The contributions of emergent literacy skills to reading and writing development have been evidenced in different linguistic contexts. The worsening of the Brazil literacy scenario during the pandemic denoted the importance of a better understanding of these contributions’ specificities in Brazilian Portuguese to support evidence-based mitigation strategies. This study aimed to analyze the associations between emergent literacy components (emergent writing, alphabet knowledge, vocabulary, and phonological awareness) and word/pseudoword reading and spelling performance in first grade students during COVID-19. A total of 42 children (Mage= 6.29 years, SD = 0.45, 52.4% female) participated remotely in this study. Correlations and multilinear regression analyses were conducted. The results show significant associations between emergent literacy components and reading and spelling performance. Stronger associations were found with specific emergent skills such as letter writing, spontaneous writing, letter-sound production, and alliteration. Regression models indicated that children’s performance in early literacy skills explained 49% of the variance in reading and 55% of the variance in spelling. This study highlighted the role of emergent writing and alphabet knowledge as reading and spelling predictors during literacy acquisition in Brazilian Portuguese. Implications for educational context and directions for remediating the negative impact of the pandemic on learning were discussed.