What this page shows. Today’s half-hourly Agile Octopus prices for your region, the current Octopus Go rates, and the carbon intensity of the Great Britain grid for the next 24 hours. The figures update automatically, so you can see when electricity is cheaper or cleaner and plan flexible jobs around it.
How this page is made. The numbers below are fetched automatically from the public sources listed at the bottom and are not edited by us. The text on this page is prepared with AI assistance and checked against those sources. Drafts are prepared with AI assistance and checked against the sources listed on this page. They are not reviewed by a qualified electrician. Page text last checked: 4 November 2026. Spotted a mistake? Email editorial@uksmartplugs.co.uk. See How we work.
Agile Octopus prices: London
Right now (10:00-10:30): 33.86p per kWh including VAT.
Today
- Cheapest half-hour: 00:00-00:30 at 30.7p/kWh
- Most expensive half-hour: 16:30-17:00 at 57.9p/kWh
- Cheapest 1 hour: 00:00-01:00, average 31.2p/kWh
- Cheapest 3 hours: 02:30-05:30, average 31.4p/kWh
- Simple average of the day: 37.8p/kWh
Five cheapest half-hours
| Half-hour | Price incl. VAT |
|---|---|
| 00:00-00:30 | 30.7p/kWh |
| 04:30-05:00 | 31.0p/kWh |
| 03:30-04:00 | 31.0p/kWh |
| 02:30-03:00 | 31.3p/kWh |
| 05:00-05:30 | 31.5p/kWh |
Tomorrow’s Agile prices are normally published at around 4pm.
Octopus Go rates today: London
| Period (UK time) | Unit rate incl. VAT | Type |
|---|---|---|
| Tue 05:30 to Wed 00:30 | 34.53p/kWh | Standard rate |
| Wed 00:30 to Wed 05:30 | 9.40p/kWh | Cheap rate |
| Wed 05:30 to Thu 00:30 | 34.53p/kWh | Standard rate |
Carbon intensity of the GB grid (next 24 hours)
- Greenest 2 hours: Thu 03:30-05:30, about 84 gCO2/kWh
- Highest-carbon 2 hours: Wed 15:30-17:30, about 165 gCO2/kWh
National forecast, not specific to your region. Lower is greener.
Data last fetched: 4 November 2026, 09:52 UK time.
More tools: find the cheapest time to run your appliance or charge an EV, or see the Agile Octopus price statistics for the last 30 days.
How to use these numbers
- If you are on Agile Octopus, your unit price changes every half hour. Moving flexible jobs (a dishwasher, a washing machine, charging a laptop or an electric car) into the cheapest hours is where the saving comes from. See how Agile Octopus works.
- If you are on Octopus Go, the cheap rate applies in a fixed overnight window, shown in the table above. See scheduling with Economy 7 and Octopus Go.
- If you are on another tariff, use this page only as a guide to when the grid is busy or clean. Your own price is on your bill or in your supplier’s app.
- Work out the cost of an appliance with our running-cost calculator: enter its watts, the hours of use and the unit rate you see above.
Safety first
A cheap half-hour is not a reason to run something unattended. Use delay-start or timers only on appliances whose manufacturer allows it, and read what not to plug into a smart plug before automating anything that heats.
Where the data comes from
- Agile Octopus and Octopus Go unit rates: Octopus Energy’s public API (developer.octopus.energy). Prices are in pence per kWh including VAT, for the region you pick.
- Carbon intensity: the Carbon Intensity API from the National Energy System Operator (carbonintensity.org.uk). National forecast in grams of CO2 per kWh; lower is cleaner.
Limits
- These are unit rates only. They do not include your standing charge.
- Agile prices for tomorrow are normally published at around 4pm. Rates can be revised by the supplier, so check your supplier’s app before you rely on a figure.
- We are independent. We are not affiliated with Octopus Energy or the National Energy System Operator, and we do not earn anything from this page.
- This page is information, not financial advice. If a source cannot be reached we show the last figures we have, with a warning.