Beach
Grotto Beach
Western Cape · South Africa · Atlantic Ocean
-34.4166, 19.2926 · Hermanus, 5 km
- 19°Sea · January
- 25°High · February
- 11.0 hSunshine · January
Your month at the beach
Grotto Beach in January
- 25°CAir, daytime high17°C at night
- 19°CSea temperature
- 11.0 hSunshine a day
- 5 daysRainy days in the month28 mm in total
- 21 km/hAverage wind
Averages for 1991–2020. A rainy day is a day with at least 1 mm of rain.
And a month earlier or later?
| December | January | February | |
|---|---|---|---|
| Air, daytime high | 24° | 25° | 25° |
| Sea | 18° | 19° | 19° |
| Sunshine a day | 11.0 h | 11.0 h | 10.1 h |
| Rainy days | 5 | 5 | 6 |
Grotto Beach in February
- 25°CAir, daytime high17°C at night
- 19°CSea temperature
- 10.1 hSunshine a day
- 6 daysRainy days in the month22 mm in total
- 20 km/hAverage wind
Averages for 1991–2020. A rainy day is a day with at least 1 mm of rain.
And a month earlier or later?
| January | February | March | |
|---|---|---|---|
| Air, daytime high | 25° | 25° | 24° |
| Sea | 19° | 19° | 17° |
| Sunshine a day | 11.0 h | 10.1 h | 9.0 h |
| Rainy days | 5 | 6 | 6 |
Grotto Beach in March
- 24°CAir, daytime high16°C at night
- 17°CSea temperature
- 9.0 hSunshine a day
- 6 daysRainy days in the month36 mm in total
- 19 km/hAverage wind
Averages for 1991–2020. A rainy day is a day with at least 1 mm of rain.
And a month earlier or later?
| February | March | April | |
|---|---|---|---|
| Air, daytime high | 25° | 24° | 21° |
| Sea | 19° | 17° | 16° |
| Sunshine a day | 10.1 h | 9.0 h | 7.6 h |
| Rainy days | 6 | 6 | 7 |
Grotto Beach in April
- 21°CAir, daytime high14°C at night
- 16°CSea temperature
- 7.6 hSunshine a day
- 7 daysRainy days in the month43 mm in total
- 18 km/hAverage wind
Averages for 1991–2020. A rainy day is a day with at least 1 mm of rain.
And a month earlier or later?
| March | April | May | |
|---|---|---|---|
| Air, daytime high | 24° | 21° | 19° |
| Sea | 17° | 16° | 16° |
| Sunshine a day | 9.0 h | 7.6 h | 6.5 h |
| Rainy days | 6 | 7 | 8 |
Grotto Beach in May
- 19°CAir, daytime high12°C at night
- 16°CSea temperature
- 6.5 hSunshine a day
- 8 daysRainy days in the month41 mm in total
- 18 km/hAverage wind
Averages for 1991–2020. A rainy day is a day with at least 1 mm of rain.
And a month earlier or later?
| April | May | June | |
|---|---|---|---|
| Air, daytime high | 21° | 19° | 17° |
| Sea | 16° | 16° | 16° |
| Sunshine a day | 7.6 h | 6.5 h | 6.0 h |
| Rainy days | 7 | 8 | 10 |
Grotto Beach in June
- 17°CAir, daytime high10°C at night
- 16°CSea temperature
- 6.0 hSunshine a day
- 10 daysRainy days in the month65 mm in total
- 19 km/hAverage wind
Averages for 1991–2020. A rainy day is a day with at least 1 mm of rain.
And a month earlier or later?
| May | June | July | |
|---|---|---|---|
| Air, daytime high | 19° | 17° | 16° |
| Sea | 16° | 16° | 15° |
| Sunshine a day | 6.5 h | 6.0 h | 6.5 h |
| Rainy days | 8 | 10 | 10 |
Grotto Beach in July
- 16°CAir, daytime high10°C at night
- 15°CSea temperature
- 6.5 hSunshine a day
- 10 daysRainy days in the month65 mm in total
- 19 km/hAverage wind
Averages for 1991–2020. A rainy day is a day with at least 1 mm of rain.
And a month earlier or later?
| June | July | August | |
|---|---|---|---|
| Air, daytime high | 17° | 16° | 16° |
| Sea | 16° | 15° | 15° |
| Sunshine a day | 6.0 h | 6.5 h | 7.1 h |
| Rainy days | 10 | 10 | 11 |
Grotto Beach in August
- 16°CAir, daytime high10°C at night
- 15°CSea temperature
- 7.1 hSunshine a day
- 11 daysRainy days in the month65 mm in total
- 20 km/hAverage wind
Averages for 1991–2020. A rainy day is a day with at least 1 mm of rain.
And a month earlier or later?
| July | August | September | |
|---|---|---|---|
| Air, daytime high | 16° | 16° | 18° |
| Sea | 15° | 15° | 15° |
| Sunshine a day | 6.5 h | 7.1 h | 8.2 h |
| Rainy days | 10 | 11 | 8 |
Grotto Beach in September
- 18°CAir, daytime high11°C at night
- 15°CSea temperature
- 8.2 hSunshine a day
- 8 daysRainy days in the month39 mm in total
- 20 km/hAverage wind
Averages for 1991–2020. A rainy day is a day with at least 1 mm of rain.
And a month earlier or later?
| August | September | October | |
|---|---|---|---|
| Air, daytime high | 16° | 18° | 20° |
| Sea | 15° | 15° | 16° |
| Sunshine a day | 7.1 h | 8.2 h | 9.2 h |
| Rainy days | 11 | 8 | 8 |
Grotto Beach in October
- 20°CAir, daytime high12°C at night
- 16°CSea temperature
- 9.2 hSunshine a day
- 8 daysRainy days in the month45 mm in total
- 20 km/hAverage wind
Averages for 1991–2020. A rainy day is a day with at least 1 mm of rain.
And a month earlier or later?
| September | October | November | |
|---|---|---|---|
| Air, daytime high | 18° | 20° | 22° |
| Sea | 15° | 16° | 17° |
| Sunshine a day | 8.2 h | 9.2 h | 10.4 h |
| Rainy days | 8 | 8 | 7 |
Grotto Beach in November
- 22°CAir, daytime high14°C at night
- 17°CSea temperature
- 10.4 hSunshine a day
- 7 daysRainy days in the month49 mm in total
- 21 km/hAverage wind
Averages for 1991–2020. A rainy day is a day with at least 1 mm of rain.
And a month earlier or later?
| October | November | December | |
|---|---|---|---|
| Air, daytime high | 20° | 22° | 24° |
| Sea | 16° | 17° | 18° |
| Sunshine a day | 9.2 h | 10.4 h | 11.0 h |
| Rainy days | 8 | 7 | 5 |
Grotto Beach in December
- 24°CAir, daytime high16°C at night
- 18°CSea temperature
- 11.0 hSunshine a day
- 5 daysRainy days in the month27 mm in total
- 21 km/hAverage wind
Averages for 1991–2020. A rainy day is a day with at least 1 mm of rain.
And a month earlier or later?
| November | December | January | |
|---|---|---|---|
| Air, daytime high | 22° | 24° | 25° |
| Sea | 17° | 18° | 19° |
| Sunshine a day | 10.4 h | 11.0 h | 11.0 h |
| Rainy days | 7 | 5 | 5 |
Warmest sea of the year: January (19.1 °C) · most sunshine: January (11.0 h a day).
The beach itself
- 24Places to stay within 5 kmHotels, guest houses, apartments and campsites · OpenStreetMap
- 80 kmAirport: Cape Town International Airport (CPT)In a straight line; by road it is further Car hire at CPT airport (Cape Town)
No reliable information yet on: bathing water quality, wheelchair access, lifeguards.
Some links above are affiliate links: if you book through them we may earn a commission, at no extra cost to you. It never changes what the data on this page says.
January from 2020 to 2025
In January 2025 the sea averaged 20.8 °C — 1.7 °C above the 1991–2020 average.
1991–2020 average: 19.1 °C
1991–2020 average: 24.9 °C
Each bar is one year. Above the dashed line (the 1991–2020 average), that month was warmer than usual; below it, cooler.
February from 2020 to 2025
In February 2025 the sea averaged 17.7 °C — 0.9 °C below the 1991–2020 average.
1991–2020 average: 18.6 °C
1991–2020 average: 25.1 °C
Each bar is one year. Above the dashed line (the 1991–2020 average), that month was warmer than usual; below it, cooler.
March from 2020 to 2025
In March 2025 the sea averaged 15.5 °C — 1.9 °C below the 1991–2020 average.
1991–2020 average: 17.4 °C
1991–2020 average: 23.6 °C
Each bar is one year. Above the dashed line (the 1991–2020 average), that month was warmer than usual; below it, cooler.
April from 2020 to 2025
In April 2025 the sea averaged 14.5 °C — 1.6 °C below the 1991–2020 average.
1991–2020 average: 16.1 °C
1991–2020 average: 21.3 °C
Each bar is one year. Above the dashed line (the 1991–2020 average), that month was warmer than usual; below it, cooler.
May from 2020 to 2025
In May 2025 the sea averaged 15.2 °C — 0.7 °C below the 1991–2020 average.
1991–2020 average: 15.9 °C
1991–2020 average: 19.1 °C
Each bar is one year. Above the dashed line (the 1991–2020 average), that month was warmer than usual; below it, cooler.
June from 2020 to 2025
In June 2025 the sea averaged 15.4 °C — about the same as the 1991–2020 average.
1991–2020 average: 15.6 °C
1991–2020 average: 16.8 °C
Each bar is one year. Above the dashed line (the 1991–2020 average), that month was warmer than usual; below it, cooler.
July from 2020 to 2025
In July 2025 the sea averaged 15.3 °C — 0.4 °C above the 1991–2020 average.
1991–2020 average: 14.9 °C
1991–2020 average: 16.3 °C
Each bar is one year. Above the dashed line (the 1991–2020 average), that month was warmer than usual; below it, cooler.
August from 2020 to 2025
In August 2025 the sea averaged 15.1 °C — about the same as the 1991–2020 average.
1991–2020 average: 14.9 °C
1991–2020 average: 16.3 °C
Each bar is one year. Above the dashed line (the 1991–2020 average), that month was warmer than usual; below it, cooler.
September from 2020 to 2025
In September 2025 the sea averaged 16.0 °C — 0.7 °C above the 1991–2020 average.
1991–2020 average: 15.3 °C
1991–2020 average: 17.8 °C
Each bar is one year. Above the dashed line (the 1991–2020 average), that month was warmer than usual; below it, cooler.
October from 2020 to 2025
In October 2025 the sea averaged 16.2 °C — about the same as the 1991–2020 average.
1991–2020 average: 16.0 °C
1991–2020 average: 20.0 °C
Each bar is one year. Above the dashed line (the 1991–2020 average), that month was warmer than usual; below it, cooler.
November from 2020 to 2025
In November 2025 the sea averaged 16.6 °C — 0.7 °C below the 1991–2020 average.
1991–2020 average: 17.3 °C
1991–2020 average: 21.5 °C
Each bar is one year. Above the dashed line (the 1991–2020 average), that month was warmer than usual; below it, cooler.
December from 2020 to 2025
In December 2025 the sea averaged 16.4 °C — 2.1 °C below the 1991–2020 average.
1991–2020 average: 18.5 °C
1991–2020 average: 23.5 °C
Each bar is one year. Above the dashed line (the 1991–2020 average), that month was warmer than usual; below it, cooler.
When to go
1991–2020 averagesThe year at a glance
- Jan19°11 h28 mm
- Feb19°10 h22 mm
- Mar17°9 h36 mm
- Apr16°8 h43 mm
- May16°6 h41 mm
- Jun16°6 h65 mm
- Jul15°6 h65 mm
- Aug15°7 h65 mm
- Sep15°8 h39 mm
- Oct16°9 h45 mm
- Nov17°10 h49 mm
- Dec18°11 h27 mm
Each card is a month. The colour is the sea temperature, on the same scale as the map; in bold, the two best months for each.
Sea temperature
1991–2020 averagesClimate through the year
1991–2020 averagesRain
Sunshine
Sunshine hours are estimated from measured solar radiation, not observed directly.
Month by month
1991–2020 averagesEvery month at Grotto Beach: air, sea, rain and sunshine. Averages for 1991–2020.
| Month | High°C | Low°C | Sea°C | Rainmm | Rainy daysdays | Sunshineh/day | Windkm/h |
|---|---|---|---|---|---|---|---|
| Januarywarmest sea | 25 | 17 | 19 | 28 | 5 | 11.0 | 21 |
| February | 25 | 17 | 19 | 22 | 6 | 10.1 | 20 |
| March | 24 | 16 | 17 | 36 | 6 | 9.0 | 19 |
| April | 21 | 14 | 16 | 43 | 7 | 7.6 | 18 |
| May | 19 | 12 | 16 | 41 | 8 | 6.5 | 18 |
| June | 17 | 10 | 16 | 65 | 10 | 6.0 | 19 |
| July | 16 | 10 | 15 | 65 | 10 | 6.5 | 19 |
| August | 16 | 10 | 15 | 65 | 11 | 7.1 | 20 |
| September | 18 | 11 | 15 | 39 | 8 | 8.2 | 20 |
| October | 20 | 12 | 16 | 45 | 8 | 9.2 | 20 |
| November | 22 | 14 | 17 | 49 | 7 | 10.4 | 21 |
| December | 24 | 16 | 18 | 27 | 5 | 11.0 | 21 |
Swipe sideways to see the other columns.
Photos
Photos shared by their authors on Wikimedia Commons, with its colours adjusted.
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Plan your trip
Some links above are affiliate links: if you book through them we may earn a commission, at no extra cost to you. It never changes what the data on this page says.
About these numbers
Averages are for 1991–2020; the recent years (2020–2025) are what actually happened. Neither is today's weather.
| What | Where it comes from | Nearest measurement |
|---|---|---|
| Air, rain and sunshine | NASA POWER | 12 km away |
| Sea temperature | NOAA OISST v2.1, 1991–2020 | 9 km away |
| 2020–2025, month by month | NASA POWER · NOAA OISST v2.1 | 12 km away |
| Lifeguards and places to stay | OpenStreetMap | within 1–5 km |
| Nearest airport | OurAirports | straight-line distance |
| Image at the top | Sentinel-2 cloudless (EOX) | at this spot |