The municipality lies at the hilly western edge of the Upper Rhine Plain in the Eastern Palatinate (Vorderpfalz).

Forst an der Weinstraße borders in the north on Wachenheim, in the northeast on Friedelsheim, in the southeast on Niederkirchen and in the south on Deidesheim.

The vast woodlands north of Deidesheim, also known as Vorst or Forst (cognate with English forest and meaning the same) was excluded from this arrangement and was reserved as the Prince-Bishop's hunting ground.

When the French Revolution spread to the German lands on the Rhine’s left bank, Forst, too, temporarily became part of France’s territory.

The municipality’s arms might in English heraldic language be described thus: Per fess argent on a ground vert seven trees in fess, the second, fourth and sixth taller than the others of the same, and per pale azure a cross of the first and vert on a mount gules and Agnus Dei tripping reguardant with a nimbus Or and bearing on a pole of the same a standard of the first charged with a cross of the fourth.

[5] The fecundity of the soils and the mild climate made the Romans choose to plant almonds, figs and citrus fruits here, but also especially to introduce winegrowing.

An early, small bypass road was built about 1970 right at the village's eastern outskirts; it has since been “assumed” by the municipality.