Weather in Cát Bà

14-day forecast · updated today, Thursday, October 29, at 11:19 am (GMT+7)

Now · light drizzle 83 °F

Feels like: 88 °F
Low / high: 78 / 83 °F
Rain: 90% · 0.18 in
Wind: 14 mph E

→ 30.07 inHg · steady

Today in Cát Bà: light showers, 78 °F to 83 °F, with a 90% chance of rain (0.18 in) and a moderate breeze from the east (14 mph). Tomorrow, light rain, 77 °F to 82 °F and a 100% chance of rain. The warmest day of the week is Sunday 1, at 84 °F.

Temperatures for the next 14 days

83° 78°
Today
82° 77°
Fri 30
84° 78°
Sat 31
84° 80°
Sun 1
83° 80°
Mon 2
82° 79°
Tue 3
83° 80°
Wed 4
83° 77°
Thu 5
83° 77°
Fri 6
83° 79°
Sat 7
81° 75°
Sun 8
76° 68°
Mon 9
78° 72°
Tue 10
76° 71°
Wed 11

Day by day

Day	Sky	Low / high	Rain	Max wind	Max wave	High tides	Model
Today · 29	Light showers	78 / 83 °F	90% · 0.18 in	16 mph E	1.8 ft	5:05 am	ECMWF
Fri 30	Light rain	77 / 82 °F	100% · 0.78 in	11 mph ESE	1.4 ft	6:11 am	ECMWF
Sat 31	Drizzle	78 / 84 °F	91% · 0.12 in	13 mph ESE	1.1 ft	7:22 am	ECMWF
Sun 1	Light drizzle	80 / 84 °F	29% · 0.07 in	12 mph S	1.6 ft	8:35 am	ECMWF
Mon 2	Light drizzle	80 / 83 °F	71% · 0.04 in	11 mph E	1.1 ft	9:49 am	ECMWF
Tue 3	Light drizzle	79 / 82 °F	30% · 0.06 in	14 mph E	1.4 ft	10:58 am	ECMWF
Wed 4	Drizzle	80 / 83 °F	74% · 0.13 in	9 mph SSE	0.8 ft	12:04 pm	ECMWF
Thu 5	Drizzle	77 / 83 °F	90% · 0.36 in	7 mph ESE	0.7 ft	1:07 pm	ECMWF
Fri 6	Light drizzle	77 / 83 °F	79% · 0.22 in	8 mph E	0.7 ft	2:20 pm	ECMWF
Sat 7	Light drizzle	79 / 83 °F	67% · 0.09 in	9 mph E	1.4 ft	—	ECMWF
Sun 8	Light drizzle	75 / 81 °F	59% · 0.09 in	17 mph NE	3.5 ft	1:56 am	ECMWF
Mon 9	Light rain	68 / 76 °F	44% · 0.35 in	13 mph NNE	3.2 ft	2:55 am	ECMWF
Tue 10	Overcast	72 / 78 °F	36%	16 mph NE	3.7 ft	3:48 am	ECMWF
Wed 11	Rain	71 / 76 °F	25% · 2.10 in	16 mph NE	3.1 ft	4:40 am	ECMWF

Each day comes from the best model covering this spot: regional ones first (HRRR and NBM in the U.S., AROME, ICON-EU), then ECMWF; day 16, NOAA GFS. Waves: Météo-France up to day 10, then ECMWF WAM, coarser and further offshore. High tides: our own tide calculation.

Today, every 3 hours

Time	12:00 am	3:00 am	6:00 am	9:00 am	12:00 pm	3:00 pm	6:00 pm	9:00 pm
Sky	Clear	Light drizzle	Partly cloudy	Light drizzle	Light drizzle	Partly cloudy	Light drizzle	Light drizzle
Temperature	81°	80°	80°	82°	83°	82°	82°	80°
Chance of rain	0%	52%	38%	57%	68%	34%	51%	81%
Rain	0.00 in	0.00 in	0.00 in	0.01 in	0.00 in	0.00 in	0.01 in	0.02 in
Wind (mph)	9 E	8 ESE	8 ENE	12 ENE	15 E	15 E	14 E	12 E
Humidity	75%	79%	78%	74%	73%	76%	78%	86%
UV	0	0	0	3	5	2	0	0
Model	ECMWF	ECMWF	ECMWF	ECMWF	ECMWF	ECMWF	ECMWF	ECMWF

Do the models agree?

Low confidence

They don't agree on rain today: it may change, so check again closer to the day.

What 4 forecast models say for the next few days. The closer they are, the more reliable the forecast.

HighRainWind

Do the models agree? · High
High (°F)	Today	Fri 30	Sat 31	Sun 1	Mon 2	Tue 3	Wed 4
ECMWF	83°	82°	84°	84°	83°	82°	83°
AIFS	83°	82°	83°	84°	83°	82°	83°
GFS	85°	86°	85°	86°	85°	82°	85°
ICON	85°	83°	86°	86°	86°	85°	87°
Confidence	high	high	high	high	high	high	high

Do the models agree? · Rain
Rain	Today	Fri 30	Sat 31	Sun 1	Mon 2	Tue 3	Wed 4
ECMWF	0.18 in	0.78 in	0.12 in	0.07 in	0.04 in	0.06 in	0.13 in
AIFS	0.24 in	0.95 in	0.16 in	0.05 in	0.18 in	0.14 in	0.12 in
GFS	0.03 in	0.11 in	0.06 in	0.15 in	0.13 in	0	0.02 in
ICON	0	0.13 in	0.03 in	0.00 in	0.06 in	0	0
Confidence	low	medium	medium	medium	high	medium	medium

Do the models agree? · Wind
Wind (mph)	Today	Fri 30	Sat 31	Sun 1	Mon 2	Tue 3	Wed 4
ECMWF	1628	1121	1322	1221	1124	1426	918
AIFS	15	12	10	13	13	14	7
GFS	1717	1415	1415	1013	1518	1517	1013
ICON	1219	814	1016	1017	916	1119	915
Confidence	high	high	high	high	high	high	high

Chance of rain from the ensemble models

Model	Today	Fri 30	Sat 31	Sun 1	Mon 2	Tue 3	Wed 4
ECMWF (51 scenarios)	90%	100%	91%	29%	71%	30%	74%
GFS (GEFS, 31 scenarios)	99%	100%	81%	39%	72%	49%	68%

Each model's day runs midnight to midnight local time; models that reach fewer days are left blank. Rain: daily total. Wind: the day's highest average wind and, in small type, the strongest gust. Highlighted: values that stand out from the rest. The chance of rain comes from many runs of the same model with slightly different starting data.

Outlook

How the coming weeks and months compare with what is normal for the time of year. It is a trend, not a day-by-day forecast.

Next few weeks, compared with normal: warmer, wetter and a warmer sea.

Next 6 weeks

When	TemperatureTemp.	Rain	Sea	Typical high / low
Nov 2 – Nov 8Nov 2–Nov 8	Above +3.1 °F	Well above +157%	Well above +4.1 °F	—
Nov 9 – Nov 15Nov 9–Nov 15	A bit above +2.2 °F	Above +72%	Above +3.1 °F	—
Nov 16 – Nov 22Nov 16–Nov 22	Above +2.9 °F	Above +75%	Above +3.2 °F	78° / 75°
Nov 23 – Nov 29Nov 23–Nov 29	Above +3.6 °F	Above +54%	Above +3.2 °F	76° / 74°
Nov 30 – Dec 6Nov 30–Dec 6	Above +3.8 °F	Above +65%	Well above +3.6 °F	75° / 72°

Coming months

When	TemperatureTemp.	Rain	Sea
November	Above +2.7 °F	Normal	Above +3.2 °F
December	A bit above +1.4 °F	Normal	Above +2.5 °F
January	A bit above +2.0 °F	Normal	Above +2.2 °F
February	Above +2.7 °F	Normal	Above +2.3 °F
March	Above +2.7 °F	Normal	Above +2.7 °F

Weeks: ECMWF 46-day (average of its scenarios), against the normal of the last 20 years for those dates. Months: ECMWF SEAS5. Rain: total against normal. The further ahead, the closer it gets to normal and the less detail it can give.

Cát Bà climate by monthClimate by month

Normal weather for each month (1991–2020 averages)

The best time to visit Cát Bà is from October to November and in April: highs of 77 °F to 83 °F, about 7 rainy days a month and 6 hours of sunshine a day.

Typhoon season: from July to October. In the last 30 years (1996–2025), 38 tropical cyclones passed within 93 mi of Cát Bà, one or two a year; 10 of them with hurricane-force winds (74 mph or more). The most recent: Matmo, in October 2025.

66° 58°

JanJ
67° 60°

FebF
71° 63°

MarM
78° 70°

AprA
86° 76°

MayM
89° 79°

JunJ
88° 79°

JulJ
87° 78°

AugA
87° 76°

SepS
83° 73°

OctO
77° 67°

NovN
69° 60°

DecD

Highs and lows
Monthly rainfall
Best time

Month	High	Low	Rain	Rainy daysDays	Sun (h/day)	Water	Waves	Cyclones
JanuaryJan	66°	58°	0.46 in	3	3.1	68°	2.6 ft	–
FebruaryFeb	67°	60°	0.91 in	3	3.6	67°	2.3 ft	–
MarchMar	71°	63°	1.26 in	6	3.4	69°	2.2 ft	–
AprilApr	78°	70°	1.98 in	7	4.6	73°	2.2 ft	–
MayMay	86°	76°	6.35 in	14	5.9	81°	2.4 ft	–
JuneJun	89°	79°	7.36 in	19	6.3	85°	2.9 ft	3
JulyJul	88°	79°	19.17 in	21	6.1	85°	2.7 ft	11
AugustAug	87°	78°	16.76 in	22	5.9	85°	2.1 ft	11
SeptemberSep	87°	76°	13.35 in	16	6.3	85°	2.0 ft	6
OctoberOct	83°	73°	2.02 in	9	6.9	82°	2.5 ft	6
NovemberNov	77°	67°	1.23 in	5	5.4	78°	2.5 ft	1
DecemberDec	69°	60°	0.87 in	3	3.7	72°	2.9 ft	–

Month	Water	Waves	Cyclones
Jan	68°	2.6 ft	–
Feb	67°	2.3 ft	–
Mar	69°	2.2 ft	–
Apr	73°	2.2 ft	–
May	81°	2.4 ft	–
Jun	85°	2.9 ft	3
Jul	85°	2.7 ft	11
Aug	85°	2.1 ft	11
Sep	85°	2.0 ft	6
Oct	82°	2.5 ft	6
Nov	78°	2.5 ft	1
Dec	72°	2.9 ft	–

Days: rainy days in the month. Sun: hours a day.

A normal year brings 71.71 in of rain on about 129 days and about 1,850 hours of sunshine.

Cyclones: how many tropical cyclones (tropical storms, hurricanes and typhoons) passed within 93 mi in each month from 1996 to 2025, according to IBTrACS (NOAA).

1991–2020 averages. Highs, lows and rainfall: TerraClimate; rainy days (0.04 in or more): NASA POWER (MERRA-2); sunshine hours: estimated from solar radiation; water: NOAA OISST; waves (average height): ERA5, 2011–2020. Normals are not a forecast: any given year can turn out very different. Sources and licenses

Temperature

Now83 °Ffeels like 88 °F

Tomorrow77 / 82 °F

It's 83 °F now (feels like 88 °F). Today, 78 °F to 83 °F; tomorrow, 77 °F to 82 °F.

Chance of rain

Today 90% 0.18 in
Fri 30 100% 0.78 in
Sat 31 91% 0.12 in
Sun 1 29% 0.07 in
Mon 2 71% 0.04 in
Tue 3 30% 0.06 in
Wed 4 74% 0.13 in

Today the chance of rain reaches 90%, with 0.18 in in total. The next day with likely rain is Friday 30: 100% and 0.78 in.

Recent rain: last 24 hours, 0.05 in; last 3 days, 0.20 in; last 7 days, 0.30 in.

Humidity and dew point

Humidity73%

Dew point73 °F

Humidity is 73% now and the dew point is 73 °F. With a dew point this high, it feels muggy.

The dew point is the temperature at which the air becomes saturated: the higher it is, the heavier the air feels.

Visibility and fog

Now15 migood

Clouds80%

Visibility is good now (15 mi). No fog expected today.

The model gives visibility up to about 15 mi: beyond that, the horizon is clear.

UV index

Now5

Today's peak5moderate

Fri 30: 5 · Sat 31: 7 · Sun 1: 7

Index	Level	What to do
0–2	low	No special protection needed.
3–5	moderate	Hat, sunglasses and sunscreen around midday.
6–7	high	Sunscreen, hat and shade between 12 and 4 pm.
8–10	very high	Avoid the midday sun; reflection off the water adds to it.
11+	extreme	Avoid the sun between 11 am and 5 pm; protect yourself even if it is cloudy.

Reflection off water and sand adds radiation: protect yourself more on a boat or at the beach.

Barometric pressure

↗ Rising Anglers say fish bite less for a while
→ Steady · now Anglers expect normal activity
↘ Falling Anglers say fish feed more before the change

30.0030.1030.20 29.98

Steady now (−0.01 inHg in 3 hours). It barely changes over the next 48 hours. Steady pressure: anglers expect normal activity. Fast changes, either way, tend to affect fishing.

Air and pollen

Air qualityModerate · 58

Saharan dustNo

Previous days

The weather over the last 30 days, as the models analyzed it. Tap a day to see it hour by hour.

Day	Sky	Low / high	Rain	Max wind
Wed 28	Drizzle	80 / 83 °F	0.09 in	14 mph ENE
Tue 27	Light drizzle	81 / 85 °F	0.05 in	15 mph ENE
Mon 26	Light drizzle	80 / 84 °F	0.06 in	16 mph E
Sun 25	Overcast	81 / 86 °F	0	11 mph E
Sat 24	Light drizzle	81 / 85 °F	0.01 in	9 mph ESE
Fri 23	Light drizzle	81 / 85 °F	0.05 in	8 mph SSE
Thu 22	Light drizzle	81 / 86 °F	0.01 in	12 mph E

Show all 30 days

Day	Sky	Low / high	Rain	Max wind
Wed 21	Light drizzle	80 / 85 °F	0.07 in	9 mph ENE
Tue 20	Partly cloudy	81 / 85 °F	0	10 mph ESE
Mon 19	Light drizzle	80 / 85 °F	0.05 in	11 mph E
Sun 18	Light drizzle	82 / 85 °F	0.01 in	11 mph ESE
Sat 17	Light drizzle	81 / 86 °F	0.01 in	9 mph ESE
Fri 16	Mainly clear	79 / 86 °F	0	11 mph SE
Thu 15	Light drizzle	81 / 84 °F	0.02 in	11 mph ESE
Wed 14	Clear sky	80 / 87 °F	0	7 mph ENE
Tue 13	Clear sky	81 / 86 °F	0	9 mph ENE
Mon 12	Clear sky	80 / 85 °F	0	8 mph ENE
Sun 11	Overcast	79 / 85 °F	0	8 mph NE
Sat 10	Light drizzle	78 / 85 °F	0.04 in	10 mph NE
Fri 9	Heavy drizzle	78 / 84 °F	0.14 in	19 mph ENE
Thu 8	Clear sky	79 / 83 °F	0	11 mph NE
Wed 7	Clear sky	76 / 83 °F	0	9 mph NE
Tue 6	Overcast	73 / 82 °F	0	15 mph NNE
Mon 5	Showers	74 / 80 °F	0.34 in	15 mph NNE
Sun 4	Showers	80 / 86 °F	0.49 in	10 mph SE
Sat 3	Overcast	84 / 88 °F	0	12 mph SSE
Fri 2	Light drizzle	84 / 88 °F	0.02 in	9 mph SSE
Thu 1	Mainly clear	84 / 88 °F	0	9 mph SSE
Wed 30	Clear sky	84 / 89 °F	0	9 mph SSE
Tue 29	Mainly clear	84 / 88 °F	0	14 mph S

These are the models at the start of each day (ECMWF and GFS; waves from Météo-France), not readings from a weather station: there can be differences at specific spots.

Questions about the weather in Cát BàQuestions

What's the weather like today in Cát Bà?

Light showers, from 78 °F to 83 °F, with a moderate breeze from the east (14 mph) and a 90% chance of rain.

Will it rain tomorrow in Cát Bà?

On Friday 30 the chance of rain is 100% (0.78 in): light rain.

How warm will it be this week?

Between a low of 77 °F and a high of 84 °F; the warmest day, Sunday 1.

What's the UV index today?

It reaches 5 (moderate). Hat, sunglasses and sunscreen around midday.

Is the pressure rising or falling?

It's 30.07 inHg and steady: −0.01 inHg over the last 24 hours.

When is the best time to visit Cát Bà?

The best time to visit Cát Bà is from October to November and in April: highs of 77 °F to 83 °F, about 7 rainy days a month and 6 hours of sunshine a day.

What is the weather like in Cát Bà in October?

In October, Cát Bà normally sees highs of 83 °F and lows of 73 °F, with about 9 rainy days (2.02 in for the month) and 7 hours of sunshine a day. The sea is around 82 °F. These are 1991–2020 averages.

What are the warmest and wettest months in Cát Bà?

The warmest is June, with average highs of 89 °F, and the coldest January, with lows of 58 °F. The wettest is July (19.17 in) and the driest, January.

When is typhoon season in Cát Bà?

Typhoon season: from July to October. In the last 30 years (1996–2025), 38 tropical cyclones passed within 93 mi of Cát Bà, one or two a year; 10 of them with hurricane-force winds (74 mph or more). The most recent: Matmo, in October 2025.

More about Cát Bà today

Weather near Cát Bà

Only places with a different forecast: spots a few miles apart share the same model cell and wouldn't add anything.

Learn more

Weather: Open-Meteo, CC BY 4.0, with the best model for each spot and lead time (NOAA HRRR and NBM in the U.S., Météo-France AROME, DWD ICON-EU, ECMWF IFS and NOAA GFS); ECMWF grid point 3.5 mi away. The comparison also uses ICON (DWD), AIFS (ECMWF) and ARPEGE (Météo-France). Outlook: ECMWF 46-day and SEAS5. Chance of rain from ensemble models (ECMWF, GEFS and NBM). UV, air quality and pollen: CAMS (Copernicus).

Forecast from Open-Meteo (CC BY 4.0) with models from ECMWF, NOAA, Météo-France, DWD, Copernicus Marine and CAMS. Updated at 11:19 am (local time).

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