Lan Ha Bay in July

July in Lan Ha Bay brings Midsummer heat with tropical energy. Swimming at Ba Trai Dao is world-class. Afternoon tropical downpours are common, usually clearing within an hour, though tropical depressions can occur.

Fact sheet

MonthJuly
Air temperature26–32°C
Sea temperature29.5°C
Average rainfall300 mm
Rainy days (≥1mm)16 days
Short answer

Day high 32°C, sea temperature 29.5°C, rainfall 300 mm. Midsummer heat with tropical energy. Swimming at Ba Trai Dao is world-class. Afternoon tropical downpours are common, usually clearing within an hour, though tropical depressions can occur.

Day high32 °C
Night low26 °C
Sea29.5 °C
Rainfall300 mm
Rainy days16 d
SwimmingExcellent (5/5)
Cruises & boatsGood (3/5)
KayakingGood (3/5)
CrowdsVery busy (5/5)

What is Lan Ha Bay like in July?

Midsummer heat with tropical energy. Swimming at Ba Trai Dao is world-class. Afternoon tropical downpours are common, usually clearing within an hour, though tropical depressions can occur.

During July, daytime temperatures typically reach 26–32°C with sea temperatures around 29.5°C. Cruise operations run throughout the month.

Pros and cons of visiting in July

Go if
  • Warmest swimming water of the year (29.5°C)
  • Dramatic cloud formations and photography
  • Lively sundeck and beach atmosphere
Think twice if
  • High humidity
  • Small possibility of storm-related cruise delays

What to pack

Check our complete packing checklist for seasonal clothing advice, dry bags, and sun protection.

Questions people ask

Can you swim in Lan Ha Bay in July?

Sea temperature in July is 29.5°C. Very comfortable and warm for swimming.