Dieppe-Le Treport
AO2 Round 2 project. Located 17 km from Dieppe and 15.5 km from Le Treport, covering 110 km2.
Status
Under Constructionlifecycle stage
DeliveringHafrok completion outlook
Ownership
ENENGIE — 31% ◆
EDEDP Renewables — 29.5% ◆
Sumitomo Corporation — 29.5% ◆
Banque des Territoires — 10% ◆Location
FranceEnglish Channel
Technology
Capacity
496 MW ◆
Turbines
62 × 8 MW ◆
Model
Siemens Gamesa SG 8-0-167 DD ◆
Foundation
Jacket ◆
Site & conditions
Site rights
Seabed rights held ∴
Origination
France Offshore Wind Round 2 (AO2) · 2014 ·
Water depth
14–25 m ◆
Distance from shore
15.5 km ◆
Wind speed
8.9 m/s @ 100 m ≈
Revenue & grid
Offtake
FiT ◆
Grid
Secured · 3 Feb 2026 ◆
Connection
Two 225 kV HVAC export cable circuits (each 23.5 km subsea) … ◆
Schedule
FID
26 Apr 2023 ◆
COD · announced
2026 ◆
COD · Hafrok
2026 expected
Delivery outlook modelled by Hafrok · calibrated on delivered projects
2026
expected year of commercial operation
Chance of delivery
≈98%
estimated chance this project reaches commercial operation
Under Construction projects complete ≈97% of the time on Hafrok's record. A secured offtake contract lifts this one slightly; a market with a thinner delivery record and technical complexity pull a little the other way.
COD outlook
If it completes, when — Hafrok’s probability by year (teal)
| Year | Probability |
|---|---|
| 2025 | 1.3% |
| 2026 (expected) | 75.4% |
| 2027 | 21.7% |
| 2028 | 1.6% |
How Hafrok got this date
1
Starting point: the last dated milestone
Construction start in
2024. From there Hafrok adds how long similar projects (in developing offshore-wind markets) took to reach commercial operation, measured on projects that have delivered.2
Typical timing
Starting point plus the typical remaining time gives a middle estimate of
2026 Q3; the faster quarter of similar projects would be done by 2025 Q3, the slower quarter not until 2027 Q1.3
Result
Expected commercial operation
2026, likely range 2026–2027 (the middle half of outcomes for similar projects). The developer's announced date falls inside that likely range, so the announced date is adopted.4
Year-by-year chart
The bars spread that estimate across years using how similar projects actually slipped against their dates — more often late than early, which is why the bars lean right.
5
Chance of delivery — separate from timing
Start from the share of Under Construction projects that went on to complete — ≈97%, measured on Hafrok's record of delivered and abandoned projects, with an allowance held back where that record cannot yet speak (projects still unresolved, changed market conditions). Based on the measured record — all 257 construction starts with a final outcome reached operation — adjusted down for projects still mid-build and for legal-challenge risk. Then adjust for this project's own evidence — offtake, market, size, technical complexity — to ≈98%, which rates it
Delivering on Hafrok's four-step delivery scale (Delivering · Expected · Prospective · Fragile).Project timeline & ownership verified milestones on the spine · ownership from Hafrok’s transactions record
Origination · 2014-05
France Offshore Wind Round 2 (AO2)
- Awarded to
- Engie + EDP Renewables
- Basis
- integrated tender
From the auction results — the round that created the project.
Farmdown · 2018-12
EDP Renewables → Sumitomo Corporation 13.5%
- Stake
- 13.5%
- Consideration
- €21.4m
- Implied 100% value
- €159m
- Implied
- €0.32m / MW
- Basis
- Basis not stated by the source
- Announced
- 2018-12
- Project stage
- consented
ENGIE and EDPR signed an alliance with Sumitomo Corporation for the development of two French offshore wind projects: Dieppe-Le Tréport and Îles d'Yeu et de Noirmoutier. As part of this alliance, EDPR sold 13.5% stakes in each of the two projects to Sumitomo. The combined reported consideration was approximately EUR 42.8 million across both projects (EUR ~21.4m per project, pro-rata by capacity). Post-transaction ownership of Dieppe-Le Tréport: ENGIE 31%, EDPR 29.5%, Sumitomo 29.5%, Banque des Territoires 10%. The project structure was held via Eoliennes en Mer Dieppe-Le Tréport (EMDT). EDPR received EUR 42.8m upfront for both projects combined, which could increase over time as agreed conditions are met; the per-project split is by capacity and approximate. The project held its environmental authorisation (Autorisation environnementale) from February 2019.
Evidence
- engie.com — Newsroom Engie : Find here all our press releases, articles, photos, videos ↗ 2018-12 ◆ held
- renewablesnow.com — UPDATE - EDPR sells stake in French offshore wind project for EUR 43m - Offshore Wind News ↗ 2018-12 ◆ held
- offshoreWIND.biz — Sumitomo Joins French Offshore Wind Duo ↗ 2018-12 ◆ held
- EDP Renovaveis — EDPR sells stake in Offshore France ↗ 2018-12-18 ◆ held
From Hafrok’s transactions record
Corporate · 2020-07
Ocean Winds 60.5%
- Stake
- 60.5%
- Consideration
- not disclosed
- Announced
- 2020-07
- Project stage
- consented
Ocean Winds was formed in July 2020 as a 50-50 joint venture between ENGIE and EDP Renewables, created as the exclusive vehicle for both companies' offshore wind assets and pipeline. Upon formation, Ocean Winds absorbed ENGIE's 31% and EDPR's 29.5% stakes in Dieppe-Le Tréport (60.5% combined), becoming the majority shareholder via EMDT. No external consideration was paid; this was an internal corporate restructuring of existing ENGIE and EDPR offshore wind assets. The Ocean Winds formation announcement described a total portfolio at inception of 1.5 GW under construction and 3.7 GW under development. Sumitomo (29.5%) and Banque des Territoires (10%) retained their direct stakes in EMDT. Final Investment Decision was taken April 27, 2023, with financing signed April 26, 2023. The project reached construction and is expected COD H2 2026.
Evidence
- engie.com — Newsroom Engie : Find here all our press releases, articles, photos, videos ↗ 2018-12 ◆ held
- offshoreWIND.biz — ENGIE and EDPR Hear the Call of Ocean Winds ↗ 2020-07 ◆ held
- Ocean Winds — Dieppe Le Tréport offshore wind farm reaches Final Investment Decision and starts construction. ↗ 2023-04-26 ◆ held
From Hafrok’s transactions record
Dashed tick marks today (13 Oct 2026). The ▲ below the spine is the developer-announced COD. The teal diamond on the spine is origination — the seabed award or round that created the project. Every other ownership event lives in the band below: one station per recorded deal, dated at its label, in deal order rather than to calendar scale. Secondary trades appear only at the interchanges; grey lines are parties whose entry or exit Hafrok’s record does not hold.
Revenue & offtake contract duration and price levels · money of the day
496 MW contracted — tender award
● Tender award · France Offshore Wind Round 2 (AO2)
Price€131/MWh ·Capacity496 MWAwardedMay 2014Term20 yrs
Installation how the build is going · from sourced statements and Hafrok’s registers
Installation under way
Installation · on record
StageUnder Construction
Offshore constructionstarted 2024-06
Turbinesnot reportedshown when the developer reports a dated count
Expected start of operation2026
Construction ports
PortLe Havre ◆·turbine assembly · quay 400 m · draft 12 m
PortCherbourg ◆·foundation storage · draft 14 m
PortDieppe ◆operations base
Grid connection
from Hafrok’s substation, converter and cable registers
Offshore platforms · 1
Offshore substationDieppe Le Tréport offshore substation (poste électrique en mer)·under construction · owner unknown
Grid connection · ready in time?
when each part of the grid connection is due, against the start date the developer states (black line) and the year Hafrok expects (teal band) · a bar spans the whole year, quarter or month the source gives
installed or in serviceexpected deliveryearlier date that was later moved
Sources & verification
Rests on 17 sources (15 primary) · ◆ 9 documents held
◆Verified≈Modelled◇Sourced∴Inferred⌁Convention○Unverified∅No source·Derived
Numbers are stable citation ids — grouped by source class, so they are not consecutive.
Operator11
[1]
Eoliennes en Mer Dieppe Le Treport (EMDT)2026-06
“La société Éoliennes en Mer Dieppe Le Tréport est un consortium constitué de trois actionnaires : Ocean Winds (60,5%), Sumitomo Corporation (29,5%) et La Caisse des dépots (10%).”
supportsTurbinesUnit capacityTotal capacityDistance from shore
[2]
Ocean Winds2023-04-26◆ Dieppe Le Tréport offshore wind farm rea…
“Ocean Winds, Sumitomo Corporation, and la Banque des Territoires as shareholders of the company 'Eoliennes en Mer Dieppe Le Treport' (EMDT) ... The EMDT project represents an investment of around EUR …”
supportsFinal investment decisionCommercial operationTurbinesTotal capacity
[3]
Eoliennes en Mer Dieppe Le Treport (EMDT)2019-02-26
“Les préfets de la région Normandie, de la Seine-Maritime et de la Somme ont autorisé, par arrêtés du 26 février 2019, la réalisation du parc éolien en mer au large de Dieppe et du Tréport et de son ra…”
supportsConsentConsent granted
[4]
Légifrance / Préfet de Seine-Maritime2018-10-12
“Arrêté du 12 octobre 2018 autorisant la société Eoliennes en Mer de Dieppe-Le Tréport (EMDT) à exploiter une installation de production d'électricité ... d'une puissance de 496 MW ... dans le domaine …”
supportsConsentTotal capacityConsent granted
[5]
Ministère de la Transition écologique (France)2023◆ Eolien en mer — French government offsho…
“Les lauréats des appels d'offres éolien en mer signent un contrat d'achat avec EDF Obligation d'Achat (EDF OA) pour une durée de 20 ans, à un tarif fixé lors de l'appel d'offres.”
supportsMechanismDetail
[8]
[9]
Eoliennes en Mer Dieppe Le Treport (EMDT)2026-06
“Turbine installation: April–July 2026. Commercial Operation Date: November 2026. Ports: Le Havre (turbine components), Cherbourg (foundations staging). Pile installation: June–December 2024.”
supportsOnshore constructionOffshore constructionturbine assemblyfoundation storageoperations base
[10]
[11]
Ocean Winds2025-09-10◆ Ocean Winds celebrates the successful in…
“Ocean Winds celebrates the successful installation of the first jacket foundation at the Dieppe – Le Tréport offshore wind farm. The foundations were loaded at the Port of Cherbourg and installed by D…”
supportsFoundationturbine assemblyfoundation storageoperations base
[15]
DGEC — Ministère de la Transition écologique (eoliennesenmer.fr)2026-08-25◆ French Eoliennes en mer register (DGEC),…
“Register node 852 (node--type-project) at /facades-maritimes-en-france/facade-manche-mer-du-nord/dieppe-le-treport — title 'Dieppe-Le Tréport'; page text 1904 chars, hash e75e5e396a5d093e…. Identifyin…”
supportsRegister entry
[20]
Jan De Nul2026-09-11◆ Offshore wind farm dieppe le treport hal…
“This week, our jack-up installation vessel Vole au vent installed the 31st wind turbine at the French offshore wind farm Dieppe-Le Tréport, marking the halfway point of the installation campaign. Sinc…”
supportsStatus note
Auction results1
[21]
CRE (Commission de regulation de l'energie) / DGEC2013◆ fr-ao2-cahier-des-charges
AO2 cahier des charges (18 Feb 2013): Lot 1 Le Treport 500 MW, Lot 2 Yeu-Noirmoutier 500 MW.
supportsTender award · France Offshore Wind Round 2 (AO2)
Trade press5
[6]
[7]
[12]
Power Technology (GlobalData)2022-06◆ Dieppe-Le Treport Offshore Wind Farm
Press report — cited, not quoted; read it at the source link.
supportsWater depth
[13]
[14]