Looked it up quickly and found this:
Esperar que followed by a verb: Esperar que is typically followed by a verb (although the verb may have a subject). If that verb is in the subjunctive mood, esperar can often be understood to mean "hope," while if that verb is in the indicative mood, it usually can be understood to mean "expect." (The distinction between the two isn't always precise, however, so you still need to pay attention to context.)
Note, for example, the difference in meaning between "Espero que va a ganar el torneo," which means "I expect he will win the tournament," and "Espero que ganes el torneo," "I hope you win the tournament. The use of the indicative mood (va a) in the first sentence suggests some degree of certainty, while the subjunctive mood of the second indicates desire. The use of the subjunctive following esperar que is far more common than not.
Some examples with possible translations:
Espero que no nieve. I hope it doesn't snow.
El presidente espera que no sea necesario incrementar la supervisi?n de los sistemas financieros. The president hopes it won't be necessary to increase oversight of the financial systems.
Espera que no es f?cil. He expects it isn't easy.
Estaba yo en casa y esperaba que lloviera. I was at home and I hoped it would rain.
Esperan que biocombustibles tengan ?xito en Am?rica Central. They are hoping that biofuels will be successful in Central America.
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It should be noted that the use of the subjunctive after que is very common, and that it is not unusual for esperar que to mean "expect" if the context so demands. For example, take this sentence that appeared in Spanish news media: Los ciudadanos no esperan que ETA declare una tregua en los pr?ximos meses. The context of the story made clear that the sentence should be understood to mean "Citizens don't expect (not "hope") that the ETA will declare a truce in the coming months." And a sentence such as "?Porqu? no esperabas que te llamaran? can mean "Why didn't you hope they would call you?" or "Why didn't you expect they would call you?" depending on the context.