March is one of the cooler months of the year in Oceanside, with average highs near 17.5°C and lows around 12.6°C (mean 15.1°C). It is a relatively wet time of year, averaging 53 mm of rainfall and 75% relative humidity across the period.
March is one of the cooler months of the year in Oceanside. Across 45 years of records, the warmest March in Oceanside was 2015 — when the month averaged 18.4°C — while the coldest was 1999 at 12.9°C. Typical March days reach 17.5°C with nights near 12.6°C. The long-term March temperature trend is broadly flat.
March is a relatively wet time of year in Oceanside, averaging 53 mm of rainfall. The wettest March on record was 1983 with 182 mm, while the driest was 1997 at 0 mm.
Relative humidity in Oceanside during March averages 75%. The most humid March was 2001 at 81%, and the least humid was 1988 at 66%.
March receives about 5.2 kWh/m²/day of solar energy in Oceanside. The sunniest March was 2008 at 6 kWh/m²/day, and the cloudiest was 1992 at 4.2.
Average wind speed in Oceanside during March is 2.9 m/s. The windiest March was 1983 at 4.3 m/s, while the calmest was 2015 at 2 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 15.2°C | 15.0°C | 14.8°C | 15.5°C | 14.5°C | -0.7°C |
| Avg High | 17.9°C | 17.4°C | 17.3°C | 17.9°C | 16.6°C | -1.3°C |
| Avg Low | 12.6°C | 12.6°C | 12.4°C | 13.0°C | 12.3°C | -0.3°C |
| Avg Rain | 64 mm | 72 mm | 26 mm | 35 mm | 78 mm | +14 mm |
March temperatures in Oceanside have fallen by about 0.5°C between 1981–1985 and 2021–2025.
March has ranged from a record low of 8.2°C (1989) to a record high of 27.9°C (2015).
Rainfall in March is a relatively wet time of year, averaging 53 mm, with a wettest year of 182 mm.
A quieter season to visit Oceanside
If your dates are flexible, the more temperate months of August and September tend to be the most comfortable for visiting Oceanside. That said, March — with days averaging 17.5°C and nights around 12.6°C (mean 15.1°C) and moderate rainfall (53 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 | 16.5°C | 14.3°C | 12.0°C | 22.9°C | 8.9°C | 66 mm | 80% | 3.4 m/s | 5.1 |
| 2024 | 16.6°C | 14.8°C | 13.1°C | 19.5°C | 12.1°C | 81 mm | 81% | 3.2 m/s | 5.1 |
| 2023 | 14.9°C | 13.0°C | 11.1°C | 19.4°C | 9.2°C | 144 mm | 79% | 3.3 m/s | 4.7 |
| 2022 | 18.7°C | 16.1°C | 13.6°C | 25.0°C | 10.9°C | 43 mm | 74% | 2.7 m/s | 5.9 |
| 2021 | 16.5°C | 14.0°C | 11.5°C | 25.6°C | 9.3°C | 36 mm | 74% | 3.1 m/s | 5.7 |
| 2020 | 16.6°C | 14.6°C | 12.7°C | 20.6°C | 10.8°C | 98 mm | 77% | 3.1 m/s | 4.8 |
| 2019 | 16.7°C | 14.7°C | 12.8°C | 21.8°C | 10.5°C | 66 mm | 80% | 2.8 m/s | 5.2 |
| 2018 | 17.5°C | 15.2°C | 12.9°C | 22.3°C | 10.1°C | 59 mm | 74% | 2.5 m/s | 5.2 |
| 2017 | 19.1°C | 16.5°C | 13.9°C | 23.5°C | 10.3°C | 8 mm | 74% | 2.4 m/s | 5.8 |
| 2016 | 18.4°C | 15.9°C | 13.5°C | 23.7°C | 11.6°C | 39 mm | 77% | 3 m/s | 5.6 |
| 2015 🔥 | 21.2°C | 18.4°C | 15.5°C | 27.9°C | 12.1°C | 24 mm | 70% | 2 m/s | 5.8 |
| 2014 | 18.9°C | 16.3°C | 13.8°C | 26.0°C | 12.1°C | 21 mm | 76% | 2.6 m/s | 5.5 |
| 2013 | 17.5°C | 14.9°C | 12.3°C | 23.6°C | 9.7°C | 28 mm | 76% | 2.1 m/s | 5.5 |
| 2012 | 16.1°C | 13.7°C | 11.2°C | 23.9°C | 9.3°C | 42 mm | 75% | 2.9 m/s | 5.3 |
| 2011 | 16.6°C | 14.2°C | 11.8°C | 24.0°C | 9.5°C | 48 mm | 78% | 2.8 m/s | 5.2 |
| 2010 | 17.5°C | 15.0°C | 12.6°C | 23.1°C | 10.7°C | 17 mm | 72% | 2.9 m/s | 5.7 |
| 2009 | 16.8°C | 14.3°C | 11.9°C | 23.5°C | 9.4°C | 5 mm | 74% | 2.4 m/s | 5.6 |
| 2008 | 17.4°C | 14.8°C | 12.2°C | 22.7°C | 10.0°C | 3 mm | 75% | 2.2 m/s | 6 |
| 2007 | 18.3°C | 15.3°C | 12.3°C | 24.0°C | 9.7°C | 8 mm | 70% | 2.4 m/s | 5.5 |
| 2006 | 15.0°C | 13.0°C | 11.1°C | 20.2°C | 9.1°C | 58 mm | 74% | 3.3 m/s | 5 |
| 2005 | 17.7°C | 15.5°C | 13.3°C | 21.9°C | 12.2°C | 36 mm | 79% | 3 m/s | 5 |
| 2004 | 19.6°C | 16.6°C | 13.6°C | 25.7°C | 10.7°C | 13 mm | 75% | 2.2 m/s | 5.4 |
| 2003 | 18.0°C | 15.5°C | 13.0°C | 24.0°C | 10.9°C | 48 mm | 74% | 2.9 m/s | 5.6 |
| 2002 | 17.1°C | 14.5°C | 11.9°C | 20.9°C | 9.6°C | 20 mm | 71% | 3.2 m/s | 5.6 |
| 2001 | 16.4°C | 14.3°C | 12.1°C | 22.7°C | 10.5°C | 31 mm | 81% | 2.6 m/s | 4.9 |
| 2000 | 17.0°C | 14.6°C | 12.1°C | 21.4°C | 9.9°C | 38 mm | 75% | 2.8 m/s | 5.3 |
| 1999 ❄️ | 14.9°C | 12.9°C | 10.9°C | 20.1°C | 8.4°C | 30 mm | 78% | 3.1 m/s | 4.9 |
| 1998 | 16.9°C | 14.9°C | 12.9°C | 21.8°C | 9.9°C | 83 mm | 77% | 3.2 m/s | 5 |
| 1997 | 19.7°C | 16.4°C | 13.2°C | 25.5°C | 9.7°C | 0 mm | 69% | 2.2 m/s | 5.4 |
| 1996 | 17.9°C | 15.3°C | 12.7°C | 23.0°C | 11.3°C | 43 mm | 75% | 2.7 m/s | 5.2 |
| 1995 | 18.0°C | 15.7°C | 13.3°C | 21.2°C | 10.2°C | 146 mm | 77% | 3.1 m/s | 4.9 |
| 1994 | 18.3°C | 15.7°C | 13.1°C | 24.9°C | 11.1°C | 70 mm | 75% | 2.4 m/s | 5 |
| 1993 | 18.5°C | 16.1°C | 13.7°C | 23.2°C | 11.5°C | 35 mm | 77% | 2.6 m/s | 4.9 |
| 1992 | 16.9°C | 15.1°C | 13.3°C | 19.4°C | 11.8°C | 124 mm | 80% | 3 m/s | 4.2 |
| 1991 | 15.6°C | 13.3°C | 11.1°C | 20.7°C | 8.3°C | 170 mm | 74% | 4.2 m/s | 5.2 |
| 1990 | 17.1°C | 14.6°C | 12.2°C | 21.7°C | 8.9°C | 15 mm | 73% | 2.7 m/s | 4.8 |
| 1989 | 18.0°C | 15.2°C | 12.5°C | 22.8°C | 8.2°C | 31 mm | 74% | 2.9 m/s | 5.3 |
| 1988 | 20.0°C | 16.5°C | 13.0°C | 26.8°C | 10.7°C | 7 mm | 66% | 2.5 m/s | 5.6 |
| 1987 | 17.7°C | 14.9°C | 12.1°C | 23.3°C | 10.4°C | 38 mm | 71% | 3.5 m/s | 4.9 |
| 1986 | 19.0°C | 16.3°C | 13.6°C | 25.1°C | 10.5°C | 97 mm | 75% | 2.8 m/s | 4.4 |
| 1985 | 16.4°C | 13.8°C | 11.2°C | 21.4°C | 8.9°C | 24 mm | 72% | 3.3 m/s | 5 |
| 1984 | 19.7°C | 16.7°C | 13.7°C | 23.7°C | 11.7°C | 3 mm | 68% | 3 m/s | 5.1 |
| 1983 🌧️ | 16.7°C | 14.8°C | 12.9°C | 22.0°C | 11.0°C | 182 mm | 80% | 4.3 m/s | — |
| 1982 | 16.5°C | 14.2°C | 12.0°C | 19.6°C | 10.1°C | 126 mm | 73% | 3.4 m/s | — |
| 1981 | 17.2°C | 14.8°C | 12.3°C | 20.7°C | 11.1°C | 71 mm | 75% | 3.3 m/s | — |
Actual recorded March data for each year, 1981–2025 — sourced from NASA POWER.
The average high in March is around 17.5°C with lows near 12.6°C (mean 15.1°C), based on 45 years of NASA POWER data.
March averages 53 mm of rainfall in Oceanside, a relatively wet time of year. The wettest on record was 182 mm in 1983.
The hottest March reached 27.9°C in 2015. The coldest dipped to 8.2°C in 1989.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average March temperatures have fallen by about 0.5°C. Daytime highs moved from 17.3°C to 16.6°C and overnight lows from 12.4°C to 12.3°C over the same span.
March is one of the cooler months of the year in Oceanside and a relatively wet time of year, so plan for around 17.5°C daytime highs and 12.6°C at night.
Not quite — March is the 3rd coolest month in Oceanside, averaging 15.1°C.
For March in Oceanside, pack light layers you can adjust through the day, with typical highs of 17.5°C and lows of 12.6°C. Bring an umbrella or light rain jacket too.
Relative humidity in March averages 75% — moderately humid.
Average wind speed in March is 2.9 m/s. The windiest March on record averaged 4.3 m/s (1983).
The wettest March on record was 1983 with 182 mm. On average, March sees 53 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 Oceanside 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.
