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Current weather in Williamstown (SA) is broken clouds.

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Weather data for Williamstown (SA) is updated regularly with the latest available observations and forecasts.

Now · 8:31 AM

Williamstown (SA) Weather & Hourly Forecast

Australia · South Australia

10°C

Mostly cloudy

Feels like: 9°C

💧 Humidity 94% 🌡 Pressure 1024 hPa 💨 Wind 6 km/h 👁 Visibility 19.8 km ☁ Clouds 83% ☀️ UV index 1.2 · Low 🌅 Sunrise — 🌇 Sunset —

Hourly Forecast for Williamstown (SA)

Today

9:30 AM

Overcast

12° 💧 0.2 mm 💨 7 km/h H 83%1025 hPa

12:30 PM

Overcast

14° 💧 0.2 mm 💨 6 km/h H 70%1024 hPa

3:30 PM

Light rain

14° 💧 0.1 mm 💨 11 km/h H 75%1024 hPa

6:30 PM

Mostly clear night

10° 💧 None 💨 8 km/h H 91%1026 hPa

9:30 PM

Clear night

8° 💧 None 💨 9 km/h H 97%1027 hPa

Tomorrow

12:30 AM

Mist at night

8° 💧 None 💨 12 km/h H 98%1028 hPa

3:30 AM

Mostly cloudy night

9° 💧 0.0 mm 💨 15 km/h H 94%1027 hPa

6:30 AM

Sunny

7° 💧 None 💨 10 km/h H 96%1030 hPa

9:30 AM

Partly cloudy

12° 💧 None 💨 15 km/h H 68%1031 hPa

12:30 PM

Mostly cloudy

14° 💧 None 💨 13 km/h H 64%1030 hPa

3:30 PM

Sunny

13° 💧 None 💨 15 km/h H 60%1029 hPa

6:30 PM

Mostly clear night

9° 💧 None 💨 14 km/h H 80%1029 hPa

9:30 PM

Clear night

8° 💧 None 💨 13 km/h H 85%1030 hPa

Tuesday

12:30 AM

Partly cloudy night

6° 💧 None 💨 12 km/h H 87%1030 hPa

3:30 AM

Clear night

5° 💧 None 💨 11 km/h H 89%1028 hPa

6:30 AM

Mostly cloudy

5° 💧 None 💨 11 km/h H 89%1029 hPa

Today

9:30 AM

Overcast

12° 💧 0.0 mm 💨 7 km/h H 83%1025 hPa

10:30 AM

Light rain

13° 💧 0.1 mm 💨 6 km/h H 74%1025 hPa

11:30 AM

Overcast

13° 💧 0.0 mm 💨 6 km/h H 73%1024 hPa

12:30 PM

Overcast

14° 💧 0.1 mm 💨 6 km/h H 70%1024 hPa

1:30 PM

Light rain

14° 💧 0.1 mm 💨 8 km/h H 71%1024 hPa

2:30 PM

Overcast

14° 💧 0.1 mm 💨 9 km/h H 74%1023 hPa

3:30 PM

Light rain

14° 💧 0.1 mm 💨 11 km/h H 75%1024 hPa

4:30 PM

Mostly cloudy

13° 💧 0.0 mm 💨 11 km/h H 76%1024 hPa

5:30 PM

Sunny

12° 💧 None 💨 9 km/h H 80%1025 hPa

6:30 PM

Mostly clear night

10° 💧 None 💨 8 km/h H 91%1026 hPa

7:30 PM

Clear night

9° 💧 None 💨 9 km/h H 94%1026 hPa

8:30 PM

Clear night

8° 💧 None 💨 9 km/h H 96%1026 hPa

9:30 PM

Clear night

8° 💧 None 💨 9 km/h H 97%1027 hPa

10:30 PM

Clear night

8° 💧 None 💨 9 km/h H 97%1027 hPa

11:30 PM

Clear night

8° 💧 None 💨 11 km/h H 96%1027 hPa

Tomorrow

12:30 AM

Mist at night

8° 💧 None 💨 12 km/h H 98%1028 hPa

1:30 AM

Mist at night

9° 💧 None 💨 12 km/h H 98%1028 hPa

2:30 AM

Mist at night

9° 💧 None 💨 12 km/h H 97%1028 hPa

3:30 AM

Mostly cloudy night

9° 💧 0.0 mm 💨 15 km/h H 94%1027 hPa

4:30 AM

Clear night

8° 💧 None 💨 13 km/h H 95%1028 hPa

5:30 AM

Clear night

7° 💧 None 💨 11 km/h H 96%1029 hPa

6:30 AM

Sunny

7° 💧 None 💨 10 km/h H 96%1030 hPa

7:30 AM

Sunny

8° 💧 None 💨 10 km/h H 91%1030 hPa

8:30 AM

Mostly sunny

11° 💧 None 💨 12 km/h H 77%1031 hPa

9:30 AM

Partly cloudy

12° 💧 None 💨 15 km/h H 68%1031 hPa

10:30 AM

Mostly cloudy

14° 💧 None 💨 14 km/h H 60%1030 hPa

11:30 AM

Overcast

14° 💧 None 💨 14 km/h H 62%1030 hPa

12:30 PM

Mostly cloudy

14° 💧 None 💨 13 km/h H 64%1030 hPa

1:30 PM

Mostly sunny

14° 💧 None 💨 13 km/h H 63%1029 hPa

2:30 PM

Mostly sunny

14° 💧 None 💨 14 km/h H 59%1029 hPa

3:30 PM

Sunny

13° 💧 None 💨 15 km/h H 60%1029 hPa

4:30 PM

Sunny

12° 💧 None 💨 15 km/h H 64%1029 hPa

5:30 PM

Sunny

10° 💧 None 💨 14 km/h H 73%1029 hPa

6:30 PM

Mostly clear night

9° 💧 None 💨 14 km/h H 80%1029 hPa

7:30 PM

Mostly cloudy night

8° 💧 None 💨 16 km/h H 83%1030 hPa

8:30 PM

Partly cloudy night

8° 💧 None 💨 17 km/h H 85%1030 hPa

9:30 PM

Clear night

8° 💧 None 💨 13 km/h H 85%1030 hPa

10:30 PM

Clear night

7° 💧 None 💨 10 km/h H 88%1030 hPa

11:30 PM

Partly cloudy night

6° 💧 None 💨 11 km/h H 89%1030 hPa

Tuesday

12:30 AM

Partly cloudy night

6° 💧 None 💨 12 km/h H 87%1030 hPa

1:30 AM

Mostly clear night

6° 💧 None 💨 14 km/h H 85%1029 hPa

2:30 AM

Clear night

6° 💧 None 💨 14 km/h H 86%1029 hPa

3:30 AM

Clear night

5° 💧 None 💨 11 km/h H 89%1028 hPa

4:30 AM

Clear night

5° 💧 None 💨 11 km/h H 90%1028 hPa

5:30 AM

Mostly clear night

5° 💧 None 💨 12 km/h H 89%1028 hPa

6:30 AM

Mostly cloudy

5° 💧 None 💨 11 km/h H 89%1029 hPa

7:30 AM

Mostly sunny

7° 💧 None 💨 11 km/h H 84%1029 hPa

8:30 AM

Sunny

9° 💧 None 💨 8 km/h H 74%1030 hPa

9:30 AM

Mostly sunny

11° 💧 None 💨 7 km/h H 67%1029 hPa

10:30 AM

Sunny

13° 💧 None 💨 3 km/h H 61%1029 hPa

11:30 AM

Mostly cloudy

14° 💧 None 💨 3 km/h H 58%1029 hPa

12:30 PM

Partly cloudy

15° 💧 None 💨 6 km/h H 57%1028 hPa

1:30 PM

Mostly sunny

15° 💧 None 💨 8 km/h H 59%1027 hPa

2:30 PM

Mostly cloudy

15° 💧 None 💨 9 km/h H 60%1027 hPa

3:30 PM

Mostly cloudy

15° 💧 None 💨 10 km/h H 61%1027 hPa

4:30 PM

Partly cloudy

14° 💧 None 💨 10 km/h H 64%1027 hPa

5:30 PM

Overcast

12° 💧 None 💨 12 km/h H 74%1028 hPa

6:30 PM

Overcast night

9° 💧 None 💨 16 km/h H 78%1029 hPa

7:30 PM

Overcast night

9° 💧 None 💨 17 km/h H 83%1030 hPa

8:30 PM

Overcast night

9° 💧 None 💨 18 km/h H 80%1031 hPa

9:30 PM

Mostly cloudy night

9° 💧 None 💨 19 km/h H 78%1031 hPa

Wednesday

12:30 AM

Overcast night

7° 💧 None 💨 20 km/h H 90%1031 hPa

3:30 AM

Mostly cloudy night

7° 💧 None 💨 19 km/h H 84%1031 hPa

6:30 AM

Mostly sunny

6° 💧 None 💨 26 km/h H 92%1035 hPa

9:30 AM

Sunny

8° 💧 None 💨 30 km/h H 64%1036 hPa

12:30 PM

Partly cloudy

11° 💧 None 💨 26 km/h H 55%1036 hPa

3:30 PM

Partly cloudy

10° 💧 None 💨 25 km/h H 60%1035 hPa

6:30 PM

Mostly clear night

8° 💧 None 💨 19 km/h H 71%1036 hPa

9:30 PM

Mostly clear night

6° 💧 None 💨 22 km/h H 77%1038 hPa

Thursday

12:30 AM

Clear night

5° 💧 None 💨 22 km/h H 86%1038 hPa

3:30 AM

Clear night

4° 💧 None 💨 23 km/h H 90%1038 hPa

6:30 AM

Sunny

3° 💧 None 💨 22 km/h H 90%1038 hPa

9:30 AM

Sunny

8° 💧 None 💨 25 km/h H 72%1039 hPa

12:30 PM

Sunny

12° 💧 None 💨 17 km/h H 61%1037 hPa

3:30 PM

Sunny

13° 💧 None 💨 16 km/h H 58%1035 hPa

6:30 PM

Clear night

9° 💧 None 💨 17 km/h H 76%1035 hPa

9:30 PM

Clear night

8° 💧 None 💨 16 km/h H 93%1035 hPa

Friday

12:30 AM

Clear night

7° 💧 None 💨 13 km/h H 95%1034 hPa

3:30 AM

Clear night

7° 💧 None 💨 15 km/h H 89%1033 hPa

6:30 AM

Sunny

7° 💧 None 💨 15 km/h H 92%1033 hPa

9:30 AM

Sunny

12° 💧 None 💨 11 km/h H 74%1033 hPa

12:30 PM

Sunny

16° 💧 None 💨 9 km/h H 53%1030 hPa

3:30 PM

Sunny

17° 💧 None 💨 8 km/h H 49%1027 hPa

6:30 PM

Clear night

11° 💧 None 💨 9 km/h H 68%1027 hPa

9:30 PM

Clear night

10° 💧 None 💨 11 km/h H 63%1028 hPa

Saturday

3:30 AM

Clear night

10° 💧 None 💨 14 km/h H 71%1025 hPa

9:30 AM

Sunny

16° 💧 None 💨 15 km/h H 52%1024 hPa

3:30 PM

Mostly cloudy

20° 💧 None 💨 12 km/h H 43%1019 hPa

9:30 PM

Overcast night

14° 💧 None 💨 11 km/h H 58%1019 hPa

Sunday

3:30 AM

Partly cloudy night

15° 💧 None 💨 21 km/h H 59%1015 hPa

9:30 AM

Mostly sunny

18° 💧 None 💨 25 km/h H 62%1015 hPa

3:30 PM

Mostly sunny

16° 💧 None 💨 23 km/h H 69%1015 hPa

9:30 PM

Clear night

10° 💧 None 💨 16 km/h H 98%1019 hPa

Monday

3:30 AM

Overcast night

10° 💧 None 💨 11 km/h H 97%1017 hPa

9:30 AM

Overcast

11° 💧 None 💨 14 km/h H 89%1019 hPa

3:30 PM

Overcast

13° 💧 None 💨 22 km/h H 70%1017 hPa

9:30 PM

Overcast night

10° 💧 None 💨 21 km/h H 97%1022 hPa

Tuesday

3:30 AM

Mostly clear night

6° 💧 None 💨 13 km/h H 94%1024 hPa

9:30 AM

Mostly cloudy

10° 💧 None 💨 15 km/h H 65%1029 hPa

3:30 PM

Partly cloudy

11° 💧 None 💨 13 km/h H 60%1028 hPa

9:30 PM

Mostly clear night

6° 💧 None 💨 10 km/h H 89%1031 hPa

Wednesday

3:30 AM

Mostly clear night

5° 💧 None 💨 6 km/h H 87%1030 hPa

9:30 AM

Sunny

10° 💧 None 💨 11 km/h H 69%1032 hPa

3:30 PM

Mostly sunny

14° 💧 None 💨 5 km/h H 61%1028 hPa

9:30 PM

Clear night

8° 💧 None 💨 11 km/h H 73%1028 hPa

Thursday

3:30 AM

Clear night

8° 💧 None 💨 17 km/h H 75%1024 hPa

9:30 AM

Sunny

15° 💧 None 💨 19 km/h H 54%1022 hPa

3:30 PM

Sunny

20° 💧 None 💨 17 km/h H 36%1015 hPa

9:30 PM

Mostly clear night

17° 💧 None 💨 21 km/h H 28%1014 hPa

Friday

3:30 AM

Partly cloudy night

17° 💧 None 💨 28 km/h H 32%1009 hPa

9:30 AM

Light rain

14° 💧 None 💨 34 km/h H 58%1012 hPa

3:30 PM

Mostly sunny

15° 💧 None 💨 39 km/h H 68%1015 hPa

9:30 PM

Clear night

10° 💧 None 💨 20 km/h H 84%1022 hPa

Saturday

3:30 AM

Mostly clear night

8° 💧 None 💨 15 km/h H 92%1024 hPa

9:30 AM

Mostly cloudy

13° 💧 None 💨 13 km/h H 61%1028 hPa

3:30 PM

Mostly sunny

15° 💧 None 💨 4 km/h H 55%1026 hPa

9:30 PM

Clear night

8° 💧 None 💨 14 km/h H 84%1030 hPa

Sunday

3:30 AM

Clear night

8° 💧 None 💨 13 km/h H 90%1027 hPa

9:30 AM

Sunny

13° 💧 None 💨 19 km/h H 70%1027 hPa

3:30 PM

Mostly cloudy

20° 💧 None 💨 12 km/h H 48%1021 hPa

9:30 PM

Overcast night

15° 💧 None 💨 14 km/h H 56%1019 hPa

In Williamstown (SA) and, more broadly, across South Australia: This morning will start with a mix of sun and clouds, creating a pleasant and mild atmosphere. Temperatures are expected to range from 11 degrees Celsius in the early hours to around 18 degrees Celsius later in the day. Light southwest winds will gently blow at up to 11 km/h, with occasional gusts reaching the same speed. Throughout the afternoon, the weather will remain relatively stable, with no rain expected. The sky may continue to display a mix of sun and clouds, providing comfortable conditions for outdoor activities. Overall, it looks to be a mild and calm day with gentle breezes and no significant weather disturbances.

15-Day Weather Outlook for Williamstown (SA)

Sunday, Sep 6Sun Sep 6

Overcast 14°/7° 💧 None 💨 15 km/h

TomorrowTomorrow

Partly cloudy 14°/5° 💧 None 💨 17 km/h

Tuesday, Sep 8Tue Sep 8

Mostly sunny 15°/6° 💧 0.7 mm 💨 26 km/h

Wednesday, Sep 9Wed Sep 9

Partly cloudy 11°/3° 💧 None 💨 30 km/h

Thursday, Sep 10Thu Sep 10

Sunny 13°/7° 💧 None 💨 25 km/h

Friday, Sep 11Fri Sep 11

Sunny 17°/10° 💧 None 💨 14 km/h

Saturday, Sep 12Sat Sep 12

Mostly cloudy 20°/14° 💧 None 💨 21 km/h

Sunday, Sep 13Sun Sep 13

Overcast 18°/10° 💧 0.3 mm 💨 25 km/h

Monday, Sep 14Mon Sep 14

Overcast 13°/6° 💧 2.1 mm 💨 22 km/h

Tuesday, Sep 15Tue Sep 15

Mostly cloudy 11°/5° 💧 0.0 mm 💨 15 km/h

Wednesday, Sep 16Wed Sep 16

Mostly sunny 14°/8° 💧 None 💨 17 km/h

Thursday, Sep 17Thu Sep 17

Mostly sunny 20°/15° 💧 0.0 mm 💨 28 km/h

Friday, Sep 18Fri Sep 18

Light rain 15°/8° 💧 1.8 mm 💨 39 km/h

Saturday, Sep 19Sat Sep 19

Mostly cloudy 15°/8° 💧 None 💨 14 km/h

Sunday, Sep 20Sun Sep 20

Mostly cloudy 20°/13° 💧 None 💨 19 km/h

TEMPERATURE OUTLOOK

Temperature & Weather Trends in Williamstown (SA)

Vertical axis: °C · Color based on temperature

AIR QUALITY FORECAST

Air Quality Forecast for Williamstown (SA)

Hourly forecast · Updated every 2 hours

Good

Nearest forecast value 9:30 AM

PM2.5 Fine particles Good 1,2µg/m³

Microscopic particles that can penetrate deep into the lungs. Elevated concentrations can especially affect children, older adults and people with respiratory conditions.

PM10 Particulate matter Good 3,4µg/m³

Includes dust, pollen and other airborne particles. High concentrations may irritate the respiratory system.

O₃ Ozone Good 58,9µg/m³

Ground-level ozone can irritate the eyes and respiratory system when concentrations are elevated.

NO₂ Nitrogen dioxide Good 0,3µg/m³

A gas emitted mainly by traffic and some industrial activity. High exposure can affect respiratory health.

Air quality is favorable for outdoor activities.

UV & HEALTH

UV, Sun & Health Outlook in Williamstown (SA)

Maximum daily UV Today, tomorrow and the following day show the maximum UV index forecast for each day.

0–2 Low 3–5 Moderate 6–7 High 8–10 Very high 11+ Extreme

Today UV 5,3Moderate 😊Good

Tomorrow UV 5,8Moderate 🙂Fair

Tuesday UV 6,4High 🙂Fair

Wednesday UV 6,6High 🙂Fair

Thursday UV 6,7High 🙂Fair

Friday UV 6,0High —Unavailable

Saturday UV 6,0High —Unavailable

Hourly UV index today

10:00 AMUV 3,8 11:00 AMUV 4,4 12:00 PMUV 5,3 1:00 PMUV 4,7 2:00 PMUV 3,6 3:00 PMUV 1,8 4:00 PMUV 0,7 5:00 PMUV 0,1 6:00 PMUV 0,0 7:00 PMUV 0,0

Today's weather health advice Open today's recommendations.

Moderate UV risk

Sunglasses and sun protection are recommended for prolonged exposure.

Good air quality

Air quality is good and outdoor activities can be enjoyed normally.

Comfortable temperature conditions

Temperatures should feel comfortable for most people, with no particular heat or cold precautions needed.

Good conditions for outdoor activities

Outdoor activities can generally be enjoyed normally, with sun protection adjusted to the UV level.

WIND OUTLOOK

Hourly Wind Forecast for Williamstown (SA)

Vertical axis: km/h · Horizontal axis: hours

Sustained wind Max gusts

NIGHT SKY · WILLIAMSTOWN (SA), SOUTH AUSTRALIA

Tonight's Stargazing & Shooting Stars

Excellent observing conditions. Best local viewing window: 4:30 AM–5:30 AM.

93/100Best-hour score

BEST TIME TONIGHT 4:30 AM–5:30 AM Astronomical darkness: 7:22 PM–5:01 AM

☁ Cloud cover 2% Real hourly forecast for the best viewing hour.

☾ Moonlight 26% Waning Crescent · Moon about 7° above the horizon at the best viewing hour.

☄ Meteor activity September ε-Perseids Reference ZHR 8 · Radiant 15° high at the best hour.

✦ Estimated visible meteors 0–1/hour Local estimate after weather, moonlight and radiant-height adjustments.

Chance ≥1 meteor in 30 min30%

UPCOMING METEOR PERIODSStart, peak and end dates · weather should be checked closer to the peak.

SEP 5–SEP 21

September ε-PerseidsStart SEP 5 · Peak SEP 9 · End SEP 21 · ZHR 8 · 6% Moon at peak

ACTIVE NOW

SEP 20–NOV 20

Southern TauridsStart SEP 20 · Peak NOV 5 · End NOV 20 · ZHR 7 · 20% Moon at peak

UPCOMING

OCT 2–NOV 7

OrionidsStart OCT 2 · Peak OCT 21 · End NOV 7 · ZHR 20 · 77% Moon at peak

UPCOMING

OCT 20–DEC 10

Northern TauridsStart OCT 20 · Peak NOV 12 · End DEC 10 · ZHR 5 · 7% Moon at peak

UPCOMING

Experimental local observing estimate. Weather values come from the hourly forecast already used on this page. Moon position and astronomical darkness are calculated locally from time and coordinates. Meteor-shower ZHR describes ideal conditions and is not the number of meteors a person should expect to see locally.

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Forecast data for Williamstown (SA) were last refreshed today at 8:30 AM. The current forecast period extends through 08/09/2026 at 6:30 AM. Weather, air-quality and UV-index data are provided through WEATHER-INFO.COM. Forecasts are produced automatically from the latest available data and are subject to periodic technical checks. This service is intended for general weather information.