Black Sea swim
Settle into the sea.
Find your rhythm before you push, and sight often in open water.
Settle by 300 m. Sight early.
Race Finder IRONMAN 70.3 Mamaia Constanța.
Race Intelligence · Mamaia, Romania
IRONMAN 70.3 Mamaia Constanța.
Race Mamaia on your terms.
A beach in central Mamaia on the Black Sea.
- Race day
- 26 Sept 2027
- Course
- Swim 1.9 km · Bike 90 km · Run 21.1 km
- Historical air
- 13–24°C
Your day in Mamaia
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 Mamaia could look like.
The course behind your race
Fast courses punish an eager bike.
A fast coastal course makes it easy to ride above plan. Holding back on the bike is what makes the waterside run quick.
First half
Cap the fast opening.
Fast roads invite a hard start. Hold your power ceiling and fuel early.
Cap opening power. Fuel early.
Second half
Ride the wind by effort.
On an exposed coast, let speed change with the wind and keep power steady.
Hold effort into the wind. Finish nutrition before T2.
First half
Settle beside the water.
Use the opening kilometres to settle before deciding pace.
Control the first aid station. Keep the opening easy.
Finish
Earn the fast finish.
Progress only once form has held.
Check posture. Choose the last move late.
What to check in race week
Forecast statusToo early for a forecast
A race-day forecast is not meaningful yet; check back closer to the event.
- Temperature
- 13.2–24.4°CDew point centred on 11.4°C
- Wind and gusts
- 16.5 km/hGusts up to 46.4 km/hPrevailing direction NNE
- Rain likelihood
- Up to 40%Wet-surface uncertainty retained
Historical baseline, 2019–2025 · Open-Meteo historical archive · Updated 2026-10-27.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 Mamaia
Build the legs.
Practise the decisions.
A finish range gives you something to work towards. The preparation is specific to this race: the athlete can settle in open sea water and hold a disciplined effort on a fast, exposed coastal bike.
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 Mamaia.
Explore coachingTrisutto certified80/20 Endurance certifiedBrett Sutton’s Coach the Coach programme
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Method
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