Climate Insights for Kwai Harbour

, Malaita Province, Solomon Islands

Hottest
January
28°C peak
Coldest
August
26°C low
Wettest
February
480mm rain
Best to Visit
Varies throughout year

Climate Overview

The climate in Kwai Harbour is hot. The average annual temperature is 27°C and approximately 3841mm of precipitation falls per year. Kwai Harbour receives a notable amount of rainfall throughout the year, including during its driest month. Kwai Harbour sits near the equator, so seasonal temperature differences are minimal throughout the year.

Temperature

10° 15° 20° 25° 30° Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Max: 28° Average: 27° Min: 26° Feb Max: 28° Average: 27° Min: 26° Mar Max: 28° Average: 27° Min: 26° Apr Max: 28° Average: 27° Min: 26° May Max: 28° Average: 27° Min: 26° Jun Max: 28° Average: 27° Min: 26° Jul Max: 28° Average: 27° Min: 26° Aug Max: 28° Average: 26° Min: 26° Sep Max: 28° Average: 27° Min: 26° Oct Max: 28° Average: 27° Min: 26° Nov Max: 28° Average: 27° Min: 26° Dec Max: 28° Average: 27° Min: 26°
Max
Average
Min

Kwai Harbour has relatively stable temperatures year-round, staying within a 2°C range. The warmest month is January, when average highs reach 28°C and the mean temperature sits around 27°C. August is the coolest month, with minimum temperatures around 26°C and an average of 26°C. Daily temperature variation is modest, with an average difference of 2°C between highs and lows.

Precipitation

0mm 50mm 100mm 150mm 200mm 250mm 300mm 350mm 400mm 450mm 500mm Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Precipitation: 404mm Feb Precipitation: 480mm Mar Precipitation: 418mm Apr Precipitation: 350mm May Precipitation: 281mm Jun Precipitation: 237mm Jul Precipitation: 230mm Aug Precipitation: 257mm Sep Precipitation: 211mm Oct Precipitation: 237mm Nov Precipitation: 317mm Dec Precipitation: 418mm
Precipitation

Kwai Harbour is a very wet location, receiving approximately 3841mm of precipitation annually, which averages out to around 320mm per month. The wettest month is February, averaging 480mm of rainfall. December and March also tend to see above-average precipitation. The driest month is September, with just 211mm. That's 269mm less than February, the wettest month. Rainfall is relatively evenly distributed throughout the year, so there is no pronounced dry or wet season to plan around.

Wind

0km/h 5km/h 10km/h 15km/h 20km/h Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Wind Speed: 16km/h Feb Wind Speed: 20km/h Mar Wind Speed: 15km/h Apr Wind Speed: 14km/h May Wind Speed: 15km/h Jun Wind Speed: 18km/h Jul Wind Speed: 20km/h Aug Wind Speed: 20km/h Sep Wind Speed: 19km/h Oct Wind Speed: 15km/h Nov Wind Speed: 14km/h Dec Wind Speed: 14km/h
Wind Speed

Kwai Harbour is mildly breezy, with an average annual wind speed of 17km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is February, averaging 20km/h, noticeable enough to affect lighter outdoor activities. The calmest conditions occur in November, with average winds dropping to 14km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 6km/h gap between the calmest and windiest months. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 19km/h in winter, 16km/h in spring, 17km/h in summer, 15km/h in autumn.

Seasons

Winter
Dec 21
Spring
Sep 23
Summer
Dec 21
Autumn
Mar 20

89 days until Winter

It is currently autumn in Kwai Harbour, which began on March 20, 2026. Kwai Harbour sits near the equator, so the traditional four-season cycle is less pronounced — temperatures remain relatively stable year-round. The warmest period peaks in January at around 28°C, while the coldest stretch bottoms out in August near 26°C. Winter is next, beginning on June 21, 2026 — 89 days from now.

Spring

Temperatures range from 26 to 28°C. Rainfall is heavy, totalling around 765mm across the season with a monthly average of 255mm. Winds are moderate at around 16km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.

Summer

Temperatures range from 26 to 28°C. Rainfall is heavy, totalling around 1303mm across the season with a monthly average of 434mm. Winds are moderate at around 17km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.

Autumn

Temperatures range from 26 to 28°C. Rainfall is heavy, totalling around 1049mm across the season with a monthly average of 350mm. Winds are generally light, averaging 15km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.

Winter

Temperatures range from 26 to 28°C. Rainfall is heavy, totalling around 725mm across the season with a monthly average of 242mm. Winds are moderate at around 19km/h. A light jacket or sweater is usually sufficient, though cooler evenings may call for an extra layer.

Monthly Climate Data

The table below shows monthly climate averages for Kwai Harbour based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.

Month
Min Temperature
Max Temperature
Wind Speed
Precipitation
Snow
Jan
26 °C
28 °C
16 km/h
404 mm
0 cm
Feb
26 °C
28 °C
20 km/h
480 mm
0 cm
Mar Current
26 °C
28 °C
15 km/h
418 mm
0 cm
Apr
26 °C
28 °C
14 km/h
350 mm
0 cm
May
26 °C
28 °C
15 km/h
281 mm
0 cm
Jun
26 °C
28 °C
18 km/h
237 mm
0 cm
Jul
26 °C
28 °C
20 km/h
230 mm
0 cm
Aug
26 °C
28 °C
20 km/h
257 mm
0 cm
Sep
26 °C
28 °C
19 km/h
211 mm
0 cm
Oct
26 °C
28 °C
15 km/h
237 mm
0 cm
Nov
26 °C
28 °C
14 km/h
317 mm
0 cm
Dec
26 °C
28 °C
14 km/h
418 mm
0 cm
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Metric (°C, km/h)