Best Raincoats (Sep 2026)

Neither weight nor breed label decides it. Measure the back from collar to tail base, then the girth around the deepest part of the ribcage, and let girth break the tie. Belly coverage is the point of the garment: a coat that closes over the chest but leaves the underside bare fails on wet grass. Between two sizes, take the larger only if the leg openings still sit clear of the front stride.

Only if the harness sits under the shell or the shell is cut around it — harness compatibility is the second comparison axis here, so check where the leash opening lands before buying. A coat that swallows the harness forces you to choose between clipping the leash and keeping the back dry. Take the harness to the fitting: if the D-ring disappears, the coat is the wrong cut, not the wrong size.

Ease of donning decides whether the coat ever gets used, and it is the hardest of the three comparison axes to judge online. A shell you fight onto a shaking dog stays on the hook; the trade-off is that the fastest closures are usually the least adjustable. Look for one you can pull over the head and close with one hand, and check that leg straps clear the stride.

Wash it by hand or on a gentle cycle with a technical wash, never with fabric softener, which coats the fibers and kills beading. Dirt is what stops a shell shedding water; a rinse after muddy walks buys more than any spray. Re-proof when water stops beading on the shoulders, and hang to dry away from radiators — heat degrades the lamination faster than wear does.

The recurring cost splits between re-proofing and replacement. A shell that delaminates or splits a seam ends its life in one season regardless of price, so judge on seam construction and closure hardware, not a seasonal print. Re-proofing a still-sound coat costs little and buys another wet season — which is why a plain coat that fits often outlasts a patterned one that rubs.

Fit is the return reason that matters here, so read the exchange terms before the first rainy walk, not after. Many policies refuse a coat returned muddy, hair-covered or missing tags — ask before you buy rather than argue later. Where possible, test the fit indoors over the harness and keep the packaging until the dog has worn it once outdoors.