Looks like a gravid female rain spider(Palystes spp. in the family Sparassidae)!!
These are amongst our largest spiders, rivaling baboon spiders (African tarantulas) in
legspan but not related to them at all. They are harmless to people and their
domesticated animals.
Rain spiders are in a family of spiders distributed throughout the world, commonly called
huntsman spiders, the scientific name for the family is Sparassidae. Our rain spiders are in
the genus Palystes with 17 species described from southern Africa and 12 known from
South Africa. The most commonly seen in and around our homes and gardens throughout
the country is Palystes superciliosus and on the Cape Peninsula Palystes castaneus. Other
species are smaller and less often seen.
Rain spiders range in size from 15 - 40 mm. This measurement is body length - omitting
leg span. Once they unfold their legs they can span up to around 100 mm - that's a BIG
spider! It is really nice to know that they are harmless to humans.
They are nocturnal wandering hunters, and do not build webs. Although they normally live in
vegetation, they often come indoors at night to hunt insects attracted to our lights which can
cause quite a stir because of their impressive size. Rain spiders do not mature for two or
three years and can live for up to four years. Males are a little slimmer than females, with
smaller abdomens but longer legs. Females lay between 50 and 300 eggs in a grayish,
cushion-like egg sac. The sac, covered with leaves and held together with silk, is hung in
vegetation and guarded by the mother spider. The spiderlings emerge after about three
weeks and cluster together under their mother's protection before they finally disperse.