March is one of the cooler months of the year in Southport, with average highs near 8.5°C and lows around 3.5°C (mean 6°C). It is about average for rainfall, averaging 71 mm of rainfall and 88% relative humidity across the period.
March is one of the cooler months of the year in Southport. Across 45 years of records, the warmest March in Southport was 2012 — when the month averaged 8°C — while the coldest was 2013 at 2.5°C. Typical March days reach 8.5°C with nights near 3.5°C. The long-term trend is warming, about 0.3°C per decade.
March is about average for rainfall in Southport, averaging 71 mm of rainfall. The wettest March on record was 1981 with 141 mm, while the driest was 2025 at 22 mm.
Relative humidity in Southport during March averages 88%. The most humid March was 1981 at 91%, and the least humid was 2008 at 85%.
March receives about 2.4 kWh/m²/day of solar energy in Southport. The sunniest March was 2025 at 3 kWh/m²/day, and the cloudiest was 1991 at 1.8.
Average wind speed in Southport during March is 4.4 m/s. The windiest March was 1994 at 6 m/s, while the calmest was 2011 at 2.8 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 5.1°C | 6.3°C | 6.1°C | 5.9°C | 6.9°C | +1.8°C |
| Avg High | 7.4°C | 8.7°C | 8.7°C | 8.5°C | 9.6°C | +2.2°C |
| Avg Low | 2.8°C | 3.9°C | 3.6°C | 3.3°C | 4.2°C | +1.4°C |
| Avg Rain | 88 mm | 69 mm | 60 mm | 71 mm | 67 mm | -21 mm |
March temperatures in Southport have risen by about 1.7°C between 1981–1985 and 2021–2025.
March has ranged from a record low of -4.9°C (1986) to a record high of 16.2°C (2012).
Rainfall in March is about average for rainfall, averaging 71 mm, with a wettest year of 141 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.4°C per decade while lows rose 0.2°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 July and August tend to be the most comfortable for visiting Southport. That said, March — with days averaging 8.5°C and nights around 3.5°C (mean 6°C) and moderate rainfall (71 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 | 10.6°C | 7.3°C | 4.0°C | 14.5°C | -0.8°C | 22 mm | 87% | 3.3 m/s | 3 |
| 2024 | 9.5°C | 7.3°C | 5.0°C | 12.9°C | 1.1°C | 99 mm | 90% | 4.5 m/s | 2.3 |
| 2023 | 8.8°C | 6.5°C | 4.3°C | 13.4°C | -0.3°C | 113 mm | 87% | 4.2 m/s | 2.3 |
| 2022 | 10.7°C | 7.4°C | 4.1°C | 15.5°C | -0.8°C | 34 mm | 86% | 3.7 m/s | 2.8 |
| 2021 | 9.0°C | 6.7°C | 4.5°C | 15.6°C | 0.3°C | 75 mm | 88% | 4.2 m/s | 2.4 |
| 2020 | 9.1°C | 6.2°C | 3.2°C | 14.5°C | 0.3°C | 59 mm | 87% | 4.5 m/s | 2.8 |
| 2019 | 9.6°C | 7.3°C | 4.9°C | 13.8°C | 2.8°C | 126 mm | 87% | 4.9 m/s | 2.4 |
| 2018 | 6.7°C | 4.2°C | 1.7°C | 11.6°C | -4.1°C | 91 mm | 89% | 4.5 m/s | 2.3 |
| 2017 | 10.2°C | 7.5°C | 4.9°C | 14.4°C | 0.6°C | 103 mm | 89% | 4.1 m/s | 2.5 |
| 2016 | 8.0°C | 5.4°C | 2.8°C | 11.4°C | 0.4°C | 75 mm | 88% | 3.6 m/s | 2.5 |
| 2015 | 8.3°C | 5.6°C | 2.8°C | 12.4°C | -0.1°C | 78 mm | 87% | 4.7 m/s | 2.4 |
| 2014 | 9.5°C | 6.8°C | 4.1°C | 14.3°C | 0.2°C | 51 mm | 88% | 4.3 m/s | 2.6 |
| 2013 ❄️ | 4.8°C | 2.5°C | 0.3°C | 8.4°C | -2.0°C | 65 mm | 87% | 4.4 m/s | 2.3 |
| 2012 🔥 | 10.9°C | 8.0°C | 5.1°C | 16.2°C | 2.1°C | 26 mm | 87% | 3.2 m/s | 2.7 |
| 2011 | 9.2°C | 6.3°C | 3.4°C | 13.9°C | -0.6°C | 30 mm | 88% | 2.8 m/s | 2.7 |
| 2010 | 7.8°C | 5.3°C | 2.7°C | 11.3°C | -2.9°C | 63 mm | 89% | 3.4 m/s | 2.5 |
| 2009 | 8.6°C | 6.3°C | 4.0°C | 12.3°C | 0.1°C | 47 mm | 88% | 4.5 m/s | 2.6 |
| 2008 | 8.1°C | 5.7°C | 3.4°C | 11.0°C | 0.1°C | 88 mm | 85% | 5.6 m/s | 2.4 |
| 2007 | 9.5°C | 6.8°C | 4.1°C | 13.5°C | -0.8°C | 59 mm | 88% | 4.7 m/s | 2.7 |
| 2006 | 7.0°C | 4.6°C | 2.3°C | 12.2°C | -1.5°C | 115 mm | 87% | 4.6 m/s | 2.2 |
| 2005 | 9.4°C | 7.0°C | 4.5°C | 14.9°C | -1.8°C | 56 mm | 89% | 4 m/s | 2.2 |
| 2004 | 8.5°C | 5.9°C | 3.3°C | 13.9°C | -0.8°C | 55 mm | 88% | 4.4 m/s | 2.4 |
| 2003 | 10.1°C | 6.8°C | 3.5°C | 13.4°C | 0.0°C | 30 mm | 88% | 3.7 m/s | 2.9 |
| 2002 | 9.5°C | 6.8°C | 4.1°C | 12.8°C | -0.3°C | 39 mm | 89% | 4.3 m/s | 2.6 |
| 2001 | 7.0°C | 4.5°C | 2.1°C | 11.5°C | -3.1°C | 63 mm | 88% | 3.9 m/s | 2.5 |
| 2000 | 9.2°C | 6.8°C | 4.4°C | 12.6°C | -0.1°C | 50 mm | 88% | 4.4 m/s | 2.4 |
| 1999 | 8.5°C | 6.3°C | 4.1°C | 13.7°C | 0.0°C | 84 mm | 90% | 4.1 m/s | 2.4 |
| 1998 | 9.8°C | 7.5°C | 5.2°C | 14.7°C | 0.7°C | 125 mm | 90% | 4.2 m/s | 2.1 |
| 1997 | 10.1°C | 7.5°C | 4.9°C | 14.4°C | 0.6°C | 41 mm | 89% | 4.5 m/s | 2.4 |
| 1996 | 6.9°C | 4.1°C | 1.4°C | 9.8°C | -2.7°C | 47 mm | 87% | 4.1 m/s | 2 |
| 1995 | 7.1°C | 4.8°C | 2.5°C | 12.0°C | -1.2°C | 80 mm | 86% | 5.3 m/s | 2.1 |
| 1994 | 8.2°C | 6.1°C | 4.0°C | 12.3°C | 0.5°C | 89 mm | 87% | 6 m/s | 2.1 |
| 1993 | 8.7°C | 5.9°C | 3.1°C | 13.2°C | -0.8°C | 23 mm | 87% | 4.4 m/s | 2.2 |
| 1992 | 8.7°C | 6.6°C | 4.4°C | 11.7°C | 0.7°C | 95 mm | 88% | 5.4 m/s | 2 |
| 1991 | 9.7°C | 6.9°C | 4.2°C | 14.3°C | 0.3°C | 79 mm | 90% | 3.8 m/s | 1.8 |
| 1990 | 9.8°C | 7.3°C | 4.9°C | 15.2°C | 0.5°C | 26 mm | 86% | 5.6 m/s | 2.3 |
| 1989 | 9.0°C | 6.5°C | 4.0°C | 13.2°C | -1.3°C | 89 mm | 87% | 5 m/s | 2.1 |
| 1988 | 7.0°C | 5.1°C | 3.2°C | 10.5°C | -0.4°C | 110 mm | 90% | 4.4 m/s | 2.1 |
| 1987 | 6.0°C | 3.7°C | 1.4°C | 11.9°C | -2.5°C | 101 mm | 89% | 5 m/s | 2.4 |
| 1986 | 6.8°C | 4.2°C | 1.6°C | 10.7°C | -4.9°C | 83 mm | 89% | 5 m/s | 2.5 |
| 1985 | 6.8°C | 4.3°C | 1.7°C | 11.7°C | -2.3°C | 52 mm | 87% | 4 m/s | 2.3 |
| 1984 | 6.7°C | 4.2°C | 1.7°C | 9.1°C | -1.2°C | 44 mm | 89% | 3.5 m/s | 2.2 |
| 1983 | 7.6°C | 5.6°C | 3.7°C | 10.5°C | 0.0°C | 80 mm | 90% | 4.6 m/s | — |
| 1982 | 8.1°C | 5.6°C | 3.1°C | 12.9°C | 1.0°C | 96 mm | 87% | 4.6 m/s | — |
| 1981 🌧️ | 9.0°C | 6.7°C | 4.4°C | 11.5°C | -0.6°C | 141 mm | 91% | 4.6 m/s | — |
Actual recorded March data for each year, 1981–2025 — sourced from NASA POWER.
The average high in March is around 8.5°C with lows near 3.5°C (mean 6°C), based on 45 years of NASA POWER data.
March averages 71 mm of rainfall in Southport, about average for rainfall. The wettest on record was 141 mm in 1981.
The hottest March reached 16.2°C in 2012. The coldest dipped to -4.9°C in 1986.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average March temperatures have risen by about 1.7°C. Daytime highs moved from 7.6°C to 9.7°C and overnight lows from 2.9°C to 4.4°C over the same span.
March is one of the cooler months of the year in Southport and about average for rainfall, so plan for around 8.5°C daytime highs and 3.5°C at night.
Not quite — March is the 4th coolest month in Southport, averaging 6°C.
For March in Southport, pack warm layers and a jacket for chilly mornings, with typical highs of 8.5°C and lows of 3.5°C. Bring an umbrella or light rain jacket too.
Relative humidity in March averages 88% — quite humid.
Average wind speed in March is 4.4 m/s. The windiest March on record averaged 6 m/s (1994).
The wettest March on record was 1981 with 141 mm. On average, March sees 71 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 March, 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 March specifically, along with year-by-year records and how the month has changed over the decades.
