Can You Sail Into the Wind? Upwind Sailing

No sailboat can sail directly into the wind. A typical cruising yacht can sail at about 45° to the true wind; inside that angle, the no-go zone, the sails just flap. To reach a point upwind you beat to windward: sail close-hauled on one tack, then tack and sail close-hauled on the other, zigzagging towards your goal.

A large cruising yacht sailing upwind, heeled over with sails sheeted in tight — Close-hauled: as close to the wind as the sails will work. Photo: Klaus Andrews, CC BY-SA 3.0.

The no-go zone

Inside the no-go zone the sails can't fill. Every other direction is a point of sail.

Racing boats point higher, about 35° to 40°; a heavy cruiser or a boat with baggy old sails may manage only 50° or more. Point too high and the front of the sails lifts and flutters; bear away a little until the telltales stream evenly.

How does a sailboat sail upwind?

A sail sheeted in at an angle to the wind works like an aircraft wing standing on end. Air flowing round the curved sail is faster on the leeward side, creating lower pressure there, which produces lift: a force roughly at right angles to the sail. On its own that force would push the boat mostly sideways.

The keel turns it into forward motion. The keel resists sideways movement through the water, so the sideways part of the force mostly heels the boat, and the forward part drives it ahead. That's why sailboats lean when going upwind and why a boat without a keel or centreboard can't sail to windward.

Forces on a yacht sailing upwind: the total force from the sails splits into a forward drive and a larger sideways heeling force, which the keel resists — Most of the sails' force is sideways. The keel resists it, so the boat heels, and the smaller forward part drives it.

A little leeway remains: even a good keel lets the boat slip sideways by 3° to 10° when close-hauled, more in rough water or at low speed. Allow for it on the chart, as covered in the course to steer guide.

How to beat to windward

Beating to windward diagram: a dashed zigzag course from a start to a windward mark with tacks marked at each turn — Beating: close-hauled legs about 90° apart, with a tack at each corner.

Sheet both sails in hard and head up until the front of the jib just starts to flutter, then bear away slightly. You are close-hauled.
Steer by the telltales, not the compass. Small wind shifts change your best course.
When the goal is roughly abeam on the other side, tack (see how to tack and gybe).
Sail the new tack close-hauled and repeat.
Use the favoured tack: the one that points you closest to your goal. A wind shift that lets you point closer (a lift) is a reason to stay on that tack; a header is a reason to tack.

How to trim for sailing upwind

Upwind trim, from light to strong wind.
Control	Light wind	Strong wind
Jib sheet	Slightly eased for power	In hard, or reef/furl the jib
Jib car	Forward (more depth)	Aft (flatter, twists the top open)
Mainsheet	Firm but the top batten parallel to the boom	In hard; spill wind with the traveller
Traveller	Up to windward of centre	Down to leeward to depower
Backstay / outhaul	Eased for a fuller sail	Tight to flatten the sails
Heel	Some heel helps the sails set	Reef when the boat heels past about 20°

Use wind shifts: lifts and headers

A lift lets you point closer to your goal; a header forces you off it. A header on one tack is a lift on the other.

Close-hauled, the wind is never perfectly steady. If it shifts so you can point higher (a lift), stay on that tack. If it shifts so you must bear away (a header), that's the moment to tack: the same shift is a lift on the other tack. Watch the compass heading as you sail by the telltales; a change of 5° or more is a real shift.

Tide and beating

Tidal stream makes a big difference upwind. With the stream running against the wind (wind over tide), the sea is short and steep but the stream carries you upwind. With the stream on your lee bow (pushing on the leeward side of the bow), it pushes you up towards your goal. Plan long beats to go with the tide. Work out how the stream changes over the passage with the tide calculator.

A worked example

Your destination is 6 miles dead to windward. Your yacht sails at 6 knots close-hauled at 45°. Your speed made good towards the goal (VMG) is about 6 × 0.7 = 4.2 knots, so it takes about 1 hour 25 minutes. Add 5° of leeway and a 1-knot foul tide and the VMG drops to about 3 knots: roughly 2 hours. Wait for the tide to turn and the same beat could take under 1 hour 15 minutes.

How long does it take?

Because each leg is about 45° off the direct line, you sail roughly 1.4 miles through the water for every mile you gain to windward, more once leeway and tidal stream are added. A 10-mile beat in a 6-knot yacht can easily take three hours instead of under two.

Points of sail at a glance

Points of sail and how to trim.
Point of sail	Angle to the true wind	Sails
In irons (no-go zone)	0–45°	Flapping: can't sail
Close-hauled	About 45°	Sheeted in hard
Close reach	About 60°	Eased slightly
Beam reach	90°	Eased about halfway
Broad reach	About 135°	Well out
Run	180°	Fully out; watch for an accidental gybe

Looking down from the masthead at a yacht running downwind under a multicoloured spinnaker — The other end of the scale: running downwind with a spinnaker, the wind straight behind. Photo: Ermell, CC BY-SA 4.0.

See the full set in points of sail explained and try each angle in the sail trim tool.

Related guides

Frequently asked questions

Can a sailboat sail directly into the wind?

No. Sails stop working within about 45° of the wind on a cruising yacht (the no-go zone). Boats reach upwind destinations by zigzagging close-hauled, tacking at each turn.

How close to the wind can a sailboat sail?

About 45° for a typical cruising yacht, 35° to 40° for a racing yacht, and 50° or more for heavy or old-fashioned boats.

Why do sailboats lean when going upwind?

The sails' lift pushes partly sideways. The keel stops the boat sliding sideways, so that force heels the boat instead, while the forward part drives it ahead.

Is it faster to sail upwind or downwind?

Boat speed through the water is often highest on a reach. Upwind you go slower and have to zigzag; downwind can feel slow because the apparent wind is lighter.

What is leeway?

The sideways slip of a sailing boat through the water, caused by the wind. Close-hauled it is typically 3° to 10°, more in strong winds or at low speed.

What is a lift and a header?

Wind shifts while close-hauled. A lift lets you point higher towards your goal; a header forces you to bear away, and is usually a good moment to tack.

What is VMG?

Velocity made good: your speed directly towards your goal (or directly upwind). Close-hauled at 45°, VMG is about 70% of boat speed.

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