August is one of the cooler months of the year in Victor Harbor, with average highs near 14.4°C and lows around 9.1°C (mean 11.8°C). It is a relatively wet time of year, averaging 61 mm of rainfall and 77% relative humidity across the period.
August is one of the cooler months of the year in Victor Harbor. Across 45 years of records, the warmest August in Victor Harbor was 2024 — when the month averaged 13.8°C — while the coldest was 1989 at 10.3°C. Typical August days reach 14.4°C with nights near 9.1°C. The long-term trend is warming, about 0.2°C per decade.
August is a relatively wet time of year in Victor Harbor, averaging 61 mm of rainfall. The wettest August on record was 1984 with 111 mm, while the driest was 2014 at 14 mm.
Relative humidity in Victor Harbor during August averages 77%. The most humid August was 1987 at 80%, and the least humid was 2018 at 69%.
August receives about 3.2 kWh/m²/day of solar energy in Victor Harbor. The sunniest Augusts were 1995 and 2021 at 3.6 kWh/m²/day, and the cloudiest was 2010 at 2.9.
Average wind speed in Victor Harbor during August is 5.2 m/s. The windiest August was 1991 at 7.2 m/s, while the calmest was 2014 at 3.5 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 11.4°C | 11.5°C | 11.8°C | 11.8°C | 12.3°C | +0.9°C |
| Avg High | 13.9°C | 14.1°C | 14.5°C | 14.5°C | 15.0°C | +1.1°C |
| Avg Low | 8.8°C | 8.9°C | 9.0°C | 9.2°C | 9.6°C | +0.8°C |
| Avg Rain | 78 mm | 67 mm | 62 mm | 48 mm | 44 mm | -35 mm |
August temperatures in Victor Harbor have risen by about 0.9°C between 1981–1985 and 2021–2025.
August has ranged from a record low of 4.1°C (2003) to a record high of 23.6°C (2007).
Rainfall in August is a relatively wet time of year, averaging 61 mm, with a wettest year of 111 mm.
A quieter season to visit Victor Harbor
If your dates are flexible, the more temperate months of February and January tend to be the most comfortable for visiting Victor Harbor. That said, August — with days averaging 14.4°C and nights around 9.1°C (mean 11.8°C) and moderate rainfall (61 mm) — can still be rewarding for travellers who don't mind the cooler conditions, and often means fewer crowds.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 14.8°C | 11.9°C | 9.1°C | 19.2°C | 5.6°C | 38 mm | 76% | 5.2 m/s | 3.4 |
| 2024 🔥 | 16.8°C | 13.8°C | 10.7°C | 23.6°C | 6.5°C | 32 mm | 75% | 5.4 m/s | 3.3 |
| 2023 | 15.4°C | 12.5°C | 9.6°C | 21.9°C | 6.1°C | 25 mm | 77% | 4.2 m/s | 3.4 |
| 2022 | 14.4°C | 12.1°C | 9.9°C | 19.6°C | 7.2°C | 74 mm | 78% | 5.5 m/s | 3 |
| 2021 | 14.9°C | 12.1°C | 9.4°C | 19.9°C | 6.4°C | 32 mm | 78% | 4.9 m/s | 3.6 |
| 2020 | 13.6°C | 11.1°C | 8.6°C | 20.8°C | 4.9°C | 61 mm | 79% | 5 m/s | 3.2 |
| 2019 | 14.4°C | 11.6°C | 8.9°C | 18.3°C | 5.6°C | 35 mm | 72% | 5.2 m/s | 3.2 |
| 2018 | 15.2°C | 12.3°C | 9.5°C | 21.8°C | 6.7°C | 43 mm | 69% | 6.3 m/s | 3.2 |
| 2017 | 14.5°C | 12.0°C | 9.6°C | 19.7°C | 6.4°C | 40 mm | 73% | 5.7 m/s | 3.1 |
| 2016 | 15.0°C | 12.0°C | 9.0°C | 21.2°C | 6.5°C | 30 mm | 75% | 4.8 m/s | 3.2 |
| 2015 | 13.8°C | 11.2°C | 8.7°C | 20.1°C | 4.6°C | 29 mm | 79% | 4.8 m/s | 3.1 |
| 2014 | 14.6°C | 11.6°C | 8.6°C | 21.3°C | 5.6°C | 14 mm | 75% | 3.5 m/s | 3.5 |
| 2013 | 14.8°C | 12.5°C | 10.2°C | 20.7°C | 6.3°C | 82 mm | 80% | 6.2 m/s | 3.1 |
| 2012 | 13.6°C | 11.2°C | 8.9°C | 17.2°C | 6.5°C | 67 mm | 78% | 5.7 m/s | 3 |
| 2011 | 15.5°C | 12.9°C | 10.3°C | 20.8°C | 8.4°C | 52 mm | 79% | 4.3 m/s | 3.4 |
| 2010 | 13.2°C | 11.0°C | 8.7°C | 16.9°C | 5.6°C | 94 mm | 77% | 6.1 m/s | 2.9 |
| 2009 | 15.7°C | 13.0°C | 10.2°C | 21.5°C | 6.2°C | 50 mm | 78% | 5.8 m/s | 3.2 |
| 2008 | 12.9°C | 10.9°C | 8.8°C | 16.9°C | 6.8°C | 87 mm | 78% | 5.3 m/s | 3.2 |
| 2007 | 15.3°C | 12.4°C | 9.5°C | 23.6°C | 4.9°C | 29 mm | 76% | 5 m/s | 3.5 |
| 2006 | 15.6°C | 12.2°C | 8.9°C | 20.6°C | 5.8°C | 16 mm | 75% | 4 m/s | 3.4 |
| 2005 | 15.1°C | 12.2°C | 9.4°C | 21.1°C | 6.9°C | 74 mm | 76% | 5.4 m/s | 3.1 |
| 2004 | 14.4°C | 11.8°C | 9.1°C | 20.8°C | 5.1°C | 79 mm | 78% | 5.2 m/s | 3.2 |
| 2003 | 13.2°C | 10.6°C | 8.0°C | 16.9°C | 4.1°C | 87 mm | 77% | 6 m/s | 3 |
| 2002 | 14.3°C | 11.4°C | 8.4°C | 19.5°C | 4.5°C | 38 mm | 74% | 4.7 m/s | 3.5 |
| 2001 | 14.6°C | 12.0°C | 9.4°C | 18.4°C | 6.3°C | 83 mm | 75% | 5.9 m/s | 3 |
| 2000 | 13.8°C | 11.1°C | 8.5°C | 17.3°C | 6.1°C | 74 mm | 79% | 4.6 m/s | 3.2 |
| 1999 | 15.1°C | 12.0°C | 9.0°C | 20.8°C | 5.2°C | 34 mm | 76% | 4.3 m/s | 3.3 |
| 1998 | 14.9°C | 11.9°C | 8.9°C | 19.0°C | 6.4°C | 53 mm | 79% | 4.5 m/s | 3.3 |
| 1997 | 13.5°C | 11.1°C | 8.7°C | 18.0°C | 5.1°C | 79 mm | 75% | 5 m/s | 3 |
| 1996 | 13.4°C | 11.3°C | 9.3°C | 17.1°C | 6.9°C | 91 mm | 80% | 5.7 m/s | 3 |
| 1995 | 15.1°C | 11.9°C | 8.7°C | 20.7°C | 6.3°C | 29 mm | 77% | 4.9 m/s | 3.6 |
| 1994 | 13.4°C | 10.8°C | 8.3°C | 19.4°C | 5.7°C | 26 mm | 75% | 4.6 m/s | 3.5 |
| 1993 | 15.6°C | 12.6°C | 9.6°C | 21.1°C | 5.5°C | 63 mm | 74% | 5.3 m/s | 3.4 |
| 1992 | 13.4°C | 10.9°C | 8.4°C | 18.4°C | 4.8°C | 108 mm | 77% | 6.1 m/s | 3.1 |
| 1991 | 13.9°C | 11.4°C | 9.0°C | 17.9°C | 6.4°C | 89 mm | 76% | 7.2 m/s | 3.2 |
| 1990 | 12.8°C | 10.9°C | 9.0°C | 15.6°C | 4.6°C | 96 mm | 80% | 6.3 m/s | 3 |
| 1989 ❄️ | 12.4°C | 10.3°C | 8.1°C | 17.2°C | 4.3°C | 83 mm | 80% | 5.8 m/s | 3.4 |
| 1988 | 14.5°C | 12.0°C | 9.4°C | 19.5°C | 4.9°C | 52 mm | 76% | 5.1 m/s | 3.2 |
| 1987 | 13.5°C | 11.1°C | 8.6°C | 17.3°C | 5.8°C | 43 mm | 80% | 4.8 m/s | 3.2 |
| 1986 | 13.6°C | 11.1°C | 8.7°C | 18.3°C | 5.9°C | 95 mm | 79% | 5.3 m/s | 3.2 |
| 1985 | 13.7°C | 11.3°C | 8.8°C | 19.5°C | 5.3°C | 105 mm | 79% | 5.1 m/s | 3.2 |
| 1984 🌧️ | 13.5°C | 11.3°C | 9.1°C | 18.4°C | 6.8°C | 111 mm | 78% | 6.2 m/s | 3 |
| 1983 | 14.4°C | 11.5°C | 8.6°C | 19.5°C | 4.9°C | 83 mm | 80% | 4.6 m/s | — |
| 1982 | 16.4°C | 12.7°C | 8.9°C | 21.9°C | 5.1°C | 22 mm | 72% | 3.8 m/s | — |
| 1981 | 13.5°C | 11.2°C | 8.8°C | 16.3°C | 6.0°C | 110 mm | 78% | 6.5 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 14.4°C with lows near 9.1°C (mean 11.8°C), based on 45 years of NASA POWER data.
August averages 61 mm of rainfall in Victor Harbor, a relatively wet time of year. The wettest on record was 111 mm in 1984.
The hottest August reached 23.6°C in 2007. The coldest dipped to 4.1°C in 2003.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average August temperatures have risen by about 0.9°C. Daytime highs moved from 14.3°C to 15.3°C and overnight lows from 8.8°C to 9.7°C over the same span.
August is one of the cooler months of the year in Victor Harbor and a relatively wet time of year, so plan for around 14.4°C daytime highs and 9.1°C at night.
Not quite — August is the 2nd coolest month in Victor Harbor, averaging 11.8°C.
For August in Victor Harbor, pack light layers you can adjust through the day, with typical highs of 14.4°C and lows of 9.1°C. Bring an umbrella or light rain jacket too.
Relative humidity in August averages 77% — quite humid.
Average wind speed in August is 5.2 m/s. The windiest August on record averaged 7.2 m/s (1991).
The wettest August on record was 1984 with 111 mm. On average, August sees 61 mm.
All figures are derived from NASA POWER (Prediction Of Worldwide Energy Resources), based on MERRA-2 satellite reanalysis, covering 1981–2025.
Explore how the weather in Victor Harbor behaves each August, based on 45 years of NASA POWER climate data from 1981 to 2025. This page breaks down average temperatures, rainfall, humidity, wind and solar radiation for August specifically, along with year-by-year records and how the month has changed over the decades.
