May Weather in Swansea, Australia

Last updated: August 22, 2025

In May, the average temperature in Swansea, Australia is a mild 10°C (51°F). Travelers can expect a range from a chilly 1°C (35°F) to a warmer 22°C (71°F). Rain may make an appearance, with precipitation amounting to 45 mm (1.8 in) over about 6 days. Additionally, the climate feels quite humid, with an average humidity of 80%.

May Temperature in Swansea

In May in Swansea, the average temperature is 10°C (51°F). Maximums can reach 22°C (71°F) and minimums can be as low as 1°C (35°F). This makes it a comfortable time for travelers to enjoy outdoor activities while being prepared for cooler evenings.

May Weather in Swansea: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Swansea, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Swansea, May typically has an average temperature of 10°C (51°F), with highs reaching up to 22°C (71°F) and lows dropping to around 1°C (35°F).

Data source: Temperature data for Swansea generated using information from the Copernicus Climate Change Service.

May Precipitation in Swansea

In Swansea in May, the precipitation amount is 45 mm (1.8 in) over the course of 6 days.

May Precipitation Trends in Swansea

The chart displays monthly precipitation patterns in Swansea, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In Swansea, May typically receives around 45 mm (1.8 inches) of precipitation spread over approximately 6 days.

Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

May Humidity in Swansea

In Swansea in May, humidity is 80%. With an average temperature of 10°C (51°F), this humidity feels like a damp layer clinging to the skin, making outdoor activities uncomfortable and requiring travelers to dress in layers to cope with the chill and moisture in the air.

May Average Humidity in Swansea

This chart illustrates the average monthly humidity levels in Swansea, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in Swansea is approximately 80%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Swansea

In Swansea in May, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Swansea, you can check the information here.

Maximum UV Index Levels in Swansea for May

The chart shows the monthly maximum UV Index (UVI) for Swansea in May, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In May, the maximum UV index in Swansea typically reaches 3, which falls under the moderate exposure category.

Data source: Swansea May UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How May Weather in Swansea Compares to Other Months

Weather in Swansea varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Swansea, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Swansea, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	17°C (63°F)	60 mm (2.4 inches)	76%	extreme
February Weather	16°C (60°F)	59 mm (2.3 inches)	73%	extreme
March Weather	15°C (60°F)	66 mm (2.6 inches)	77%	very high
April Weather	12°C (55°F)	37 mm (1.5 inches)	78%	high
May Weather	10°C (51°F)	45 mm (1.8 inches)	80%	moderate
June Weather	8°C (47°F)	54 mm (2.1 inches)	79%	low
July Weather	7°C (46°F)	25 mm (1.0 inches)	80%	low
August Weather	8°C (46°F)	48 mm (1.9 inches)	79%	moderate
September Weather	9°C (49°F)	44 mm (1.7 inches)	77%	high
October Weather	11°C (53°F)	88 mm (3.4 inches)	75%	very high
November Weather	14°C (57°F)	67 mm (2.7 inches)	76%	very high
December Weather	15°C (60°F)	72 mm (2.8 inches)	76%	extreme