Climate - Mossel Bay (South Africa)

The climate of Mossel Bay (Afrikaans: Mosselbaai) is subtropical oceanic, with very mild winters and warm summers. The rains are not abundant, but they are well distributed throughout the year.
The city is located on the southern coast of South Africa, on the small peninsula of St. Blaize. We are in the Western Cape province, and about 340 km (210 mi) east of Cape Town.
Even though the climate is mild, sometimes the wind from the interior can bring very hot days, more often in spring and autumn. In the worst moments the temperature can reach 38 °C (100 °F). In the evening, however, the temperature returns cool with the wind from the sea.
Even though the winter is mild, there can be some cold and windy days. On the coldest nights of the year, the temperature can drop to around freezing. At other times, the warm wind from the northern mountains can blow in this season as well, so much so that the temperature can reach 28 °C (82 °F) even in winter.

The average temperature of the coldest month (August) is of 15.4 °C (59.7 °F), that of the warmest month (February) is of 21.5 °C (70.7 °F). Here are the average temperatures.
Precipitation amounts to 375 millimeters (14.8 inches) per year: it is therefore quite scarce. It ranges from 15 mm (0.6 in) in the driest month (May) to 55 mm (2.2 in) in the wettest one (November). Here is the average precipitation.
The sea temperature ranges from 17 °C (17 °F) in August to 22 °C (22 °F) in January, February. Here are the average sea temperatures.

Mossel Bay - Weather by month

Based on the period 1991-2020
(January - February - March - April - May - June - July - August - September - October - November - December)

In January, the average temperature is of 21.4 °C (71 °F), with a minimum of 18 °C (64.5 °F) and a maximum of 24.8 °C (76.6 °F).
On the coldest nights of the month, the temperature usually drops to around 14.5 °C (58.5 °F).
On the warmest days of the month, the temperature usually reaches around 28 °C (82.5 °F). However, in January 2017, it reached 32.6 °C (90.7 °F).
Precipitation amounts to 30 mm (1.2 in), distributed over 6 days.
The average humidity is 78%.
The average wind speed is 14 kph (9 kph).
The average sea temperature is of 22 °C (71 °F).

In February, the warmest month of the year, the average temperature is of 21.5 °C (71 °F), with a minimum of 17.9 °C (64.2 °F) and a maximum of 25 °C (77.1 °F).
On the coldest nights of the month, the temperature usually drops to around 14 °C (57 °F).
On the warmest days of the month, the temperature usually reaches around 30.5 °C (86.5 °F). However, in February 2014, it reached 35.3 °C (95.5 °F).
Precipitation amounts to 25 mm (1 in), distributed over 6 days.
The average humidity is 79%.
The average wind speed is 14 kph (9 kph).
The average sea temperature is of 22 °C (71 °F).

In March, the average temperature is of 20.6 °C (69 °F), with a minimum of 16.9 °C (62.5 °F) and a maximum of 24.2 °C (75.6 °F).
On the coldest nights of the month, the temperature usually drops to around 12.5 °C (54.5 °F).
On the warmest days of the month, the temperature usually reaches around 29 °C (84.5 °F). However, in March 2010, it reached 35.2 °C (95.4 °F).
Precipitation amounts to 20 mm (0.8 in), distributed over 6 days.
The average humidity is 80%.
The average wind speed is 13 kph (8 kph).
The average sea temperature is of 21 °C (70 °F).

In April, the average temperature is of 18.7 °C (66 °F), with a minimum of 14.5 °C (58.1 °F) and a maximum of 22.9 °C (73.3 °F).
On the coldest nights of the month, the temperature usually drops to around 10.5 °C (51 °F).
On the warmest days of the month, the temperature usually reaches around 32 °C (89 °F).
Precipitation amounts to 25 mm (1 in), distributed over 7 days.
The average humidity is 78%.
The average wind speed is 11 kph (7 kph).
The average sea temperature is of 19.5 °C (67.5 °F).

In May, the average temperature is of 17.8 °C (64 °F), with a minimum of 13.1 °C (55.5 °F) and a maximum of 22.6 °C (72.7 °F).
On the coldest nights of the month, the temperature usually drops to around 9 °C (48 °F).
On the warmest days of the month, the temperature usually reaches around 31 °C (87.5 °F). However, in May 2013, it reached 37.1 °C (98.8 °F).
Precipitation amounts to 15 mm (0.6 in), distributed over 5 days.
The average humidity is 74%.
The average wind speed is 11 kph (7 kph).
The average sea temperature is of 19 °C (66 °F).

In June, the average temperature is of 16.1 °C (61 °F), with a minimum of 11.2 °C (52.2 °F) and a maximum of 21 °C (69.7 °F).
On the coldest nights of the month, the temperature usually drops to around 7.5 °C (45.5 °F).
On the warmest days of the month, the temperature usually reaches around 28 °C (82.5 °F). However, in June 2016, it reached 32 °C (89.6 °F).
Precipitation amounts to 30 mm (1.2 in), distributed over 5 days.
The average humidity is 68%.
The average wind speed is 13 kph (8 kph).
The average sea temperature is of 18 °C (64.5 °F).

In July, the average temperature is of 15.7 °C (60 °F), with a minimum of 10.7 °C (51.3 °F) and a maximum of 20.7 °C (69.3 °F).
On the coldest nights of the month, the temperature usually drops to around 7 °C (44.5 °F).
On the warmest days of the month, the temperature usually reaches around 28 °C (82.5 °F). However, in July 2017, it reached 31.2 °C (88.2 °F).
Precipitation amounts to 40 mm (1.6 in), distributed over 6 days.
The average humidity is 68%.
The average wind speed is 13 kph (8 kph).
The average sea temperature is of 17.5 °C (63 °F).

In August, the coldest month of the year, the average temperature is of 15.4 °C (60 °F), with a minimum of 10.6 °C (51.1 °F) and a maximum of 20.1 °C (68.2 °F).
On the coldest nights of the month, the temperature usually drops to around 6.5 °C (44 °F).
On the warmest days of the month, the temperature usually reaches around 28.5 °C (83.5 °F). However, in August 2000, it reached 39 °C (102.2 °F).
Precipitation amounts to 40 mm (1.6 in), distributed over 6 days.
The average humidity is 71%.
The average wind speed is 13 kph (8 kph).
The average sea temperature is of 17 °C (63 °F).

In September, the average temperature is of 16.1 °C (61 °F), with a minimum of 11.8 °C (53.2 °F) and a maximum of 20.5 °C (68.8 °F).
On the coldest nights of the month, the temperature usually drops to around 8 °C (46.5 °F).
On the warmest days of the month, the temperature usually reaches around 28.5 °C (83.5 °F). However, in September 2019, it reached 37.9 °C (100.2 °F).
Precipitation amounts to 35 mm (1.4 in), distributed over 6 days.
The average humidity is 74%.
The average wind speed is 14 kph (8 kph).
The average sea temperature is of 17.5 °C (63.5 °F).

In October, the average temperature is of 17.3 °C (63 °F), with a minimum of 13.6 °C (56.4 °F) and a maximum of 21.1 °C (70 °F).
On the coldest nights of the month, the temperature usually drops to around 9.5 °C (48.5 °F).
On the warmest days of the month, the temperature usually reaches around 29 °C (84.5 °F). However, in October 2018, it reached 39 °C (102.2 °F).
Precipitation amounts to 40 mm (1.6 in), distributed over 8 days.
The average humidity is 76%.
The average wind speed is 15 kph (9 kph).
The average sea temperature is of 18 °C (64.5 °F).

In November, the average temperature is of 18.5 °C (65 °F), with a minimum of 14.8 °C (58.6 °F) and a maximum of 22.2 °C (71.9 °F).
On the coldest nights of the month, the temperature usually drops to around 11 °C (51.5 °F).
On the warmest days of the month, the temperature usually reaches around 27.5 °C (81.5 °F). However, in November 2015, it reached 34.4 °C (93.9 °F).
Precipitation amounts to 55 mm (2.2 in), distributed over 7 days.
The average humidity is 76%.
The average wind speed is 15 kph (9 kph).
The average sea temperature is of 19 °C (66.5 °F).

In December, the average temperature is of 20.3 °C (69 °F), with a minimum of 16.7 °C (62 °F) and a maximum of 23.9 °C (75 °F).
On the coldest nights of the month, the temperature usually drops to around 12 °C (53.5 °F).
On the warmest days of the month, the temperature usually reaches around 29 °C (84 °F). However, in December 2017, it reached 34.3 °C (93.7 °F).
Precipitation amounts to 20 mm (0.8 in), distributed over 6 days.
The average humidity is 77%.
The average wind speed is 14 kph (9 kph).
The average sea temperature is of 20.5 °C (69 °F).