17 August 2026 – Southwest Monsoon conditions are prevailing over Singapore and the surrounding region, and are expected to persist in the coming fortnight, with winds blowing from the southeast or southwest.

2            Localised short-duration thundery showers are expected over parts of the island during the late morning and afternoon on some days. There may also be several fair and occasionally windy days. The total rainfall for the second fortnight of August 2026 is forecast to be below average over most parts of the island.

3            In the second fortnight of August 2026, the daily maximum temperatures are likely to range between 33 degrees Celsius and 34 degrees Celsius on most days. On a few days, the daily maximum temperature could reach a high of 35 degrees Celsius. Most nights may also be warm and humid, with temperatures staying above 27 degrees Celsius.

4            With the dry conditions in the surrounding region, hotspots with smoke plumes have been observed, mostly in the southern and central parts of Sumatra and various parts of Kalimantan. The dry conditions are expected to persist in the coming days. Under the prevailing southeasterly or southwesterly winds, Singapore may experience hazy conditions should the fires intensify. The National Environment Agency (NEA) will continue to closely monitor the situation and provide updates if the situation changes. Should the 24-hour PSI enter the Unhealthy range, NEA will provide daily haze advisories.

5            For updates of the daily weather forecast, please visit the MSS website (www.weather.gov.sg), NEA website (www.nea.gov.sg), or download the myENV app.

 REVIEW OF THE PAST TWO WEEKS (1 – 16 August 2026)

 6            Southwest Monsoon conditions prevailed over Singapore and the surrounding region in the first half of August 2026, with winds blowing mostly from the southeast or south.

7            The first half of August 2026 was mostly dry, with only a few days of brief showers over Singapore. These conditions were attributed to suppressed rain cloud formation caused by a dry air mass over Singapore and the surrounding region. Thundery showers affected parts of the island on a few days during this period. The highest rainfall recorded in the first half of August 2026 was a daily total of 39.2mm, registered at Seraya Road on 2 August 2026 and Paya Lebar on 15 August 2026.

 8        In the first half of August 2026, daily maximum temperatures exceeded 33 degrees Celsius on all but one day. The highest daily maximum temperature of 34.9 degree Celsius was recorded at Pulau Ubin on 14 August 2026. The nights were warm, with minimum night-time temperatures remaining above 27 degrees Celsius across many parts of the island.

9     Well-below-average rainfall was recorded across the island in the first half of August 2026. The highest anomaly of 100 per cent below-average was recorded at Changi.

CLIMATE STATION STATISTICS

METEOROLOGICAL SERVICE SINGAPORE

17 Aug 2026