Cát Bà weather in February

In February, Cát Bà sees average daytime highs of 19°C and overnight lows near 17°C, with 23 mm of rain across 5.7 wet days and about 11.3 hours of daylight. It is the 11th-warmest and 12th-wettest month of the year here.

Day-to-day highs hold fairly steady near 19°C through the month. The sky is clear or mostly clear about 18% of the time in February, and the air most often feels humid.

Daylight stretches from about 11 h 06 min at the start of February to 11 h 30 min by month's end. Set against the rest of the year, February is Cát Bà's 9th-clearest and 8th-windiest month. For the whole year in context, see Cát Bà's year-round climate.

Daytime high
19°
11th warmest
Overnight low
17°
2nd coldest
Rainfall
23 mm
5.7 wet days
Daylight
11 h 18 min
6:28 AM – 5:45 PM
Cloud cover
74%
9th clearest
Wind
15 km/h
8th windiest
Solar energy
3.13 kWh/m²
Travel score
6.4
out of 10

Cát Bà is town in Vietnam.

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in February

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 19°C through the month.

A typical February day in Cát Bà reaches about 19°C in the afternoon and slips back to 17°C overnight — a 2°C spread between the day's warmth and the night's chill. On most days the high lands between 16°C and 22°C. Set against its neighbours, February runs on par with January and about 2°C cooler than March.

10°15°20°25°151015202528
Avg high (°C)Avg low (°C)
11816
21816
31816
41916
51916
61916
71917
81917
91917
101917
111917
121917
131917
141917
151917
161917
171917
181917
191917
201917
212017
222017
232018
242018
252018
262018
272018
282018

How February really feels in Cát Bà

Once humidity and wind are folded in, February averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

February sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Cát Bà weather by month

How February compares with the rest of the year at a glance. February is the 11th-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan19° / 16°407.610.96.2
Feb19° / 17°235.711.36.4
Mar21° / 19°407.611.96.6
Apr25° / 23°527.712.57.0
May28° / 26°18515.5135.1
Jun30° / 28°21517.813.23.7
Jul30° / 28°30319.813.13.6
Aug30° / 27°3992412.73.3
Sep29° / 26°3052012.14.0
Oct28° / 25°13411.611.56.2
Nov24° / 21°568.4117.2
Dec21° / 18°396.310.86.9

Cloud cover in February

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 18% of the time in February.

Beyond those clear spells, partly cloudy skies cover about 12% of February, with mostly cloudy or overcast conditions the remaining 71%.

0%25%50%75%100%151015202528
Clearer (%)Cloudier (%)
13268
23367
33367
43367
53367
63367
73367
83268
93169
103169
113169
123169
133070
142971
152971
162872
172872
182773
192674
202674
212674
222674
232674
242674
252773
262773
273070
283070

Chance of precipitation in February

Any precipitation

Cát Bà gets around 23 mm of rain over 5.7 wet days in February, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 21% and peaks near 22% on the wettest days.

0%10%20%30%151015202528
Rain chance (%)
122
222
321
421
520
620
720
820
920
1020
1120
1220
1320
1420
1520
1620
1720
1820
1921
2021
2121
2221
2321
2421
2521
2621
2721
2821

Humidity in February

DryComfortableHumidMuggyOppressiveMiserable

Most of February feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, February lands in the humid band about 29% of days. Sticky, muggy-or-worse air turns up on roughly 24% of them.

0%25%50%75%100%151015202528
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1412024141
2402024151
3392025151
4372025161
5362126161
6342127171
7332127181
8312127192
9302128202
10292028202
11292029212
12282029212
13272030221
14272030221
15261931231
16251931231
17251931241
18251931251
19241831251
20241831261
21241831271
22231830271
23231830271
24221930282
25221930282
26211930282
27201930293
28201930293

Wind in February

Winds average 15 km/h in February.

Across February, daily wind ranges from about 15 km/h on the calmest days to 16 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202528
Wind speed (km/h)Feels
116light breeze
216light breeze
316light breeze
416light breeze
516light breeze
616light breeze
716light breeze
816light breeze
915light breeze
1015light breeze
1115light breeze
1215light breeze
1315light breeze
1415light breeze
1515light breeze
1615light breeze
1715light breeze
1815light breeze
1915light breeze
2015light breeze
2115light breeze
2215light breeze
2315light breeze
2415light breeze
2515light breeze
2615light breeze
2715light breeze
2815light breeze

Sunrise & sunset in February

DaylightNight

Daylight runs from about 11 h 06 min at the start of February to 11 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 24 minutes over February. Sunrise moves from 6:33 AM to 6:19 AM, and sunset from 5:37 PM to 5:51 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202528
Daylight (h)Sunrise (AM)Sunset (PM)
111.16:335:37
211.16:335:38
311.16:335:39
411.16:325:39
511.16:325:40
611.16:325:40
711.26:315:41
811.26:315:41
911.26:305:42
1011.26:305:43
1111.26:305:43
1211.26:295:44
1311.36:295:44
1411.36:285:45
1511.36:285:45
1611.36:275:46
1711.36:265:46
1811.36:265:47
1911.46:255:47
2011.46:255:48
2111.46:245:48
2211.46:235:49
2311.46:235:49
2411.56:225:50
2511.56:215:50
2611.56:215:50
2711.56:205:51
2811.56:195:51

Solar energy in February

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in February, about 3.13 kWh/m².

For context, solar energy here swings from a low near 2.74 kWh/m² to a high of 5.4 kWh/m² in May across the year — February's 3.13 kWh/m² sits near the bottom.

01234151015202528
Solar energy (kWh/m²)Level
13.0Moderate
23.0Moderate
33.0Moderate
43.0Moderate
53.1Moderate
63.1Moderate
73.1Moderate
83.1Moderate
93.1Moderate
103.1Moderate
113.1Moderate
123.1Moderate
133.2Moderate
143.2Moderate
153.2Moderate
163.2Moderate
173.2Moderate
183.2Moderate
193.2Moderate
203.2Moderate
213.2Moderate
223.3Moderate
233.3Moderate
243.3Moderate
253.3Moderate
263.4Moderate
273.4Moderate
283.4Moderate
Planning a trip in February

Hazard calendar for Cát Bà

In seasonPeak

In February, Cát Bà sits inside its pacific typhoon season. The full year is below, with each hazard's peak months called out.

Cát Bà sits in the Pacific typhoon belt; the season peaks July–October.

Cát Bà's monsoon runs May–September, when most of the year's rain falls.

Pacific typhoon
Monsoon
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is February a good time to visit Cát Bà?

Our two travel scores rate February for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

6.4
Sightseeing
5th-best month of the year
2.9
Beach & pool
11th-best month of the year

February is a reasonable time to visit Cát Bà for sightseeing.

What to pack for Cát Bà in February

From February's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In February, Cát Bà sees daytime highs around 19°C and nights near 17°C. Little to plan around — just the basics. About 6 days see rain.

Sea temperature near Cát Bà in February

The nearest coast averages about 20°C in February — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 14 km away) is warmest in August at about 30°C and coldest in February near 20°C.

It's comfortable for a long swim from Mar 6 to Jan 18 — about 10.5 months when the water holds above 20°C.

20°25°30°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan20Refreshing
Feb20Cool
Mar20Refreshing
Apr23Refreshing
May27Warm
Jun29Tropical
Jul30Tropical
Aug30Tropical
Sep29Tropical
Oct28Warm
Nov25Warm
Dec22Refreshing

UV index in Cát Bà in February

LowModerateHighVery highExtreme

Clear-sky midday UV in February peaks around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Cát Bà peaks around July 12 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 at about 6 (high).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highHighJul 12UV 12Dec 19UV 6
UV index (midday)Level
Jan7High
Feb8Very high
Mar9Very high
Apr8Very high
May10Extreme
Jun12Extreme
Jul12Extreme
Aug9Very high
Sep9Very high
Oct9Very high
Nov7High
Dec6High

Air quality in Cát Bà in February

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where February falls, not just the annual average.

Air quality in Cát Bà is worst in January — around 42 µg/m³ PM2.5 (poor), about 2.6× the cleanest month (July, 16 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0204060JanFebMarAprMayJunJulAugSepOctNovDecPoorModeratePoorJan 2342 µg/m³Jul 1716 µg/m³
PM2.5 (µg/m³)Level
Jan42Poor
Feb42Poor
Mar41Poor
Apr40Poor
May26Moderate
Jun19Moderate
Jul16Moderate
Aug18Moderate
Sep21Moderate
Oct27Moderate
Nov29Moderate
Dec39Poor
Location & terrain

Where is Cát Bà?

Cát Bà sits at 20.7°N, 107.0°E, 24 m above sea level, in Vietnam. The nearest listed city is Ha Long, 25 km away.

Topography around Cát Bà

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Cát Bà.

Within 3 km, the terrain around Cát Bà has only modest variations in elevation — a maximum elevation change of 205 m around an average of 22 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 299 m; within 80 km, large variations in elevation — a maximum elevation change of 1,180 m.

The land around Cát Bà is covered by water (58%) and trees (36%) within 3 km, water (80%) within 16 km, and water (51%) and trees (29%) within 80 km.

3 km
205 m
16 km
299 m
80 km
1,180 m
treesgrasslandcroplandartificial surfacesbare terrainwatermangroves
February weather nearby: Ha Long 25 km · Đố Sơn 27 km · Cẩm Phả 39 km · Haiphong 41 km · Cẩm Phả Mines 41 km · Thành Phố Uông Bí 45 km · Kiến An 45 km · Thị Trấn Mạo Khê 60 km

Vietnam travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type A / B / C / F
220 V · 50 Hz
Prices
≈ 29% of US
price level, 2025
GDP per capita
$5,066
2025
Happiness
6.4 / 10
World Happiness, 2025
Safe drinking water
59%
of population, 2024
Homicide rate
1.5
per 100k, 2011
Road deaths
30.6
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Moderate
EF EPI 500
Religion
none 86%Catholic 6%Buddhist 6%Protestant 1%

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 Cát Bà (20.7278°, 107.0482°, elevation 24 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).