The Catechism in Questions & Answers

211. Was the Holy Spirit still active after the time of the early Apostles?

Yes, the Holy Spirit has been active right into our time. This is how we experience the presence of God.
The Lord Himself made reference to the future activity of the Holy Spirit: “However, when He, the Spirit of truth, has come, He will guide you into all truth; [...] whatever He hears He will speak; and He will tell you things to come” (John 16: 13).