The Space SE question How much does it cost to land on a lunar mascon? includes the background information below. I am sure it's not too hard to find a link where spherical harmonic coefficients for some model of the Moon's gravity can be found, but the hard part is to turn them into an actual vector force field in units of m/s^2.
Likely the coefficients will be for the gravitational potential, and there will be some method to take the gradient to obtain a field, but I have never been able to make sense of this kind of data. For example see:
- Ceres gravity from spherical harmonics from Dawn, how to get the coefficients, definitions and potential?
- How can I verify my reconstructed gravity field of Ceres from spherical harmonics?
These maps of the moon show gravity anomalies measured by NASA's GRAIL mission. (Image credit: NASA/JPL-Caltech/CSM)
From Space.com's Mystery of Moon's Lumpy Gravity Explained, click for full size.
The Bouguer anomaly plots show elevated gravity as much as about 600 mGal. Wikipedia's Gal (unit) explains what this means; 0.6 Gal is 0.006 m/s^2 or almost a half of a percent of the Moon's average gravity, and they extend over quite large distances.
The gal (symbol: Gal), sometimes called galileo after Galileo Galilei, is a unit of acceleration used extensively in the science of gravimetry. The gal is defined as 1 centimeter per second squared (1 cm/s2). The milligal (mGal) and microgal (µGal) are respectively one thousandth and one millionth of a gal.