Trend forecasting works by turning observed signals — runway looks, retail sell-through data, search interest, street photography, and cultural markers — into reports that brands buy eighteen months to two years before a season reaches stores. The modern trade began in 1970, when Li Edelkoort founded Trend Union in Paris after working in the forecasting trade, and the largest agency operating today, WGSN, was founded in 1998 in London and now serves the industry with continuously updated data products, per the companies' published histories. Forecasts are expectation, never certainty — and this magazine reports them; it does not issue its own.
The craft's core proposition is time-shifting. A designer deciding spring 2027 in the spring of 2025 cannot buy certainty about what will sell; what an agency sells is structured early vision — a defensible argument about direction, made from evidence gathered closer to the source than any single brand's team can reach.
What evidence do forecasters actually use?
Four streams, each with its own horizon. Runway analysis: agencies count silhouettes, colors, and fabrications across the women's and men's calendars each season, producing the tallies behind "the shift toward X across three seasons" claims. Retail and sell-through data: what actually sold, at what markdown, by region — the grounding that keeps forecasts commercial. Street and social observation: documented through agency fieldwork and search-interest series, the fastest-moving stream. Cultural signals: exhibitions, film, music, and design fairs, read for the mood that gives a silhouette its moment. A forecast is the synthesis: the agency triangulates the four and commits to a direction with a stated horizon.
The tier system orders the whole machine. Signals first appear at couture and luxury runways, migrate through designer and contemporary tiers, and reach the mass market seasons later — the trickle timeline the industry has worked from since the mid-twentieth century, now compressed but not erased.
Who are the forecasters, and what do they sell?
A small set of names dominates. WGSN and its color partner Coloro sell subscription data platforms used by the largest groups. Trend Union and Edelkoort's later publications sell the essay-style books that set mood directions. Peclers in Paris, doneger?: beyond — the agencies differ in method more than in coverage, per their published offerings. Independents consult one-to-one inside houses, and several agencies' color calls anchor the material pipeline — dyers and mills plan against the shared color platforms two years out, which is the quiet reason a season's palettes converge.
Where does forecasting fail?
Where its horizon outruns the culture. The documented failures share a shape: a forecast built on the luxury tier's signals, issued for a mass market whose mood shifted — the post-2008 corrections, when forecasted opulence met a recession, are the standard case. The second failure mode is self-reference: when enough brands buy the same report, the forecast causes the trend, and the industry converges on directions no consumer asked for. Agencies acknowledge the loop; nobody has solved it. Where forecasts conflict, this desk reports the conflict — a 2024 color season in which the major agencies named neighboring warm hues was read as confirmation; a season in which they scatter is read, by buyers, as a hedge signal.
What should a reader do with a forecast?
Three habits sort the useful from the decorative. Check the horizon — a forecast without a stated season is a mood, not a forecast. Check the evidence base — a named data stream (runway counts, sell-through) beats an assertion. Check the interest — agencies serve paying clients, including brands whose campaigns then "confirm" the call, a circularity the trade lives with and readers should know about. Applied with those three checks, a forecast is the industry's best early argument about direction. Without them, it is copy.
What the record establishes is a trade built on evidence, sold on time. What it cannot do is guarantee the season — the buyer, not the report, holds that vote.
For more context, read How a Color Becomes the Color of the Year.
For more context, read The Luminous Blue Turn For Spring 2027.