When is the best time to visit Con Dao? November-February delivers optimal conditions (dry season, calm seas 27-28°C, low humidity, clear skies) for beaches, diving, and outdoor activities. March-April remain good but increasingly humid. May-October monsoon season brings heavy rainfall (240-250mm July-August peaks), rough seas limiting water activities, and potential typhoons. Visit only if seeking turtle nesting tours (May-October season) or accepting significant weather disruption trade-offs.
Con Dao weather divides sharply: November-April dry season (excellent calm seas, minimal rain, comfortable temperatures) versus May-October monsoon (challenging heavy rain, rough seas, limited water activities). Therefore, visit November-February for optimal experience, extend to March-April if accepting higher humidity, or brave May-October ONLY if turtle nesting tours justify weather trade-offs. December-January winds can affect some beaches (prioritize Dam Trau’s protected location).
Quick Facts: Con Dao Weather
Best overall: November-February (dry season peak, calm seas, low humidity)
Still good: March-April (dry season end, warmer, increasing humidity)
Challenging: May-October (monsoon heavy rain, rough seas, typhoon risk)
Temperature range: 26-30°C year-round (relatively consistent)
Rainy season: May-October (170-250mm monthly, 15-22 rainy days)
Dry season: November-April (10-60mm monthly, 2-8 rainy days)
Sea temperature: 27-31°C (warm year-round, warmest June-October)
Typhoon season: May-October (occasional, not usually direct hits)
Special consideration: Turtle nesting May-October (ONLY reason visit monsoon season)
For complete Con Dao Islands guide including beaches, accommodation, and activities, see our Con Dao Islands review.
Con Dao Weather Seasons
Dry Season: November-April (BEST)
Characteristics:
- Rainfall: 10-60mm monthly (low)
- Rainy days: 2-8 days monthly (minimal disruption)
- Temperature: 26-28°C average (comfortable)
- Humidity: 72-79% (lower than monsoon)
- Sea conditions: Calm, clear (excellent diving/snorkeling)
- Wind: Moderate November-March (25-35mph northeastern winds Dec-Jan)
Best months within dry season:
November: Ideal transition (rainy season ending, calm seas returning, 27°C, 60mm rain, 6 rainy days). Pleasant weather, fewer crowds than Dec-Feb peak.
December-February: PEAK dry season (20-30mm rain, 2-4 rainy days, 26-27°C, low humidity 72-74%). Absolute best conditions BUT highest prices, most crowds, December-January northeastern winds (25-35mph) affect some beaches.
March: Dry season ending (20mm rain, 3 rainy days, 28°C, humidity increasing to 76%). Still excellent but warmer, more humid than Jan-Feb.
April: Transition to monsoon (60mm rain, 8 rainy days, 29°C, 79% humidity). Last good month before monsoon still swimmable but occasional thunderstorms appearing.
For Dam Trau Beach complete guide including protected swimming year-round, see our Dam Trau Beach review.
Monsoon Season: May-October (CHALLENGING)
Characteristics:
- Rainfall: 150-250mm monthly (heavy)
- Rainy days: 12-22 days monthly (significant disruption)
- Temperature: 28-30°C average (hot + humid = oppressive)
- Humidity: 79-81% (very high, sticky, uncomfortable)
- Sea conditions: Rough, murky (diving/snorkeling limited or impossible)
- Typhoon risk: Occasional (May-October vulnerability, though rarely direct hits)
Worst months within monsoon:
July-August: Peak monsoon (240-250mm rain, 20-22 rainy days, 29°C, 79-80% humidity). Wettest, most oppressive. Water activities severely limited by rough seas.
June, September: Heavy monsoon (180-240mm rain, 16-20 rainy days). Similar challenges to July-August, slightly less extreme.
May, October: Monsoon edges (150-170mm rain, 12-15 rainy days). Transitional better than peak monsoon but still challenging.
The ONLY reason to visit monsoon season: Turtle nesting tours May-October (peak June-August). Night tours observe Green and Hawksbill turtles laying eggs on Con Dao beaches.
For Con Dao National Park guide including turtle nesting tour details (May-October season), see our National Park review.
Monthly Con Dao Weather Breakdown
January-February (BEST):
- Temperature: 26-27°C
- Rain: 10-20mm (2-4 rainy days)
- Conditions: Optimal dry season, calm seas, low humidity
- Activities: All beaches, diving, boat tours, Prison visits
- Consideration: Occasional cold fronts (brief, rare)
March (EXCELLENT):
- Temperature: 28°C
- Rain: 20mm (3 rainy days)
- Conditions: Dry season ending, warming, humidity increasing
- Activities: All activities still excellent
- Consideration: Prepare for warmer afternoons
April (GOOD):
- Temperature: 29°C
- Rain: 60mm (8 rainy days)
- Conditions: Monsoon approaching, occasional thunderstorms
- Activities: Still good for water activities between storms
- Consideration: Plan flexibility for weather
May-October (CHALLENGING):
- Temperature: 28-30°C (feels hotter due to humidity)
- Rain: 150-250mm (12-22 rainy days)
- Conditions: Heavy rain, rough seas, high humidity
- Activities: turtle tours only reliable activity
- Consideration: Boat tours often canceled, beaches less appealing
November (GOOD):
- Temperature: 27°C
- Rain: 60mm (6 rainy days)
- Conditions: Monsoon ending, calm seas returning
- Activities: Improving conditions, fewer crowds
- Consideration: Excellent value (lower prices, good weather)
December (EXCELLENT):
- Temperature: 26°C
- Rain: 30mm (4 rainy days)
- Conditions: Peak dry season begins
- Activities: All activities optimal
- Consideration: December-January winds affect some beaches (use Dam Trau)
Sea Temperature & Swimming Conditions
Year-round warm: 27-31°C sea temperature (always swimmable temperature-wise)
Dry season (Nov-April): Calm seas, clear water, excellent visibility (10km), ideal diving/snorkeling
Monsoon season (May-Oct): Rough seas, murky water, reduced visibility, limited/canceled water activities
December-January wind consideration: Northeastern winds (25-35mph) create rough conditions at exposed beaches. Solution: Dam Trau Beach’s protected location ensures calm swimming even during windy periods.
For Con Dao beaches complete guide including which beaches protected during wind seasons, see our Con Dao Beaches review.
Activities by Season
Dry Season (November-April) Activities
Beaches: All beaches swimmable (Dam Trau, Nhat, An Hai, Suoi Nong). Dam Trau best during December-January winds.
Diving/Snorkeling: Excellent visibility (10km), calm seas, 1,300+ marine species, coral reefs pristine.
Boat tours: Lan Ha Bay tours, island hopping, fishing.
Con Dao Prison: Indoor attraction unaffected by weather.
Hiking: Con Dao National Park trails comfortable (lower humidity, minimal rain).
Monsoon Season (May-October) Activities
Turtle nesting tours: THE activity justifying monsoon visit. Night tours observe Green/Hawksbill turtles laying eggs (80-120 per nest). Peak June-August. Book advance through National Park rangers.
Con Dao Prison: Indoor, weather-independent. Monsoon season fewer crowds (easier viewing Tiger Cages, execution sites).
Indoor activities: Van Son Pagoda (sheltered), museums, seafood restaurants.
Beaches: Limited appeal (rough seas, murky water, heavy rain). Occasional calm days between storms allow brief swimming.
Boat tours: Frequently canceled (rough seas, safety concerns). Don’t plan itinerary around boat activities May-October.
Practical Con Dao Weather Tips
What to pack dry season (Nov-April):
- Light breathable clothing
- Reef-safe sunscreen
- Sunglasses, hat
- Light rain jacket (occasional showers)
- Beach gear, snorkel equipment
What to pack monsoon (May-Oct):
- Rain jacket, umbrella (ESSENTIAL)
- Quick-dry clothing
- Waterproof bags (protect electronics)
- Insect repellent (mosquitoes increase with rain)
- Accept limited beach activities
Booking strategy:
- Nov-Feb: Book 2-3 months advance (high demand, limited flights/ferries)
- March-April: Book 1 month advance
- May-Oct: Last-minute booking OK (low demand, availability)
Getting to Con Dao: Flight 45-min HCMC, Ferry 12-14h Vung Tau (rough seas May-Oct, cancellations possible) → Bookaway
Accommodation: → Klook
Con Dao tours: Diving, boat trips (dry season only reliable) → Klook
Final Verdict: Timing Makes or Breaks Con Dao
Con Dao weather creates dramatic seasonal value differences. Dry season (Nov-April) delivers paradise calm seas enable diving/boat tours, minimal rain allows beach relaxation, comfortable humidity makes exploration pleasant. Monsoon season (May-Oct) presents challenges with heavy rain disrupts activities, rough seas cancel water activities, oppressive humidity reduces comfort.
November-February if:
- Prioritizing beaches and water activities
- Want optimal diving/snorkeling conditions
- Seeking comfortable weather exploration
- First-time Con Dao visit
- Luxury stay (Six Senses experience)
March-April if:
- Accepting slightly warmer, more humid
- Want lower prices than peak season
- Flexible with occasional storms
- Still want good water conditions
May-October ONLY if:
- Passionate about turtle nesting tours (THE reason)
- Extreme budget priority (lowest prices)
- Comfortable with significant limitations
- Accept rough seas, heavy rain, canceled activities
Con Dao’s beauty year-round (pristine beaches, lush National Park, significant Prison history), but weather dramatically affects experience quality. November-February investment (higher prices, advance booking) pays dividends through optimal conditions enabling full Con Dao value (beaches, diving, boat tours, comfortable exploration). May-October budget savings come with major trade-offs (limited water activities, heavy rain, oppressive humidity) justifiable ONLY if turtle nesting tours prioritized over general beach vacation.
Visited Con Dao different seasons? Which weather best? Turtle tours worth monsoon trade-offs? Share experience!
FAQ
Best time visit Con Dao is November-February (dry season peak) offering calm seas 27-28°C, minimal rain (10-30mm monthly, 2-4 rainy days), low humidity (72-74%), clear skies, excellent diving/snorkeling visibility (10km), and comfortable temperatures (26-27°C). March-April remain good but warmer (28-29°C) with increasing humidity (76-79%). May-October monsoon season brings heavy rainfall (150-250mm monthly, 12-22 rainy days), rough seas limiting water activities, high humidity (79-81%), and typhoon risk visit ONLY if turtle nesting tours (May-October season) justify weather trade-offs.
Yes, Con Dao has rainy season May-October (monsoon period) with heavy rainfall peaking July-August (240-250mm monthly, 20-22 rainy days). Total annual rainfall 2,000-2,500mm concentrated these six months. Monsoon brings frequent thunderstorms, rough seas (murky water, canceled boat tours), high humidity (79-81% oppressive), and occasional typhoons (rare direct hits but vulnerability exists). Dry season November-April offers dramatically better conditions (10-60mm monthly rain, 2-8 rainy days, calm seas, clear water). Only visit rainy season if turtle nesting tours (May-October) outweigh significant weather challenges.
Con Dao sea temperature warm year-round (27-31°C always swimmable temperature-wise), but swimming conditions vary dramatically by season. Dry season November-April offers calm seas, clear water, excellent visibility ideal swimming all beaches. Monsoon May-October brings rough seas, murky water, safety concerns swimming limited or impossible many days. December-January northeastern winds (25-35mph) create rough conditions at exposed beaches BUT Dam Trau Beach’s protected location ensures calm swimming even during windy periods. Best swimming: November-February (consistently calm, clear). Worst swimming: July-August (peak monsoon, roughest seas).
