Honestly, there is nothing more annoying than walking out after a storm and finding your favorite wooden bench tilted like a shipwreck. The legs have disappeared into soft ground, the seat is covered in mud splatter, and you have to wrestle it back out. If that sounds familiar, the bench itself is probably fine. The real problem is what is underneath it.
The fastest and cheapest fix is to stop putting the bench directly on bare soil or grass. Bare ground turns into a sponge after rain, and a heavy bench with narrow legs acts like a cookie cutter. You need to spread the weight over a wider, firmer surface. I always start with the simplest option: slide a couple of flat patio stones or concrete pavers under the legs. Get ones that are at least 12 inches square. Dig them in just slightly so they sit level with the surrounding ground. This keeps the bench from looking like it is floating and gives the legs a dry, stable platform. If the bench has four legs, use four pavers. If it has a sled-style base, use two long ones.
For a more permanent solution in a soft or low-lying area, dig out a shallow base under the bench footprint. Go down about four to six inches, fill it with crushed gravel or road base, compact it with a hand tamper, and then set your pavers or the bench legs right on top of that. The gravel layer lets water drain through instead of pooling around the legs. This works really well for heavy wooden or metal benches that keep sinking no matter what you do.
Another trick I have used on clay soil is to place a plastic or rubber ground grid under the bench area. Those interlocking grid panels, often sold for shed bases or muddy parking spots, spread the load over a huge area. You can fill the cells with gravel or just let grass grow through them. Set the bench on top, and it will not move even after a week of rain. It is a bit more work, but it is a once-and-done fix.
If you do not want to dig or buy extra materials, try moving the bench to a slightly higher spot or a spot with better drainage. Even a few inches of elevation change can make a huge difference. You can also screw wide pressure-treated wood boards across the bottom of the legs to make DIY snowshoe feet. Two boards cut to about 18 inches long and screwed flat under each side create a much larger footprint. Just make sure to seal the cut ends so they do not rot.
Whatever you choose, do not just push the bench back into the mud and hope for the best. The repeated sinking and pulling will loosen the joints and crack the legs eventually. A stable base is a thirty-minute project that saves your bench and your back. Start with pavers today, and if they still sink after a heavy rain, add the gravel layer underneath next weekend. You will thank yourself every time the clouds open up.