70.3

IRONMAN 70.3 Poznan

Sunday, 30 August 2026

IRONMAN 70.3 Poznan is a fast, mostly flat day—1934 m in freshwater, a 90.8 km flat/fast bike, then a 21.2 km flat run—where disciplined fueling in moderate air and a steady W wind will decide your pace.

· 11 days to go
Air
14–24°
typical
Wind
4.5 W
prevailing
Water
typical — confirm
Bike climb
+163 m
Race-day forecast — 11 days outupdated 6h ago
14–22°
temp
8 km/h
wind S
27%
rain chance
1.2 mm
rain total
05:00
☁️
14°
6 SE
☂ 19%
06:00
☁️
14°
7 SE
☂ 19%
07:00
☁️
15°
7 SE
☂ 20%
08:00
☁️
15°
7 S
☂ 20%
09:00
☁️
16°
7 S
☂ 21%
10:00
☁️
18°
7 S
☂ 21%
11:00
☁️
19°
7 S
☂ 22%
12:00
☁️
21°
7 SW
☂ 23%
13:00
☁️
22°
8 SW
☂ 23%
14:00
☁️
22°
8 SW
☂ 24%
15:00
☁️
22°
8 SW
☂ 25%
16:00
22°
7 SW
☂ 25%
17:00
21°
6 SW
☂ 26%
18:00
🌤️
20°
5 SW
☂ 27%
19:00
🌤️
19°
5 SW
☂ 27%
20:00
🌤️
18°
4 SW
☂ 27%
21:00
🌦️
17°
4 SW
☂ 27%
Sunrise 06:00 · Sunset 19:45 · UV max 1 · gusts to 26 km/h
Actual forecast for this race date — refreshed daily as it approaches. The chips above are the 10-year typical.
Fueling — per hour
early outlook · 11 days out
90 g
carbs
750 mg
sodium
650 ml
fluid
  • 👍 Conditions are kind — the 650 ml/h fluid, 750 mg/h sodium and 90 g/h carbs baseline should hold. Fine-tune to your own thirst and sweat rate.
Based on the race-day forecast (feels-like up to ~22°) — sharpens as the race nears. Baseline for a ~5.5 h finish, 70 kg athlete. Scale to your own body mass and sweat rate.

Typical 10-year conditions, not a forecast. Water temperature and the wetsuit ruling are set on race morning — check the IRONMAN race guide →

Worlds qualification — slots TBAsee who qualified →
0 km45 km91 km97 m
90.8 km · +163 m climbing
T1 — swim to bike

Think “transitions first”: as you come out of the water, get calm and spend a few seconds checking your kit—shoes on, helmet secured, any pre-bike drink within reach, and everything where you want it. During T1, keep it efficient: hydrate, rack smart, and remount quickly without rushing your setup. In the first minutes of the bike, build gradually—settle into a steady cadence and breathing before you lock in your target power/speed.

During the bike

The bike is 90.8 km with about 163 m of total elevation—flat/fast—so it’s built for consistent, efficient output rather than big surges. With wind around 4.5 m/s from the W, expect a noticeable cross/head component at times; keep your aero position stable and make smooth steering corrections so you don’t lose power fighting the bike. Fuel and drink to the planned rate: target 90 g carbs per hour, 750 mg sodium per hour, and 650 ml fluid per hour, taking it consistently rather than waiting for thirst. On a flat course, it’s easy to ride too “hot” early—stay disciplined, then keep the rhythm strong through the middle and late sections so the run comes out feeling controlled.

Closing notes

Your key bike job is staying steady in the wind and hitting the full fueling plan—this is what protects your 21.2 km run.

Results by year

Every edition of this race in our database. The course and conditions can shift year to year — see who qualified and the World Championship slot rolldown for each.

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Weather is a 10-year climatology (typical, not a forecast). Course tracks are approximate, derived for planning — verify against the official course. Maps © OpenStreetMap. Not affiliated with or endorsed by the IRONMAN Group.