Monthly Climate
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Best time to visit Bitung

August is the best time to visit Bitung for general sightseeing, with average highs of 29 °C and about 14 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 August comfort 57/100
A beach holiday August sea 28 °C
The least cloud August 65 % average cloud cover
The least rain August 138 mm
Warmth October 30 °C
Cooler weather July 28 °C

Ranked by comfort

# Month Comfort / 100 Avg high Wet days Beach
1 August 57 29 °C 14 73
2 September 52 29 °C 17 70
3 July 50 28 °C 20 71
4 February 48 29 °C 24 70
5 January 48 29 °C 28 70
6 June 48 29 °C 25 70
7 March 47 29 °C 26 69
8 December 47 29 °C 29 68
9 April 46 29 °C 27 67
10 October 46 30 °C 23 68
11 November 46 30 °C 28 67
12 May 46 29 °C 28 67

For a beach holiday

August scores highest, with a sea temperature of 28 °C and air temperatures around 29 °C. The sea never reaches 20 °C here.

Month Sea Air Sunshine Beach score
January 29 °C 29 °C 86 % 70
February 29 °C 29 °C 84 % 70
March 29 °C 29 °C 80 % 69
April 29 °C 29 °C 78 % 67
May 29 °C 29 °C 75 % 67
June 29 °C 29 °C 75 % 70
July 28 °C 28 °C 71 % 71
August 28 °C 29 °C 65 % 73
September 28 °C 29 °C 67 % 70
October 29 °C 30 °C 74 % 68
November 29 °C 30 °C 82 % 67
December 29 °C 29 °C 86 % 68

When to think twice

May scores lowest with about 28 wet days and highs near 29 °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 28.8 °C 249 mm 86 %
February 28.9 °C 231 mm 84 %
March 29.2 °C 230 mm 80 %
April 29.5 °C 280 mm 78 %
May 29.3 °C 326 mm 75 %
June 28.8 °C 303 mm 75 %
July 28.4 °C 216 mm 71 %
August 28.8 °C 138 mm 65 %
September 29.5 °C 141 mm 67 %
October 29.8 °C 239 mm 74 %
November 29.6 °C 272 mm 82 %
December 29.2 °C 270 mm 86 %

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.