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Local Weather

Tristan Da Cunha Climate History

Past weather including monthly averages for Tristan Da Cunha

Tristan Da Cunha

Country Overview For Tristan Da Cunha

The climate in Tristan da Cunha is typically Temperate marine; mild, tempered by trade winds (tends to be cooler than Saint Helena). For TRISTAN DA CUNHA in January the daily average maximum temperatures is 23°C with the average minimum 15°C, while in June the average maximum is 17°C with a minimum of 11°C. The wettest month for TRISTAN DA CUNHA is June with an average of 2.7mm of precipitation falling while the driest month is January with 0.0mm falling.



The information presented below gives detailed historical monthly average weather conditions along with exceptional weather occurrences. To maintain relevance to current weather trends the displayed information has been calculated using data collected over the past two decades. The climate profile is taken from closest available data source to Tristan Da Cunha.


Throughout the month of October daytime temperatures will generally reach highs of around 19°C that's about 66°F. At night the average minimum temperature drops down to around 12°C, that's 53°F.

In recent times the highest recorded temperature in October has been 31°C that's 88°F, with the lowest recorded temperature -3°C, about 27°F.

Relative Humidity

The average daily relative humidity for October is around 52%.

Heat Index

The Heat Index is a measure of how hot it feels when relative humidity is added to actual air temperature. From this a comfort level is calculated providing categories on how heat conditions might adversely affect someone.

Comfort Levels: Given average maximum temperatures and humidity levels generally you should not anticipate any discomfort from heat (see heat index for more information).


The average monthly amount of precipitation has been recorded at around 30 mm, that's 1 inches.

Estimated Hours of Sunshine per Day

We calculate sunshine hours per day using our past forecast data. For October expect the sun to shine for an average of 6 hours per day. This represents the average number of hours in the daytime that the sun is visible and not obscured by cloud e.g. the average number of hours the sun is actually out and shining. Note we calculate hours of sunshine per day using our past forecast data, not observation data, thus it is an estimate and not actual.


The average daily wind speed in October has been around 4 km/h, that’s the equivalent to about 2 mph, or 2 knots. In recent years the maximum sustained wind speed has reached 89 km/h, that’s the equivalent of around 55 mph, or 48 knots.


The temperature of water an individual will feel comfortable in is very much personal preference. What feels unbearably cold to one person for a swim might be fine for another. We have created our own Swimming Water Temperature Index offering a guide to water temperature and comfort levels for swimming;

In October, for the nearest coastal location, the temperature of the sea averages around 12°C, that's 54° Fahrenheit. Our index indicates for swimming this is considered cold and even the most hardy among us would find any more than a few minutes in the water uncomfortable.



The following charts show yearly weather trends with information on monthly weather averages and extremes.


The chart below plots the average high and low temperature for each month of the year. It also shows the maximum and minimum recorded temperatures.

Precipitation Amount

The chart below plots the average monthly precipitation amount.

Wind Speed

The chart below plots the average daily wind speed you can expect for any month. It also shows the maximum recorded sustained wind speed for each month.