IRONMAN 70.3 WeymouthTraining Plan & Race Guide 2026
Weymouth, United KingdomSeptember 20, 202670.3 mi — Half Distance2 min readPublished July 13, 2026
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01·Course Characteristics
The measure of Weymouth 70.3
A rolling, technical bike leg through the Dorset hills paired with highly variable, exposed coastal weather demands robust pacing before transitioning to a flat but windy seafront run.
Bike gain · rolling countryside · technical descents
Difficulty
6 / 10
A demanding, rolling 1,043 m bike leg and unpredictable coastal winds offset an otherwise flat, spectator-friendly run course.
There's still hope!
Only 9 weeks to go — but it's not too late.
The ideal build for this course is 16 weeks, and you have 9. 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.
A single-loop, clockwise swim in the protected waters of Weymouth Bay with a rolling beach start. Though typically sheltered, easterly winds can create a challenging swell and choppy conditions.
02
Bike
Dorset Countryside Loop
Dorset Countryside
DISTANCE
90 km
LOOPS
1
ELEVATION
1,043 m
TERRAIN
Rolling hills
SURFACE
UK country tarmac
WIND
Moderate on ridges
An undulating, single-loop anti-clockwise course through rural Dorset featuring heavy tarmac and technical, narrow descents. Key challenges include the steep climb up Revels and Gales Hill, averaging a 9.8% gradient over 1.3 km.
03
Run
The Esplanade Promenade
Weymouth Coastal Esplanade
DISTANCE
21.1 km
LOOPS
2
ELEVATION
24 m
SURFACE
Paved promenade
SHADE
None
PEAK TEMP
18°C
A flat, multi-lap run starting from Lodmoor Country Park and tracing the paved seafront past the harbor. While flat and highly spectator-friendly, it features zero shade and is completely exposed to coastal winds.
03·AVG beginners' Training Timeline
From zero to the finish line
16 weeks
This 16-week plan is specifically tailored to balance the rolling, strength-demanding bike course in Dorset with the flat, wind-exposed run. It transitions from general aerobic capacity to heavy hill-strength intervals, ensuring you arrive with the specific power and resilience required for Weymouth.
Today · WK 0Race Day
WK 1–4
Aerobic Foundation
Establish baseline aerobic endurance and adapt to cool open-water swim conditions.
WK 5–8
Strength & Hill Capacity
Build leg strength and climbing power to manage the 1,043 m of rolling Dorset hills.
WK 9–13
Race-Specific Simulation
Develop high-strength bike efforts and pacing into headwind-affected flat run simulations.
WK 14–16
Taper & Strategy
Reduce volume to shed fatigue while sharpening race-day transitions and execution strategy.
Adapts to your fitness, schedule & recovery every week.
Prepare for variable coastal conditions with air temperatures peaking around 18°C. The seafront run lacks shade, so rely on a visor, sunglasses, and technical apparel to manage wind chill and solar exposure.
Fuel & hydration
Target 60-90 grams of carbohydrates per hour on the bike to fuel for the constant rolling climbs. Since run aid stations may operate cup-free due to sustainability initiatives, carry a reusable, collapsible flask.
Pacing
Ride conservatively on the undulating Dorset hills, saving energy on the steep 9.8% Revels and Gales Hill climb. Establish a steady, high-cadence rhythm early on the flat run, remaining mindful of headwinds along the coast.
Gear & logistics
Bring a full wetsuit for the 16-18°C Weymouth Bay waters. Utilize a mid-depth front wheel (40-50mm) to maintain stability in variable coastal crosswinds, and transition quickly at the unified Lodmoor Country Park transition.
Frequently Asked Questions
What is the water temperature and wetsuit policy for the IRONMAN 70.3 Weymouth swim?
The average water temperature in Weymouth Bay typically ranges from 16°C to 18°C (61°F to 64°F) during late September. Wetsuits are mandatory if the water temperature drops below 16°C and are highly recommended otherwise to ensure you stay warm and buoyant during the 1.2-mile, single-loop swim.
How hard is the IRONMAN 70.3 Weymouth bike course?
The single-loop, 56-mile bike course is moderately challenging, featuring approximately 1,043 meters (3,422 feet) of total elevation gain through the rolling Dorset countryside. You will face steep sections like Revels/Gales Hill, which averages a 9.8% gradient for 0.8 miles, along with narrow, technical descents that can become slick and heavy if it rains.
Is the IRONMAN 70.3 Weymouth run course flat?
Yes, the 13.1-mile run course is entirely flat with only about 24 meters (79 feet) of total elevation gain as you complete laps along Weymouth's paved coastal esplanade. However, the course offers virtually zero shade and is highly exposed to sea breezes, which can create a physically and mentally demanding headwind.
Where are transitions T1 and T2 located for IRONMAN 70.3 Weymouth?
This race features a single, unified transition area for both T1 and T2 located at Lodmoor Country Park. This convenient setup is situated just 250 meters from the swim exit, making your logistics simple and straightforward on race day.
What special nutrition rules should I prepare for at IRONMAN 70.3 Weymouth?
While aid stations are fully stocked with water, sports drinks, gels, and bars, Weymouth's commitment to sustainability means some run aid stations may operate cup-free. You should plan to carry reusable, collapsible cups or flasks on the run to ensure you can easily take in fluids alongside your bike hydration strategy.
Your Personalized Plan
Stop guessing your intervals. Train for this course.
FE26 builds your plan around your Strava data, your real schedule, and the exact demands of IRONMAN 70.3 Weymouth — then adapts every week to how you actually perform.
