Is Poaching the Same as Boiling?

The Short Answer

Poaching and boiling are not the same technique, and the difference comes down to water temperature. Poaching keeps water well below its boiling point, roughly 70-85°C (158-185°F), while boiling means water at a full 100°C (212°F) rolling surface. Simmering sits between the two, just under the boiling point and above poaching temperature.

Reading the Bubbles

The three stages look different on the stovetop before you ever check a thermometer. Poaching water barely bubbles at all; simmering shows small, steady bubbles without ever building toward a rolling boil; a full boil covers the whole surface in large, vigorous bubbles and visible turbulence.

Why Delicate Food Needs the Gentle Version

Eggs, fish and fruit fall apart or dry out easily under harsher cooking methods, which is exactly why poaching is reserved for them. The low, steady heat lets protein set without pulling out too much moisture, keeping shape and juiciness intact — something a rolling boil's turbulence can easily undo.

Poaching liquid is also traditionally aromatized as court-bouillon: water, salt, white wine, vegetable aromatics such as carrot, onion and celery, and an acid like vinegar or lemon juice that helps pull flavor from those aromatics during the short cooking time. Plain boiling water rarely carries that same aromatic role.

Which One, For What

Poach eggs, fish fillets and syrup-cooked fruit when the goal is to keep their shape intact. Reach for a simmer for stocks, sauce reductions and mid-firm proteins like chicken. Save a full boil for potatoes, pasta, hard-boiled eggs and dried legumes, which need fast, even heat rather than a gentle touch.