Historical overfishing, three marine heatwaves in two decades and locally concentrated recreational effort have left parts of the Tasmanian abalone fishery below levels the standard harvest control rule can rebuild alone. Blacklip abalone, Haliotis rubra, form a weakly connected metapopulation with highly localised larval dispersal, so depletion in one patch is not buffered by recruitment from elsewhere. The fishery's empirical harvest control rule manages ordinary recruitment variability well, but has no mechanism forcing a hard closure or fixed rebuilding timeline when an acute shock pushes a stock below safe levels. Additionally, the catch rate signal is itself vulnerable to hyperstability, where fishers concentrating on the last productive patches hold catch rates up even as the broader population collapses. We present a Recovery Plan built as a companion to the existing harvest strategy, adding a rebuilding trigger and a hard closure reference point, with closure and re-opening rules tested by management strategy evaluation (250 simulation runs per scenario, 30 year projections from 2021) using the Western Zone blacklip fishery as a case study. The required closure period depends on disturbance pattern: a single moderate heatwave needs around 8 years to re-open without triggering a further closure, a repeated moderate heatwave event needs around 16, and a single severe event around 14. Shortening the closure period to allow earlier access does not simply bring forward a smaller catch. The simulations show it increases the likelihood of a second, or third, closure cycle, so reopening early at a low catch allocation results in more cumulative years closed than committing to the full closure period from the outset. This is the practical challenge for harvest strategies operating across competing user groups under climate change: the more restrictive option is, counterintuitively, the higher-catch one, and that needs to be communicated clearly to industry.