  The long-anticipated James Webb Space Telescope (JWST) will be able to
directly detect large samples of galaxies at very high redshift. Using the
well-established, computationally efficient Santa Cruz semi-analytic model,
with recently implemented multiphase gas partitioning and H2-based star
formation recipes, we make predictions for a wide variety of galaxy properties
for galaxy populations at $z$ = 4-10. In this work, we provide forecasts for
the physical properties of high-redshift galaxies and links to their
photometric properties. With physical parameters calibrated only to $z\sim0$
observations, our model predictions are in good agreement with current
observational constraints on stellar mass and star formation rate distribution
functions up to $z \sim 8$. We also provide predictions representing wide,
deep, and lensed JWST survey configurations. We study the redshift evolution of
key galaxy properties and the scaling relations among them. Taking advantage of
our models' high computational efficiency, we study the impact of
systematically varying the model parameters. All distribution functions and
scaling relations presented in this work are available at
https://www.simonsfoundation.org/semi-analytic-forecasts-for-jwst/.
