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Mossel Bay weather by month
Historical averages 2016–2025 · not a forecast
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When is the best time to visit Mossel Bay?
For a warm holiday, the best week has been 7–13 February (Weather Index 96). Favourable start dates for a 7-day trip run from 29 January to 3 March. January and February are warmest (26°C), May is driest and December has the most sun.
- Warmest
- January and February 26°C
- Coolest
- July and August 19°C
- Driest
- May 17% rain-day chance
- Wettest
- March 27% rain-day chance
- Sunniest
- December 13 hours a day
A rain day has 1 mm or more, snow included, so a short shower counts. Monthly averages below give the amounts.
Monthly averages in Mossel Bay
Mossel Bay historical monthly estimates, 2016–2025. Temperatures and sunshine are daily averages.
| Month | High (°C) | Low (°C) | Rain-day chance (%) | Expected rain days | Precipitation (mm/month) | Sunshine (hours/day) |
|---|---|---|---|---|---|---|
| January | 26.1 | 19.3 | 24.5 | 7.6 | 42.7 | 12.4 |
| February | 26.1 | 19.2 | 26.1 | 7.3 | 30.0 | 12.0 |
| March | 24.9 | 18.3 | 26.8 | 8.3 | 42.0 | 10.8 |
| April | 22.9 | 15.6 | 22.0 | 6.6 | 35.6 | 9.9 |
| May | 21.6 | 13.5 | 16.8 | 5.2 | 33.0 | 9.0 |
| June | 19.9 | 11.9 | 23.0 | 6.9 | 39.0 | 8.1 |
| July | 19.0 | 10.7 | 22.6 | 7.0 | 33.6 | 8.8 |
| August | 19.2 | 10.9 | 20.3 | 6.3 | 29.6 | 10.0 |
| September | 20.1 | 12.7 | 25.3 | 7.6 | 48.3 | 10.2 |
| October | 21.9 | 14.5 | 23.5 | 7.3 | 41.2 | 11.6 |
| November | 23.0 | 16.0 | 25.7 | 7.7 | 38.7 | 12.3 |
| December | 24.8 | 17.9 | 25.2 | 7.8 | 31.8 | 12.7 |
Each month averages its own days. Precipitation includes snow. About the data
Sources
Open-Meteo · 1 Jan 2016 – 31 Dec 2025
- Open-Meteo Historical Weather API
- Local days, 2016–2025, every year weighted equally. Each weekly chart averages its own seven days, without smoothing.
- Shading shows the 10th–90th percentile of past days, not forecast confidence.
- A rain day has at least 1 mm, snow included. The last weekly period has eight days.
- Wind is the average daytime (10:00–18:00) maximum, not gusts. Daylight is calculated from latitude. Missing readings stay blank.
- Mugginess (dew point) comes from the original daily summaries, on UTC days.
- The live two-week forecast comes from the Open-Meteo Weather Forecast API. The Weather Index does not use it.