Hermanus — Water Temperature, Sea Conditions & Trends
This page provides clear and up-to-date information about water temperature for Hermanus (South Africa). It includes the current water temperature, daily data for the last month presented in a simple chart, and a 7-day forecast. The page also compares today’s value with typical averages for this period, shows usual monthly ranges during the year, and lists nearby beaches with short descriptions. Local weather for the next few days and general details about Hermanus help you plan your visit and choose the best time for swimming.
Current Water Temperature
Water temperature in Hermanus in the Indian Ocean today is 15°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
⚠️ As of today, the minimum water temperature ranges from 54°F (12°C) to 60°F (15°C). The water is significantly warmer, and swimming becomes possible for most people. However, caution may still be required for prolonged stays in the water, as extended exposure can cause discomfort. This is a suitable temperature range for short swims and for those accustomed to cooler water. For more comfortable swimming, it is recommended to use proper gear.
It is important to note that these swimming tips and recommendations apply only in good weather. When the air temperature is below 68°F (20°C), and sometimes even below 77°F (25°C), swimming can be unpleasant even with relatively high water temperatures.
Water Temperature Chart Over the Last 30 Days
Water temperature in Hermanus today is lower than both a week ago and a month ago. Currently, the sea water temperature at this location matches the average for this day in previous years.
According to our forecast, Water temperature in Hermanus will be 15.9°C in the next 7 days. See the table below for daily data for the upcoming week.
Table of Daily Sea Temperature Data
| Date | Current | Average | Forecast |
|---|---|---|---|
| JUN 28 | 15.5°C | 16.0°C | |
| JUN 29 | 15.5°C | 16.0°C | |
| JUN 30 | 15.4°C | 15.8°C | |
| JUL 1 | 15.2°C | 15.8°C | |
| JUL 2 | 15.2°C | 15.8°C | |
| JUL 3 | 15.0°C | 15.0°C | |
| JUL 4 | 15.0°C | 15.5°C | |
| JUL 5 | 15.2°C | 15.8°C | |
| JUL 6 | 14.9°C | 15.8°C | 14.9°C |
| JUL 7 | 16.3°C | 15.0°C | |
| JUL 8 | 16.5°C | 15.2°C | |
| JUL 9 | 15.8°C | 15.3°C | |
| JUL 10 | 16.5°C | 15.5°C | |
| JUL 11 | 16.0°C | 15.6°C | |
| JUL 12 | 16.3°C | 15.7°C | |
| JUL 13 | 16.3°C | 15.9°C |
* Current - Actual water temperature value
** Average - Average water temperature on this day in recent years
*** Forecast - Our water temperature forecast
Actual nearshore water temperatures may fluctuate by several degrees from the reported values, especially following heavy rainfall or extended periods of strong winds. Certain wind patterns can cause colder, deeper waters to rise and replace the sun-warmed surface water, leading to noticeable variations.
Our forecast is based on a proprietary mathematical model that considers real-time water temperature changes, historical trends, key weather patterns, wind strength and direction, and air temperature specific to each region. Additionally, we incorporate data from other resorts to enhance accuracy.
Water temperature data for this location is gathered from various sources, including buoys and satellite sea and ocean surface maps provided by the NOAA agency. We also incorporate data from local authorities in each specific location worldwide to ensure more accurate temperature readings.
Annual Water Temperature Overview by Month
Monthly Water Temp Ranges
Annual Water Temperature Trend
Hermanus, on the southern coast of South Africa’s Western Cape, sits where the cold Benguela current influences sea conditions, producing generally cool seawater year-round. Seasonal water temperatures typically range from around 12°C in the coldest winter months to roughly 19°C at the warmest in late summer. Spring and autumn are transitional, with temperatures commonly between about 13°C and 18°C. Local variability occurs with wind, upwelling and weather systems, so short-term changes of a degree or two are normal. The water is noticeably colder than many subtropical beach destinations, which shapes how visitors use the shoreline.
Monthly Water Temperature Range (Min, Max & Average)
| Month | Min | Avg | Max |
|---|---|---|---|
| January | 16°C | 21°C | 23°C |
| February | 17°C | 21°C | 23°C |
| March | 15°C | 19°C | 23°C |
| April | 13°C | 17°C | 20°C |
| May | 13°C | 17°C | 19°C |
| June | 14°C | 17°C | 19°C |
| July | 13°C | 16°C | 18°C |
| August | 13°C | 15°C | 18°C |
| September | 13°C | 16°C | 17°C |
| October | 14°C | 16°C | 18°C |
| November | 14°C | 17°C | 20°C |
| December | 16°C | 19°C | 22°C |
* Click on a month to view detailed water temperature data.
Hermanus: Weather Forecast
July 7
July 8
July 9
Location, Beaches & Local Information
Nearby Beaches & Facilities
Hermanus Tidal Pool
Kwaaiwater
Langbaai Beach
Skulpiesbaai
Voelklip Beach
Rowweklip Beach
Grotto Beach
Klein River Lagoon
Sandbaai Beach
Swimming Conditions
Swimming and beach holidays in Hermanus are best planned with the cooler water in mind. Summer offers the most comfortable conditions for bathing and paddling, and sheltered bays and longer, sandy beaches make wading and short swims accessible without specialized gear for some people; however, many swimmers prefer a wetsuit for longer exposure. There are tidal pools and calmer coves that are more forgiving than exposed surf beaches, while stronger currents and swell can affect the open coast and are better suited to experienced surfers and bodyboarders. Beyond swimming, the coastline is excellent for shoreline walks, sightseeing and whale watching during the season, so a beach visit often combines water contact with other outdoor activities.