Global Offshore Wind Capacity Reaches 83 GW, 100 GW More To Be Awarded in 2025-2026, New Report Says
The title of this post, is the same as that of this article on offshoreWIND.biz.
This is the sub-heading.
According to a new market report from the Global Wind Energy Council (GWEC), there are now 83 GW of offshore wind capacity installed globally, with 48 GW more in the construction phase worldwide as of May this year.
The first paragraph is a quote from Rebecca Williams, Deputy CEO at GWEC.
Our report finds that there is now already 83 GW of offshore wind installed worldwide, keeping the lights on for 73 million households, and powering countries’ economic development. There is currently a further 48 GW of offshore wind [under] construction worldwide. With its unique position in the marine space, and ability to produce large amounts of reliable, homegrown power, nations around the world are pushing forward the technology to enhance their energy independence and autonomy
I doubt Ms. Williams will be on the Donald Trump’s Christmas card list.
The article is worth a full read, as it contains some interesting statistics.
This is the last paragraph of the article.
Global Wind Energy Council’s 2024 global offshore wind outlook for total additions in the 2025-2029 period was 156.72 GW, which has now been downgraded to 118.56 GW.
These are my estimates for the amount of offshore wind in the UK.
- Currently Installed – 16, 035 MW
- To Be Installed in 2025 – 1,235 MW
- To Be Installed in 2026 – 4,907 MW
- To Be Installed in 2027 – 5,750 MW
- To Be Installed in 2028 – 480 MW
- To Be Installed in 2029 – 1,363 MW
The UK should be installing 13,735 MW, which would.
- Lift total offshore wind capacity to 29.8 GW.
- This is an 86 % increase in capacity from July 2025.
- As I write this, we are using 29.3 GW.
- We would be adding 11.6 % of the global additions for 2025-2029, which isn’t bad for such a small country.
All this wind will need to be backed up, for when the wind doesn’t blow.
So I asked Google AI how much electricity storage we will have by 2029 and got this AI Overview.
In 2029, the UK is expected to have a significant amount of battery energy storage capacity, with estimates ranging from 27 to 29 GW, according to the House of Commons Library and Cornwall Insight. This capacity is crucial for supporting the UK’s transition to a clean energy system and ensuring a stable electricity supply.
Obviously, Google AI isn’t that intelligent, as it made the mistake made by many electricity storage companies of just giving the output of the battery, as it sounds better, rather than both the output and the storage capacity.
Consider.
- Most Battery Energy Storage Systems (BESS) can provide two hours of output.
- Highview Power’s big batteries are 200 MW/2.5 GWh, so will provide 12.5 hours of output.
If I assume that the average storage is just two hours, that means the available storage will be at least 54 GWh.
Given that we also had 16 GW of solar power in June 2024 and if this increases at a similar rate to offshore wind power, it will certainly be able to help fill the energy storage, I think we’ll have enough renewable energy to play a big part in the next election.
About The Global Wind Energy Council (GWEC)
I asked Google AI for a summary about GWEC and got this AI Overview.
The Global Wind Energy Council (GWEC) has its global headquarters in Lisbon, Portugal. Additionally, they have offices in Brussels, Belgium; Singapore; and London, UK.
GWEC’s presence is not limited to these locations, as they have a global network of experts working across different continents, according to the organization’s website. Their flagship report, the Global Wind Report, is launched annually in London. For example, the 2025 report launch took place in London.
Unsurprisingly, it doesn’t mention an office in the United States.
The report, which forms the basis of this post, can be downloaded from the GWEC web site.
The Anonymous Widower 
This is why we shouldn’t be chasing wind at pace at the moment the market is overheated along with multi year delays to get a the big heavy lift installation vessels to install the equipment.
Comment by Nicholas Lewis | August 4, 2025 |
I do wonder, if Trump has solved that problem, by cancelling wind development in US waters.
He might have done something right by the UK for once.
Comment by AnonW | August 4, 2025 |