ProSail

Route du Rhum 2026 · Class40 mid-race update · day 6Through the low, but no trades.

Six days in, we re-routed the leading Class40 from its position at 07:00 UTC through 50 versions of the newest ECMWF forecast. The road to Guadeloupe is settled. The weather on it is not, with three days or more under 10 knots before the finish.

  • 50 forecasts
  • Class40 (Mach 40.3) at 105% of polar
  • 1,856 NM to go, direct
  • Typical finish Mon 16 Nov 01:00 UTC (8d 18h)

This is the second stage of the briefing. Before the start we called the first half, the road to 30°W, with the finish beyond the forecast. Now the forecast reaches Guadeloupe, so we have re-routed the leader from the tracker for the second half and give a finish window in hours. We will check that window again midweek.

Race underway. The race started on Sunday 1 November. This mid-race update replaces the routes we published before the start, which stay frozen for the review. Follow the fleet on the official tracker. Open the tracker →

Fleet check, Sunday 8 November

From the official positions up to 18:30 UTC and the race news.

Benoît Sineau set off his distress beacon on Ekinox-Rhétores at 13:30 UTC on Saturday. Race control diverted Jules Bonnier on Plastic Odyssey, and by 19:45 UTC Sineau was on board with him, safe and well. Ekinox-Rhétores has retired.

Then the wind went. Our 7 November forecast had a lull at the leaders’ position as the north-westerly gave way to the easterly, down to about 6.5 knots in a typical forecast by 06:00 today. Sogestran Seafrigo was doing 1 knot at 06:00. “There’s absolutely no wind, but the sea is still very unsettled,” Guillaume Pirouelle told the race organisers. The front six closed up from 55 NM apart on Saturday morning to 31 by 13:00 today, and Amarris took the lead. By 18:30 they were moving again at 8 to 13 knots.

The same forecast brings the lull to the north group tonight. At VSF Sports’ position it has the wind under 6 knots in 48 of the 50 forecasts by midnight. At 18:30 Patapain and VSF Sports were doing 2 to 4 knots, and VSF Sports had dropped from 82 NM behind the leader this morning to 113.

In the Ultim class, Tom Laperche finished on SVR Lazartigue at 02:31 UTC on Sunday 8 November, in 6 days 13 hours 27 minutes, a new race record, the organisers say.

Fleet check, Saturday 7 November

From the official positions up to 07:00 UTC and the race news. The routes further down start from Sogestran Seafrigo’s position at 07:00.

On X on Thursday, Axel Trehin, sixth in Class40 aboard Exalt, asked “Will you take the slap with or without momentum?” as the fleet closed on the low. Two days later the leaders are through it.

Our final briefing before the start called north at 30°W, at 43°N or 45°N, in 45 of the 50 forecasts. All 37 Class40s that have crossed so far went north, between 42 and 48.4°N. The leaders crossed at 43.5 to 43.9°N early on Thursday 5 November, about 12 hours ahead of our routed boat, because they have sailed faster than the 97% of polar we gave it.

For the stretch from 30°W to 40°W we gave a north-westerly of about 28 knots in a typical forecast and 36 in 1 in 10, gusting 41 to 54, with the windiest moment between Friday afternoon and Sunday morning. It came on Friday, at the early end. “Yesterday, we had sustained winds of 40 to 45 knots,” Guillaume Pirouelle on Sogestran Seafrigo told the race organisers on Saturday, and Achille Nebout on Amarris saw gusts of 40 to 43. Our gusts held up. Our wind figure needs a closer look. The ECMWF model’s own analysis of what actually happened puts the leaders’ tracks at no more than about 29 knots, so the forecast matched the model. The skippers saw far more, in squalls and fronts that a model with a 28 km grid smooths away, read from a masthead well above the 10-metre wind a forecast gives. Either way, leading with the typical 28 undersold it for a sailor. For a blow, we will lead with the 1 in 10 figure and the gusts.

After 30°W the leaders split. Sogestran Seafrigo, Amarris and the boats around them turned south-south-west, upwind of the worst of it. Ekinox, VSF Sports, Patapain and Crédit Mutuel held north, at 40 to 42°N, and sailed close to the centre of the low, where the model has the wind down to 4 to 8 knots at times on Friday. By 07:00 today the two groups were about 300 NM apart. Overnight, while the leaders were slow, the north group gained 15 to 50 NM on distance to the finish and Ekinox climbed from 10th to 6th. At dawn the leaders found the new breeze and were doing 17 to 18 knots.

From here our forecast does not expect the north group to gain. Routed from its own 07:00 position at the same pace, VSF Sports finishes about 7 hours after Sogestran Seafrigo, which is about the 100 NM it is behind now. Both groups converge on the same road south-west, crossing 45°W at 31 to 34°N.

“Truly brutal!” said Nebout. Of the 49 Class40s that started, 40 are racing normally. Five have retired, among them Alderan, dismasted on Friday, and four are stopped, diverting or no longer reporting.

In the Ultim class, Tom Laperche on SVR Lazartigue is due in Guadeloupe tonight, beating into a south-westerly to the finish, with no trade wind at all. That is where the Class40s are heading too.

Fleet check, Wednesday 4 November

From the official positions at 10:00 UTC. The routes further down are still the ones we published before the start.

The Class40s have split ahead of the low deepening near the Azores. Solano leads the official ranking on its own, 16 NM from the rhumb line and about 145 NM south of the next boats. Every other boat in the top 25 is between 100 and 280 NM north-west of the line, and so are 42 of the 44 Class40s still racing. Furthest out among the leaders are Maccaferri Futura and Crédit Mutuel, more than 240 NM north-west.

The ranking measures the distance left to the finish, so a boat near the straight line leads for now, and a boat heading north gives up places until its angle pays. Crédit Mutuel has still climbed from 17th on Tuesday morning to 5th from out there.

Our final briefing before the start had the fastest route crossing 30°W north of 40°N in 45 of the 50 forecasts, at 43°N or 45°N, and too close to call between them. The pack is now at 45.5 to 47°N, at 24 to 25°W, while Solano is at 43.5°N and still heading south-west. The mid-race update will show where each boat crosses 30°W and how that played out.

Then comes the price of going north. For the stretch from 30°W to 40°W, from late on Thursday 5 November, our final briefing gave about 28 knots, gusting to 41 and 54 in 1 forecast in 10, with seas of 4.5 to 6 metres. Sailed solo, how boat and skipper come through it matters as much as the route.

It has been a fast and punishing first three days. Of the 49 Class40s that started, 44 are still racing, with two retired and three stopped or diverting for repairs.

Next update on Saturday 7 November, with where each boat crossed 30°W, a new route for the second half from the newest forecast, and a sharper finish window.

The options

Each strategy is sailed through all 50 forecasts, not just the ones that favour it. Point at a strategy to see its route.

Sun 07:00Mon 07:00Tue 07:00Wed 07:00Thu 07:00Fri 13 Nov 07:00Sat 14 Nov 07:00 Sogestran Seafrigo, Sat 7 Nov 07:00Finish, Pointe-à-Pitre
Grey: the fastest route in each of the 50 forecasts. Coloured: the strategies they group into. Dots mark every 24 hours on the most likely route (UTC).
Most likely and Conservative

Crossing 45°W at 32°N, north-west

Crosses 45°W
32°N, Mon 9 Nov
Typical finish
Mon 16 Nov 01:00
8 in 10 forecasts
Sun 15 Nov 08:20 – Mon 16 Nov 20:40
Fastest in
25 of 50

Best typical finish. Best when the weather goes against you.

Alternative

Crossing 45°W at 31°N

Crosses 45°W
31°N, Mon 9 Nov
Typical finish
Mon 16 Nov 06:40
8 in 10 forecasts
Sun 15 Nov 15:00 – Tue 17 Nov 07:30
Fastest in
7 of 50

Crosses 1° south of the leading option, which is fastest more often.

Alternative

Crossing 45°W at 32°N, further north-west

Crosses 45°W
32°N, Mon 9 Nov
Typical finish
Mon 16 Nov 01:40
8 in 10 forecasts
Sun 15 Nov 09:30 – Mon 16 Nov 23:50
Fastest in
18 of 50

A credible option the others beat.

In each card the shaded band covers 8 in 10 of the 50 finishes, the line is the typical finish, and each dot is one forecast.

The two leading routes finish within 37 minutes of each other and cross 45°W at the same latitude, so there is little route call left to make. What separates the boats now is how they come through the light stretch from 50°W.

The boat’s position to 40°W

North-westerly, 30 knots in a typical forecast, and 31 or more in 1 forecast in 10, with gusts of 40 to 42 knots. The windiest moment comes around Sat 09:00 UTC (Sat 07:00 to Sat 10:00 in 8 in 10 forecasts). This is the tail of the low, easing through Saturday. The next blow on this route is the easterly between 40°W and 50°W on Monday 9 November, about 25 knots in a typical forecast and 30 in 1 in 10, gusting to 41, all of it downwind.

Leg by leg

What the most likely route sails through, at the boat’s own position and time in each of the 50 forecasts. Each figure is a forecast’s windiest moment on that leg, shown as typical, with 1 forecast in 10 in brackets.

LegOn the leg (UTC)Wind, knGusts, knUpwind
The boat’s position to 40°W Sat 07:00 – Sat 23:50 NW 30 (31) 40 (42) 0%
40°W to 50°W Sat 23:50 – Tue 08:00 E 25 (30) 35 (41) 0%
50°W to Guadeloupe Tue 08:00 – Sun 15 Nov 19:10 NE 15 (18) 21 (25) 20%
Guadeloupe to Basse-Terre Sun 15 Nov 19:10 – Sun 15 Nov 21:40 E 9 (13) 16 (20) 57%
Basse-Terre to the PP buoy Sun 15 Nov 21:40 – Mon 16 Nov 01:00 E 10 (12) 16 (19) 44%

Highlighted legs reach 25 knots, gusts of 30, or 2.5 m waves in 1 forecast in 10, or about an hour or more beating in 20 knots. Forecast models smooth out the extra wind around headlands, islands and squalls, so expect more locally, and read the official weather briefing alongside this.

The key question

The route is no longer the question. From Sogestran Seafrigo’s position, 8 in 10 forecasts take the leaders across 45°W between 30 and 33°N, early on Monday 9 November. The two leading routes on the map cross at about 32°N and finish within 37 minutes of each other. Crossing at 31°N costs about 6 hours in a typical forecast. So hold about 32°N and concentrate on boat speed.

First the tail of the low. The north-westerly of about 30 knots, gusting 40, eases through Saturday. Then an easterly carries the leaders from 40°W to 50°W, about 25 knots in a typical forecast and 30 in 1 in 10, gusting to 41, all of it downwind and peaking on Monday.

The open question is the last 1,000 NM. From 50°W, from Tuesday 10 November, the trade winds are weak and unsettled. A typical forecast gives the leaders 85 hours under 10 knots on the way to Guadeloupe, and 1 forecast in 10 gives 119. In 44 of the 50 forecasts there is at least one spell of 6 hours or more under 6 knots, and the calmest moment comes around Thursday 12 November. Only 15 of the 50 agree on the wind direction. That is where the order will change, and why the finish window is wide.

For the leaders, the typical finish is about 01:00 UTC on Monday 16 November, and 8 in 10 forecasts put it between Sunday 15 November at 08:00 and Monday 16 November at 21:00. That is about two days sooner than our window before the start. A boat in the north group finishes about 7 hours later. At the back of the fleet, routed at 84% of polar from Oceanconnect’s position, the typical finish is Saturday 21 November, between Friday 20 and Monday 23 November. There the route is still open, between 30°N and 39°N at 45°W, about an hour apart, and the northern option meets a beat into Guadeloupe at the end.

How the recommendation has changed

VersionForecast runLeaningMarginFastest in
Sat 7 Nov 2026
Mid-race update on day 6, from Saturday’s forecast, routed from the leading Class40's position at 07:00 UTC at the pace the leaders have sailed. The route to Guadeloupe now looks fixed, crossing 45°W at 30 to 33°N, and the light stretch from 50°W now decides the finish.
Sat 7 Nov 00ZCrossing 45°W at 32°N, north-west37 minutes (close)25 of 50
Sat 31 Oct 2026
Final update before the start, from Saturday’s forecast, now with the higher-resolution ICON-EU model for the first days. North is firmer, in 45 of the 50 forecasts (it was 42), and none goes south. The leading option moves from 45°N to 43°N at 30°W, and the crossing comes about 8 hours sooner, late on Thursday 5 November.
Sat 31 Oct 00ZThe northern route, crossing 30°W at 43°N5.8 hours (close)29 of 50
Tue 27 Oct 2026
First look, from Tuesday’s forecast.
Tue 27 Oct 00ZThe northern route, crossing 30°W at 45°N4.7 hours (close)31 of 50

How we worked it out

  • Course modelled from the 2026 Notice of Race with amendment 1 (article 11), with the Fréhel gate, Guadeloupe to port, the Basse-Terre buoy to starboard, the PP buoy to port. Traffic separation schemes and the Saint-Brieuc wind farm are avoided, and exclusion zones follow the 2022 Sailing Instructions until the 2026 ones are published.
  • Boat routed is an ORC-certified Mach 40.3 polar at 105% of its ORC-predicted speed, the pace the top ten Class40s have sailed since the start, measured from the official positions against the real wind. That pace is lower in 20 knots or more and higher in 10 to 20, so these times may be slightly slow for the leaders. The back of the fleet is routed at 84%, its own measured pace.
  • Routed from the official tracker position at 07:00 UTC on Saturday 7 November, with the 2026 Notice of Race finish around Guadeloupe.
  • Forecast is the ECMWF ensemble, 50 members, run Sat 7 Nov 00Z, at half-degree spacing in mid-ocean. Based on ECMWF open data, licensed under CC BY 4.0.
  • Ocean currents are not included in this update.
  • Not yet included are time lost tacking, gybing and changing sails. The boat factor has been calibrated on real races and already allows for the average figure.

We will publish the post-race review after the Class40s finish, covering what the forecasts said, what the fleet did and what actually won.

Get the race briefings

An email when each briefing is published or updated, and the review afterwards. ARC 2026 and the Sydney Hobart are next. No spam, unsubscribe any time.

We only use your email to send ProSail briefings and reviews. Privacy notice