Two surveys, two different instruments
Both components are explicitly marked provisional and they come from two different instruments. Frontur, the border tourism movements statistic, counts arrivals; Egatur, the tourism expenditure survey, asks about money and reports an average trip length along the way. The same universe, but a count at the border and a sample survey. Multiplying one by the other yields a reasonable estimate, not an official statistic. INE publishes no guest-day figure for the Canary Islands.
The calculation, step by step
10,260,672 arrivals times 7.9 days is 81.1 million guest days for January to August 2026; the published prior-year base, 10,307,160 times 8.3 days, is 85.5 million. The difference is roughly 4.5 million days, 5.2 per cent. The 46,488 missing arrivals cost about 386,000 days at the old trip length, while the trip being 0.4 days shorter costs about 4.10 million days on the new arrival count. Around 91 per cent of the decline therefore comes from length of stay and about 9 per cent from visitor numbers. On the July annex the same calculation gave 71.3 against 75.3 million days: in absolute terms the gap has widened, in percentage terms it has narrowed slightly, from 5.35 to 5.2 per cent.
August shows it most clearly
In the peak month the two lines visibly diverge. Arrivals rose 0.35 per cent to 1,240,248, which is 4,283 more visitors than in August 2025; trip length fell from 8.7 to 8.3 days. Our calculation gives 10.29 million guest days against 10.75 million, about 459,000 fewer: the extra arrivals add about 37,000 days, the shorter trip removes about 496,000. Four tenths of a day is almost ten hours per visitor, and across 1.24 million visitors it is half a million holiday days.
Who notices
A guest day is not an abstract quantity. It is a hotel night, a car-hire day, a dinner, a seat on an excursion boat — and it disappears from all of them at once. The visitor who leaves on Thursday instead of Friday does not book the Friday excursion, does not eat on the island on Friday evening and returns the hire car a day early. A shorter trip pushes the reception desk, the car-hire counter, the restaurant and the excursion operator in the same direction, even in a month with more arrivals. Sector figures are not in these annexes. What can be quantified is the countervailing effect: €201 of daily spending, 5.53 per cent more. The missing 4.5 million days are worth about €900 million at that rate — again our own calculation. That total spending still came in at €16.338 billion, 0.26 per cent above the year before, is precisely why.
Why holidays are getting shorter is not in the data
The annexes offer no explanation, and no authority has put one forward. Air fares, hotel prices, changed booking habits, a different visitor mix — much is conceivable, none of it is established here. Part of the context is that Andalusia has overtaken the Canary Islands on cumulative arrivals, 11,084,168 against 10,260,672, and the Balearics on cumulative spending, €16.367 billion against €16.338 billion; both sit in the same tables and are handled separately. And INE revises: the 0.26 per cent increase implies a prior-year base of €16.296 billion, whereas the 2025 annex reported €16.318 billion.