SeaGen Tidal Farm — United Kingdom

SeaGen Tidal Farm is a 1.2 MW wave and tidal power plant in Northern Ireland, United Kingdom. It is operated by Marine Current Turbines (MCT). Based on its capacity (estimated), it can supply roughly 750 homes (estimated). It ranks #2723 of 2,860 United Kingdom power plants by installed capacity. As a non-combustion source, it has no direct CO₂ emissions from generation. In context, the national grid averages 217 gCO₂/kWh (64.4% low-carbon) (2025).

Plant data: WRI Global Power Plant Database (CC BY 4.0), id GBR0002403.

Data provenance

Capacity and fuel are the upstream open-dataset record, not yet matched to a 2026 registry or GEM entry.

capacity: WRI GPPD; fuel: WRI GPPD

In context: how this plant compares

At 1.2 MW, SeaGen Tidal Farm is below the median wave and tidal plant in United Kingdom (2 MW). This facility converts its energy source into electricity for the grid; its capacity, fuel type and location determine its role in the national power mix.

Capacity comparison computed from the WRI Global Power Plant Database; fuel-type context is general engineering background.

Key facts

Share of United Kingdom wave and tidal capacity

3.1% of 38 MW across 7 plants in this dataset

Calculated from the capacity and generation records in this dataset (WRI Global Power Plant Database (CC BY 4.0)).

Capacity vs largest wave and tidal plants in United Kingdom

Installed capacity (MW), WRI Global Power Plant Database (CC BY 4.0).

Owner

Operated by Marine Current Turbines (MCT).

Local climate & thermal context

This wave and tidal plant converts the motion of waves or tides into electricity. It sits in a temperate oceanic climate (Köppen Cfb) — Northern Hemisphere, latitude 54.4°N — which shapes how much energy it can produce and how its output varies through the year.

Monthly mean temperature

Heating degree-days here run 35% above the median power plant in this dataset — a proxy for how much extra energy heated equipment must replace through its surfaces in winter.

Climate heat-demand index: 71/100 — this site sits in the top third of the power plants we cover by heating degree-days.

Climate normals: WorldClim 2.1 (1970–2000 monthly normals, 10 arc-min, CC BY 4.0); zone: Köppen-Geiger world climate classification (Kottek et al. 2006, 0.5° grid). Degree-days & heat-demand index computed by PowerAtlas — a modelled heat-demand proxy, not a measured site figure.

Site climate & environmental severity

This site sits in a corrosive environment (estimated ISO 9223 class C4 — High), with humidity / wetness the leading environmental stress.

Indicative estimate via the ISO 9223:2012 informative method (atmospheric corrosivity from temperature, time-of-wetness and airborne salinity), using WorldClim climate normals, the Köppen-Geiger class and coast distance. Indicative, not a measured corrosion rate.

How it compares & nearby plants

The #5 largest wave and tidal power plant of 7 in United Kingdom by capacity.

United Kingdom has 7 wave and tidal power plants in this dataset, together about 38 MW of capacity.

Nearby power plants

• Tullynaskeagh · Solar · 5.1 MW · Northern Ireland
• Ballyboley Solar (Carrowdore) · Solar · 6 MW · Northern Ireland
• BH Energy - Biogas (AD) · Biomass · 2.1 MW · Northern Ireland
• Belfast Harbour Estate power station · Gas · 480 MW · County Antrim
• Airport Road West · Biomass · 1.2 MW · Northern Ireland
• Belfast West power station · Coal · 240 MW ·

Location

Coordinates 54.3518, -5.539 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.

Frequently asked questions