Here are two types of boat safaris offered while at Nyerere National Park. The short 2-3 hour sunset or dawn boat safari trips along the Rufiji River outside the reserve (so no entry permit needed), or full-day boat safaris which explore the Rufiji river as well as the lakes of the Selous. The short boat safari can be done in the morning or in the afternoon. In the morning you have beautiful light (unless it is cloudy), but in the afternoon there is a greater chance of seeing crocodiles because temperatures are higher. An afternoon boat safari has the advantage you sail during sunset.

Minimum: 4 pax
Time: 2 Hours

See National Park Fee here