Grenada lies at about 12 degrees north, at the southern end of the Windward Islands, and almost everything about sailing here follows from that position. The north-east trade winds blow for most of the year, the open Atlantic lies upwind, and the island itself throws a long wind shadow over its western and south-western coasts. What changes through the year is the strength and angle of the trades, how often squalls and tropical waves cross the island, and how much swell arrives from distant storms.
Sailors who plan by the calendar rather than by a single forecast tend to have better passages. A crossing to Carriacou that is a brisk reach in April can be a wet slog in January and a motor in October. The notes below describe typical patterns rather than guarantees; a given week can break any of them, so always check a current marine forecast before leaving the anchorage.
December to February: the Christmas winds
From around mid-December the trades usually strengthen and settle into the east-north-east. Sailors in the Eastern Caribbean call this spell the Christmas winds, and it can run on into February. Sustained winds of 18 to 25 knots are common for days at a time, with stronger gusts off headlands and down the valleys on Grenada's leeward coast. The sky is often clear between passing rain showers, and the air is at its least humid of the year.
The sea is the bigger story. A long fetch of strong wind builds a short, steep chop in the channels, and the stretch between Grenada and Carriacou can be uncomfortable for smaller boats heading north. Winter storms far up in the North Atlantic also send long-period swell south. When it arrives, anchorages open to the north and north-west, such as Hillsborough on Carriacou, can become rolly or untenable, while the south-coast bays of Grenada stay largely protected.
For charter guests this season is exhilarating rather than dangerous on a well-found boat, but it rewards early reefing, shorter daily legs and a plan to sit out the windiest days in a sheltered bay.
March to May: the most dependable sailing
Spring is often described as the sweet spot. The trades typically ease into the 12 to 20 knot range, swing slightly more easterly and blow with fewer interruptions. Rainfall reaches its lowest point, visibility is long, and squalls become less frequent. A beam reach up the leeward coast of Grenada and across to Carriacou is at its most pleasant, and the return south becomes a comfortable broad reach rather than a race against breaking crests.
This is also the end of the dry season, so the islands look browner, water supplies on Carriacou can be tighter, and Saharan dust sometimes turns the horizon milky, which reduces visibility for sights and photography but rarely affects the sailing itself.
Because conditions are reliable, spring is a good time for less experienced crews to attempt the longer hops, including the run north into the Grenadines of St Vincent. The main seasonal caution is the sun: with steady wind and few clouds, crews underestimate exposure on long legs, so shade and water matter as much as sail trim.
June to August: tropical waves and squalls
The pattern changes in June. The wet season usually starts around June, and the trades tend to back towards the east and east-south-east. Average strength drops, but the wind becomes less steady, and tropical waves begin crossing the region every few days. Each wave can bring a day or two of cloud, rain and shifting wind.
Squalls are short and sharp. A squall line under a dark, flat-bottomed cloud can bring a sudden jump to 30 knots or more, a wind shift of 30 to 60 degrees and a curtain of rain that hides the land. Most pass within twenty minutes to an hour. The standard response is to reef before the cloud arrives rather than when it hits.
Lulls follow squalls. Behind a squall the wind often collapses to almost nothing for a while, and sometimes fills back from a different direction. Boats anchored close together can swing in opposite ways, so leave more room than in winter.
Hurricane season is officially open. The Atlantic hurricane season runs from 1 June to 30 November. Grenada sits near the southern edge of the usual storm tracks, which is why many yachts spend the season here, but direct hits do happen: Ivan in 2004, Emily in 2005 and Beryl, which devastated Carriacou and Petite Martinique in July 2024. Summer sailing means checking the tropical outlook every day, not just the local forecast.
September to November: light air, heat and watchfulness
The late season tends to bring the lightest and least predictable winds of the year. Days of 5 to 10 knots from the south-east, flat seas and heavy, humid air are common, interrupted by thunderstorms and by any tropical system passing to the north. Sailing for pleasure becomes a matter of early starts to catch the morning breeze, and many crews accept that a passage will be mostly under engine.
Light air has its own hazards. With little wind, boats drift on the current, which in this region generally sets towards the west and north-west and can strengthen in the channels between islands. A motor failure on a calm day off the leeward coast is less dramatic than a squall but can still put a boat a long way from where the crew expected to be.
By late November the trades usually begin to rebuild from the north-east, the rains taper off, and the first charter fleets return to full operation. Many long-stay cruisers time their departure north for December, once the hurricane season has formally ended and before the Christmas winds have fully set in.
Forecasts, wind shadows and mistakes to avoid
Most wind surprises in Grenada come not from the forecast being wrong but from local effects the forecast cannot show. Before relying on a number, consider these:
- The leeward coast is gusty, not calm. North of St George's, the trades funnel over the mountains and down valleys, so a boat can sit in near-calm and then be knocked flat by a gust off the next headland. Keep the mainsheet in hand along that shore.
- Headlands accelerate wind. Point Salines, Glover Island and the south-eastern points tend to concentrate the trades; expect a step up of several knots as you round them.
- Forecast averages hide gusts. A forecast of 18 knots with gusts to 28 is a reefing forecast for most cruising boats, not a pleasant day.
- Wind against current makes rough water. When the trades strengthen against a set in the channels, short seas build quickly, especially around Kick 'em Jenny and Isle de Ronde.
- Use more than one source. Grib-based apps, regional meteorological services and the morning cruisers' radio net each catch things the others miss. When they disagree, plan for the worse case.
- Watch the tropics in summer even on a fine day. A system several hundred miles east can still send swell and squalls ahead of itself.
Planning passages around the seasons
The seasonal pattern suggests a simple planning rule: make the long upwind or exposed legs when the trades are moderate, and save the downwind legs for when they are strong. In practice that means heading north from Grenada into the Grenadines in spring or on a lull in the Christmas winds, and enjoying the stronger winter trades on the return south, when wind and sea are behind you.
Daily timing matters as much as the month. On many days the trades are a little lighter at dawn and build through late morning, and squalls in the wet season often cluster in the afternoon and overnight. An early start on a crossing to Carriacou usually gives a calmer sea and arrival in good light for the reef-fringed approaches.
Allow weather days in any plan. A charter week with no spare day forces crews to sail in conditions they would otherwise avoid, and that is when gear breaks and people get hurt. One spare day in seven is a reasonable minimum in winter; in summer, keep the flexibility to stay put while a tropical wave passes.
Frequently asked questions
What is the best month to sail in Grenada?
March, April and May are usually the most dependable, with steady moderate trades, little rain and long visibility. December to February offers stronger, more exciting sailing with rougher channels. Summer and autumn bring lighter, shiftier winds and the hurricane-season risk, though many people still sail then with care.
How strong are the Christmas winds in Grenada?
They typically bring sustained trades of around 18 to 25 knots from the east-north-east, sometimes for a week or more, with stronger gusts near headlands and on the leeward coast. Combined with the swell they build in the channels, they make reefing early and planning shorter legs sensible.
Does Grenada get hurricanes?
Grenada lies near the southern edge of the main hurricane tracks, so the risk is lower than further north, but not zero. Hurricane Ivan in 2004 and Hurricane Beryl in 2024, which hit Carriacou and Petite Martinique, show that major storms can strike. Monitor the tropics daily from June to November.
Which way does the current run around Grenada?
The general set in the south-eastern Caribbean is towards the west and north-west, typically under two knots but stronger at times in the channels and around headlands. Local eddies near the coast can run differently, so check your track over the ground rather than assuming a fixed set.
Is the sea calmer on the west side of Grenada?
The leeward west coast is sheltered from the trade-wind swell, so the water is usually much flatter than on the Atlantic side. The trade-off is gusty, shifting wind coming off the mountains, and occasional winter north swells that roll into bays open to the north-west.
