Intimate partner femicide (IPF) and attempted intimate partner femicide (AIPF) are severe forms of violence and global phenomena occurring in all societies worldwide. However, explaining IPF and AIPF is a complex and challenging endeavor. This article delves into the evolution of IPF and AIPF in Portugal during and after COVID-19, seeking to comprehend the underlying explanatory factors through a comprehensive strain-based approach. IPF rates during the COVID-19 pandemic have remained relatively stable, comparable to those observed before the pandemic, following a pattern akin to that documented in other countries. However, a significant increase in AIPF occurred during the COVID-19 pandemic, and a slight uptick in IPF indicators was noted toward the end of the pandemic period (2022). Perpetrators faced various strains, such as separation and financial difficulties, along with experiencing emotions like anger, jealousy, anxiety, and depression, leading to instances of IPF and AIPF. The COVID-19 crisis and associated restrictions introduced additional strains, including social isolation, economic losses, anxiety, and widespread fear, which may contribute to psychological distress, stress, and depression, thereby heightening the likelihood of committing IPF and AIPF. The pandemic restrictions also resulted in limited access to support and protection services, hindering victims from seeking help. Establishing a contingency plan for use in future crises (including pandemics) is imperative to promote support for victims and prevent situations of IPF and AIPF.