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East Rennell

Nature Reserve

Lake Tegano and surrounding rainforest on this raised coral atoll offer endemic birdlife, canoeing and remote camping; access usually involves charter boats from Rennell Island.

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In this guide

East Rennell essentials

Address: East Rennell, Rennell Island, Solomon Islands
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About East Rennell

East Rennell is the southern portion of Rennell Island in the Solomon Islands and is a UNESCO World Heritage natural site recognised for its raised coral atoll landscape, endemic species and cultural continuity. The area combines a forested limestone plateau with steep coastal cliffs and an interior lagoon system.

The core feature is Lake Tegano, a large brackish lake set within the raised coral structure that supports mangroves, distinctive freshwater and marine-influenced ecosystems, and a range of endemic plants and birds. The island’s habitats are important for biodiversity and for the traditional lifestyles of local communities.

The site lies on Rennell Island in the southern Solomons and comprises lowland forest, coastal terraces and the central lake; it is located several hundred kilometres southeast of the national capital, Honiara.

  • Lake Tegano significance: Lake Tegano is the largest lake in the insular Pacific and is central to the site’s ecology and cultural life, hosting unique aquatic and shoreline species.

What to See#

  • Lake Tegano: **Lake Tegano** - a large central lagoon within East Rennell that occupies a raised coral limestone basin and supports brackish-water habitats and mangrove-fringed shores.
When to Go

Best Time to Visit East Rennell

Visit in the drier months (roughly May-October) for easier access and fewer heavy rains.

Dry season (best for access)
May-October · 24-29°C
Drier conditions, easier overland and boat access and fewer heavy downpours-good for fieldwork and visits.
Wet season (rainier, cyclone risk)
November-April · 24-31°C
Warmer with frequent heavy rain and higher humidity; the region can be affected by tropical storms and logistical access may be harder.

Weather & Climate near East Rennell

Climate

East Rennell's climate is classified as Tropical Rainforest - Tropical Rainforest climate with consistently warm temperatures year-round. Temperatures range from 20°C to 31°C. Heavy rainfall (3166 mm/year), wettest in January, distributed fairly evenly throughout the year.

Air Quality: AQI 22 Good
Best Time to Visit
DecemberJanuaryFebruary
Temperature & Rainfall
Temperature Range
30°
Warmest Month
24°
Coldest Month
Monthly Conditions
Month Comfort Temp Feels Rain Sky Humidity Wind UV Daylight
January Good 23° - 29° 26° 334 mm overcast 81% 1.9 m/s 2.7 extreme 12.6h
February Good 23° - 29° 26° 326 mm overcast 81% 1.7 m/s 2.8 extreme 12.4h
March Good 23° - 30° 26° 312 mm overcast 82% 2.2 m/s 2.6 extreme 12.1h
April Good 22° - 30° 26° 267 mm overcast 82% 2.3 m/s 2.2 extreme 11.7h
May Good 22° - 29° 26° 244 mm overcast 82% 2.1 m/s 1.8 very high 11.5h
June Good 21° - 29° 25° 225 mm overcast 82% 2.1 m/s 1.5 very high 11.3h
July Good 20° - 28° 24° 239 mm overcast 82% 2.3 m/s 1.6 very high 11.4h
August Good 20° - 29° 25° 282 mm overcast 81% 2.5 m/s 2.0 very high 11.6h
September Good 21° - 30° 25° 252 mm overcast 82% 2.1 m/s 2.2 extreme 11.9h
October Good 22° - 31° 26° 208 mm overcast 82% 2.1 m/s 2.5 extreme 12.2h
November Good 22° - 31° 26° 222 mm overcast 82% 1.6 m/s 2.6 extreme 12.5h
December Good 23° - 31° 27° 255 mm partly cloudy 81% 1.8 m/s 2.7 extreme 12.7h
Getting There & Around

How to Get to East Rennell

East Rennell is remote. The usual gateway is Honiara (Solomon Islands capital); domestic flights operate from Honiara to Rennell Island’s main airstrip at Tigoa (service is limited and seasonal). From Tigoa you must continue by local road and/or boat to reach East Rennell (Lake Tegano) - travel is by unpaved tracks, 4x4 and coastal/lagoon boats and can take several hours.

Visitors should plan for irregular transport, arrange local guides or charter transport in advance, and expect overland/boat transfers rather than paved roads.

Tips for Visiting East Rennell

  • Expect remote access: East Rennell is reached by local boat and requires permission from the provincial authorities and the island's customary owners-arrange transport, permits and a locally based guide in advance (usually from Rennell's main settlements) rather than trying to self-organize on arrival.
  • Plan your visit for the Solomon Islands' dry season (roughly May-October) when sea conditions are calmer and trails around Lake Tegano are more passable; during the wet season boat crossings and inland tracks become much harder.
  • Respect community rules and conservation measures: guided visits keep impact low and are the only practical way to visit many of the lake's shoreline sites safely and with the necessary local support.