SORT OF

middle of today’s range in Portsmouth

102 gCO₂/kWh

cheapest (62 g) peak (261 g)

data may be stale — as of loaded

Portsmouth · DNO H · SSEN

next 24 hours

cheapest 10:30 tomorrow · 62 g peak 23:00 · 261 g

good time for…

  • dishwasher cheapest from 11:30
  • washing machine cheapest from 12:00
  • tumble dryer cheapest from 12:00
  • EV top-up cheapest from 10:00
  • EV full charge cheapest from 07:00
  • immersion heater cheapest from 12:00
  • oven roast cheapest from 12:00

about Portsmouth

Portsmouth draws its electricity from the SSEN distribution network — DNO region H. The answer above is the live carbon-intensity forecast for that region, published every half-hour by the National Energy System Operator. Households across Portsmouth share the same regional grid, so the answer is the same whether you're in PO1 or a few outcodes over.

If you're on Octopus Agile, your half-hourly price tracks the same wholesale market that drives carbon intensity in Portsmouth's grid. For everyone else on a fixed-rate tariff, the answer is the honest "is now a good time to use power" signal — your bill won't change, but the grid is greener when wind and solar are doing the work.

or check Southern England Southampton Oxford Reading London Birmingham Manchester all regions