Climate & Weather Guide · SamoaClimate & Weather Guide in Samoa
Climate zones, seasonal temperatures, rainfall patterns, and best travel times
Samoa has a hot, humid tropical maritime climate with very small seasonal temperature variation and a clear wet season from roughly November to April. For residents and expats, the main climate realities are persistent warmth, high humidity, and abundant rainfall, especially on windward slopes. Historical climatology from the World Bank Climate Change Knowledge Portal describes Samoa using recent 1991-2020 data, while regional climate reports and climate summaries indicate mean daily temperatures around 27 C and annual rainfall commonly near 2,900-3,000 mm, with much higher totals in wetter uplands. The country is small, so climate differences are driven more by elevation and exposure to trade winds than by latitude or distance.
Summer Average
27-30°C
Winter Average
25-27°C
Climate Types
Tropical rainforest and Tropical monsoon
2500-7000 mm
2,200-2,800 hrs/yr
75-85%
Regional Climate Variations
Upolu Windward Coast and Highlands
This is the wettest and most humid part of Samoa, exposed to southeast trade winds that lift moist air over the island’s slopes. Rain falls frequently through the year, and vegetation stays lush and dense. Temperatures remain warm day and night, but higher elevations feel slightly cooler and more comfortable than the coast. The climate is best described as tropical rainforest, with extremely abundant rainfall in some locations and only a modest dry season. This zone suits people who like green landscapes and do not mind frequent showers and very high humidity.
Warm, steamy, and intensely green, with frequent showers and the most consistently tropical feel in the country.
Upolu Leeward Coast and Apia Area
The leeward side of Upolu, including the Apia corridor, is still humid and warm but generally somewhat drier than the windward slopes. Rainfall is lower here because the island blocks part of the prevailing moisture, though showers remain common and heavy downpours can still occur during the wet season. Conditions are tropical and comfortable for people who prefer slightly less rain than the exposed coast. This area is often the most practical for expats because it combines the main urban center, services, and access to the drier side of the island.
Still lush and tropical, but a bit less drenched than the windward coast; hot, humid, and manageable by Pacific island standards.
Savai'i Coastal Belt and Interior Slopes
Savai'i has a broadly tropical climate similar to Upolu, but local rainfall varies strongly with exposure and elevation. Coastal areas are warm year-round, while interior and higher-slope areas receive more frequent rain and feel slightly cooler. The island’s size is modest, so there is no true climate contrast like in large countries, but rainfall gradients are noticeable enough to matter in daily life. Expect a humid tropical environment, green landscapes, and a wet season that can bring prolonged rainy spells. This region offers a more rural and spacious setting than Upolu.
Warm and humid with a rural island feel, frequent rain showers, and greener conditions inland than along the coast.
Samoa is a small, climatically homogeneous tropical island country, so residents should expect warm temperatures, high humidity, and abundant rainfall across most of the country. The main practical differences are between wetter windward slopes and somewhat drier leeward coasts, with the Apia area and other leeward settlements often feeling the most livable for expats who want services plus a slightly less rainy climate.
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