September is one of the cooler months of the year in Batemans Bay, with average highs near 17.3°C and lows around 7.3°C (mean 12.3°C). It is one of the drier months, averaging 56 mm of rainfall and 72% relative humidity across the period.
September is one of the cooler months of the year in Batemans Bay. Across 45 years of records, the warmest September in Batemans Bay was 2023 — when the month averaged 15.7°C — while the coldest was 1984 at 10.1°C. Typical September days reach 17.3°C with nights near 7.3°C. The long-term trend is warming, about 0.5°C per decade.
September is one of the drier months in Batemans Bay, averaging 56 mm of rainfall. The wettest September on record was 1985 with 157 mm, while the driest was 2017 at 5 mm.
Relative humidity in Batemans Bay during September averages 72%. The most humid September was 2022 at 83%, and the least humid was 2017 at 53%.
September receives about 4.6 kWh/m²/day of solar energy in Batemans Bay. The sunniest September was 2017 at 5.3 kWh/m²/day, and the cloudiest were 1995 and 1997 at 4.
Average wind speed in Batemans Bay during September is 1.2 m/s. The windiest Septembers were 1996 and 2003 at 1.6 m/s, while the calmest was 1985 at 1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 11.6°C | 11.5°C | 12.9°C | 12.6°C | 13.1°C | +1.5°C |
| Avg High | 16.5°C | 16.2°C | 18.1°C | 17.7°C | 18.2°C | +1.7°C |
| Avg Low | 6.7°C | 6.8°C | 7.7°C | 7.5°C | 8.1°C | +1.4°C |
| Avg Rain | 63 mm | 76 mm | 49 mm | 42 mm | 48 mm | -15 mm |
September temperatures in Batemans Bay have risen by about 1.6°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 1.4°C (1982) to a record high of 31°C (2017).
Rainfall in September is one of the drier months, averaging 56 mm, with a wettest year of 157 mm.
A good time to visit Batemans Bay
September is a good time to visit Batemans Bay, with days averaging 17.3°C and nights around 7.3°C (mean 12.3°C, cooler than Batemans Bay's yearly average) and moderate rainfall. January and February are marginally more temperate, but September still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 18.0°C | 12.8°C | 7.7°C | 23.0°C | 3.8°C | 83 mm | 71% | 1.3 m/s | 4.7 |
| 2024 | 18.8°C | 13.3°C | 7.9°C | 24.2°C | 1.9°C | 22 mm | 62% | 1.4 m/s | 4.7 |
| 2023 🔥 | 22.1°C | 15.7°C | 9.3°C | 30.2°C | 3.9°C | 13 mm | 58% | 1.1 m/s | 5.2 |
| 2022 | 15.3°C | 11.7°C | 8.2°C | 18.3°C | 3.0°C | 110 mm | 83% | 1.1 m/s | 4.1 |
| 2021 | 17.6°C | 12.4°C | 7.2°C | 22.3°C | 4.0°C | 44 mm | 69% | 1.3 m/s | 4.7 |
| 2020 | 17.7°C | 12.9°C | 8.1°C | 23.3°C | 4.2°C | 15 mm | 76% | 1.2 m/s | 4.5 |
| 2019 | 19.1°C | 13.4°C | 7.6°C | 25.0°C | 4.3°C | 40 mm | 62% | 1.2 m/s | 4.6 |
| 2018 | 18.6°C | 12.8°C | 7.0°C | 25.9°C | 3.8°C | 16 mm | 61% | 1.1 m/s | 4.8 |
| 2017 | 19.4°C | 13.4°C | 7.4°C | 31.0°C | 2.9°C | 5 mm | 53% | 1.5 m/s | 5.3 |
| 2016 | 16.7°C | 12.4°C | 8.1°C | 20.6°C | 5.1°C | 60 mm | 78% | 1.2 m/s | 4.1 |
| 2015 | 15.9°C | 11.4°C | 6.9°C | 21.0°C | 3.3°C | 38 mm | 80% | 1.1 m/s | 4.6 |
| 2014 | 16.9°C | 12.3°C | 7.6°C | 23.4°C | 3.7°C | 37 mm | 77% | 1.1 m/s | 4.9 |
| 2013 | 18.3°C | 13.4°C | 8.5°C | 23.8°C | 2.7°C | 104 mm | 74% | 1.2 m/s | 4.6 |
| 2012 | 18.1°C | 12.7°C | 7.3°C | 25.3°C | 2.1°C | 28 mm | 67% | 1.2 m/s | 4.9 |
| 2011 | 17.4°C | 12.3°C | 7.3°C | 24.1°C | 3.1°C | 38 mm | 71% | 1.2 m/s | 4.5 |
| 2010 | 16.7°C | 12.0°C | 7.4°C | 20.9°C | 2.7°C | 57 mm | 74% | 1.2 m/s | 4.5 |
| 2009 | 19.5°C | 13.8°C | 8.2°C | 25.8°C | 3.2°C | 44 mm | 64% | 1.4 m/s | 4.7 |
| 2008 | 18.5°C | 12.9°C | 7.2°C | 25.8°C | 2.1°C | 34 mm | 65% | 1.2 m/s | 4.8 |
| 2007 | 16.6°C | 11.8°C | 7.0°C | 21.0°C | 3.9°C | 27 mm | 71% | 1.2 m/s | 4.9 |
| 2006 | 18.3°C | 13.2°C | 8.2°C | 23.6°C | 5.2°C | 47 mm | 69% | 1.3 m/s | 4.9 |
| 2005 | 17.1°C | 12.2°C | 7.3°C | 23.7°C | 3.7°C | 73 mm | 75% | 1.1 m/s | 4.4 |
| 2004 | 18.2°C | 12.9°C | 7.6°C | 24.2°C | 3.6°C | 71 mm | 71% | 1.1 m/s | 4.4 |
| 2003 | 17.1°C | 12.0°C | 6.8°C | 25.4°C | 2.5°C | 22 mm | 64% | 1.6 m/s | 5.1 |
| 2002 | 19.1°C | 13.4°C | 7.7°C | 25.5°C | 2.6°C | 29 mm | 58% | 1.4 m/s | 4.9 |
| 2001 | 17.8°C | 13.3°C | 8.7°C | 23.6°C | 5.0°C | 72 mm | 80% | 1.1 m/s | 4.5 |
| 2000 | 18.6°C | 13.4°C | 8.2°C | 26.0°C | 3.1°C | 74 mm | 70% | 1.4 m/s | 4.6 |
| 1999 | 18.3°C | 13.4°C | 8.6°C | 23.0°C | 2.9°C | 54 mm | 74% | 1.1 m/s | 4.5 |
| 1998 | 17.1°C | 12.9°C | 8.8°C | 23.1°C | 3.8°C | 43 mm | 81% | 1.2 m/s | 4.3 |
| 1997 | 15.3°C | 11.4°C | 7.5°C | 19.3°C | 2.8°C | 133 mm | 82% | 1.1 m/s | 4 |
| 1996 | 16.2°C | 11.5°C | 6.7°C | 23.4°C | 4.4°C | 71 mm | 71% | 1.6 m/s | 4.8 |
| 1995 | 16.2°C | 11.4°C | 6.7°C | 22.9°C | 1.6°C | 103 mm | 75% | 1.2 m/s | 4 |
| 1994 | 17.3°C | 11.4°C | 5.4°C | 22.4°C | 1.6°C | 20 mm | 60% | 1.3 m/s | 5.2 |
| 1993 | 16.1°C | 11.5°C | 6.8°C | 22.8°C | 3.6°C | 97 mm | 77% | 1.2 m/s | 4.7 |
| 1992 | 14.9°C | 10.2°C | 5.4°C | 20.1°C | 1.8°C | 83 mm | 74% | 1.3 m/s | 4.5 |
| 1991 | 15.6°C | 10.8°C | 6.0°C | 19.6°C | 2.0°C | 32 mm | 75% | 1.3 m/s | 4.8 |
| 1990 | 15.0°C | 10.7°C | 6.5°C | 23.3°C | 3.9°C | 121 mm | 82% | 1.1 m/s | 4.4 |
| 1989 | 15.9°C | 10.8°C | 5.7°C | 21.6°C | 2.4°C | 20 mm | 77% | 1.2 m/s | 5.1 |
| 1988 | 16.4°C | 12.0°C | 7.6°C | 20.5°C | 3.8°C | 77 mm | 78% | 1.2 m/s | 4.6 |
| 1987 | 17.8°C | 12.3°C | 6.7°C | 27.1°C | 1.7°C | 22 mm | 71% | 1.1 m/s | 4.9 |
| 1986 | 16.1°C | 11.6°C | 7.2°C | 23.2°C | 4.1°C | 71 mm | 77% | 1.2 m/s | 4.4 |
| 1985 🌧️ | 15.2°C | 10.9°C | 6.6°C | 20.6°C | 3.4°C | 157 mm | 80% | 1 m/s | 4.5 |
| 1984 ❄️ | 14.4°C | 10.1°C | 5.8°C | 19.3°C | 2.3°C | 69 mm | 79% | 1.2 m/s | 4.4 |
| 1983 | 16.6°C | 11.7°C | 6.9°C | 22.4°C | 2.2°C | 47 mm | 75% | 1.3 m/s | — |
| 1982 | 16.8°C | 11.6°C | 6.3°C | 24.8°C | 1.4°C | 89 mm | 67% | 1.3 m/s | — |
| 1981 | 19.5°C | 13.6°C | 7.6°C | 26.9°C | 2.5°C | 11 mm | 70% | 1.2 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 17.3°C with lows near 7.3°C (mean 12.3°C), based on 45 years of NASA POWER data.
September averages 56 mm of rainfall in Batemans Bay, one of the drier months. The wettest on record was 157 mm in 1985.
The hottest September reached 31°C in 2017. The coldest dipped to 1.4°C in 1982.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 1.6°C. Daytime highs moved from 16.5°C to 18.4°C and overnight lows from 6.6°C to 8.1°C over the same span.
September is one of the cooler months of the year in Batemans Bay and one of the drier months, so plan for around 17.3°C daytime highs and 7.3°C at night.
Not quite — September is the 4th coolest month in Batemans Bay, averaging 12.3°C.
For September in Batemans Bay, pack warm layers and a jacket for chilly mornings, with typical highs of 17.3°C and lows of 7.3°C. Bring an umbrella or light rain jacket too.
Relative humidity in September averages 72% — moderately humid.
Average wind speed in September is 1.2 m/s. The windiest September on record averaged 1.6 m/s (1996).
The wettest September on record was 1985 with 157 mm. On average, September sees 56 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 Batemans Bay behaves each September, 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 September specifically, along with year-by-year records and how the month has changed over the decades.
