I came across a site which lists the types of "si" clauses. The one I'm confused with is "si" + present verb. It says the resulting clause will either be in the present, future, or imperative. My question is: can the resulting clause either be present/future? As in, can the two tenses be used interchangeably without changing the meaning of the sentence?
Si j'ai le temps, je jouerai au frisbee le weekend.
Si j'ai le temps, je joue au frisbee le weekend.
Do the two sentences have the same meaning? Is one of them grammatically incorrect?