August weather forecast
Guernsey

August in Guernsey extends the summer warmth, with temperatures comparable to those experienced in July. Average temperatures continue to range from 17°C (62.6°F) to 20°C (68°F), maintaining the pleasant conditions for outdoor activities and beach visits.

When it comes to rainfall, August sees a slight increase compared to the previous summer months. The island typically experiences around 40mm (1.57") of rain, distributed over about 10 to 12 days of the month. Despite this increase, the climate remains largely dry and sunny, ensuring a comfortable continuation of the summer season.

Compared to July, August's weather conditions are very similar in terms of temperature, with only a modest increase in precipitation. Transitioning into September, temperatures begin to decrease gradually, indicating the onset of the autumn season. At the same time, the rainfall levels tend to rise, marking the end of the summer and the beginning of the slightly cooler and wetter autumn months.

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• Saint Sampson - August »
  August is Saint Sampson's warmest month, registering average high temperatures of 17.8°C (64°F) and lows of 15.8°C (60.4°F). The warmest period in Saint Sampson tends to be August, when average temperatures fluctuate between a high of 17.8°C (64°F) and a low of 15.8°C (60.4°F).
• Guernsey - August »
  Guernsey's August weather, marked by an average high temperature of 17.8°C (64°F) and an average low temperature of 15.8°C (60.4°F), is the warmest in the year. Guernsey witnesses the warmest weather in August, with temperatures averaging a high of 17.8°C (64°F) and a low of 15.8°C (60.4°F).
• Saint Peter Port - August »
  August is the month with the warmest seawater in Saint Peter Port, with an average sea temperature of 17°C (62.6°F). August is the month with the warmest seawater in Saint Peter Port, with an average sea temperature of 17°C (62.6°F).
• Alderney - August »
  On the last day of August, in Alderney, sunrise is at 06:22 and sunset at 19:55 BST. In August, the average sea temperature in Alderney is 17.2°C (63°F).
• Braye du Valle - August »
  Braye du Valle's August weather reaches an average high of 17.8°C (64°F) and an average low of 15.8°C (60.4°F), making it the warmest month. On the last day of August, in Braye du Valle, sunrise is at 06:24 and sunset at 19:56 BST.
• Fort George - August »
  August is Fort George's warmest month, registering average high temperatures of 17.8°C (64°F) and lows of 15.8°C (60.4°F). On the first day of August in Fort George, sunrise is at 05:41 and sunset at 20:51.
• Saint Andrew - August »
  In Saint Andrew, during August, the rain falls for 14 days and regularly aggregates up to 41mm (1.61") of precipitation. On the last day of August, in Saint Andrew, sunrise is at 06:24 and sunset at 19:56 BST.