When I swim, if I just get out of the pool and dry off, it only takes me a minute to fully dry off.
If I take a poolside outdoor shower to get the chlorine off and then dry off, it takes considerably longer to dry off.
This confuses me - getting fully emersed in water should get make me more soaked… but the shower seems to get me more soaked…
I often think about this when taking a shower after swimming… the paradox of water
OP mentions fully submerged so the hair should not matter.
But even then, it’s very likely that your head left the water long before the rest of you.