2026-03-11 7 min read
Belmont sits in one of the more comfortable climates on the Peninsula. mild temperatures year-round, dry summers, and plenty of sunshine. But from November through February, the rain shows up in force. With roughly 27 inches of annual rainfall concentrated almost entirely in the cooler months, that's a meaningful amount of moisture hitting your home. and your garage door. every season.
Most homeowners in neighborhoods like Homeview and the Belmont Hills don't think much about their garage door until something breaks. But the wet season is exactly when minor problems quietly become expensive ones. A little seasonal attention goes a long way.
The Bay Area's rain pattern is distinct. You get long dry stretches followed by multi-day storm systems. That cycle of dry-then-soaked conditions is tough on garage door components in specific ways:
Metal hardware corrodes faster than you'd expect. Springs, cables, hinges, and track hardware are all exposed to moisture intrusion. When water gets in through a deteriorated bottom seal or gaps in the weatherstripping, it pools on the concrete floor and kicks up rust on anything metal sitting nearby. Over multiple rainy seasons, this is one of the leading causes of spring and cable failure in our area.
Wood panels and frames absorb moisture. Many of Belmont's homes. particularly the ranch-style houses in Homeview that date back to the late 1940s and 1950s. still have original or older wood-trimmed garage doors. Repeated wet winters cause wood to swell, warp, and eventually rot around the door frame. If your door is dragging or binding at the bottom corners, swollen wood trim is often the culprit.
Bottom seals crack and harden. The rubber seal along the bottom of your door takes the most abuse. Sun exposure during summer dries it out; rain and cold in winter cause it to crack. Once the seal fails, water runs straight under the door onto your garage floor. and into the door's lower panel.
Press your thumb into the bottom seal. If it's hard, cracked, or compressed flat, it needs replacing. A new seal costs $15,$40 in materials and takes about 30 minutes to install. This is one of the easiest DIY jobs on a garage door and one of the most impactful for keeping your garage dry through a Belmont winter.
Apply a silicone-based lubricant or white lithium grease to the springs, roller bearings, hinges, and the top of the drive rail. Do this at the start of the wet season and again in January. Avoid lubricating the tracks themselves. the rollers need to grip those. WD-40 is not a substitute here; it dries out quickly and doesn't provide lasting protection for garage door hardware.
If you're noticing unusual noises or sluggish movement, lubrication is the first step, but it's also worth checking whether your springs are showing early signs of wear.
The side and top seals are just as important as the bottom one. Walk inside your garage during the day with the door closed. If you can see any daylight around the edges, water can get through too. Replacement weatherstripping is sold by the foot at hardware stores and is straightforward to swap out.
Give your springs, cables, and hinges a visual check after the first major rain of the season. Light surface rust can be brushed off and the hardware re-lubricated. Dark, flaky rust that pits the metal surface is a different story. that's a sign the component is weakening. Springs under that kind of deterioration can snap without warning.
This is a good habit any time of year, but especially before storm season when you're relying on your door more. Place a 2x4 flat on the ground in the door's path and press the close button. The door should reverse immediately on contact. If it doesn't, the sensitivity needs adjustment. Our garage door safety tips guide walks through this in more detail.
The safety sensors sit low to the ground and get knocked out of alignment more often than people realize. especially if your garage floor sees water pooling near the door. Wipe the lenses with a soft cloth and make sure both sensors face each other squarely. A blinking indicator light on your opener is usually the first sign they're misaligned.
After any significant rain event, spend five minutes walking around your garage. Look for:
- Water on the garage floor near the door. indicates a failed seal - Rust streaks on the floor beneath the springs or cables - Stiff or slow operation. often caused by swollen wood or metal contraction - Visible daylight around the door frame edges
Homeowners in San Carlos, just north of Belmont, deal with the same wet-season conditions and the same types of issues. The pattern is consistent across the Peninsula: deferred maintenance in fall leads to emergency calls in January.
If your door needs a professional eye before or after the rainy season, reach out to our team for a service visit. Catching problems in October is almost always cheaper than fixing them mid-storm in December.
Q: How often should I lubricate my garage door in Belmont's climate? A: At minimum, twice a year. once before the rainy season (October) and once mid-winter (January). If your door is used heavily or sits in an exposed location, quarterly lubrication is better. Use a silicone spray or white lithium grease, not WD-40.
Q: Can I install a new bottom seal myself, or do I need a professional? A: Most standard bottom seals are a DIY-friendly repair. You'll need to slide or nail the new seal into the retainer along the door's bottom edge. If the retainer itself is bent or damaged, or if your door is a non-standard size, it's worth having a professional do it to make sure the seal sits flush and keeps water out properly.
Q: My garage floor is wet after rainstorms but the seal looks fine. What else could be causing it? A: A few possibilities. water may be seeping under the concrete slab rather than through the door, the side weatherstripping may have a gap, or the door itself may have a crack or hole in a lower panel. Check the perimeter carefully during or just after rain to pinpoint where the water is entering.