Tempo days left in the season
How many red, white and blue days remain until 31 August, and what the red days to come will cost you.
The 2026-2027 Tempo season began on 1 September 2026 and will end on 31 August 2027. Going by the colours RTE has published up to 18 October 2026, there are 22 red days left out of 22, 43 white days out of 43 and 252 blue days out of 300. Red days can only fall between 1 November and 31 March, Monday to Friday, excluding French public holidays: the next day that can be red is 2 November 2026. White days can still come on any day except Sunday, right up to the end of August. The calculation above multiplies the red days left by the cost of one of your winter days on the tariff of 1 August 2026, to show what is still to pay this winter, and the calendar below it shows every day already published by the grid operator.
The 22 red days left will cost you
€492
that is €354 more than blue days
| One red day | €22 |
| One blue day | €6 |
| The 43 white days left | €311 |
Season 2026-2027 to 18 October 2026, colours published by RTE: 0 red, 0 white, 48 blue.
Sept 26
Oct 26
Nov 26
Dec 26
Jan 27
Feb 27
Mar 27
Apr 27
May 27
Jun 27
Jul 27
Aug 27
Checked by Radif Partners · Editorial policy · Method and sources
Where the 2026-2027 season stands
| Colour | Already published | Left | Season quota |
|---|---|---|---|
| Red | 0 | 22 | 22 |
| White | 0 | 43 | 43 |
| Blue | 48 | 252 | 300 |
The colours come from RTE’s Tempo calendar, read several times a day. A days-left counter is only worth something if it adds up, so at every reading we check that published plus remaining equals the quota, that the three quotas make up the season, and that enough weekdays remain before 31 March to fit the red days still due. As of now, 104 non-holiday weekdays can still turn red, for 22 red days to place.
The red-day window
The regulator’s 2014 deliberation fences red days in: 1 November to 31 March, never on a Saturday, Sunday or public holiday, and no more than five in a row. The earliest day still possible is 2 November 2026. In the calendar above, days to come that could turn red have a red outline; the others can only be white or blue.
How red days were spread in past winters
| Month | Average red days | Most | Seasons with none that month |
|---|---|---|---|
| November | 0.3 | 2 | 9 of 12 |
| December | 3.8 | 8 | 1 of 12 |
| January | 10.6 | 15 | 0 of 12 |
| February | 4.3 | 13 | 2 of 12 |
| March | 2.7 | 13 | 6 of 12 |
January alone takes 49 % of red days, because RTE’s algorithm follows net demand, which peaks when it is cold and the wind drops. November rarely gets any: 9 seasons out of 12 had no red day that month. A stock still full in mid-January does not promise a quiet end of winter: the algorithm uses up the whole stock before 31 March, so the remaining red days then bunch up in February and March.
What the days left mean for your budget
The calculation at the top multiplies the red and white days left by the cost of one of your winter days, at the prices of the 1 August 2026 grid. A Linky reading from a cold day, taken from your online account, gives the most accurate figure. To see what a given day costs as soon as it is announced, check tomorrow’s Tempo colour; for the habits that cut the bill, see the red day guide.