Winter in the Western Cape means cold fronts, and cold fronts bring rain and wind together. If your DStv picture freezes or shows a no-signal message every time it rains, one of two things is going on: ordinary rain fade, or a dish and cable that are not in good shape. They need very different fixes, and you can often tell them apart yourself.

What rain fade is

Satellite signals are weakened as they pass through raindrops. DStv calls this rain fade and says it cannot control it. It can also come from weather far from your home, if a storm sits on the path the signal travels.

What DStv says is normal

According to DStv's help page, ordinary weather such as overcast skies, drizzle and normal rain should not interrupt your signal. If it does, DStv says your dish may be poorly installed or not properly fine-tuned, and recommends having it checked by an installer. Heavy downpours can still cause an interruption, which DStv says affects satellite TV everywhere.

So the useful question is not "does rain affect my signal?" but "is my signal failing in rain that it should cope with?"

A simple test

Next time the picture drops:

Note what the decoder shows. A message such as E48-32 points to a signal problem, not a payment problem.
Watch what happens when the rain eases. If the picture comes back by itself within a few minutes, that points to rain fade, especially if the downpour was heavy.
If the signal stays gone after the weather clears, or it drops in light rain, something physical is probably wrong: a dish that has moved, a damaged connector or a weakening LNB.

This is a rule of thumb, not a guarantee, but it points you in the right direction before you spend anything.

Why the Western Cape is more exposed

DStv's satellite sits low in our sky: from Cape Town it is only about 24° above the horizon, compared with about 36° in Johannesburg (we explain why in which way a DStv dish points in the Western Cape). A lower angle means the signal travels a longer path through the lower atmosphere, so all else being equal it has more rain to pass through. That makes a well-aligned dish and healthy cable matter more here than inland.

What else causes drops in the rain

A dish slightly out of alignment. It has less signal to spare, so a gust and a downpour together are enough to lose the picture.
Water in a connector or cable. A weathered connector can let moisture in, and the signal gets worse when everything is wet.
A weakening LNB. This is the arm in front of the dish. It can fail on and off before it fails completely.
Wind during the storm. It can move a dish by small amounts, which is all it takes.
Wet trees. Wet, heavy foliage in the path absorbs more signal than dry leaves.

What you can safely do

Stay off the roof. Tiny movements matter, and a fall is far worse than a missed match.
Check the cable at the decoder. It should be screwed on firmly, with no visible damage.
Restart the decoder. Unplug it for 30 seconds and plug it back in.
Look at the dish from the ground. If it looks tilted, bent or loose, take a photo.
Read the signal screen. If strength looks high but quality is zero, our guide to signal strength 100% but quality 0 explains what that means.
Keep a note of dates. A log of when it fails helps us find the cause quickly.

What we do about it

We measure signal strength and quality, align the dish with a meter, check the connectors and the LNB, replace anything worn with weather-resistant parts, and make sure the mounting is firm. DStv's help page recommends an 80 cm dish and says a larger dish may prevent some signal loss, so we can also tell you whether yours is suitable.

If this sounds like your house, we do signal fixing in Cape Town and Hermanus, and across the rest of the Western Cape. You may also find our guides on troubleshooting a no-signal error and the signs your dish needs realignment useful.

Losing your signal in ordinary rain? Contact Digitech DSTV or WhatsApp us and we will arrange a visit.

DStv Signal Drops When It Rains: Rain Fade or a Dish Problem?