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Monthly climate in Swansea, Australia

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Swansea features a oceanic climate (Cfb). Temperatures typically range between 7 °C (46 °F) and 17 °C (63 °F) through the year, but rarely can drop to -2 °C (30 °F) or can rise to as high as 36 °C (97 °F). The average annual precipitation amounts to about 663 mm (26.1 inches) and receives 99 rainy days on the 1 mm (0.04 inches) threshold annually. Swansea enjoys an average of 3169 hours of sunshine throughout the year, and daylight varies from 9 hours 8 minutes to 15 hours 10 minutes per day.

Monthly average temperatures in Swansea, Australia

The warmest months in Swansea are January, February and March, with daily mean temperatures ranging from 15 to 17 °C (60 - 63 °F) throughout the day. The coldest temperatures usually occur in June, July and August, when daily mean temperatures range from 7 to 8 °C (46 - 47 °F) throughout the day. On average each year, Swansea experiences 20 days above 25 °C (77.0 °F) and 2 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Swansea. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum34°C
(93°F)		36°C
(97°F)		33°C
(92°F)		26°C
(80°F)		22°C
(71°F)		17°C
(63°F)		15°C
(59°F)		17°C
(63°F)		23°C
(73°F)		27°C
(81°F)		31°C
(88°F)		35°C
(96°F)
Mean maximum32°C
(90°F)		29°C
(84°F)		27°C
(80°F)		23°C
(74°F)		19°C
(67°F)		14°C
(58°F)		14°C
(58°F)		16°C
(61°F)		20°C
(68°F)		23°C
(74°F)		27°C
(81°F)		30°C
(87°F)
Average high23°C
(73°F)		21°C
(69°F)		20°C
(68°F)		17°C
(63°F)		14°C
(58°F)		12°C
(54°F)		11°C
(53°F)		12°C
(54°F)		14°C
(58°F)		16°C
(61°F)		19°C
(66°F)		20°C
(69°F)
Daily mean17°C
(63°F)		16°C
(60°F)		15°C
(60°F)		12°C
(55°F)		10°C
(51°F)		8°C
(47°F)		7°C
(46°F)		8°C
(46°F)		9°C
(49°F)		11°C
(53°F)		14°C
(57°F)		15°C
(60°F)
Average low12°C
(54°F)		11°C
(52°F)		11°C
(52°F)		8°C
(47°F)		7°C
(44°F)		5°C
(41°F)		4°C
(40°F)		4°C
(40°F)		5°C
(42°F)		7°C
(45°F)		9°C
(48°F)		10°C
(51°F)
Mean minimum7°C
(45°F)		6°C
(43°F)		6°C
(43°F)		3°C
(38°F)		2°C
(36°F)		1°C
(34°F)		-0°C
(32°F)		-1°C
(31°F)		1°C
(33°F)		2°C
(36°F)		3°C
(38°F)		6°C
(43°F)
Minimum5°C
(41°F)		5°C
(41°F)		3°C
(38°F)		2°C
(35°F)		1°C
(35°F)		-1°C
(30°F)		-1°C
(30°F)		-2°C
(30°F)		-0°C
(32°F)		1°C
(33°F)		2°C
(37°F)		5°C
(41°F)

Compare climate in Swansea with other places

Compare temperature, precipitation, sunshine, UV index in Swansea, Australia with other places around the world.

Monthly average precipitation in Swansea, Australia

Swansea usually has the most precipitation in October, November and December, with an average of 11 rainy days and 76 mm (3.0 inches) of precipitation per month. The driest months in Swansea are April, July and September. On average, 35 mm (1.4 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Swansea. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)60 (2.4)59 (2.3)66 (2.6)37 (1.5)45 (1.8)54 (2.1)25 (1.0)48 (1.9)44 (1.7)88 (3.4)67 (2.7)72 (2.8)
Average precipitation days (≥ 1 mm)699567798121110

Monthly sunshine hours in Swansea, Australia

The sunniest months in Swansea are January, November and December, when the sun shines an average of 10 hours 24 minutes a day. Least sunny months in Swansea: May, June and July receive an average of 6 hours 40 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Swansea. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours289284275246210188215233267288317349
Mean daily daylight hours14h 50m13h 43m12h 19m10h 54m9h 43m9h 8m9h 26m10h 27m11h 48m13h 13m14h 30m15h 10m

Solar UV radiation in Swansea, Australia

Swansea experiences the highest level of ultraviolet (UV) radiation in January, February and December, when the maximum UV index can reach values of 11 - 13, which corresponds to the Extreme category of sun exposure. May, June and July are in the Low / Moderate exposure category. In these months, the maximum values of the UV index do not exceed 3. For more detailed information, check out our hourly Swansea UV Index data.

Average daily maximum UV levels by month for Swansea. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)13111063224681013