SORT OF

middle of today’s range in Portsmouth

124 gCO₂/kWh

cheapest (38 g) peak (120 g)

data may be stale — as of loaded

Portsmouth · DNO H · SSEN

next 24 hours

cheapest 12:00 tomorrow · 38 g peak 05:00 tomorrow · 120 g

good time for…

  • dishwasher cheapest from 10:30
  • washing machine cheapest from 10:00
  • tumble dryer cheapest from 10:00
  • EV top-up cheapest from 10:00
  • EV full charge cheapest from 09:00
  • immersion heater cheapest from 10:00
  • oven roast cheapest from 10:30

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.

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