Marine heatwaves around the UK and Ireland
Temperature anomalies and duration of MHW events since 2007
Jun 2023
Duration: 2 weeks
Peak anomaly
at the height of
the heatwave: 4⁰C
Jul 2009
3 weeks
4⁰C
North Sea
Atlantic
Ocean
Jun 2018
2 months
2.5⁰C
Edinburgh
Belfast
Jul 2022
1.5 months
2⁰C
Dublin
London
Cardiff
Jan 2007
5 months
1.5⁰C
400 km
400 miles
Jul 2009
3 weeks
4⁰C
Jun 2023
Duration: 2 weeks
Peak anomaly
at the height of
the heatwave: 4⁰C
North Sea
Atlantic
Ocean
Edinburgh
Jun 2018
2 months
2.5⁰C
Belfast
Jul 2022
1.5 months
2⁰C
Dublin
Cardiff
London
Jan 2007
5 months
1.5⁰C
300 km
300 miles