Key Summary- Ghana’s climate is overwhelmingly tropical savanna (Aw), with a compact tropical monsoon (Am) pocket in the far southwest, both defined by a seesaw between a wet and a dry season.
- The south sees two rainy peaks each year, while the north experiences a single extended wet season, all steered by the northward and southward migration of the Intertropical Convergence Zone.
- The dry harmattan wind from the Sahara sweeps in from December to February, bringing cooler overnight temperatures, hazy skies, and a dusty but comfortable travel window.
Ghana sits just a few degrees north of the equator along West Africa’s Gulf of Guinea coast, which gives the entire country a fundamentally hot and humid tropical character. In the Köppen climate classification, nearly all of Ghana falls under tropical savanna (Aw), a climate where a pronounced dry season contracts with a concentrated rainy period, and temperatures remain stubbornly high year-round. The exception is a small zone in the far southwest, near the border with Côte d’Ivoire, classified as tropical monsoon (Am). There, annual rainfall totals are heavier and the dry season shrinks dramatically, nourishing Ghana’s last remaining rainforest patches. Across the country, the weather rhythm is driven by the seasonal push of moisture-laden winds from the Atlantic, which clash with the continental dry air from the interior. Our maps and charts on WeatherBox illustrate how this produces a landscape that swings from dusty, sun-scorched savanna to drenched, luminous green within a matter of weeks.
Where you travel in Ghana determines which version of this tropical rhythm you will meet. Along the southern coastal belt, including the capital Accra, the historic forts of Cape Coast, and the canopy walkways of Kakum National Park, the rainfall runs in a bimodal pattern. The main rains arrive from April to June and a second, shorter wet spell follows in September and October, with a relative lull in July and August. The coastal plain east of Accra sits in a drier rain shadow and feels more parched, with frequent dazzling sunshine even when the west is cloudy. Move north toward the savanna city of Tamale or the wildlife-rich Mole National Park, and the pattern simplifies into one long wet season from May to September and a near-rainless dry season for the rest of the year. This northern dry period coincides with the harmattan, a northeasterly wind that carries fine Saharan dust, softening temperatures overnight but often blurring distant views and sunsets under a milky haze.
For travellers, the most consistently comfortable stretch spans November through March, when the dry season is at its peak across the whole country. Humidity drops, roads remain passable, and animals congregate around scarce waterholes in Mole National Park, making wildlife spotting exceptionally rewarding. The harmattan haze can mute long-range coastal panoramas, yet the cooler early mornings feel gentle for exploring open-air markets and colonial-era forts. The wet season from April to October turns the countryside vibrantly green and thins the tourist crowds, but high humidity and sporadic torrential downpours can disrupt dirt-road travel, and biting insects become more prevalent. Packing light, breathable fabrics, robust sun protection, and a sturdy rain jacket will serve you well no matter the season, while closed-toe footwear helps with muddy trails in forest reserves. Ghana’s climate is direct and seasonal, offering a long, dry window ideal for first-time visitors. To fine-tune your dates with monthly temperature and precipitation trends, browse our detailed Köppen maps and data on WeatherBox.
