The rains, honestly

Amboseli in the rains: the green season, month by month

Amboseli's rain comes twice, short rains in November and December and long rains from March to May, and even then it is a dry park by East African standards. The rains lay the dust, can put water back on the dry lake bed and fill the swamps with migrant birds. They also send the herds out onto the ranches and halve some lodge rates.

If you only want the answer

Amboseli has two green seasons. The short rains of November and December bring about 47 and 40 mm and the first migrant birds; the long rains run from March to May and peak in April at about 72 mm, when every lodge that publishes its seasons charges its lowest rate (1 April to 31 May). The trade is real: the herds spread out onto the group ranches and many lions leave the park, and the KWS fee stays at $90 a day. Come in the rains for birds, quieter circuits, elephant calves and low prices; come between July and October for game density.

Two rainy seasons, and what they actually deliver

Amboseli measures about 350 mm of rain in an average year, a mean of 346.5 mm at the research station over 25 years from 1976, and almost all of it falls in the two wet seasons. The short rains run from November into January, with a short dry spell in February, and the long rains from March to May. From June to October rain almost never falls.

The figures in the table are small by the standards of most safari parks. Even April, the wettest month, averages about 72 mm, and the short rains bring about 47 mm in November and 40 mm in December. The year-to-year range is wide, though: the station recorded 132 mm in its driest year and 553 mm in its wettest.

Temperature does not decide anything. The warmest green-season month, March, averages 28.3°C in the afternoon and the coolest, December, 26.3°C, with nights between 17.5°C and 18.6°C.

Month	Average max	Night low	Rainfall	Season
November	26.5°C	17.9°C	About 47 mm	Short rains
December	26.3°C	17.8°C	About 40 mm	Short rains, festive peak from about 20 December
March	28.3°C	18.6°C	About 38 mm	Long rains arrive
April	27.6°C	18.6°C	About 72 mm	Long rains, the wettest month
May	26.4°C	17.5°C	About 43 mm	Long rains tailing off

Monthly rainfall is approximate: the measured annual mean of 346.5 mm (Altmann et al. 2002) spread across the months in the proportions of three climate model series. Temperatures are Open-Meteo climate normals for 1991 to 2020.

What rain does to Amboseli: lake, swamps and dust

The most visible change is on the floor of the basin. Lake Amboseli is a seasonal playa of about 300 square kilometres, dry for most of the year, that floods in the wet season, and KWS lists the flooded lake basin and the flamingos it attracts among the park's attractions. KWS's management plan aims to keep enough flood water in the lake to maintain that flamingo and waterfowl spectacle. Which flamingo species come, and how often the lake fills, is not published, so count them as a wet-year bonus.

The rain also lays the dust that defines the dry months. Expert Africa describes first impressions at the airstrip in the dry season as a bleak dust bowl, and Tawi Lodge asks guests to bring dust covers for cameras and binoculars; the rains settle it. Kilimanjaro is a mixed story: April, November and December have the cloudiest mornings of the year on modelled data, about one in ten clear, but Expert Africa notes that the summit carries its heaviest snow from March to May and in November and early December.

Water can also go where it is not wanted. The Longinye swamp has been expanding and has flooded parts of the Ol Tukai enclave and closed tourist circuits, and KWS's plan records that floods can close viewing roads and the airstrip, with extreme flooding in December 2019.

Wildlife in the rains: dispersal, calves and birds

Dry-season Amboseli works because the two spring-fed swamps are the only permanent water in the basin. Rain cancels that. A peer-reviewed study of the ecosystem found that most of the park's large mammals rely on the surrounding group ranches for wet-season grazing, lions normally move out of the park in the wet season, and the zebra and wildebeest spread across the plains towards Tanzania and Kajiado. Expect fewer animals per hour, and expect the wildlife page's sighting bands to drop a level.

Elephants are the exception that makes the long rains interesting. Their births peak from March to June, May was the peak month in 2025, and the youngest calves are easiest to see from April to July. Several large families commute between Selenkay Conservancy and the central swamps, so the calves turn up on the swamp circuits as well as on the ranches.

Birds are the other reason to come. From October to December local birds are joined by migrants such as European storks, the Palearctic waders stay into March, and a flooded lake bed can bring flamingos. Over 400 species are recorded in the park.

The short rains: November and early December

November is the most interesting green month on price because the lodges cannot agree what season it is. Tawi Lodge prices it as low season, Tortilis Camp as mid season ($491 per person sharing, full board, against $715 in high season) and Ol Tukai Lodge as high season ($580 per double room, full board, against $650 in peak). The migrants are arriving and the dust has gone.

December splits in two. Until about 20 December you get green-season conditions at mid-season rates at Tortilis and Tawi. From 20 December at Tortilis, 21 December at Tawi (on its 2025 bands) and 24 December at Ol Tukai, the festive peak begins and runs into early January, so the last ten days of the year combine short-rains weather with the highest prices of the year.

Safarilink's low season runs from 1 November to 15 December. Its fares do not change, but its afternoon Amboseli flights do not operate in the low season, and every service needs at least four passengers all year, so check the schedule before you fix your dates.

The long rains: cheap, quiet, and a trade-off

From 1 April to 31 May every lodge that publishes its seasons is at its cheapest. Ol Tukai Lodge, inside the park, charges $380 per double room on full board against $650 in peak season, and Tortilis Camp $317 per person sharing against $715, which is 44 per cent of the high-season rate. Porini Amboseli Camp in the Selenkay Conservancy closes altogether from 15 April to 31 May.

Nothing official gets cheaper. The KWS conservation fee stays at $90 per non-resident adult for each 24 hours in April exactly as in August, and the vehicle fee at KSh 600 a day; the full card is on the entry fees page. Our costs page prices complete trips.

March is the gentler version: hot, with the rains usually arriving during the month, still mid season at most lodges and busier over Easter. May is the value month of the long rains, about 43 mm against April's 72, green, at the lowest rates of the year, with elephant calves on the swamps.

Road reality in the rains

The approach roads are partly tarmac. The C102 from Emali is tarmac to Kimana town and to the Mbirikani junction, but the last 21 km to Iremito Gate and the roughly 50 km from Namanga to Meshanani Gate are gravel, and those are the stretches to watch after heavy rain. Inside the park the roads are gravel or unclassified viewing tracks.

Two park rules turn wet roads into a planning question. Off-road driving is strictly prohibited, so a flooded section cannot be driven around, only waited out. And the KWS card charges KSh 10,500 for a vehicle recovery inside the park. KWS does not publish a vehicle requirement for Amboseli, but a high-clearance vehicle in the dry season and a 4x4 in the rains is the sensible rule.

Who should skip the rains

First safari, few days. The dry-season concentration on the swamps is exactly what rain switches off; July to October is your window.
Photographers here for Kilimanjaro. The wet months have the cloudiest mornings of the year.
Anyone in a 2WD car, or on an itinerary with no slack for a closed track.
Bargain hunters aiming at the last ten days of December, which bring green-season weather at peak-season prices.
Guests set on Porini Amboseli Camp in late April or May, when it is closed.

If you come anyway: the short checklist

Hire a 4x4 and drive your loops early, leaving afternoons flexible.
Prepay your park fees on KWSPay; KWS's recent fee cards describe park payments as cashless.
Ask at the gate or your lodge which circuits are open before setting off.
Bring binoculars for the migrants and the flooded lake bed.
Book May rather than April if you want the low rates with less rain.