All data are in degrees Fahrenheit

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Water temperature in Hermanus

Detailed information about the current water temperature in Hermanus. The trend over the last two weeks, daily averages, and precise forecast of the water temperature changes. Gain a deeper understanding of seasonal dynamics with monthly statistical analyses covering recent years.
Sea temperature in Hermanus now

58.5

°F

August 2, 09:41

Trend:

stable

Yesterday:

58.6°F

Tomorrow:

58.6°F

Sunrise:

07:36

Sunset:

18:03

Day Length:

10 h. 27 min.

Hermanus in August

Minimum:

59.1°F

Average:

65.2°F

Maximum:

69.6°F

Sea water temperature in Hermanus today

As of now, in Hermanus, the water temperature is 58.5°F. Swimming in water of this temperature is considered as extremely cold, and there's a substantial risk of hypothermia if exposed for more than a brief duration. Today's reading is 0.5°F higher than the average recorded on this particular day in recent years. The sea temperature remains approximately unchanged from yesterday. According to the forecast, we expect the temperature to stay about the same.

Recent sea temperature and forecast

Today's water temperature is slightly lower than the average registered over the last two weeks, indicating a slight cooling trend. It also falls within the range of the average temperature recorded for this date, suggesting a consistent weather trend. The maximum temperature recorded for this date was 60.5°F on 2020, while the historical minimum was 56.2°F on 2015.

Over the past two weeks, the water temperature has closely aligned with historical averages for those days. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 58.8°F. Both minimum and maximum temperatures expected to be close to the average, offering a week of stable water conditions.

Daily water temperature in Hermanus

Date Current Year

actual* / forecast**

last year 10 years average
Jul 19 58.6°F 57.4°F 58.9°F
Jul 20 58.0°F 57.7°F 58.6°F
Jul 21 58.2°F 57.3°F 58.6°F
Jul 22 58.6°F 56.8°F 58.5°F
Jul 23 58.4°F 56.6°F 58.6°F
Jul 24 58.0°F 57.6°F 58.5°F
Jul 25 58.3°F 56.4°F 58.3°F
Jul 26 58.2°F 57.3°F 58.4°F
Jul 27 58.9°F 57.7°F 58.5°F
Jul 28 59.2°F 57.6°F 58.4°F
Jul 29 59.7°F 56.9°F 58.5°F
Jul 30 60.0°F 57.0°F 58.6°F
Jul 31 59.6°F 56.4°F 58.3°F
Aug 1 58.6°F 56.7°F 58.1°F
Aug 2 58.5°F 56.7°F 58.0°F
Aug 3 58.6°F 56.6°F 58.1°F
Aug 4 58.7°F 56.6°F 58.2°F
Aug 5 58.8°F 57.0°F 58.2°F
Aug 6 58.9°F 57.4°F 58.4°F
Aug 7 58.8°F 57.2°F 58.3°F
Aug 8 58.9°F 57.5°F 58.4°F
Aug 9 59.0°F 58.2°F 58.5°F

* actual - actual temperature values

** forecast - projected values for the next week

Real-time coastal temperatures could deviate by several degrees from the provided readings. These deviations often become evident following intense rainfall or strong winds.

Our forecasting methodology leverages a mathematical model, that uses current water and weather conditions, historical records, wind intensity and direction.

Sea water temperature in Hermanus by month

In an average year, Hermanus offers no days when the water temperature is warm enough to swim comfortably.
The warmest water in Hermanus was recorded on January 12, 2025, reaching a 70.8°F. While the coldest temperature occurred on April 15, 2024, dipping to 51.4°F. The average readings by season are 65.1°F in Winter, 60.8°F in Spring, 59.1°F in Summer, and 60.7°F in Autumn.