Bay of Angels Swim Guide: Your Complete Ironman Nice 2025 Blueprint
Bay of Angels Swim: Complete Guide to Conquering the Ironman Nice 2025 Start
3.8 km of turquoise Mediterranean water can be your ally… or your first wall. Swimming in the Bay of Angels sounds idyllic, but this stretch of the Côte d’Azur is notorious for its blinding glare, unpredictable currents, and the Australian exit that shatters the pack. If you want to exit the water ready to crush the bike—without a redline heart rate—this guide is for you.
1. Swim Course Essentials (2025)
| Parameter | Official Value |
|---|---|
| Format | 2 laps of 1,900 m (Australian exit) |
| Start time | 06:50 (rolling start) |
| Water temperature | 22–24 °C (wetsuit almost always allowed) |
| Current | West → East · avg. 0.05 m/s |
| Waves | Ground swell < 0.5 m · wind chop if > 20 km/h |
Downloadable GPX: Train your sighting and turns before traveling: Windy GPX link (Garmin / Suunto / COROS compatible).
How to use: Garmin → Menu › Workouts › Courses › Import · COROS → app › Custom Route.
2. Start Strategy
Smart Positioning
Line up ~20 m to the right of the start arch to avoid the bottleneck at the first buoy. Local athletes crowd the center—your advantage is in clean water.
First 300 m
Start at ~85% of your Critical Swim Speed (CSS): fast enough to clear traffic without burning glycogen. Settle your breathing by the 2-minute mark.
Visual Landmarks
- Buoy 1: Old Port tower, visible to the right.
- Buoy 3: Hotel Negresco’s unmistakable pink dome.
Use tall, static landmarks—not boats or small buoys—for consistent orientation.
Australian Exit
At the end of lap one, run ~20 m up the sand, jog for 10 seconds, then dive back in. Perfect moment to adjust goggles and relax your shoulders.
3. Breathing & Sighting
| Phase | Frequency | Objective |
|---|---|---|
| Buoys 0–2 | Every 3 strokes | Stabilize rhythm, avoid swallowing water |
| Buoys 2–4 | Every 2 strokes (right side) | Monitor swell and sunrise glare |
| Every 8–10 strokes | Quick forward lift | Correct zig-zag to < 1° |
Zig-zag penalty: +100 m off course ≈ +2–3 minutes lost.
Goggle tip: With sunrise at 06:50, go mirrored or Category 3 tinted lenses.
4. Wetsuit: Yes or No?
| Temperature | Rules | Recommendation |
|---|---|---|
| > 24.5 °C | Prohibited | Tri suit + body glide on neck |
| 16–24 °C | Optional | Long-sleeve wetsuit: buoyancy + draft benefits |
| < 16 °C | Mandatory | 3–5 mm thickness |
Aero tip: Higher float = +0.5 km/h ≈ saving 3–4 watts on the bike. Don’t leave “free watts” in the water.
5. Key Swim Workouts (4 Weeks Out)
| Session | Purpose | Reference Times* |
|---|---|---|
| 6 × 400 m pull-buoy + paddles | Strength & stroke efficiency | R: 1 min / 100 m |
| Pyramid 100-200-300-200-100 | Race pace | 95–100% CSS |
| 8 × 50 m sprints from beach | Explosive start | 40″ effort / 20″ rest |
*For sub-11 h Ironman athletes; adjust to your CSS.
6. Swim Gear Checklist
- Wetsuit in perfect condition (check zippers)
- Anti-fog goggles + spare pair in T1
- Body glide for neck & underarms
- Timing chip on left ankle (outside wetsuit)
- 30 g CHO gel 10 min before start (fast absorption)
Save to your phone or tape inside your gear bag.
7. Pre & Post-Swim Nutrition
| When | What | Why |
|---|---|---|
| 90 min before | 90 g CHO + 600 mg sodium breakfast | Top off glycogen & pre-hydrate |
| 20 min before | 250 ml sports drink (4% CHO) | Prevent thirst & stabilize glucose |
| 10 min before | 30 g fast-acting gel | Energy boost for the start |
| T1 | 500 ml sports drink + 30 g CHO | Clean transition & prevent bonk |
8. FAQ
- Are fins or pull-buoys allowed on race day?
- No—only wetsuit per official water temp, plus goggles and cap.
- How can I train for lateral currents?
- Pool sessions with an ankle band simulate misalignment and force course correction.
- Is there a swim cutoff?
- Yes—2 h 20 min from last rolling start.
- Best anti-fog trick?
- DIY: baby shampoo + water, apply 5 min pre-swim, rinse lightly.
9. “Bay of Angels Swim Route”
Click below to download the official swim map (PDF) with buoy positions, current vectors, and GPS points. Perfect for visualizing the course before race day in Nice.
📥 Download Bay of Angels Swim Map (PDF)
Not using Garmin/COROS? Convert for free to TCX at gpsbabel.org.
Direct link: Windy route.
10. Next in the Series
| Edition | Topic | Date |
|---|---|---|
| #3 | Aero tuning on Col d’Eze | 19–23 Aug |
| #4 | Heat-specific nutrition | 26–30 Aug |
| #5 | Bike + marathon pacing plan | 2–6 Sep |
Hit the bell on our blog to stay on top of the “Conquer Nice” series.
Redefine Your Limits ·
See you floating in the bay on September 14.
