With device dimensions shrinking to the micro- and nanoscale, convective heat transfer at interfaces plays an increasingly important role in determining the overall thermal performance. Unlike bulk systems dominated by conduction, suspended or ultrathin structures interact strongly with surrounding air or gas molecules, introducing complex heat exchange mechanisms that are difficult to characterize accurately. This chapter presents Raman-based methods for quantifying convective heat transfer across micro- and nanoscale systems, ranging from suspended microwires to two-dimensional (2D) materials and nanoscale hotspots. Section 4.1 introduces the fundamentals of convective heat transfer. Section 4.2 details the steady-state Raman mapping method, which enables characterization of convective heat transfer coefficient and thermal conductivity of the wire simultaneously. Section 4.3 focuses on characterizing convective effects in 2D structures, while Sect. 4.4 explores heat convection at nanoscale hotspots, where localized heating effect drive unique air–solid interactions.