StackPath Ireland

Power · offshore wind

Offshore wind in Ireland: every project, tracked

Ireland has 25 MW of offshore wind operating, the Arklow Bank pilot built in 2004 (StackPath tracker, Oct 2026). 3,799 MW across 5 first-phase projects awaits An Coimisiún Pleanála, against a target of at least 5 GW. Only 1,175 MW is unsubsidised and so open to data-centre power deals.

Updated 10 October 2026 · data build 2026-10-10 · how we know · corrections

From auction to first power

Figure 1

Offshore wind: from auction to first power

None of the new offshore wind farms has planning consent. All 5 pending applications (3,799 MW) are past their statutory decision dates, so on our assumed dates the first new power arrives around 2031, not 2030.

Irish offshore wind projects: planning wait, assumed first power and contract longstops; expected capacity by yearCodling Wind Park, 1300 MW, Pending at An Coimisiún Pleanála (OA29N.320768); lodged 2024-09-06, statutory due date 2025-04-01 (passed); no decision at 2026-10-10.; first power assumed 2033; data centres cannot buy its output. Dublin Array, 824 MW, Pending at An Coimisiún Pleanála (OA06D.321992); lodged 2025-02-28, statutory due date 2025-09-09 (passed); no decision at 2026-10-10.; first power assumed 2033; data centres cannot buy its output. North Irish Sea Array (NISA), 500 MW, Pending at An Coimisiún Pleanála (OA29N.319866); lodged 2024-06-07, statutory due date 2024-12-12 (passed); no decision at 2026-10-10.; first power assumed 2033; data centres cannot buy its output. Sceirde Rocks (Skerd Rocks), 450 MW, Planning application withdrawn (letter after 4 Dec 2025 meeting; reported 2 Jan 2026). ORESS 1 now has 3 contractors.; first power assumed not counted; data centres cannot buy its output. Oriel Wind Farm, 375 MW, Pending at An Coimisiún Pleanála (OA15.319799); lodged 2024-05-24, statutory due date 2026-09-21 (passed); no decision at 2026-10-10.; first power assumed 2031; data centres can buy its output. Arklow Bank Wind Park 2, 800 MW, Pending at An Coimisiún Pleanála (OA27.319864); lodged 2024-06-06, statutory due date 2024-12-10 (passed); no decision at 2026-10-10.; first power assumed 2032; data centres can buy its output. Tonn Nua (SC-DMAP site A), 900 MW, Auction won Nov/Dec 2025; planning application not yet lodged (MAC with MARA).; first power assumed 2035; data centres cannot buy its output. South Coast DMAP sites B-D, 4100 MW, Designated in SC-DMAP (approved 31 Oct 2024); next auction expected 2027.; first power assumed not counted; data centres cannot buy its output.○ LODGED · GREY = IN PLANNING (DARKER = PAST DUE DATE) · ◆ ASSUMED FIRST POWER · | CONTRACT LONGSTOP202420262028203020322034203620382030: 5 GW goaltodayCodling Wind Park · 1,300 MWORESS 1 (state)Codling Wind Park: planning lodged 6 Sep 2024, statutory decision due 1 Apr 2025, still pending at 10 Oct 2026 (25.1 months)Codling Wind Park: first power assumed 2033 (our assumption: Decision expected H1 2027 (WEI, May 2026); ~5-6 years consent-to-power; inside the 2034 longstop.)Contract longstop 2034Dublin Array · 824 MWORESS 1 (state)Dublin Array: planning lodged 28 Feb 2025, statutory decision due 9 Sep 2025, still pending at 10 Oct 2026 (19.4 months)Dublin Array: first power assumed 2033 (our assumption: Decision expected H1 2027 (WEI, May 2026); developer's earlier 2030 target (unchecked) no longer credible.)Contract longstop 2034North Irish Sea Array · 500 MWORESS 1 (state)North Irish Sea Array (NISA): planning lodged 7 Jun 2024, statutory decision due 12 Dec 2024, still pending at 10 Oct 2026 (28.1 months)North Irish Sea Array (NISA): first power assumed 2033 (our assumption: Decision expected H1 2027 (WEI, May 2026); inside the 2034 longstop.)Contract longstop 2034Sceirde Rocks · 450 MWwithdrawnContract longstop 2034Oriel Wind Farm · 375 MWmerchant · data centres can buyOriel Wind Farm: planning lodged 24 May 2024, statutory decision due 21 Sep 2026, still pending at 10 Oct 2026 (28.5 months)Oriel Wind Farm: first power assumed 2031 (our assumption: Government's own line (first project constructed by 2030, operational early 2030s); decision still pending.)Arklow Bank Wind Park 2 · 800 MWmerchant · data centres can buyArklow Bank Wind Park 2: planning lodged 6 Jun 2024, statutory decision due 10 Dec 2024, still pending at 10 Oct 2026 (28.1 months)Arklow Bank Wind Park 2: first power assumed 2032 (our assumption: Decision expected Dec 2026; SSE still needs a route to market and FID (June 2026).)Tonn Nua · 900 MWORESS Tonn Nua (state)Tonn Nua (SC-DMAP site A): first power assumed 2035 (our assumption: Planning not yet lodged; target COD is at least 60 months after consent, longstop 1 Jan 2037.)Contract longstop 2037South Coast DMAP sites B-D · 4,100 MWfuture state auctionauction expected 2027; not countedOffshore wind expected to be running, MW at year endTHIS INDEX (ASSUMED DATES) VS EIRGRID'S ADEQUACY CASES2k4k6k8k5 GW goal, 2030202620282030203220342036this indexEirGrid base (band: low–high)of which data centres could buy (this index)
Irish offshore wind projects: planning wait, assumed first power and contract longstops; expected capacity by yearCodling Wind Park, 1300 MW, Pending at An Coimisiún Pleanála (OA29N.320768); lodged 2024-09-06, statutory due date 2025-04-01 (passed); no decision at 2026-10-10.; first power assumed 2033; data centres cannot buy its output. Dublin Array, 824 MW, Pending at An Coimisiún Pleanála (OA06D.321992); lodged 2025-02-28, statutory due date 2025-09-09 (passed); no decision at 2026-10-10.; first power assumed 2033; data centres cannot buy its output. North Irish Sea Array (NISA), 500 MW, Pending at An Coimisiún Pleanála (OA29N.319866); lodged 2024-06-07, statutory due date 2024-12-12 (passed); no decision at 2026-10-10.; first power assumed 2033; data centres cannot buy its output. Sceirde Rocks (Skerd Rocks), 450 MW, Planning application withdrawn (letter after 4 Dec 2025 meeting; reported 2 Jan 2026). ORESS 1 now has 3 contractors.; first power assumed not counted; data centres cannot buy its output. Oriel Wind Farm, 375 MW, Pending at An Coimisiún Pleanála (OA15.319799); lodged 2024-05-24, statutory due date 2026-09-21 (passed); no decision at 2026-10-10.; first power assumed 2031; data centres can buy its output. Arklow Bank Wind Park 2, 800 MW, Pending at An Coimisiún Pleanála (OA27.319864); lodged 2024-06-06, statutory due date 2024-12-10 (passed); no decision at 2026-10-10.; first power assumed 2032; data centres can buy its output. Tonn Nua (SC-DMAP site A), 900 MW, Auction won Nov/Dec 2025; planning application not yet lodged (MAC with MARA).; first power assumed 2035; data centres cannot buy its output. South Coast DMAP sites B-D, 4100 MW, Designated in SC-DMAP (approved 31 Oct 2024); next auction expected 2027.; first power assumed not counted; data centres cannot buy its output.○ LODGED · GREY = IN PLANNING (DARKER = OVERDUE)◆ ASSUMED FIRST POWER · | CONTRACT LONGSTOP’24’26’28’30’32’34’36’382030: 5 GW goaltodayCodling Wind Park · 1,300 MWORESS 1Codling Wind Park: planning lodged 6 Sep 2024, statutory decision due 1 Apr 2025, still pending at 10 Oct 2026 (25.1 months)Codling Wind Park: first power assumed 2033 (our assumption: Decision expected H1 2027 (WEI, May 2026); ~5-6 years consent-to-power; inside the 2034 longstop.)Contract longstop 2034Dublin Array · 824 MWORESS 1Dublin Array: planning lodged 28 Feb 2025, statutory decision due 9 Sep 2025, still pending at 10 Oct 2026 (19.4 months)Dublin Array: first power assumed 2033 (our assumption: Decision expected H1 2027 (WEI, May 2026); developer's earlier 2030 target (unchecked) no longer credible.)Contract longstop 2034North Irish Sea Array · 500 MWORESS 1North Irish Sea Array (NISA): planning lodged 7 Jun 2024, statutory decision due 12 Dec 2024, still pending at 10 Oct 2026 (28.1 months)North Irish Sea Array (NISA): first power assumed 2033 (our assumption: Decision expected H1 2027 (WEI, May 2026); inside the 2034 longstop.)Contract longstop 2034Sceirde Rocks · 450 MWwithdrawnContract longstop 2034Oriel Wind Farm · 375 MWDCs can buyOriel Wind Farm: planning lodged 24 May 2024, statutory decision due 21 Sep 2026, still pending at 10 Oct 2026 (28.5 months)Oriel Wind Farm: first power assumed 2031 (our assumption: Government's own line (first project constructed by 2030, operational early 2030s); decision still pending.)Arklow Bank Wind Park 2 · 800 MWDCs can buyArklow Bank Wind Park 2: planning lodged 6 Jun 2024, statutory decision due 10 Dec 2024, still pending at 10 Oct 2026 (28.1 months)Arklow Bank Wind Park 2: first power assumed 2032 (our assumption: Decision expected Dec 2026; SSE still needs a route to market and FID (June 2026).)Tonn Nua · 900 MWORESS Tonn NuaTonn Nua (SC-DMAP site A): first power assumed 2035 (our assumption: Planning not yet lodged; target COD is at least 60 months after consent, longstop 1 Jan 2037.)Contract longstop 2037SC-DMAP sites B-D · 4,100 MWfuture state auctionauction expected 2027; not countedOffshore wind expected to be running, MW at year endTHIS INDEX (ASSUMED DATES) VS EIRGRID'S ADEQUACY CASES2k4k6k8k5 GW goal, 2030202620282030203220342036this indexEirGrid base (band: low–high)of which data centres could buy (this index)

Each row is a named project. Grey bars show the time since its planning application was lodged, darker once the statutory decision date has passed; diamonds are the year we assume first power, and black ticks are the contract longstop, which for the ORESS 1 projects the State moved from 31 Dec 2031 to 31 Dec 2034 on 27 Mar 2026. Only the two projects that lost the 2023 auction, Oriel and Arklow Bank 2 (1,175 MW), can sell to data centres under the CRU's 80% rule, since state-supported output doesn't count. The lower chart sets our year-by-year total against EirGrid's adequacy cases: about 25 MW running in 2030 on our dates, 1,350 MW in EirGrid's base case, against a goal of 5 GW.

EstimateFirst-power years are this index's assumptions per project, from decision timing and typical consent-to-power times; EirGrid's figures are its own scenario inputs.

Sources: EirGrid ORESS 1 final auction results, 2023-06-14 · An Coimisiún Pleanála case pages (snapshot), 2026-10-10 · DCEE ORESS 1 terms v1.3, 2026-03-27 · DCEE Tonn Nua result, 2025-11-26 · EirGrid/SONI AIRAA 2026–2035, 2025-12

Every offshore project

25 MW
Offshore wind running today
Arklow Bank, since 2004
25 MW
Our estimate for 2030
target ≥5 GW · EirGrid base 1,350 MW
1,175 MW
Offshore that data centres could contract
Oriel + Arklow Bank 2 · ~4.63 TWh/yr
3,524 MW
State-backed, so can't count for data centres
Codling, Dublin Array, NISA, Tonn Nua
Only the losers can help. The two projects that failed the State's first offshore auction (Oriel and Arklow Bank 2) must sell to a company, so they're the only named offshore wind that counts toward data centres' 80% rule. Their ~4.6 TWh a year roughly matches the ~4.2 TWh needed. But neither has planning permission or a signed buyer, and none is likely before 2031–32.

Offshore wind expected by year (MW)

2026 · data-centre eligible 025
2027 · data-centre eligible 025
2028 · data-centre eligible 025
2029 · data-centre eligible 025
2030 · data-centre eligible 025
2031 · data-centre eligible 375400
2032 · data-centre eligible 1,1751,200
2033 · data-centre eligible 1,1753,824
2034 · data-centre eligible 1,1753,824
2035 · data-centre eligible 1,1754,724
2036 · data-centre eligible 1,1754,724

Our estimate from each project's status (assumed start years are our judgement, explained in the data). EirGrid's base case is higher.

The projects

ProjectMWSupportPlanning
Codling Wind Park
Fred. Olsen Seawind and EDF Renewables (50/50; ownership unchecked) · east (off Wicklow)
1,300ORESS1Pending at An Coimisiún Pleanála (OA29N.320768); lodged 2024-09-06, statutory due date 2025-04-01 (passed); no decision at 2026-10-10.
Dublin Array
RWE and Saorgus Energy (Kish/Bray Offshore Wind Ltd) · east (Kish and Bray Banks, off Dublin/Wicklow)
824ORESS1Pending at An Coimisiún Pleanála (OA06D.321992); lodged 2025-02-28, statutory due date 2025-09-09 (passed); no decision at 2026-10-10.
North Irish Sea Array (NISA)
Statkraft and Copenhagen Infrastructure Partners (unchecked) · east (off Dublin, Meath, Louth)
500ORESS1Pending at An Coimisiún Pleanála (OA29N.319866); lodged 2024-06-07, statutory due date 2024-12-12 (passed); no decision at 2026-10-10.
Sceirde Rocks (Skerd Rocks)
Fuinneamh Sceirde Teoranta (Corio Generation) · west (off Galway/Clare)
450ORESS1Planning application withdrawn (letter after 4 Dec 2025 meeting; reported 2 Jan 2026). ORESS 1 now has 3 contractors.
Oriel Wind Farm
Oriel Windfarm Ltd (ESB and Parkwind/JERA Nex) · east (off Louth)
375none: can sell to data centresPending at An Coimisiún Pleanála (OA15.319799); lodged 2024-05-24, statutory due date 2026-09-21 (passed); no decision at 2026-10-10.
Arklow Bank Wind Park 2
Sure Partners Ltd (SSE Renewables) · east (off Wicklow/Wexford)
800none: can sell to data centresPending at An Coimisiún Pleanála (OA27.319864); lodged 2024-06-06, statutory due date 2024-12-10 (passed); no decision at 2026-10-10.
Tonn Nua (SC-DMAP site A)
Helvick Head Offshore Wind DAC (ESB and Ørsted) · south (off Waterford)
900Tonn NuaAuction won Nov/Dec 2025; planning application not yet lodged (MAC with MARA).
South Coast DMAP sites B-D
not yet auctioned · south (Cork/Waterford/Wexford)
4,100future ORESS (expected)Designated in SC-DMAP (approved 31 Oct 2024); next auction expected 2027.
Arklow Bank Wind Park (phase 1)
operating since 2004 · east (off Wicklow)
25none (existing)Operating (2004).

EirGrid ORESS results and adequacy study · DCEE · An Coimisiún Pleanála case pages · CRU2025236 · quotes checked · as of 2026-10-10

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