August is one of the warmer months of the year in Oceanside, with average highs near 24.7°C and lows around 19°C (mean 21.9°C). It is one of the drier months, averaging 6 mm of rainfall and 72% relative humidity across the period.
August is one of the warmer months of the year in Oceanside. Across 45 years of records, the warmest August in Oceanside was 1984 — when the month averaged 23.5°C — while the coldest was 2010 at 19.8°C. Typical August days reach 24.7°C with nights near 19°C. The long-term August temperature trend is broadly flat.
August is one of the drier months in Oceanside, averaging 6 mm of rainfall. The wettest August on record was 2023 with 53 mm, while the driest were 2002, 2009 and 2020 at 0 mm.
Relative humidity in Oceanside during August averages 72%. The most humid Augusts were 1991 and 2023 at 76%, and the least humid were 1981 and 1986 at 64%.
August receives about 6.9 kWh/m²/day of solar energy in Oceanside. The sunniest Augusts were 2010, 2019 and 2024, among others at 7.3 kWh/m²/day, and the cloudiest was 1984 at 6.2.
Average wind speed in Oceanside during August is 2.2 m/s. The windiest August was 1995 at 2.7 m/s, while the calmest was 2025 at 1.8 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 22.1°C | 22.1°C | 21.5°C | 21.6°C | 22.3°C | +0.2°C |
| Avg High | 25.1°C | 25.0°C | 24.2°C | 24.5°C | 25.0°C | -0.1°C |
| Avg Low | 19.1°C | 19.2°C | 18.8°C | 18.7°C | 19.5°C | +0.4°C |
| Avg Rain | 8 mm | 4 mm | 4 mm | 4 mm | 11 mm | +3 mm |
August temperatures in Oceanside have fallen by about 0.6°C between 1981–1985 and 2021–2025.
August has ranged from a record low of 14.1°C (2010) to a record high of 32.2°C (1985).
Rainfall in August is one of the drier months, averaging 6 mm, with a wettest year of 53 mm.
One of the best times to visit Oceanside
August is one of the best times to visit Oceanside. Expect days averaging 24.7°C and nights around 19°C (mean 21.9°C) — warmer than Oceanside's yearly average — with low rainfall (6 mm), so conditions are generally comfortable for sightseeing and outdoor plans.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 24.4°C | 21.6°C | 18.7°C | 28.4°C | 15.8°C | 5 mm | 73% | 1.8 m/s | 7 |
| 2024 | 25.0°C | 22.2°C | 19.4°C | 29.8°C | 17.2°C | 2 mm | 72% | 2.2 m/s | 7.3 |
| 2023 🌧️ | 24.7°C | 22.0°C | 19.4°C | 28.6°C | 16.8°C | 53 mm | 76% | 2.6 m/s | 6.8 |
| 2022 | 25.9°C | 23.2°C | 20.5°C | 30.3°C | 18.6°C | 4 mm | 71% | 2.5 m/s | 7 |
| 2021 | 24.6°C | 21.9°C | 19.2°C | 28.4°C | 16.1°C | 3 mm | 73% | 2.3 m/s | 6.7 |
| 2020 | 25.5°C | 22.7°C | 19.9°C | 31.6°C | 16.1°C | 0 mm | 73% | 2.2 m/s | 7.1 |
| 2019 | 24.2°C | 21.2°C | 18.1°C | 28.6°C | 15.5°C | 1 mm | 72% | 2 m/s | 7.3 |
| 2018 | 25.9°C | 23.3°C | 20.7°C | 30.9°C | 18.6°C | 2 mm | 73% | 2.2 m/s | 7.2 |
| 2017 | 24.6°C | 21.6°C | 18.7°C | 30.2°C | 16.0°C | 8 mm | 73% | 2.2 m/s | 6.8 |
| 2016 | 24.6°C | 21.7°C | 18.7°C | 29.7°C | 16.0°C | 1 mm | 73% | 2.3 m/s | 7.2 |
| 2015 | 25.2°C | 22.5°C | 19.8°C | 30.2°C | 17.1°C | 5 mm | 75% | 2.3 m/s | 7 |
| 2014 | 25.2°C | 22.3°C | 19.5°C | 28.9°C | 17.4°C | 10 mm | 74% | 2.1 m/s | 7.1 |
| 2013 | 23.4°C | 20.6°C | 17.8°C | 28.0°C | 15.2°C | 7 mm | 74% | 2 m/s | 6.9 |
| 2012 | 25.9°C | 23.0°C | 20.2°C | 29.3°C | 16.3°C | 5 mm | 71% | 2.2 m/s | 6.9 |
| 2011 | 23.0°C | 20.1°C | 17.1°C | 29.0°C | 14.9°C | 1 mm | 74% | 2 m/s | 7.1 |
| 2010 ❄️ | 22.7°C | 19.8°C | 16.9°C | 29.4°C | 14.1°C | 1 mm | 72% | 2.1 m/s | 7.3 |
| 2009 | 24.4°C | 21.5°C | 18.5°C | 30.4°C | 15.3°C | 0 mm | 71% | 2.1 m/s | 7.1 |
| 2008 | 24.6°C | 21.8°C | 19.0°C | 28.3°C | 17.0°C | 3 mm | 73% | 2 m/s | 7 |
| 2007 | 25.0°C | 22.3°C | 19.5°C | 30.2°C | 16.9°C | 6 mm | 73% | 2.1 m/s | 7.1 |
| 2006 | 24.0°C | 21.4°C | 18.8°C | 28.0°C | 16.6°C | 1 mm | 74% | 2.3 m/s | 7.3 |
| 2005 | 23.9°C | 21.3°C | 18.7°C | 28.9°C | 16.7°C | 3 mm | 75% | 1.9 m/s | 6.8 |
| 2004 | 23.3°C | 20.8°C | 18.3°C | 28.1°C | 16.4°C | 2 mm | 75% | 2 m/s | 7 |
| 2003 | 25.3°C | 22.5°C | 19.8°C | 28.3°C | 18.1°C | 8 mm | 74% | 2.3 m/s | 7.2 |
| 2002 | 23.1°C | 20.3°C | 17.5°C | 28.6°C | 15.4°C | 0 mm | 75% | 2 m/s | 6.9 |
| 2001 | 23.8°C | 20.9°C | 18.1°C | 28.4°C | 16.2°C | 1 mm | 74% | 2.2 m/s | 7 |
| 2000 | 24.9°C | 22.3°C | 19.6°C | 28.0°C | 17.6°C | 15 mm | 72% | 2.2 m/s | 6.8 |
| 1999 | 23.8°C | 20.9°C | 18.0°C | 28.2°C | 16.0°C | 2 mm | 70% | 2.4 m/s | 7.1 |
| 1998 | 26.1°C | 23.2°C | 20.4°C | 30.9°C | 17.7°C | 5 mm | 73% | 2.1 m/s | 6.9 |
| 1997 | 25.3°C | 22.7°C | 20.0°C | 31.4°C | 17.8°C | 1 mm | 74% | 2.4 m/s | 7 |
| 1996 | 26.1°C | 22.9°C | 19.6°C | 30.5°C | 15.6°C | 1 mm | 71% | 2.4 m/s | 7.2 |
| 1995 | 25.2°C | 22.3°C | 19.5°C | 28.8°C | 17.6°C | 1 mm | 70% | 2.7 m/s | 6.8 |
| 1994 | 25.9°C | 23.0°C | 20.2°C | 29.8°C | 17.3°C | 5 mm | 71% | 2.2 m/s | 6.7 |
| 1993 | 23.6°C | 20.8°C | 18.1°C | 28.6°C | 15.9°C | 1 mm | 75% | 2.3 m/s | 6.6 |
| 1992 | 26.1°C | 23.3°C | 20.5°C | 29.1°C | 17.6°C | 13 mm | 73% | 2.3 m/s | 6.7 |
| 1991 | 23.0°C | 20.2°C | 17.5°C | 27.7°C | 15.1°C | 4 mm | 76% | 2.2 m/s | 6.5 |
| 1990 | 24.6°C | 21.5°C | 18.5°C | 29.5°C | 16.8°C | 4 mm | 74% | 2.5 m/s | 6.6 |
| 1989 | 23.5°C | 20.8°C | 18.1°C | 27.0°C | 16.0°C | 1 mm | 74% | 2.4 m/s | 6.9 |
| 1988 | 23.9°C | 21.0°C | 18.2°C | 27.9°C | 16.1°C | 7 mm | 76% | 2.6 m/s | 6.6 |
| 1987 | 23.9°C | 20.8°C | 17.8°C | 28.5°C | 15.3°C | 4 mm | 73% | 2.6 m/s | 6.7 |
| 1986 | 25.7°C | 22.5°C | 19.4°C | 28.9°C | 17.1°C | 3 mm | 64% | 2.1 m/s | 7 |
| 1985 | 24.9°C | 21.8°C | 18.7°C | 32.2°C | 16.8°C | 1 mm | 67% | 2.2 m/s | 6.9 |
| 1984 🔥 | 26.3°C | 23.5°C | 20.7°C | 29.0°C | 18.6°C | 14 mm | 71% | 2.3 m/s | 6.2 |
| 1983 | 26.2°C | 23.2°C | 20.3°C | 30.9°C | 17.5°C | 33 mm | 73% | 2.3 m/s | — |
| 1982 | 25.6°C | 22.5°C | 19.3°C | 29.6°C | 17.0°C | 7 mm | 67% | 2.4 m/s | — |
| 1981 | 26.1°C | 22.8°C | 19.5°C | 30.5°C | 16.9°C | 4 mm | 64% | 2.4 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 24.7°C with lows near 19°C (mean 21.9°C), based on 45 years of NASA POWER data.
August averages 6 mm of rainfall in Oceanside, one of the drier months. The wettest on record was 53 mm in 2023.
The hottest August reached 32.2°C in 1985. The coldest dipped to 14.1°C in 2010.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average August temperatures have fallen by about 0.6°C. Daytime highs moved from 25.8°C to 24.9°C and overnight lows from 19.7°C to 19.4°C over the same span.
August is one of the warmer months of the year in Oceanside and one of the drier months, so plan for around 24.7°C daytime highs and 19°C at night.
Not quite — August is the 12th coolest month in Oceanside, averaging 21.9°C.
For August in Oceanside, pack light layers you can adjust through the day, with typical highs of 24.7°C and lows of 19°C.
Relative humidity in August averages 72% — moderately humid.
Average wind speed in August is 2.2 m/s. The windiest August on record averaged 2.7 m/s (1995).
The wettest August on record was 2023 with 53 mm. On average, August sees 6 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 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.
