Malmo Harbour Heliport (JMM) has no passenger lounge, and the reason sits in the kind of facility it is rather than its size. JMM is a helicopter landing site serving Malmo's harbour district in southern Sweden, built for rotorcraft operations rather than scheduled airline traffic, so there is no departures hall, no security queue, and no ticketed passenger flow of the kind a lounge exists to serve.
For genuine lounge access on a trip through this stretch of Scandinavia, the real anchor is Copenhagen Airport (CPH), across the Oresund strait and reachable from Malmo by the Oresund Bridge and the cross-border train in well under an hour. Copenhagen is Scandinavia's busiest air hub, and its lounge picture matches that role: SAS runs its own lounges there for premium-cabin passengers and elite frequent flyers, and additional card-network and pay-in options sit alongside them, arrangements worth confirming with SAS or your card issuer before you fly, since terms shift season to season.
Travellers based in Malmo itself have a second option in Malmo Airport, the city's own scheduled-service field south of town and a separate facility from the harbour heliport. Its lounge offering is modest next to Copenhagen's, so check directly rather than assuming a Copenhagen-level facility. For most itineraries touching this part of the Oresund region, Copenhagen remains the meaningful lounge destination, while the harbour heliport itself stays purely a rotorcraft operation with nothing resembling a passenger terminal.
If your journey starts at JMM for a helicopter transfer and continues by fixed-wing flight, plan any lounge time around the Copenhagen end of the trip rather than expecting anything at the heliport itself. Confirm your specific SAS status, partner-airline status, or card-network membership against Copenhagen's current lounge directory before travelling, since a short helicopter hop across the harbour is not the leg where lounge planning belongs, and Malmo Airport is a modest fallback if you would rather stay on the Swedish side.