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NoBites Abroad · Destinations · Kenya · Maasai Mara
Quick Briefing · MRE

Are there mosquitoes in the Maasai Mara? Few in migration season, and tsetse bite by day.

Disease risk ElevatedBites Noticeable
  • CDC Level 1 Global dengue (Kenya listed; 2026 activity on the coast and in the northeast)
  • Travel clinic CDC recommends medicine or vaccines for some areas · which ones
Rated for Jun–Sep tripsFull picture ↓

July to September is the dry season, and mosquitoes in the Mara tend to be light. The CDC still recommends malaria medicine and yellow fever vaccine for the reserve, and by day the biter you'll notice on game drives is the tsetse fly.

By NoBites Abroad·Updated October 2026·4 min read

Yes, though a July–September migration trip lands in the dry season, when mosquitoes in the Mara tend to be light. The CDC recommends both malaria prevention medicine and yellow fever vaccine for the reserve, so the travel clinic comes first. On game drives, the insect you'll notice is the tsetse fly, which bites by day.

Disease risk ElevatedCDC recommends both malaria medicine and yellow fever vaccine for the Mara; Kenya is on CDC's global dengue list, with 2026 activity on the coast and in the northeast.
Bite nuisance NoticeableDry-season mosquitoes are usually light; tsetse bite by day in bushy pockets and along the river, and mosquitoes take over from sundown.
CirculatingMalaria (every camp)Tsetse bites by dayTick-bite fever (walks)2026 dengue on the coast and northeastNo chikungunya vaccine advised
CDC noticesLevel 1 · Global dengue (Kenya listed; 2026 activity on the coast and in the northeast) · CDC
Travel clinicCDC recommends malaria medicine for all of Kenya below 8,200 ft (2,500 m), game parks included, and yellow fever vaccine for travelers 9 months and older; the Mara is not among the vaccine exceptions. See a travel clinic 4–6 weeks before departure.
Jun–Sep tripsDry season and migration season. Mosquitoes are usually light and daytime tsetse are the bite you'll notice; a wet spell changes that. The short rains, roughly from October, and the long rains, roughly March–May, tend to bring more mosquitoes. CDC's advice applies in every month.
Data checkedOctober 2026 · sources

Two CDC recommendations, one clinic visit

What CDC says: its Kenya page gives the malaria areas as "All areas (including game parks) <2,500 m (<8,200 ft) elevation; rare cases in the highly urbanized central part of the city of Nairobi (the capital)" and lists "Atovaquone-proguanil, doxycycline, mefloquine, tafenoquine." For yellow fever: "Vaccine is recommended for all travelers ≥9 months old except as follows." The exceptions are trips limited to Nairobi, the former North Eastern Province or most of the former Coast Province, so a Mara safari is covered by both. What we suggest you do with this: book a travel-medicine appointment 4–6 weeks before departure, bring every camp and your dates, and settle both questions in one visit. Our malaria-zone checklist covers everything around the prescription.

Kenya doesn't require the yellow fever vaccine on a direct trip from the US. Tanzania, Zanzibar included, requires proof from travelers arriving from a country with yellow fever risk, so settle the certificate question before a Mara-then-Zanzibar trip. Kenya also has a CDC Level 1 notice, posted October 19, 2026, for Ebola cases in Nairobi; Ebola isn't spread by insects, and the notice lists the usual precautions.

Tsetse: the daytime biter

The Mara's signature biter is the tsetse fly. It bites by day, can get through thin fabric, and is drawn by host odor and movement, which is why tsetse follow moving vehicles. Glossina swynnertoni, a species largely confined to the Serengeti–Mara ecosystem, is most active from late morning into mid-afternoon and tapers toward dusk, according to a 2017 study. In Serengeti and Mara field trials published in 2013, blue cloth targets caught the most of that species, and blue-black targets also drew heavy landings. Leave dark blue and black at home and wear khaki or olive long sleeves on game drives.

Sleeping sickness is less clear-cut. The CDC's Kenya page does not list it, while studies report rare human cases near the Mara. A 2021 survey found trypanosomes in 2.4% of tsetse trapped in the reserve, mostly a livestock parasite and none of the types linked to human disease. A 2024 veterinary report describes the Mara area as having "rare cases of human sleeping sickness." For a visitor, that is one more reason to avoid tsetse bites.

Sundowners and the tent

Malaria mosquitoes bite from dusk to dawn, and in the Mara that covers the sundowner, dinner and the walk back to your tent. Reapply repellent at sunset and change into long sleeves. In a tented camp, the tent is your screen. Check that the door zips close fully and the bed net has no holes, and keep the tent zipped from late afternoon. On walking safaris, tuck trousers into socks and check for ticks afterward; the CDC's Kenya page lists African tick-bite fever.

Even in the dry season, a wet spell brings mosquitoes back. The short rains, roughly from October, and the long rains, roughly March to May, tend to bring more. Our Kenya briefing covers Nairobi, Amboseli and the coast, and the Tanzania briefing covers the Serengeti side of the migration.

Where you're going

safari

Maasai Mara National Reserve

Disease risk ElevatedBite nuisance Noticeable

Both CDC recommendations apply here, for malaria medicine and for yellow fever vaccine. Tsetse turn up in bushy pockets by day, and from sundowners on, the malaria routine takes over.

safari

Mara River crossings

Disease risk ElevatedBite nuisance Noticeable

Riverine woodland and buffalo country, and the infected tsetse in a reserve study had fed on hippos and buffalo. Long midday waits for a crossing overlap the tsetse's active hours, so wear neutral long sleeves.

safari

Mara North, Olare Motorogi & Naboisho

Disease risk ElevatedBite nuisance Noticeable

Conservancy stays tend to add walking safaris and night drives, which means more time in long grass and in the dusk-to-dawn hours. Tuck trousers into socks on walks and check for ticks afterward.

The Mara kit

Two items cover a migration safari.
  • Permethrin 0.5% for safari clothes: treat neutral-colored long sleeves, trousers and socks at home 48 hours before you fly. It goes on clothing, never on skin.
  • Picaridin 20% travel sprays for exposed skin at sundowners and before dawn drives. One 3.4 oz bottle covers about a week for one person.
Permethrin → Carry-on trio → Full rankings

What travelers report

Paraphrased from TripAdvisor threads and reviews and linked so you can read them in full. None carries a year, and rain changes the picture from one trip to the next.

  • Maasai Mara

    In a thread on tsetse flies and sleeping sickness, posters said sleeping sickness in Kenya is confined to the Nyanza area in the far west, well away from the tourist parks, and treated tsetse as a minor issue for Mara visitors. TripAdvisor ↗

  • Amboseli and Maasai Mara · January

    A January visitor reported seeing no mosquitoes in Amboseli or the Mara. TripAdvisor ↗

  • Masai Mara Manyatta Camp · late October

    A late-October guest saw few mosquitoes but warned that holes in the tent-door zippers and the state of the bed nets could be a problem at other times of year. TripAdvisor ↗

One rule outlasts the trip. Any fever during or after your trip means a doctor visit, and you tell the doctor you were in the Maasai Mara, along with any tsetse bites. With malaria in the picture, the rule holds for a full year after you get home.

Traveler questions

Do I need malaria pills for the Maasai Mara?

The CDC recommends malaria prevention medicine for all areas of Kenya below 8,200 feet (2,500 m) and names the game parks explicitly, so every Mara camp is covered in every month. The only exception on its Kenya page is the highly urbanized center of Nairobi. Which medicine fits you is a call for a travel clinic, made 4–6 weeks before departure with your full route. Our malaria-zone checklist covers the rest of the preparation.

Do I need a yellow fever vaccine for a Mara safari?

The CDC recommends it for travelers 9 months and older going to Kenya, with exceptions only for trips limited to Nairobi, Mandera, Wajir, Garissa or the former Coast Province counties other than Taita-Taveta. The Mara isn't on that list. Kenya doesn't require the vaccine on a direct trip from the US. If you continue to Zanzibar or mainland Tanzania, expect to need the certificate: Tanzania requires proof from travelers arriving from a country with yellow fever risk. Our Zanzibar briefing covers that leg.

Can tsetse flies in the Mara give you sleeping sickness?

The CDC's Kenya page does not list African sleeping sickness. Studies report rare human cases near the Mara: a 2024 veterinary report describes the area as having rare cases of human sleeping sickness, and a 2021 survey found trypanosomes in 2.4% of tsetse trapped in the reserve, though none of the types linked to human disease. Avoiding tsetse bites covers it. If you get a fever after the trip, tell the doctor about the Mara and any tsetse bites.

Are there many mosquitoes in the Mara in August?

Usually not. July to September is the dry season, and mosquitoes tend to be light unless a wet spell leaves standing water. Malaria mosquitoes still bite from dusk to dawn in every month, so repellent at sundowners, long sleeves for dinner and a closed tent and net at night stay part of the routine.

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