Salt marshes are coastal wetlands that are considered to be a potential natural source of methane (CH₄). By controlling the production, oxidation, and transport of CH₄ in soils, tidal action drives the episodic and high-magnitude emissions of CH₄ from coastal wetlands. Using the eddy covariance technique, we measured the CH₄ fluxes, environmental factors, and tidal dynamics in a salt marsh in the Yellow River Delta in China. We aimed to investigate the dynamics of CH₄ emissions in the growing season and to analyze the effect of tidal action on CH₄ emission. The results showed that the mean daily methane was 0.063 mg m^-2 h^-1, ranging from -0.36 to 0.57 mg m^-2 h^-1, during the growing season. Tidal flooding and the wet stage after tides are the significant sources of CH₄. Drying and wetting cycles induced by short-term tides resulted in pulsed CH₄ emissions. Therefore, the soil drought and wetting induced by increasing temperatures and precipitation distribution under climate change will positively impact CH₄ emissions and the carbon cycle in the region.