Forecast statusToo early for a forecast

A race-day forecast is not meaningful yet; check back closer to the event.

Temperature
25.2–29.9°CDew point centred on 24.5°C
Wind and gusts
8.5 km/hGusts up to 26.6 km/hPrevailing direction NNE
Rain likelihood
Up to 100%Wet-surface uncertainty retained

Historical baseline, 2019–2025 · Open-Meteo historical archive · Updated 2026-09-22.Historical comparison only. This is not a forecast for 2026.

05 Confidence

How solid is your range?

Your CSS, FTP, weight and run threshold create your first range. Add evidence where you have it and the calculation reflects more of your actual situation. Anything still unknown stays visible, so you know what to revisit before race day.

  1. Your numbersCSS · FTP · weight · run threshold
  2. This raceDistance · water type · elevation · exposure
  3. Your Race CardFinish and discipline ranges, with target paces and watts

Confidence is built from four inputs

Athlete evidence
Builds with recent open-water, bike and run efforts
Bike setup
Builds with equipment, mass, aero and tyre detail
Course evidence
Partial while the 2026 route is unconfirmed
Race-week conditions
Historical baseline until a forecast is useful
How the model works

It starts with the targets in your Race Card, then samples the parts of a T100 that vary: open-water pace, transitions, bike speed at the planned power, and the drop in run performance after the swim and bike. Repeating that calculation produces a likely range.

The current time calculation uses this race’s published distances, or standard T100 distances where none are published, with the available course headings, elevation and exposure evidence. Weather scenarios vary temperature, dew point, wind, gusts, rain and water conditions together. Unknown route detail stays visible as uncertainty rather than false precision.

The calculation estimates a plausible range of race days and shows where the uncertainty sits. Placing, exact weather and your in-the-moment decisions remain outside the range.

Confidence changes as the evidence improves. It is recalculated across four separate inputs:

  • Your evidence: consistent inputs and recent race-like swim, bike, and run results.
  • Bike setup: measured or specified aerodynamics rather than a broad prior.
  • The course: verified distance and route character, including elevation and technical sections.
  • The conditions: a current forecast is more useful than a historical comparison.

It starts low when those inputs are broad, then rises as the evidence improves. A narrower range means better information, not a guarantee.

06 Take it forward

If Singapore matters to you

Use your card to practise the decisions that matter before race day gets noisy.

Choose the support that fits what you need.

Personalised coachingTurn your Race Card into a race you can execute.I’ll help you decide what to train, what to practise and what to leave alone as the course and forecast become clearer.See coachingSelf-guided planHalf-distance training plansTraining plans for the race duration this course sits inside.See the plans

Further reading

ArticleHeat adaptation strategies for triathletesPreparation the organiser's own athlete guide dedicates a section to, for Singapore's equatorial heat and humidity.ArticleFix the first ten minutes off the bikeUseful before a two-lap run that gives an honest read on the heat and the bike alike.

Evidence

Show me the evidence

Course status: Partially verified. The organiser’s descriptions and latest published route profiles are in use. The final 2026 route is not yet confirmed. Last checked 22 Sept 2026.