Cat Ba
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Cat Ba Weather in May

In Cat Ba, May brings high daytime temperatures around 29°C (84°F), with nights cooling to 26°C (79°F). This month falls within the rainy season, so expect frequent rainfall.

Rainfall in Cat Ba in May

As part of the rainy season, Cat Ba sees around 14 days of rain in May, with an average of 190 mm (7.5 in). With rain on many days and solid totals, showers are frequent and often moderately heavy. Waterproof gear is a sensible idea.

Temperature in Cat Ba in May

May in Cat Ba sees highs of 29°C (84°F) and lows of 26°C (79°F) overnight. The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. Nights stay warm at around 26°C (79°F), so light bedding and good ventilation are worth thinking about.

Sunshine in Cat Ba in May

The days are predominantly sunny, with an estimated total of around 190 hours of sunshine. Rain is often only seen in the afternoon or evening, leaving clear skies for most of the day. This results in rainy months that still feel bright and are suitable for travel.

If you prefer enjoying temperate temperatures and rain-free days, January, February, March, April, November and December typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.

Cat Ba Temperature in May

Min Temperature
26°C (79°F)
Max Temperature
29°C (84°F)
Chance of Rain
45%
Precipitation
190 mm (7.5 in)
Rainy days
14 days
Humidity
84% *
Sunshine
190 hours *
Percentage Sunshine
*
* Data from: Ha Long, Vietnam (24 KM, 15 Miles).

Cat Ba Weather by Month

Pick a month to see the average temperature, rainfall and sunshine in Cat Ba - and find the best time to visit.

Daily Historical Temperatures

50-year average (1976-2025)

Based on our historical records, temperatures in Cat Ba typically stay consistent throughout May, with daily highs averaging around 29°C (84°F). Nights are warm, with lows typically ranging from 23°C (73°F) to 26°C (79°F).

Average temperatures in May

Daily Historical Precipitation

50-year average (1976-2025)

Average daily rainfall for each day of the month based on long-term records.

Average precipitation in May

Historical weather records for Cat Ba in May

Browse day-by-day weather records for Cat Ba spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.

Cat Ba historical weather extremes in May

Our historical data for Cat Ba spans 1994 to 2026, revealing these weather extremes.

  • The warmest day in May was on May 21, 1998, with a maximum of 40°C (104°F).
  • On May 5, 2004, Cat Ba saw its coldest May day with temperatures maxing out at 20°C (68°F).
  • The lowest overnight temperature recorded in May was 17°C (63°F) (May 5, 1994).

Best Places in Vietnam in May

Find out more about the weather in Vietnam and which places have the best travel conditions in this month. See all of Vietnam in May →

perfect weather
pleasant
tolerable
unpleasant
poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

What to Wear in Cat Ba in May

Warm but pleasant conditions in Cat Ba in May. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. It's going to pour! Pack a good poncho and prepare for very wet conditions. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.

What To Do in Cat Ba in May

We rated the following activities from 1 (least suitable) to 10 (best) to do.

  • Swimming
    7/10
  • Cycling
    7/10
  • Walking
    7/10
  • Camping
    7/10
  • Outdoor sports
    7/10

Cat Ba 3-Day Forecast

More climate data for Cat Ba

Popular in May

Where to go in May - average daytime high across popular destinations.

Bucket list

Need travel inspiration? Check out our bucket list articles and be inspired.