Sera 33
SE-RA oy · Eivind Still · 1997
Updated
The Sera 33 is a 10.06 m displacement racing yacht designed by Eivind Still and built by SE-RA oy, first launched in 1997. It races in Class C.
Length
10.06 m
33′ 0″
Beam
3.27 m
Draft
1.83 m
Displacement
4.8 t
Sail area
51 m²
On the podium
Where a Sera 33 finishes when she goes racing.
0
Wins
0
Seconds
0
Thirds
4
Starts
Not enough races yet for a percentage — these are the counts so far. We keep collecting results, so this will fill in.
Read from 4 starts by 1 boat between 2026, counting races with six boats or more.
Recent regattas
The latest events where a Sera 33 was on the start line, named as the organisers publish them.
Helsinki-Kotka Race2026- Emäsalon lenkki2026
- Emsalö Runt2026
- Kalasoppa Race2026
Raced one we are missing?
Report a regattaRound the buoys, or offshore
A short windward-leeward and a night at sea ask different things of a boat. Here is how this one does in each.
Round the buoys
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Not enough data yet: no races of 10 NM or less carry a published distance.
Offshore & coastal
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Not enough data yet: no races over 10 NM carry a published distance.
Who she races against
The designs a Sera 33 actually lines up with, most often first. The bar shows how those meetings ended.
Met too few times for a figure:
X-99 (2 meetings), Finngulf 37 (2 meetings), J/88 (2 meetings), X-332 (1 meeting), Inferno 31 (1 meeting), Dehler 30 OD (1 meeting), Finngulf 33 (1 meeting), Ridas 35 (1 meeting), Linjett 32 (1 meeting), Xp 33 (1 meeting), Swan 371 (1 meeting), Inferno 29 (1 meeting)
Speed at every angle
The shape of this design's speed, drawn from the measured fleet. Pick a wind and watch it stretch.
Upwind VMG
4.88
39°
Beam reach
7.79
90°
Broad reach
8.67
135°
Downwind VMG
7.16
170°
Speed in knots at 20 knots of true wind. Green marks the angles that pay: the closest useful beat and the deepest run worth sailing.
Where it wins and where it pays
Every boat is judged against its own measurements — length, weight, sail area. The quicker those say it should be, the more it has to deliver just to break even. Going fast is not enough: it has to go faster than its own numbers promised.
There is no obvious weak spot here. It rewards preparation and crew work more than it rewards picking the right day.
Where it gains
Its best ground is on the beam in a working breeze, where it does more than its size and sail area promise, and by a margin worth having. It holds that advantage cracked off as well, so the gain is not down to one leg of the course.
Where it pays
It falls short running deep in a strong breeze, giving away time it never gets back. That is a displacement hull working to its designed speed.
Above the line it delivers more than promised and gains on the fleet. Below, it falls short. Move the wind: plenty of boats sit on one side in the light and the other when it blows.
Full width is 0.4 kn either way.
At 10 knots this design makes back more than its rating asks on the beam reach.
How fast is a Sera 33
Boat speed in knots, by true wind angle and wind strength.
| Angle | 6 kn | 10 kn | 14 kn | 20 kn |
|---|---|---|---|---|
| Beat VMG | 3.05 | 4.22 | 4.78 | 4.88 |
| 52° | 4.69 | 6.21 | 6.81 | 6.97 |
| 60° | 4.96 | 6.43 | 6.99 | 7.20 |
| 75° | 5.15 | 6.61 | 7.18 | 7.54 |
| 90° | 5.37 | 6.94 | 7.43 | 7.79 |
| 110° | 5.44 | 7.04 | 7.76 | 8.50 |
| 120° | 5.28 | 6.96 | 7.71 | 8.87 |
| 135° | 4.70 | 6.61 | 7.45 | 8.67 |
| 150° | 3.96 | 5.92 | 7.01 | 7.96 |
| Run VMG | 3.42 | 5.12 | 6.17 | 7.16 |
How they are set up
The range each sail spans across the fleet.
Nearly all carry a folding propeller. A bowsprit is standard across the fleet. Crew weight is declared around 320 kg.
Rigging
Sera 33 rig and sail dimensions
A Sera 33 carries 12.24 m of mainsail hoist on a 4.01 m boom, a forestay 11.64 m above the deck and a 4.38 m bowsprit. Typical figures across the 2 boats measured under the current VPP, with the range each one spans.
Rig
Sails