August is one of the cooler months of the year in Tumby Bay, with average highs near 15°C and lows around 11.5°C (mean 13.3°C). It is a relatively wet time of year, averaging 52 mm of rainfall and 75% relative humidity across the period.
August is one of the cooler months of the year in Tumby Bay. Across 45 years of records, the warmest August in Tumby Bay was 2024 — when the month averaged 14.8°C — while the coldest was 1989 at 11.8°C. Typical August days reach 15°C with nights near 11.5°C. The long-term trend is warming, about 0.2°C per decade.
August is a relatively wet time of year in Tumby Bay, averaging 52 mm of rainfall. The wettest August on record was 1992 with 130 mm, while the driest was 2014 at 9 mm.
Relative humidity in Tumby Bay during August averages 75%. The most humid August was 2013 at 79%, and the least humid was 2019 at 71%.
August receives about 3.5 kWh/m²/day of solar energy in Tumby Bay. The sunniest August was 1995 at 3.9 kWh/m²/day, and the cloudiest were 2003 and 2010 at 3.1.
Average wind speed in Tumby Bay during August is 5.7 m/s. The windiest August was 1991 at 7.2 m/s, while the calmest was 2014 at 4.1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 12.9°C | 13.1°C | 13.3°C | 13.3°C | 13.7°C | +0.8°C |
| Avg High | 14.6°C | 14.8°C | 15.2°C | 15.0°C | 15.6°C | +1°C |
| Avg Low | 11.1°C | 11.3°C | 11.5°C | 11.6°C | 11.9°C | +0.8°C |
| Avg Rain | 67 mm | 64 mm | 54 mm | 38 mm | 27 mm | -40 mm |
August temperatures in Tumby Bay have risen by about 0.8°C between 1981–1985 and 2021–2025.
August has ranged from a record low of 8°C (2003) to a record high of 24°C (2007).
Rainfall in August is a relatively wet time of year, averaging 52 mm, with a wettest year of 130 mm.
A quieter season to visit Tumby Bay
If your dates are flexible, the more temperate months of February and January tend to be the most comfortable for visiting Tumby Bay. That said, August — with days averaging 15°C and nights around 11.5°C (mean 13.3°C) and moderate rainfall (52 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 | 15.3°C | 13.5°C | 11.8°C | 18.9°C | 9.3°C | 22 mm | 73% | 5.9 m/s | 3.6 |
| 2024 🔥 | 17.0°C | 14.8°C | 12.6°C | 22.8°C | 10.6°C | 12 mm | 75% | 5.6 m/s | 3.7 |
| 2023 | 16.1°C | 14.2°C | 12.4°C | 21.0°C | 11.0°C | 10 mm | 74% | 4.6 m/s | 3.4 |
| 2022 | 15.0°C | 13.2°C | 11.5°C | 19.4°C | 10.1°C | 67 mm | 76% | 6.1 m/s | 3.2 |
| 2021 | 15.5°C | 13.5°C | 11.5°C | 19.7°C | 9.8°C | 16 mm | 75% | 5.1 m/s | 3.7 |
| 2020 | 14.5°C | 13.0°C | 11.5°C | 20.6°C | 10.0°C | 38 mm | 75% | 5.9 m/s | 3.5 |
| 2019 | 14.8°C | 13.0°C | 11.2°C | 19.7°C | 9.3°C | 24 mm | 71% | 5.5 m/s | 3.3 |
| 2018 | 15.5°C | 13.6°C | 11.7°C | 20.7°C | 9.1°C | 37 mm | 72% | 6.4 m/s | 3.3 |
| 2017 | 14.9°C | 13.4°C | 11.8°C | 20.4°C | 10.1°C | 28 mm | 72% | 6 m/s | 3.2 |
| 2016 | 15.6°C | 13.5°C | 11.4°C | 21.1°C | 9.4°C | 14 mm | 73% | 5.2 m/s | 3.6 |
| 2015 | 14.4°C | 12.9°C | 11.4°C | 19.3°C | 8.8°C | 33 mm | 77% | 5.1 m/s | 3.2 |
| 2014 | 14.5°C | 13.0°C | 11.5°C | 19.4°C | 9.2°C | 9 mm | 74% | 4.1 m/s | 3.7 |
| 2013 | 15.8°C | 13.9°C | 12.1°C | 20.1°C | 9.9°C | 59 mm | 79% | 6.3 m/s | 3.4 |
| 2012 | 14.6°C | 12.9°C | 11.3°C | 18.1°C | 9.4°C | 44 mm | 75% | 5.8 m/s | 3.3 |
| 2011 | 15.9°C | 14.1°C | 12.3°C | 19.9°C | 11.2°C | 52 mm | 77% | 4.8 m/s | 3.6 |
| 2010 | 14.1°C | 12.7°C | 11.3°C | 17.2°C | 9.2°C | 77 mm | 75% | 6.2 m/s | 3.1 |
| 2009 | 16.2°C | 14.2°C | 12.2°C | 20.1°C | 10.4°C | 39 mm | 77% | 5.9 m/s | 3.6 |
| 2008 | 13.6°C | 12.3°C | 11.0°C | 16.9°C | 9.4°C | 71 mm | 75% | 5.9 m/s | 3.4 |
| 2007 | 16.0°C | 13.9°C | 11.9°C | 24.0°C | 10.3°C | 16 mm | 74% | 5.4 m/s | 3.7 |
| 2006 | 15.9°C | 13.9°C | 11.8°C | 20.3°C | 10.1°C | 16 mm | 75% | 4.4 m/s | 3.7 |
| 2005 | 15.5°C | 13.6°C | 11.7°C | 20.8°C | 10.0°C | 74 mm | 75% | 6.1 m/s | 3.3 |
| 2004 | 15.1°C | 13.1°C | 11.2°C | 20.0°C | 9.7°C | 86 mm | 77% | 5.7 m/s | 3.6 |
| 2003 | 14.2°C | 12.4°C | 10.7°C | 18.0°C | 8.0°C | 80 mm | 75% | 6.5 m/s | 3.1 |
| 2002 | 14.8°C | 13.1°C | 11.4°C | 20.4°C | 9.7°C | 42 mm | 71% | 5.4 m/s | 3.7 |
| 2001 | 15.6°C | 13.8°C | 11.9°C | 20.7°C | 10.6°C | 56 mm | 73% | 6.3 m/s | 3.4 |
| 2000 | 14.6°C | 13.0°C | 11.3°C | 17.7°C | 9.6°C | 63 mm | 77% | 5.4 m/s | 3.6 |
| 1999 | 15.4°C | 13.6°C | 11.8°C | 19.8°C | 10.4°C | 33 mm | 72% | 5.2 m/s | 3.6 |
| 1998 | 15.2°C | 13.5°C | 11.8°C | 21.0°C | 10.1°C | 51 mm | 79% | 5.1 m/s | 3.5 |
| 1997 | 14.4°C | 12.8°C | 11.2°C | 18.9°C | 9.6°C | 65 mm | 73% | 5.4 m/s | 3.3 |
| 1996 | 14.2°C | 12.6°C | 11.1°C | 17.3°C | 9.2°C | 89 mm | 78% | 5.7 m/s | 3.4 |
| 1995 | 15.5°C | 13.3°C | 11.1°C | 20.3°C | 8.4°C | 28 mm | 76% | 5.2 m/s | 3.9 |
| 1994 | 14.4°C | 12.7°C | 11.0°C | 19.7°C | 9.4°C | 21 mm | 72% | 5 m/s | 3.8 |
| 1993 | 16.0°C | 13.9°C | 11.7°C | 21.1°C | 8.8°C | 62 mm | 74% | 5.4 m/s | 3.6 |
| 1992 🌧️ | 14.3°C | 12.6°C | 11.0°C | 17.5°C | 8.7°C | 130 mm | 75% | 6.7 m/s | 3.3 |
| 1991 | 14.8°C | 13.1°C | 11.3°C | 18.5°C | 9.5°C | 78 mm | 74% | 7.2 m/s | 3.5 |
| 1990 | 13.9°C | 12.5°C | 11.2°C | 17.4°C | 10.0°C | 83 mm | 77% | 6.8 m/s | 3.2 |
| 1989 ❄️ | 13.3°C | 11.8°C | 10.4°C | 17.3°C | 8.6°C | 66 mm | 77% | 6.3 m/s | 3.6 |
| 1988 | 14.9°C | 13.2°C | 11.4°C | 19.1°C | 9.8°C | 43 mm | 73% | 5.6 m/s | 3.4 |
| 1987 | 14.2°C | 12.6°C | 11.1°C | 18.8°C | 8.7°C | 37 mm | 77% | 5.1 m/s | 3.4 |
| 1986 | 14.7°C | 13.0°C | 11.3°C | 20.1°C | 9.0°C | 81 mm | 76% | 5.8 m/s | 3.5 |
| 1985 | 14.7°C | 12.9°C | 11.1°C | 20.1°C | 8.6°C | 113 mm | 77% | 6.1 m/s | 3.5 |
| 1984 | 14.2°C | 12.5°C | 10.9°C | 17.5°C | 9.6°C | 112 mm | 77% | 6.8 m/s | 3.4 |
| 1983 | 15.0°C | 13.0°C | 11.0°C | 19.4°C | 8.5°C | 51 mm | 78% | 5 m/s | — |
| 1982 | 16.2°C | 13.9°C | 11.6°C | 20.7°C | 9.0°C | 21 mm | 74% | 4.2 m/s | — |
| 1981 | 14.6°C | 12.9°C | 11.3°C | 18.0°C | 9.3°C | 81 mm | 77% | 6.8 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 15°C with lows near 11.5°C (mean 13.3°C), based on 45 years of NASA POWER data.
August averages 52 mm of rainfall in Tumby Bay, a relatively wet time of year. The wettest on record was 130 mm in 1992.
The hottest August reached 24°C in 2007. The coldest dipped to 8°C in 2003.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average August temperatures have risen by about 0.8°C. Daytime highs moved from 14.9°C to 15.8°C and overnight lows from 11.2°C to 12°C over the same span.
August is one of the cooler months of the year in Tumby Bay and a relatively wet time of year, so plan for around 15°C daytime highs and 11.5°C at night.
Not quite — August is the 2nd coolest month in Tumby Bay, averaging 13.3°C.
For August in Tumby Bay, pack light layers you can adjust through the day, with typical highs of 15°C and lows of 11.5°C. Bring an umbrella or light rain jacket too.
Relative humidity in August averages 75% — quite humid.
Average wind speed in August is 5.7 m/s. The windiest August on record averaged 7.2 m/s (1991).
The wettest August on record was 1992 with 130 mm. On average, August sees 52 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 Tumby Bay 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.
