Monthly Climate
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Best time to visit Adamstown

September is the best time to visit Adamstown for general sightseeing, with average highs of 21 °C and about 9 wet days. The comfortable season runs roughly May to December.

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 79/100
A beach holiday March sea 27 °C
The least cloud March 55 % average cloud cover
The least rain July 104 mm
Warmth March 25 °C
Cooler weather September 21 °C

Ranked by comfort

# Month Comfort / 100 Avg high Wet days Beach
1 September 79 21 °C 9 66
2 August 77 21 °C 10 64
3 July 77 21 °C 11 66
4 November 77 23 °C 10 73
5 October 76 22 °C 11 65
6 June 76 22 °C 10 71
7 May 75 23 °C 10 75
8 December 70 24 °C 13 73
9 April 68 24 °C 13 75
10 January 68 25 °C 13 76
11 March 67 25 °C 12 78
12 February 66 25 °C 13 77

For a beach holiday

March scores highest, with a sea temperature of 27 °C and air temperatures around 25 °C. The sea never reaches 20 °C here.

Month Sea Air Sunshine Beach score
January 26 °C 25 °C 59 % 76
February 27 °C 25 °C 57 % 77
March 27 °C 25 °C 55 % 78
April 26 °C 24 °C 63 % 75
May 25 °C 23 °C 65 % 75
June 24 °C 22 °C 66 % 71
July 23 °C 21 °C 62 % 66
August 22 °C 21 °C 61 % 64
September 22 °C 21 °C 66 % 66
October 23 °C 22 °C 69 % 65
November 24 °C 23 °C 69 % 73
December 25 °C 24 °C 68 % 73

When to think twice

February scores lowest with about 13 wet days and highs near 25 °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 24.9 °C 119 mm 59 %
February 25.3 °C 110 mm 57 %
March 25.4 °C 111 mm 55 %
April 24.5 °C 130 mm 63 %
May 23.2 °C 111 mm 65 %
June 22.2 °C 122 mm 66 %
July 21.3 °C 104 mm 62 %
August 21.0 °C 112 mm 61 %
September 21.0 °C 110 mm 66 %
October 21.5 °C 128 mm 69 %
November 22.6 °C 110 mm 69 %
December 23.8 °C 155 mm 68 %

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.