The system in six readings October is starting normally.
October is starting normally.
And the week ahead looks normal.
What just fell, what just left the tap, and what the sky is bringing next — read in pairs, as cause and effect.
01 Supply — What came in
01 Rainfall · October · 3 stations · as of 2026-10-05
Just shy of a
typical October.
0.7× normal so far
this October so far
typical first 5 days of October
Theewaterskloof 7mm · 1.0×
Voëlvlei 0mm · 0.0×
Wemmershoek 3mm · 0.4×
Verdict Just shy of a typical October through day 5.
02 Storage · 6 dams combined
The dams slipped —
0.8 points off.
75% was 76% last week
Verdict Comfortable, even with the slip.
02 Demand — What went out
03 Daily demand · vs target
The city is over
its daily target.
891Mℓ 31 Mℓ over target
Verdict 4% over the daily target — a week that erodes the buffer.
04 Per person · ℓ/day · 12-mo avg
8 litres less,
per Capetonian.
152ℓ/day −8 ℓ vs trailing avg
Trailing 12-month average
Verdict A small but real saving — sustained, this is what shaves a percentage point off summer drawdown.
03 Forecast — What's coming next
05 Forecast · 7 days · 6 catchments
About a typical
week of rain.
1.4× normal
vs the same 7 calendar days averaged across the past 10 years
Verdict Tue looks like the wettest day.
06 Where it lands · per catchment
Each dam, and
what's coming for it.
1.4× a typical week
total forecast across the six catchments vs the same 7 calendar days over the past 10 years, weighted by dam size
Theewaterskloof 75%
+9mm about normal
Voëlvlei 58%
+9mm 3.6× normal
Berg River 94%
+12mm 1.7× normal
Wemmershoek 87%
+13mm 2.0× normal
Steenbras Upper 96%
+19mm 2.2× normal
Steenbras Lower 49%
+17mm 1.7× normal
Verdict Steenbras Upper (96% full) and Steenbras Lower (49% full) get the biggest soaking.
