If your picture freezes or vanishes whenever the wind comes up over Hermanus, you are not imagining it. The south-easter that funnels across Walker Bay is one of the most consistent dish-killers we deal with on the whole Overberg coast — and one of the most preventable once a dish is mounted and aligned for these conditions.
A satellite dish has to point at a single satellite roughly 36,000 km away, accurate to within a fraction of a degree. Move it a few millimetres at the dish face and you have moved the aim by hundreds of kilometres up in orbit. That is why a setup that looks rock-solid can still lose signal: the margin for error is tiny.
What the wind actually does
The wind rarely tears a dish off a wall in one gust. What it does is steadier and more damaging — day after day it works fixings loose, lets the dish creep a degree or two off true, and slowly opens any join that was not properly sealed. You see it as a picture that is fine in calm weather but pixelates or drops the moment it blows, often with the E48-32 no-signal error on screen.
Because it comes and goes with the weather, many people assume it is a broadcast or subscription problem. On this coast it is almost always mechanical — a dish that has drifted, on a mount that was never rated for the bay.
Why a quick nudge never lasts
The temptation is to climb up, push the dish roughly back until the picture returns, and leave. It holds for a week, then the next blow puts you back to square one, because nothing was actually fixed. Proper satellite dish alignment is a different job:
- Re-aim to peak signal using a meter — not by eye, not just to where the picture happens to return.
- Marine-grade brackets and fixings rated for sustained coastal wind load.
- The mount anchored solidly, sited out of the worst gusts where possible.
- Every join re-sealed against the salt so vibration and moisture cannot creep back in.
- A final signal-strength reading recorded on site.
Wind and salt travel together
The same wind that drifts your dish carries salt that corrodes the bracket, bolts and the LNB at the end of the arm. A dish that is drifting and quietly corroding fails far faster than either problem alone, which is why we treat alignment and weather-sealing as one job — and why our approach to coastal installs starts with materials built to survive the bay.
How to tell it is the wind
- The picture is reliable in still weather and only fails when it is blowing.
- The fault crept in gradually over a season rather than overnight.
- Visible rust on the bracket, bolts or LNB, or the dish moves when pushed.
- It started after a big south-easter or a winter storm.
The bottom line
As trusted DStv installers in Hermanus, we specialise in exactly this kind of wind-related fault — our dish alignment service is built for the Walker Bay coast.
If your dish needs realigning every season, it was never mounted for Walker Bay. The fix is not more frequent call-outs — it is one job done properly: re-aligned, mounted for the wind and sealed against the salt. We cover Hermanus, Onrus, Sandbaai, Vermont and the rest of the Overberg coast, and most wind faults are a same-day sort-out. Book a technician and we will get your signal stable and keep it that way.