Monthly Climate
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Best time to visit Wollongong

September is the best time to visit Wollongong for general sightseeing, with average highs of 19 °C and about 6 wet days. The comfortable season runs roughly August to May. The sea stays above 20 °C from December to May.

It depends what you are going for

One month rarely wins on everything. These are the best months on each measure taken on its own.

If you want Best month On that measure
Sightseeing and walking September comfort 88/100
A beach holiday January sea 23 °C
The least cloud August 33 % average cloud cover
The least rain July 50 mm
Warmth January 25 °C
Cooler weather July 16 °C

Ranked by comfort

# Month Comfort / 100 Avg high Wet days Beach
1 September 88 19 °C 6 50
2 October 88 21 °C 9 55
3 April 86 21 °C 10 64
4 November 85 22 °C 10 60
5 May 84 18 °C 9 54
6 December 83 24 °C 10 71
7 August 81 17 °C 6 42
8 March 81 23 °C 12 70
9 January 79 25 °C 10 80
10 February 79 24 °C 11 77
11 July 77 16 °C 7 40
12 June 75 16 °C 9 40

For a beach holiday

January scores highest, with a sea temperature of 23 °C and air temperatures around 25 °C. The sea is above 20 °C from December to May.

Month Sea Air Sunshine Beach score
January 23 °C 25 °C 56 % 80
February 23 °C 24 °C 57 % 77
March 23 °C 23 °C 52 % 70
April 22 °C 21 °C 46 % 64
May 21 °C 18 °C 43 % 54
June 20 °C 16 °C 44 % 40
July 19 °C 16 °C 36 % 40
August 18 °C 17 °C 33 % 42
September 18 °C 19 °C 38 % 50
October 19 °C 21 °C 49 % 55
November 20 °C 22 °C 57 % 60
December 21 °C 24 °C 56 % 71

When to think twice

June scores lowest with about 9 wet days and highs near 16 °C. That does not make it a bad month — it depends entirely on what you are travelling for. The numbers are all here; the judgement is yours.

The full year

Month Avg high Rainfall Cloud
January 25.1 °C 83 mm 56 %
February 24.5 °C 110 mm 57 %
March 23.1 °C 95 mm 52 %
April 21.0 °C 74 mm 46 %
May 18.4 °C 73 mm 43 %
June 16.1 °C 90 mm 44 %
July 15.6 °C 50 mm 36 %
August 16.7 °C 51 mm 33 %
September 18.9 °C 50 mm 38 %
October 20.9 °C 64 mm 49 %
November 22.3 °C 77 mm 57 %
December 23.9 °C 64 mm 56 %

Data sources and method

Normal period
1991–2020
Dataset version
era5-1991-2020-scores1.1
Last processed

Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: comfort score, beach score, season boundaries. Full formulas are on the methodology page.

Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.