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IRONMAN 70.3 Phu QuocTraining Plan & Race Guide 2026

Phu Quoc, VietnamNovember 1, 202670.3 mi — Half Distance2 min readPublished July 13, 2026
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01·Course Characteristics

The heat of Phu Quoc

A blisteringly fast, flat course that tests thermal endurance more than muscular strength. High tropical humidity and direct sun on the run require precise pacing and a strict hydration strategy to avoid overheating.

Climate
32°C
Peak air temperature · water 28-30°C · November dry season transition
Conditions
Humid
Over 75% humidity · intense solar exposure · rising sea breezes
Elevation
172 m
Bike gain · flat coastal terrain · 16 m run elevation
Difficulty
6.5 / 10
Flat topography means high speed, but extreme humidity, 32°C heat, and a non-wetsuit swim elevate the physiological strain significantly.

There's still hope!

Only 15 weeks to go — but it's not too late.

The ideal build for this course is 16 weeks, and you have 15. We'll compress the essentials into your remaining time, prioritizing the demands that matter most on this course to get you to the finish line.

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02·Course by Section

Swim · Bike · Run — the data & the tactics

01
Swim

Gulf of Thailand Loop

Three Coconut Trees Beach
DISTANCE
1.9 km
FORMAT
Single-loop rectangle
WATER
Saltwater
TEMP
28-30°C
WETSUIT
Strictly non-wetsuit
START
Rolling

A single-loop rectangular swim starting and finishing at Three Coconut Trees Beach. The exceptionally warm, highly saline water provides excellent buoyancy, and November conditions typically offer calm seas.

02
Bike

Southern Island Expressway

Phu Quoc Marina Coastal Loops
DISTANCE
90 km
LOOPS
2 loops
ELEVATION
172 m
SURFACE
Smooth asphalt
WIND
Rising sea breeze

A flat, fast, two-loop route traversing the southern half of the island on well-paved roads. The course is entirely exposed to the elements, meaning athletes will battle rising coastal crosswinds and intense heat on the second lap.

03
Run

The Coastal Furnace

Phu Quoc Marina Beachfront
DISTANCE
21.1 km
LOOPS
2 loops
ELEVATION
16 m
SHADE
Almost zero
PEAK TEMP
30-32°C

A flat, two-loop coastal run that presents a grueling test of thermal regulation. With virtually no shade, you will run under direct tropical sunlight as air temperatures peak at 32°C.

03·AVG beginners' Training Timeline

From zero to the finish line

16 weeks

This 16-week plan focuses on building sustained aerobic endurance to withstand the relentless heat and humidity of Phu Quoc. Since the course is entirely flat, we front-load postural endurance for the bike and back-load targeted heat-adaptation protocols so you arrive in Vietnam fully prepared to handle the thermal demands.

Today · WK 0Race Day
WK 1–5

Aerobic Base & Heat Prep

Build a robust aerobic engine and initial heat tolerance to prepare for tropical humidity.

WK 6–10

Sustained Aero Power

Develop muscular endurance in the aero position for the flat, fast bike course.

WK 11–14

Specific Heat Build

Incorporate critical heat-acclimatization protocols alongside race-pace brick workouts.

WK 15–16

Taper & Hydration Strategy

Reduce training volume while locking in nutrition, pacing, and core temperature strategies.

Adapts to your fitness, schedule & recovery every week.

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04·Race-Day Execution

Controlled aggression, start to finish

Weather & cooling

With humidity exceeding 75% and temperatures reaching 32°C, utilize every single aid station to douse your head and body with cold water to lower your core temperature. Do not wait until you feel hot to start your cooling protocol.

Fuel & hydration

Target high sweat replacement with 750 to 1000 ml of fluid and 500 to 1000 mg of sodium per hour. Adjust this based on your personal sweat testing, and prioritize high-concentration electrolyte drinks on the bike.

Pacing

Start the bike conservatively, as the first loop will feel deceptively easy before the midday heat and sea breezes rise. Cap your power on the flat bike course to save critical matching energy for the shadeless run.

Gear & logistics

Choose a non-wetsuit swim skin for the warm saltwater and highly ventilated, white tri-clothing to reflect radiation. Book host hotels like the InterContinental or Pullman directly adjacent to the transition zone for stress-free logistics.

Frequently Asked Questions

Is the BIM Group IRONMAN 70.3 Phu Quoc swim wetsuit legal?

No, the 1.9 km swim in the Gulf of Thailand is strictly non-wetsuit legal due to very warm saltwater temperatures averaging 28°C to 30°C (82°F to 86°F). However, you will benefit from excellent natural buoyancy thanks to the high salinity of the water, and currents in November are typically very calm.

How flat is the IRONMAN 70.3 Phu Quoc bike course?

The 90 km bike course is exceptionally flat and fast, featuring a 2-loop format with a total elevation gain of only 172 to 175 meters. While the smooth, well-paved roads are designed for high speed, you must prepare for wind-blown sand near the coast and complete exposure to intense sun and rising sea breezes on the second loop.

What are the typical weather conditions for IRONMAN 70.3 Phu Quoc?

You should prepare for hot, tropical, and highly humid conditions, with humidity levels often exceeding 75%. Air temperatures range from a morning low of 23°C–26°C (73°F–79°F) to a midday peak of 30°C–32°C (86°F–90°F), which pushes the 'feels like' temperature significantly higher due to intense solar exposure.

How much elevation gain is on the IRONMAN 70.3 Phu Quoc run course?

The 21.1 km run course is highly flat, featuring an elevation gain of only about 16 meters over a 2-loop coastal route. Despite the flat terrain, the run is highly demanding because there is almost zero shade, exposing you to direct sunlight during peak daytime temperatures of 30°C to 32°C (86°F to 90°F).

Where is the best place to fly into and stay for IRONMAN 70.3 Phu Quoc?

You should fly directly into Phu Quoc International Airport (PQC), which is a convenient 10-15 minute drive from the race venue. Booking your stay at luxury host hotels like the InterContinental, Regent, or Pullman at Phu Quoc Marina allows you to walk directly to the transition zone, start line, and finish line.

Your Personalized Plan

Stop guessing your intervals. Train for this course.

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