Monthly Climate
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Best time to visit Port Moresby

July is the best time to visit Port Moresby for general sightseeing, with average highs of 29 °C and about 5 wet days. The comfortable season runs roughly June to September.

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 July comfort 71/100
A beach holiday July sea 26 °C
The least cloud August 65 % average cloud cover
The least rain July 31 mm
Warmth November 31 °C
Cooler weather July 29 °C

Ranked by comfort

# Month Comfort / 100 Avg high Wet days Beach
1 July 71 29 °C 5 95
2 August 69 29 °C 6 92
3 June 65 29 °C 8 87
4 September 64 30 °C 7 87
5 May 60 29 °C 12 79
6 October 59 31 °C 10 80
7 November 53 31 °C 14 69
8 April 49 29 °C 20 69
9 March 49 29 °C 24 67
10 February 47 30 °C 21 65
11 January 47 30 °C 22 65
12 December 46 31 °C 21 65

For a beach holiday

July scores highest, with a sea temperature of 26 °C and air temperatures around 29 °C. The sea never reaches 20 °C here.

Month Sea Air Sunshine Beach score
January 29 °C 30 °C 88 % 65
February 29 °C 30 °C 89 % 65
March 29 °C 29 °C 90 % 67
April 29 °C 29 °C 83 % 69
May 28 °C 29 °C 72 % 79
June 27 °C 29 °C 69 % 87
July 26 °C 29 °C 66 % 95
August 25 °C 29 °C 65 % 92
September 25 °C 30 °C 68 % 87
October 26 °C 31 °C 69 % 80
November 27 °C 31 °C 73 % 69
December 29 °C 31 °C 81 % 65

When to think twice

December scores lowest with about 21 wet days and highs near 31 °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 30.3 °C 234 mm 88 %
February 30.1 °C 201 mm 89 %
March 29.5 °C 282 mm 90 %
April 29.4 °C 180 mm 83 %
May 29.3 °C 81 mm 72 %
June 29.0 °C 50 mm 69 %
July 28.6 °C 31 mm 66 %
August 29.1 °C 34 mm 65 %
September 30.1 °C 45 mm 68 %
October 30.8 °C 61 mm 69 %
November 31.0 °C 106 mm 73 %
December 30.7 °C 170 mm 81 %

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.