In the words of Bill Cody, "it all depends"! How much watershed? How much runoff during a rain. Porosity of the soils. Etc. How much rain did it take to get the water it currently has? It looks like about 1/20 full.

If you can, try planting some fast growin grasses in the pond basin and all other exposed areas to reduce the silt load and suspended clay.

Sure looks like you're well on your way to a real nice fishery! My guess is you'll be full by summer or real close.