Grenada

• Grenada’s tropical marine climate delivers consistently warm temperatures year-round, typically ranging from 25°C to 31°C (77°F to 88°F) along the coast.
• A distinct dry season from January to May contrasts with a wetter period from June to December, defined by brief but intense afternoon showers.
• The mountainous interior, including Grand Etang, offers slightly cooler highland air, while coastal areas remain the warmest and most sun-drenched.

Grenada, the southernmost of the Windward Islands, sits comfortably within the tropics and experiences a classic marine climate shaped by the Caribbean Sea and steady trade winds. As indicated by the WeatherBox temperature map, the island’s air temperatures show remarkable uniformity throughout the year. Daytime highs on the coast usually hover between 29°C and 31°C (84°F to 88°F), while nighttime lows rarely dip below 24°C (75°F). Even during the so-called cooler months, you will find the sea breeze keeps conditions from feeling oppressive, making outdoor exploration pleasant. The warmest period tends to be from August to October, when a slight rise in humidity can make the air feel heavier, but the actual temperature increase is modest, often just a degree or two above the annual average. This stability is a hallmark of Grenada’s weather, offering visitors a familiar warmth almost any time they choose to visit.

While coastal consistency is the rule, Grenada’s volcanic topography introduces subtle regional variation that the WeatherBox temperature map helps highlight. The central mountain ridge, anchored by Mount Saint Catherine, creates a modest rain shadow and a slight temperature gradient. Along the leeward southwestern coast, where the famous Grand Anse Beach unfurls its two miles of sun-drenched sand, you will find the warmest and driest spots. The windward side, exposed to moisture-laden trade winds, sees more frequent showers, which feed the lush, spice-scented vegetation of the interior. In the cooler highlands of Grand Etang National Park and Forest Reserve, daytime temperatures can be a few degrees lower than at sea level, offering a refreshing escape for walking among crater lakes and nutmeg groves. Seasonally, the contrast is sharper: the dry season from January to May delivers long stretches of brilliant sunshine ideal for snorkelling the island’s sheltered coves, while the wet season, peaking from June to November, brings afternoon cloudbursts that quickly clear. September and October are the most rain-soaked months, though mornings often remain clear.

These patterns make travel planning refreshingly straightforward. For the most favourable beach weather and low rainfall, aim for the heart of the dry season, especially February through April, when humidity drops and trade winds are steady. The period from late May to early December carries a higher chance of sudden downpours, but also rewards you with dramatically green landscapes and fewer fellow travellers. Pack light, breathable fabrics, sunscreen, and a wide-brimmed hat as your everyday essentials. A compact raincoat or umbrella is wise during the wetter months, though you will likely still enjoy long sunny intervals between showers. Even the most unsettled afternoon drenchings tend to pass quickly, and many visitors find the lush, post-rain atmosphere adds to Grenada’s charm. Whatever season you choose, the island’s stable warmth is a gentle backdrop to its spice markets, waterfalls, and reef-protected bays. For more detailed temperature data and deeper travel planning insights, explore the full WeatherBox temperature map and our companion climate charts.

• Grenada experiences a tropical savanna climate (Aw) with a pronounced dry season from January to May and a humid wet season from June to December.
• Northeast trade winds and the island’s mountainous spine create a sharp rain shadow, leaving the southwest coast much drier than the rain-drenched interior.
• Year-round warmth and stubbornly high humidity demand light, breathable clothing, with a raincoat essential for the wetter months.

Grenada basks in a classic Caribbean climate shaped by its position at 12°N latitude. The Köppen climate classification map reveals a dominant tropical savanna climate (Aw) across most of the island, characterized by distinct wet and dry periods and warm temperatures all year. However, the central highlands, anchored by Mount St. Catherine, generate enough orographic lift to support a pocket of tropical rainforest climate (Af), where rainfall is abundant and greenery explosively lush. Coastal temperatures typically range from 24°C to 30°C (75°F to 86°F), while the higher interior can feel noticeably cooler, especially when moist trade winds sweep the slopes. High humidity is a constant companion, but the steady breeze off the Atlantic Ocean makes conditions feel more comfortable, particularly on windward shores.

Geography is the master key to understanding Grenada's rainfall patterns. The prevailing northeast trade winds deliver a generous supply of moisture to the eastern and northern flanks of the island, nourishing the dense rainforest around Grand Etang and the Grenville area with annual rainfall that can exceed 3,500 mm (138 inches). By contrast, the southwest coast, including the popular Grand Anse Beach and the capital St. George’s, lies in a pronounced rain shadow, enjoying significantly sunnier skies and lower rainfall totals. The dry season, from January through May, delivers gloriously clear skies and lower humidity, making it the best window for exploring spice plantations and historic harbours. The wet season runs from June to December, with a peak in tropical downpours between September and November, when passing tropical waves can deliver heavy but typically short-lived rain. Grenada sits just south of the main hurricane belt, so direct strikes are rare, but indirect swells and occasional gusty weather can occur.

For travellers, this climate translates into two distinct experiences. The dry season, especially February to April, coincides with the prime period for enjoying the dazzling sands of Grand Anse and the sun-drenched waterfront of St. George’s with minimal interruption. The wet season paints the interior in glowing emerald tones, filling waterfalls like Annandale Falls and creating good conditions for photographers and nature lovers, though you will want a lightweight raincoat and quick-drying fabrics. Pack light cotton or linen, high-SPF sun protection, and insect repellent regardless of season. At WeatherBox, we offer monthly climate charts, rainfall trends, and the full Köppen classification map to help you pinpoint your ideal travel window. Whether you arrive for the spice-scented breezes of the dry months or the dramatic cloudbursts of the wet season, knowing Grenada’s rain shadow quirks and seasonal pulse gives you a genuine edge in planning a comfortable visit. Explore our data on WeatherBox for deeper insights before you go.