U/Th dating and oxygen isotope analysis of a stalagmite from Spannagel Cave in the Austrian Alps provides information about the timing and progression of the last interglacial climate. We determined two distinct growth intervals (warm climate) from ~130.7 thousand years (ka) before the present to 130.0 ka and from ~125.7 ka to 118.2 ka, the latter containing two periods of ceased stalagmite growth (colder climate) at around 123.8 ka and 120.5 ka. High resolution δ18O analysis of stalagmite SPA 50 reveals a clear regular cyclic pattern with periods of 197, 109, and 21 years, which are likely to be related to the Suess, Gleissberg, and Hale cycles respectively, indicating that Eemian climate in the Alps was forced by the Sun.