Hermanus in Summer
In summer (December, January and February), Hermanus sees average daytime highs around 22°C and overnight lows near 18°C, with 67 mm of rain over about 15 wet days across the season. It is the warmest season of the year and the driest season of the year.
Across summer, daytime highs hold fairly steady around 22°C. The sky is clear or mostly clear about 59% of the time across summer, and the air most often feels humid.
Summer is Hermanus's best season of the year to visit on our travel score. For the whole year in context, see Hermanus's year-round climate.
- Avg daytime high
- 22°C
- warmest season of the year
- Avg overnight low
- 18°C
- Rainfall
- 67 mm
- 15 wet days
- Avg wind
- 20 km/h
- Travel score
- 7.8
- best season of the year
- Months
- Dec · Jan · Feb
Temperature in Hermanus in Summer
Across summer, daytime highs hold fairly steady around 22°C.
A typical summer day in Hermanus reaches about 22°C and drops to 18°C overnight. The warmest of the three months is February, the coolest December.
Hermanus weather by month
How the three summer months (December, January and February) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 22° / 18° | 22 | 4.9 | 14 | 7.9 |
| Feb | 22° / 19° | 21 | 5.3 | 13.3 | 7.9 |
| Mar | 21° / 18° | 27 | 5.9 | 12.3 | 7.5 |
| Apr | 20° / 16° | 42 | 6.4 | 11.2 | 6.9 |
| May | 18° / 14° | 52 | 8.2 | 10.2 | 6.3 |
| Jun | 16° / 12° | 84 | 10.2 | 9.7 | 5.3 |
| Jul | 16° / 12° | 85 | 9.7 | 9.9 | 5.1 |
| Aug | 16° / 12° | 73 | 10.5 | 10.7 | 5.0 |
| Sep | 16° / 13° | 48 | 8.4 | 11.8 | 5.5 |
| Oct | 18° / 14° | 40 | 7.1 | 12.9 | 6.4 |
| Nov | 19° / 16° | 38 | 6.4 | 13.8 | 6.9 |
| Dec | 21° / 17° | 24 | 5.1 | 14.3 | 7.6 |
Cloud cover in Summer
The sky is clear or mostly clear about 59% of the time across summer.
Chance of precipitation in Summer
Hermanus gets around 67 mm of rain over 15 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 20 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 14 h 06 min in early December to 12 h 48 min by late February. The lit band spans sunrise to sunset each day.
Solar energy in Summer
Average shortwave solar energy reaching the ground each day across summer, about 7.4 kWh/m².
Is summer a good time to visit Hermanus?
Our two travel scores rate summer for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
summer is one of the better times to visit Hermanus for general sightseeing.
What to pack for Hermanus in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Hermanus sees daytime highs around 22°C and nights near 18°C. Pack sun protection. Worth having: light clothes. About 15 days see rain.
Sea temperature near Hermanus in Summer
The nearest coast averages about 19°C across summer — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea offshore is warmest in January at about 19°C and coldest in July near 15°C.
The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 19 | 19 | 18 | 16 | 16 | 16 | 15 | 15 | 15 | 16 | 17 | 19 |
| Comfort | Cool | Cool | Cool | Cool | Cool | Cool | Bracing | Bracing | Cool | Cool | Cool | Cool |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 19 | Cool |
| Feb | 19 | Cool |
| Mar | 18 | Cool |
| Apr | 16 | Cool |
| May | 16 | Cool |
| Jun | 16 | Cool |
| Jul | 15 | Bracing |
| Aug | 15 | Bracing |
| Sep | 15 | Cool |
| Oct | 16 | Cool |
| Nov | 17 | Cool |
| Dec | 19 | Cool |
UV index in Hermanus in Summer
Clear-sky midday UV across summer averages around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Hermanus peaks around January 13 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 20 at about 3 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 13 | 10 | 9 | 6 | 3 | 3 | 3 | 4 | 6 | 10 | 11 | 12 |
| Level | Extreme | Very high | Very high | High | Moderate | Moderate | Moderate | Moderate | High | Extreme | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 13 | Extreme |
| Feb | 10 | Very high |
| Mar | 9 | Very high |
| Apr | 6 | High |
| May | 3 | Moderate |
| Jun | 3 | Moderate |
| Jul | 3 | Moderate |
| Aug | 4 | Moderate |
| Sep | 6 | High |
| Oct | 10 | Extreme |
| Nov | 11 | Extreme |
| Dec | 12 | Extreme |
Air quality in Hermanus in Summer
Average fine-particle pollution (PM2.5) through the year — so you can see where summer falls, not just the annual average.
Air quality in Hermanus is worst in June — around 18 µg/m³ PM2.5 (moderate), about 2.6× the cleanest month (November, 7 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 11 | 8 | 12 | 11 | 16 | 18 | 16 | 15 | 13 | 9 | 7 | 8 |
| Level | Good | Good | Moderate | Good | Moderate | Moderate | Moderate | Moderate | Moderate | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 11 | Good |
| Feb | 8 | Good |
| Mar | 12 | Moderate |
| Apr | 11 | Good |
| May | 16 | Moderate |
| Jun | 18 | Moderate |
| Jul | 16 | Moderate |
| Aug | 15 | Moderate |
| Sep | 13 | Moderate |
| Oct | 9 | Good |
| Nov | 7 | Good |
| Dec | 8 | Good |
Where is Hermanus?
Hermanus sits at 34.4°S, 19.2°E, 27 m above sea level, in South Africa. The nearest listed city is Gansbaai, 21 km away.
Topography around Hermanus
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Hermanus.
Within 3 km, the terrain around Hermanus has significant variations in elevation — a maximum elevation change of 314 m around an average of 50 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,155 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,973 m.
The land around Hermanus is covered by water (37%), grassland (20%) and artificial surfaces (20%) within 3 km, water (49%) and grassland (24%) within 16 km, and water (37%) and grassland (28%) within 80 km.
South Africa travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type C / M / N
- 230 V · 50 Hz
- Prices
- ≈ 41% of US
- price level, 2025
- GDP per capita
- $6,598
- 2025
- Happiness
- 5.0 / 10
- World Happiness, 2025
- Safe drinking water
- 68%
- of population, 2024
- Homicide rate
- 43.7
- per 100k, 2022
- Road deaths
- 22.2
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- Very high
- EF EPI 602
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Hermanus (-34.4187°, 19.2345°, elevation 27 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.