When to Visit Antigua and Barbuda

Antigua and Barbuda sits in the northeastern Caribbean, right where the Leeward Islands catch the Atlantic trade winds, and that geographic position shapes everything about the weather here. The twin-island nation has a tropical maritime climate, which in practice means warm year-round with relatively modest temperature swings. Measured in Saint John's, the main city on Antigua, daytime highs range from about 28°C (82°F) in the cooler months to 31°C (88°F) at the peak of summer. Nighttime lows rarely dip below 22°C (72°F), so if you are expecting anything resembling a cold snap, Antigua and Barbuda is not the place for it. The trade winds, though, are the secret ingredient. They blow steadily from the east for much of the year, taking the edge off the heat in a way that somewhere like, say, inland Guatemala simply cannot match. The year divides broadly into two seasons rather than four. The dry season runs from roughly December through April, when rainfall in Saint John's drops to around 46 to 71 mm per month and the humidity tends to hover in the high 60s to low 70s as a percentage. Then comes the wet season, building through May, peaking from September to November when monthly rainfall can exceed 130 mm, and tapering off again in December. Interestingly, the wettest stretch overlaps with the Atlantic hurricane season, which officially runs from June through November. Antigua and Barbuda does not get hit every year. But the islands sit squarely in the hurricane belt, and September and October are the months when the risk is most real. That said, even during the wet season, rain typically arrives in short, heavy afternoon bursts rather than daylong grey skies, so you might get drenched for twenty minutes and then find yourself back under blazing sun. One thing that makes the climate here distinctive compared to wetter Caribbean neighbours is that Antigua and Barbuda is relatively dry overall. The islands lack the mountainous interior that wrings rain out of the trade winds on places like Dominica or Saint Lucia. Barbuda, being low and flat, is drier still. This means the landscape leans more toward scrubby woodland and salt ponds than lush rainforest, and it is part of why Antigua has earned its reputation for reliable beach weather.