Climate & Weather Guide · Solomon IslandsClimate & Weather Guide in Solomon Islands
Climate zones, seasonal temperatures, rainfall patterns, and best travel times
The Solomon Islands have a hot, humid tropical maritime climate with very little seasonal temperature change. Most areas are classified as tropical monsoon or tropical rainforest climates under Köppen-Geiger, with consistently warm conditions, high humidity, and frequent rainfall through most of the year. The wettest period is typically from November to April, when northwest monsoon flows can bring heavy rain and occasional flooding, while May to October is usually somewhat drier but still humid. For residents and expats, the climate is warm year-round, with coastal locations feeling sticky and lush, and higher-elevation inland areas offering slightly cooler conditions.
Summer Average
27-31°C
Winter Average
25-29°C
Climate Types
Tropical monsoon and Tropical rainforest
3000-5000 mm
1,800-2,400 hrs/yr
75-90%
Regional Climate Variations
Guadalcanal and Honiara Coast
This is the most populated and familiar climate zone for many expats. Coastal Guadalcanal, including Honiara, is hot and humid all year, with only a small seasonal shift in temperature. Rain falls in every month, but the wet season from November to April is especially intense. The lowlands can feel muggy and tropical, while nearby hills and volcanic slopes are slightly cooler and wetter than the coast.
Warm, sticky, and lush, with frequent showers, bright tropical light between rain spells, and a strong wet-season feel.
Malaita and Central Islands
Malaita and the central island groups have a very humid equatorial-maritime climate with abundant rain and limited temperature variation. Conditions are generally warm day and night, and cloud cover is common. The climate supports dense vegetation and productive gardens, but heavy rainfall can disrupt travel on unpaved roads and smaller transport links. Compared with the coast of larger towns, the interior and windward slopes can feel noticeably wetter.
Consistently tropical and moist, with a green landscape, damp air, and rain that can arrive in heavy bursts or long spells.
Western Province and North-Western Islands
The western islands are strongly influenced by maritime weather, with warm temperatures, high humidity, and frequent rainfall throughout the year. Seasonal contrasts are modest, but the wet season can bring very heavy rain, stronger winds, and rough sea conditions. Many islands here experience a classic tropical monsoon pattern, though rainfall distribution can vary from one island to the next depending on exposure to prevailing winds and local topography.
Humid and ocean-influenced, with a warm, rain-fed feel that keeps the region green and sometimes saturated for much of the year.
Choiseul and Northern Island Chains
Northern island chains such as Choiseul remain warm year-round, but local rainfall can vary more depending on elevation and exposure to monsoon winds. The climate is still distinctly tropical, yet some areas experience short drier breaks relative to the wettest islands. Coastal communities usually feel hot and humid, while inland hills can be cooler and receive more frequent showers. Overall, the climate is comfortable for tropical living but requires adaptation to persistent moisture.
Steamy, tropical, and rain-prone, with a balance of bright coastal warmth and frequent inland cloud and showers.
The Solomon Islands are broadly a hot, humid tropical country with very small temperature differences between seasons and persistent rainfall. For residents and expats, the main appeal is lush scenery and warm seas, while the main adjustment is coping with humidity, heavy rain, and occasional weather disruptions during the wet season.
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