A320
Air Traffic Control Fully Certified
Air Traffic Control Time Certified In Pos 1 (yrs) 16
Situational Awareness
Inflight Event / Encounter Unstabilized Approach; Inflight Event / Encounter Weather / Turbulence; Inflight Event / Encounter Wake Vortex Encounter
Air Traffic Control Issued New Clearance; Air Traffic Control Provided Assistance; Air Traffic Control Separated Traffic; Flight Crew Executed Go Around / Missed Approach; Flight Crew FLC complied w / Automation / Advisory
Aircraft; Weather
Aircraft X was in-trail of a B737-900 who had just gone around. About a 2.5 mile final; I observed Aircraft X climbing out of 1200 feet and they stated they were going around for a wind shear alert on board the aircraft. I gave standard missed approach procedure and shipped them to departure control. I advised the next three or four arrivals and the single departure I had about the report and all others stated the wind was calm and they had no encounter.  When Aircraft X came back around; I explained to them that they were behind a B737-900 that had gone around; and I suspected that they had encountered wake turbulence from this aircraft; as we have heard the newer generation of aircraft can have quite a nasty wake turbulence generated from the efficient wing. They acknowledged and landing having encountered no wind at all on final.I could only recommend that when I advised them the preceding arrival went around; I would have reiterated that it was a B737-900; however; this may have meant not a thing to the pilot upon receipt. I just don't know what information they are being provided regarding aircraft wake anymore.
An aircraft initiated a go-around due to a wind shear alert in the cockpit. The reporter thinks it may have been Wake Turbulence generated by a preceding B737-900.