Seria in Winter
In winter (December, January and February), Seria sees average daytime highs around 29°C and overnight lows near 25°C, with 664 mm of rain over about 73 wet days across the season. It is the coldest season of the year and the 2nd-wettest season.
Across winter, daytime highs hold fairly steady around 29°C. The sky is clear or mostly clear about 3% of the time across winter, and the air most often feels oppressive.
Winter is Seria's 2nd-best season to visit on our travel score. Seria has little temperature swing across the year, so its calendar seasons blur — the season framing matters less here than for a place with four distinct seasons. For the whole year in context, see Seria's year-round climate.
- Avg daytime high
- 29°C
- coldest season of the year
- Avg overnight low
- 25°C
- Rainfall
- 664 mm
- 73 wet days
- Avg wind
- 9 km/h
- Travel score
- 3.4
- 2nd-best season
- Months
- Dec · Jan · Feb
Temperature in Seria in Winter
Across winter, daytime highs hold fairly steady around 29°C.
A typical winter day in Seria reaches about 29°C and drops to 25°C overnight. The warmest of the three months is December, the coolest January.
How winter really feels in Seria
Once humidity and wind are folded in, winter brings about 90 days that feel above 32°C and 0 that feel at or below 0°C.
The story in winter is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Seria weather by month
How the three winter months (December, January and February) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 29° / 25° | 227 | 24.5 | 11.8 | 3.5 |
| Feb | 29° / 25° | 151 | 20.1 | 11.8 | 3.8 |
| Mar | 29° / 25° | 134 | 23 | 12 | 3.6 |
| Apr | 30° / 25° | 176 | 25 | 12.1 | 3.1 |
| May | 30° / 25° | 189 | 23.4 | 12.2 | 3.2 |
| Jun | 30° / 25° | 206 | 21.1 | 12.3 | 3.5 |
| Jul | 30° / 25° | 187 | 20.8 | 12.2 | 3.6 |
| Aug | 30° / 25° | 192 | 21.7 | 12.2 | 3.5 |
| Sep | 30° / 25° | 199 | 23.6 | 12 | 3.2 |
| Oct | 29° / 25° | 269 | 27.8 | 11.9 | 3.0 |
| Nov | 29° / 25° | 284 | 28.5 | 11.8 | 2.8 |
| Dec | 29° / 25° | 287 | 28.1 | 11.7 | 3.0 |
Cloud cover in Winter
The sky is clear or mostly clear about 3% of the time across winter.
Chance of precipitation in Winter
Seria gets around 664 mm of rain over 73 wet days across winter. The line is the day-by-day chance of measurable precipitation.
Humidity in Winter
Most of winter feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Winter
Winds average 9 km/h across winter.
Sunrise & sunset in Winter
Daylight runs from about 11 h 48 min in early December to 11 h 54 min by late February. The lit band spans sunrise to sunset each day.
Solar energy in Winter
Average shortwave solar energy reaching the ground each day across winter, about 5.0 kWh/m².
Hazard calendar for Seria
In winter, Seria overlaps its pacific typhoon season. The full year is below, with each hazard's peak months called out.
Seria sits in the Pacific typhoon belt; the season peaks July–October.
Is winter a good time to visit Seria?
Our two travel scores rate winter for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
winter is a weaker month for outdoor sightseeing in Seria.
What to pack for Seria in Winter
From winter's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In winter, Seria sees daytime highs around 29°C and nights near 25°C. Pack light clothes and rain gear. Worth having: sun protection. About 73 days see rain.
Sea temperature near Seria in Winter
The nearest coast averages about 28°C across winter — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea offshore is warmest in May at about 30°C and coldest in February near 27°C.
The water stays above 20°C all year — warm enough for a swim any month.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 28 | 27 | 28 | 29 | 30 | 30 | 30 | 30 | 30 | 29 | 29 | 29 |
| Comfort | Warm | Warm | Warm | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 28 | Warm |
| Feb | 27 | Warm |
| Mar | 28 | Warm |
| Apr | 29 | Tropical |
| May | 30 | Tropical |
| Jun | 30 | Tropical |
| Jul | 30 | Tropical |
| Aug | 30 | Tropical |
| Sep | 30 | Tropical |
| Oct | 29 | Tropical |
| Nov | 29 | Tropical |
| Dec | 29 | Tropical |
UV index in Seria in Winter
Clear-sky midday UV across winter averages around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Seria peaks around February 18 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 13 at about 10 (extreme).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 13 | 14 | 14 | 14 | 13 | 12 | 11 | 13 | 12 | 13 | 11 | 10 |
| Level | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 13 | Extreme |
| Feb | 14 | Extreme |
| Mar | 14 | Extreme |
| Apr | 14 | Extreme |
| May | 13 | Extreme |
| Jun | 12 | Extreme |
| Jul | 11 | Extreme |
| Aug | 13 | Extreme |
| Sep | 12 | Extreme |
| Oct | 13 | Extreme |
| Nov | 11 | Extreme |
| Dec | 10 | Extreme |
Air quality in Seria in Winter
Average fine-particle pollution (PM2.5) through the year — so you can see where winter falls, not just the annual average.
Air quality in Seria is worst in May — around 68 µg/m³ PM2.5 (unhealthy), about 5.1× the cleanest month (October, 13 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 17 | 48 | 47 | 34 | 68 | 35 | 23 | 23 | 28 | 13 | 24 | 24 |
| Level | Moderate | Poor | Poor | Moderate | Unhealthy | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 17 | Moderate |
| Feb | 48 | Poor |
| Mar | 47 | Poor |
| Apr | 34 | Moderate |
| May | 68 | Unhealthy |
| Jun | 35 | Moderate |
| Jul | 23 | Moderate |
| Aug | 23 | Moderate |
| Sep | 28 | Moderate |
| Oct | 13 | Moderate |
| Nov | 24 | Moderate |
| Dec | 24 | Moderate |
Where is Seria?
Seria sits at 4.6°N, 114.3°E, 6 m above sea level, in Brunei. The nearest listed city is Kuala Belait, 11 km away.
Topography around Seria
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Seria.
Within 3 km, the terrain around Seria has only modest variations in elevation — a maximum elevation change of 45 m around an average of 6 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 78 m; within 80 km, large variations in elevation — a maximum elevation change of 630 m.
The land around Seria is covered by trees (37%), water (25%) and grassland (24%) within 3 km, trees (49%) and water (44%) within 16 km, and trees (59%) and water (38%) within 80 km.
Brunei travel facts
- Travel advisory
- Level 1
- Exercise Normal Precautions
- Power plugs
- Type G
- 240 V · 50 Hz
- Prices
- ≈ 35% of US
- price level, 2025
- GDP per capita
- $32,235
- 2025
- Homicide rate
- 0.5
- per 100k, 2013
- Road deaths
- 7.5
- per 100k/yr, 2019
- Income group
- High
- World Bank
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Seria (4.6064°, 114.3248°, elevation 6 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.