SouthCoast Wind
Lease area OCS-A 0521 (formerly Mayflower Wind), ~45 km south of Nantucket. Ocean Winds (OW North America) acquired 100% ownership.
Status
On Holdlifecycle stage
UnlikelyHafrok delivery likelihood
Ownership
Ocean Winds — 100% ◆Location
United StatesNorthwest Atlantic
Technology
Capacity
2,400 MW ◇
Turbines
—
Foundation
—
Site & conditions
Site rights
Seabed rights held ∴
Origination
BOEM Massachusetts Lease Sale (ATLW-4A) · 2018 ·
Water depth
38–62 m ≈
Wind speed
10.2 m/s @ 150 m ≈
Revenue & grid
Offtake
PPA ◆
Grid
—
Schedule
FID
Not taken
COD · Hafrok
for registered readers
On hold since
Feb 2025 ◆
Delivery outlook modelled by Hafrok · calibrated on delivered projects
UnlikelyHafrok's delivery likelihood for SouthCoast Wind
On hold. Hafrok's view of a restart is for registered readers.
Free for registered readers in early access · register below ↓
Project timeline & ownership verified milestones on the spine · ownership from Hafrok's transactions record
3 dated milestones on the spine, each with its source · 2 recorded ownership deals from Hafrok's transactions record · the developer's announced-COD history
For registered readers · register below ↓
Revenue & offtake contract terms, price levels and the route to market
the contract terms on record · price over time in money of the day · the routes to market and the next visible round
For registered readers · register below ↓
Installation how the build is going · from sourced statements and Hafrok's registers
construction status and turbines standing · vessel and port contracts · the grid connection and whether it is ready in time
For registered readers · register below ↓
Sources & verification
Rests on 14 sources (3 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.
Regulator3
[4]
[9]
Bureau of Ocean Energy Management (BOEM)2026-08-23◆ US BOEM offshore-wind register (FR docum…
“Lease row OCS-A 0521: companies ['SouthCoast Wind Energy LLC']; lease_dates ['04/01/2019']; lease_terms ['33 Years']; states ['Massachusetts']; block_count 193.”
supportsRegister entry
[10]
Bureau of Ocean Energy Management (BOEM)2026-08-23◆ SouthCoast Wind (formerly Mayflower Wind…
“On January 17, 2025, BOEM announced the approval of the SouthCoast Wind Project Construction and Operations Plan (COP), as modified by the selected alternative in the Record of Decision.”
supportsConsentConsent appliedConsent granted
Operator1
[11]
Ocean Winds2024-09-06◆ Ocean winds selected by the commonwealth…
“After a rigorous selection process led by the Massachusetts Department of Energy Resources and Rhode Island Energy, Ocean Winds ... has been selected to negotiate contracts to provide 1,087 MW of offs…”
supportsMechanismDetail
Auction results3
[13]
MA DOER / EDCs2019◆ us-ma-83c-r2
Massachusetts 83C Round 2 RFP - Mayflower/SouthCoast (terminated/repriced 2023-24).
supportsUtility PPA · Massachusetts Section 83C Round 2
[14]
MA DOER / EDCs2021◆ us-ma-83c-r3
Massachusetts 83C Round 3 RFP - Commonwealth Wind (Avangrid terminated 2023).
supportsUtility PPA · Massachusetts Section 83C Round 3
[15]
MA DOER & EDCs + RI + CT2023◆ us-ma-83c-r4
Massachusetts/multi-state 83C Round 4 RFP (MA/RI/CT coordinated, up to 3,600 MW).
supportsUtility PPA · New England Multi-State Offshore Wind Solicitation (MA + RI)
Trade press6
[3]
offshoreWIND.biz2024-03◆ Shell Exits US Offshore Wind Project, Se…
Press report — cited, not quoted; read it at the source link.
supportsoperator
[5]
[6]
[7]
[8]
[12]
Nantucket Current (State House News Service)2025-02-27◆ SouthCoast Wind Anticipates Four-Year De…
Copyrighted source — cited, not quoted; read it at the source link.
supportsOn hold
Unverified import1
[1]
unknown◆ SouthCoast Wind (formerly Mayflower Wind…
supportsTotal capacityWater depthCoordinates
Early access