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Hull Gauge
Sheet 4592 · recomputed 5 Nov 2026, 03:30 UTC

9.4 m motor boat by Windy · built 1995–2019 (boats seen)

Windy
31 used price guide

Gauge Value
Indicative · 8–24 boats
£53,500€63,500$69,500

Middle half £42,500€51,000$54,000 – £128,000€150,500$166,500

median asking price of 15 boats listed since Nov 2020, in today's prices · asking, not sold

Watch

9.45 mbeam 2.99 mfull specification

A used Windy 31 asks a median of £53,500€63,500$69,500 across 15 boats listed since Nov 2020, in today's prices. Half sit between £42,500€51,000$54,000 and £128,000€150,500$166,500.

01

The field

Each number is one boat: its asking price in thousands of pounds, at today's market level, set above the year it was built. Tap a number to see the boat behind it. The price scale is logarithmic: each step up is the same percentage.

15 boats by year built · asking prices in £ thousands, in today's prices · listed since Nov 2020 · asking, not sold · log scale
15 boats is too few to draw a middle line. We draw one once 20 boats span six build years.
02

Your boat

Estimated from the boats above. No email, no broker call.

Listed in
optional, in pounds
Gauge Estimate · Indicative
£45,000€54,500$57,500

Likely range £43,000€51,000$54,500 – £52,500€62,000$66,500

9 comparable boats built 1996–2002 · hours not given · all markets · asking, not sold

Add your asking price to see where it sits among boats like yours.

03

By year built

Median from five boats; middle half from ten. Below that we print nothing rather than a guess. Linked years have their own page with that year's boats. The spread is drawn on the field's logarithmic scale, in pounds.

YearBoatsMedianMiddle halfSpread
20191—too few boats
20181—too few boats
2016–20170—none listed
20151—too few boats
2013–20140—none listed
20122—too few boats
2003–20110—none listed
20021—too few boats
20011—too few boats
20002—too few boats
19991—too few boats
19982—too few boats
19970—none listed
19962—too few boats
19951—too few boats

Too few boats to fit a depreciation rate yet. We fit one once 20 boats span six build years.

04

What moves the price

Each factor compares boats of the same age, so a newer boat's premium isn't counted twice. Five boats or more on each side, or we say so.

Age

Too few boats to fit an age rate yet.

—we fit one once 20 boats span six build years
Other factors

Too few boats to compare factors yet: we need five on each side of a split.

—engine hours, VAT, where it's listed, engines, fuel and hull, each age for age

Asking prices, not sold. Factors can overlap, so treat these as a guide to what the market asks, not a formula.

05

Time to sell

114days

listed so far: the median of 7 boats seen on two or more dates

80%

have cut their asking price: 4 of 5 boats seen at least 14 days apart

—

median size of a cut · withheld: fewer than five cuts to measure

These are asking prices, and asking is not selling. Days listed so far is not time to sell: a boat still listed has not sold, and we do not yet record when a listing ends. We have not measured how far sale prices land below asking; the methodology says what we can and cannot measure.

06

Cost to keep

A year on a South Coast marina berth, insured at the Gauge Value, in pounds. An estimate from published rates, not a quote.

Depreciation—not estimated: no published depreciation curve for this model
Berthing£5,000annual band for the region, Lake Yard marina berth, 8-10 m; Marina berth, South Coast · Lake Yard price list 2026 · BerthFinder
Maintenance and repairs£4,0005% to 10% of a value of £53,500 a year (maintenance, older boats) · Boatsetter
Lift-out and antifoul£4509.4 m at the cited rate per metre (Lake Yard: lift, hold, pressure wash, relaunch, plus antifoul labour) · Lake Yard price list 2026
Insurance£5500.5% to 1.5% of a value of £53,500 a year · Velos Insurance; Admiral Yacht Insurance
Engine servicing—not estimated: labour rates are cited, but no source publishes the hours a service takes
A year of ownership, before depreciation£10,000 £830 a month

Fuel is not included: no cited source gives the engine hours a typical owner runs in a year.

08

Questions about the Windy 31

How much is a used Windy 31 worth?

The median asking price is £53,500, from 15 boats listed since Nov 2020, in today's prices; half sit between £42,500 and £128,000. For a specific boat, use Your boat above.

How long does a Windy 31 stay on the market?

We do not measure time to sell yet. Across 7 boats seen on two or more dates, the median time between first and last sighting is 114 days so far. 80% of 5 boats seen at least 14 days apart have cut their asking price.

How fast does a Windy 31 lose value?

Too few boats have been listed to fit a rate yet. We fit one once 20 boats span six build years.

Are these sold prices?

No. They are asking prices observed on public listings, restated at today's market level. We have not yet measured how far sale prices land below asking, so we do not publish a figure for it.

09

About the Windy 31

The boats behind this page were built between 1995 and 2019 and have been listed since Nov 2020, most often in the UK market. 80% of the boats seen at least 14 days apart have cut their asking price.

How we measure: we read public listings from brokers and marketplaces, count a boat once when it appears on several sites, store its asking price each time it changes, and restate older asking prices at today's market level. We never republish a listing, a photograph or a seller. Every figure is recomputed nightly and dated; below five boats we publish nothing. The 15 boats here were listed in the UK and Europe. Full methodology

Length overall
9.45 mfrom listings · 9 boats
Beam
2.99 mfrom listings · 7 boats
Built
1995–2019from listings · 15 boats
Type
Motor boatour classification