August is one of the cooler months of the year in Southport, with average highs near 20.9°C and lows around 10.6°C (mean 15.8°C). It is one of the drier months, averaging 46 mm of rainfall and 70% relative humidity across the period.
August is one of the cooler months of the year in Southport. Across 45 years of records, the warmest August in Southport was 2024 — when the month averaged 19°C — while the coldest was 1990 at 13°C. Typical August days reach 20.9°C with nights near 10.6°C. The long-term trend is warming, about 0.6°C per decade.
August is one of the drier months in Southport, averaging 46 mm of rainfall. The wettest August on record was 1987 with 146 mm, while the driest was 1991 at 1 mm.
Relative humidity in Southport during August averages 70%. The most humid August was 1999 at 82%, and the least humid was 2018 at 54%.
August receives about 4.3 kWh/m²/day of solar energy in Southport. The sunniest Augusts were 2013 and 2018 at 4.8 kWh/m²/day, and the cloudiest was 2007 at 3.8.
Average wind speed in Southport during August is 2.8 m/s. The windiest August was 2014 at 3.5 m/s, while the calmest were 2009 and 2013 at 2.4 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 14.7°C | 15.3°C | 16.0°C | 16.2°C | 17.0°C | +2.3°C |
| Avg High | 19.5°C | 20.3°C | 21.2°C | 21.6°C | 22.1°C | +2.6°C |
| Avg Low | 10.0°C | 10.3°C | 10.7°C | 10.7°C | 11.9°C | +1.9°C |
| Avg Rain | 63 mm | 40 mm | 44 mm | 45 mm | 32 mm | -31 mm |
August temperatures in Southport have risen by about 2.5°C between 1981–1985 and 2021–2025.
August has ranged from a record low of 3.3°C (2008) to a record high of 33.1°C (2024).
Rainfall in August is one of the drier months, averaging 46 mm, with a wettest year of 146 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.7°C per decade while lows rose 0.4°C per decade, widening the gap between day and night.
A quieter season to visit Southport
If your dates are flexible, the more temperate months of October and November tend to be the most comfortable for visiting Southport. That said, August — with days averaging 20.9°C and nights around 10.6°C (mean 15.8°C) and moderate rainfall (46 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 | 20.2°C | 15.8°C | 11.4°C | 25.7°C | 7.2°C | 60 mm | 75% | 3 m/s | 4.1 |
| 2024 🔥 | 24.0°C | 19.0°C | 13.9°C | 33.1°C | 7.7°C | 74 mm | 74% | 2.9 m/s | 4.1 |
| 2023 | 23.5°C | 18.6°C | 13.6°C | 28.3°C | 9.0°C | 16 mm | 66% | 2.8 m/s | 4.2 |
| 2022 | 20.2°C | 15.4°C | 10.5°C | 24.4°C | 6.8°C | 16 mm | 76% | 2.5 m/s | 4.1 |
| 2021 | 22.6°C | 17.0°C | 11.5°C | 26.1°C | 6.0°C | 8 mm | 69% | 2.5 m/s | 4.4 |
| 2020 | 21.8°C | 16.2°C | 10.6°C | 26.2°C | 6.7°C | 19 mm | 66% | 2.8 m/s | 4.5 |
| 2019 | 22.6°C | 17.0°C | 11.3°C | 26.4°C | 6.1°C | 8 mm | 64% | 2.7 m/s | 4.5 |
| 2018 | 22.9°C | 16.6°C | 10.2°C | 27.3°C | 6.5°C | 16 mm | 54% | 2.6 m/s | 4.8 |
| 2017 | 23.1°C | 16.9°C | 10.7°C | 29.6°C | 6.6°C | 4 mm | 62% | 2.7 m/s | 4.7 |
| 2016 | 21.3°C | 16.4°C | 11.5°C | 24.4°C | 7.8°C | 54 mm | 72% | 2.9 m/s | 4.2 |
| 2015 | 22.2°C | 16.6°C | 11.1°C | 27.5°C | 5.1°C | 28 mm | 69% | 2.5 m/s | 4.2 |
| 2014 | 20.3°C | 15.8°C | 11.2°C | 26.0°C | 8.2°C | 137 mm | 74% | 3.5 m/s | 4 |
| 2013 | 22.2°C | 16.4°C | 10.5°C | 27.6°C | 5.3°C | 5 mm | 69% | 2.4 m/s | 4.8 |
| 2012 | 20.8°C | 15.0°C | 9.3°C | 26.2°C | 5.7°C | 3 mm | 67% | 2.5 m/s | 4.7 |
| 2011 | 20.5°C | 15.9°C | 11.2°C | 23.8°C | 6.9°C | 126 mm | 74% | 2.9 m/s | 4 |
| 2010 | 20.1°C | 15.0°C | 9.9°C | 25.8°C | 6.8°C | 72 mm | 71% | 2.9 m/s | 4 |
| 2009 | 22.9°C | 17.5°C | 12.1°C | 31.4°C | 8.1°C | 8 mm | 73% | 2.4 m/s | 4.6 |
| 2008 | 19.7°C | 14.1°C | 8.4°C | 24.2°C | 3.3°C | 12 mm | 67% | 2.7 m/s | 4.5 |
| 2007 | 21.6°C | 16.7°C | 11.8°C | 26.3°C | 6.3°C | 137 mm | 70% | 3.2 m/s | 3.8 |
| 2006 | 21.3°C | 16.3°C | 11.2°C | 28.2°C | 7.4°C | 83 mm | 71% | 2.9 m/s | 4.3 |
| 2005 | 19.9°C | 15.3°C | 10.6°C | 23.3°C | 6.1°C | 22 mm | 73% | 3 m/s | 4.2 |
| 2004 | 22.6°C | 16.5°C | 10.5°C | 27.8°C | 6.2°C | 19 mm | 59% | 3.1 m/s | 4.6 |
| 2003 | 20.9°C | 16.0°C | 11.0°C | 27.0°C | 4.1°C | 26 mm | 73% | 3 m/s | 4 |
| 2002 | 20.8°C | 16.0°C | 11.3°C | 26.1°C | 6.1°C | 99 mm | 69% | 3.4 m/s | 4 |
| 2001 | 21.1°C | 15.4°C | 9.8°C | 25.3°C | 6.1°C | 16 mm | 63% | 2.8 m/s | 4.6 |
| 2000 | 21.4°C | 16.0°C | 10.5°C | 26.0°C | 6.3°C | 22 mm | 65% | 3 m/s | 4.4 |
| 1999 | 18.6°C | 14.8°C | 10.9°C | 23.2°C | 5.7°C | 93 mm | 82% | 2.8 m/s | 4 |
| 1998 | 20.6°C | 16.6°C | 12.7°C | 23.8°C | 6.1°C | 109 mm | 79% | 3.2 m/s | 3.9 |
| 1997 | 20.3°C | 15.4°C | 10.4°C | 26.0°C | 4.8°C | 7 mm | 70% | 2.7 m/s | 4.3 |
| 1996 | 20.0°C | 15.1°C | 10.2°C | 25.4°C | 6.1°C | 48 mm | 75% | 2.7 m/s | 4.2 |
| 1995 | 21.3°C | 16.3°C | 11.3°C | 29.7°C | 3.9°C | 44 mm | 68% | 2.8 m/s | 4.3 |
| 1994 | 19.9°C | 14.9°C | 10.0°C | 24.3°C | 4.4°C | 21 mm | 69% | 2.6 m/s | 4.4 |
| 1993 | 21.0°C | 16.0°C | 11.0°C | 25.8°C | 5.4°C | 43 mm | 71% | 2.6 m/s | 4.2 |
| 1992 | 20.5°C | 15.0°C | 9.5°C | 24.4°C | 5.8°C | 18 mm | 68% | 2.9 m/s | 4.4 |
| 1991 | 21.9°C | 15.8°C | 9.7°C | 25.9°C | 5.2°C | 1 mm | 62% | 3 m/s | 4.6 |
| 1990 ❄️ | 18.4°C | 13.0°C | 7.6°C | 22.1°C | 4.1°C | 12 mm | 71% | 3.1 m/s | 4.4 |
| 1989 | 18.2°C | 13.3°C | 8.5°C | 24.0°C | 3.4°C | 51 mm | 73% | 2.6 m/s | 4.5 |
| 1988 | 19.2°C | 15.1°C | 11.1°C | 23.6°C | 3.9°C | 85 mm | 80% | 2.9 m/s | 4.1 |
| 1987 🌧️ | 19.7°C | 15.4°C | 11.2°C | 21.8°C | 6.6°C | 146 mm | 79% | 2.7 m/s | 4.2 |
| 1986 | 19.7°C | 14.8°C | 9.9°C | 23.1°C | 7.1°C | 52 mm | 69% | 2.7 m/s | 4 |
| 1985 | 19.3°C | 14.5°C | 9.7°C | 26.7°C | 3.5°C | 38 mm | 75% | 2.5 m/s | 4 |
| 1984 | 19.6°C | 14.1°C | 8.7°C | 22.5°C | 4.1°C | 26 mm | 72% | 2.5 m/s | 4.5 |
| 1983 | 18.4°C | 14.4°C | 10.3°C | 20.9°C | 5.0°C | 84 mm | 77% | 2.6 m/s | — |
| 1982 | 20.5°C | 16.2°C | 11.9°C | 25.6°C | 5.2°C | 50 mm | 70% | 2.6 m/s | — |
| 1981 | 20.8°C | 14.5°C | 8.3°C | 25.5°C | 4.9°C | 36 mm | 63% | 2.9 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 20.9°C with lows near 10.6°C (mean 15.8°C), based on 45 years of NASA POWER data.
August averages 46 mm of rainfall in Southport, one of the drier months. The wettest on record was 146 mm in 1987.
The hottest August reached 33.1°C in 2024. The coldest dipped to 3.3°C in 2008.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average August temperatures have risen by about 2.5°C. Daytime highs moved from 19.7°C to 22.1°C and overnight lows from 9.8°C to 12.2°C over the same span.
August is one of the cooler months of the year in Southport and one of the drier months, so plan for around 20.9°C daytime highs and 10.6°C at night.
Not quite — August is the 3rd coolest month in Southport, averaging 15.8°C.
For August in Southport, pack light layers you can adjust through the day, with typical highs of 20.9°C and lows of 10.6°C.
Relative humidity in August averages 70% — moderately humid.
Average wind speed in August is 2.8 m/s. The windiest August on record averaged 3.5 m/s (2014).
The wettest August on record was 1987 with 146 mm. On average, August sees 46 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 Southport 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.
