Williamstown Forecast (beta)

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View the current warnings for South Australia

Forecast issued at 12:30 am ACST on Friday 15 May 2026.

Forecast for the rest of Friday

Forecast Icon
Rain
Min
14 °C
Max
21 °C
Precis
Possible rainfall:
4 to 15 mm
Chance of any rain:
95%

Mount Lofty Ranges area

Cloudy. Very high chance of rain, most likely from the late morning. Winds northeasterly 15 to 20 km/h turning northerly 15 to 25 km/h during the day. Overnight temperatures falling to between 13 and 16 with daytime temperatures reaching between 18 and 23.

Sun protection recommended from 11:10 am to 1:10 pm, UV Index predicted to reach 3 [Moderate]

Saturday 16 May

Forecast Icon
Storm
Min
12 °C
Max
19 °C
Precis
Possible rainfall:
5 to 20 mm
Chance of any rain:
95%

Mount Lofty Ranges area

Cloudy. Very high chance of rain, most likely in the morning and afternoon. The chance of a thunderstorm in the afternoon and evening. Winds northerly 15 to 25 km/h tending northwesterly 15 to 20 km/h in the middle of the day then becoming light in the early afternoon. Overnight temperatures falling to around 13 with daytime temperatures reaching between 18 and 21.

Sun protection recommended from 11:20 am to 1:00 pm, UV Index predicted to reach 3 [Moderate]

Sunday 17 May

Forecast Icon
Showers
Min
11 °C
Max
19 °C
Precis
Possible rainfall:
0 to 2 mm
Chance of any rain:
60%

Mount Lofty Ranges area

Partly cloudy. Medium chance of showers. The chance of morning fog. Light winds. Overnight temperatures falling to around 11 with daytime temperatures reaching between 17 and 20.

Sun protection recommended from 11:30 am to 12:50 pm, UV Index predicted to reach 3 [Moderate]

Monday 18 May

Forecast Icon
Showers
Min
9 °C
Max
17 °C
Precis
Possible rainfall:
0 to 1 mm
Chance of any rain:
50%

Mount Lofty Ranges area

Partly cloudy. The chance of morning fog. Medium chance of showers, most likely in the evening. Light winds becoming west to northwesterly 15 to 20 km/h during the afternoon. Overnight temperatures falling to between 8 and 11 with daytime temperatures reaching between 16 and 19.

Sun protection recommended from 11:30 am to 12:50 pm, UV Index predicted to reach 3 [Moderate]

Tuesday 19 May

Forecast Icon
Showers
Min
10 °C
Max
16 °C
Precis
Possible rainfall:
0 to 4 mm
Chance of any rain:
80%

Wednesday 20 May

Forecast Icon
Showers
Min
8 °C
Max
16 °C
Precis
Possible rainfall:
0 to 1 mm
Chance of any rain:
40%

Thursday 21 May

Forecast Icon
Cloudy
Min
8 °C
Max
17 °C
Precis
Possible rainfall:
0 mm
Chance of any rain:
20%

The next routine forecast will be issued at 4:10 am ACST Friday.

Product IDS11041