When is the best time to visit Hai Phong? April-October delivers optimal conditions (25-32°C warm temperatures, minimal rainfall 100-180mm monthly, lower humidity 75-80%) for Cat Ba Island ferry trips, Do Son Beach visits, and city exploration. November-March winter season brings cooler temperatures (15-22°C), occasional cold spells with drizzle, and rougher seas affecting Cat Ba ferry reliability still acceptable but less comfortable. June-September monsoon peaks (180-300mm rainfall) create wettest conditions but temperatures remain warm, making this manageable unlike southern Vietnam’s extreme monsoons.
Hai Phong weather offers year-round visitability with seasonal trade-offs. April-October warm season versus November-March winter. June-September monsoon wettest (180-300mm) but NOT prohibitive like southern Vietnam. Therefore, visit April-May or September-October for sweet spot (warm, dry, fewer crowds), extend to summer June-August if accepting humidity, or brave winter November-March if comfortable with 15-22°C temperatures and potential ferry delays.
Quick Facts: Hai Phong Weather
Best overall: April-May, September-October (warm, dry, calm seas, fewer crowds)
Still good: June-August (warmest 28-32°C, monsoon rain but manageable)
Acceptable: November-March (cooler 15-22°C, occasional cold spells, rougher seas)
Temperature range: 15-32°C (dramatic seasonal variation)
Warmest: June-August (28-32°C summer peak)
Coolest: December-February (15-22°C winter, occasional cold spells)
Wettest: June-September (180-300mm monsoon, July peak 300mm)
Driest: November-January (60-100mm, winter dry season)
Humidity: 70-85% year-round (subtropical)
Typhoon risk: June-September (occasional, northern Vietnam less vulnerable than central)
For complete Hai Phong guide including Somerset hotel review and city attractions, see our Hai Phong city guide.
Hai Phong Weather Seasons
Warm Season: April-October (BEST)
Characteristics:
- Temperature: 25-32°C (comfortable to warm)
- Rainfall: 100-180mm monthly average (June-Sept peaks 180-300mm)
- Humidity: 75-85% (noticeable but not oppressive)
- Sea conditions: Calm (excellent Cat Ba ferry reliability)
- Typhoon risk: June-September (occasional, northern Vietnam less affected)
Best months within warm season:
April-May: Sweet spot transition (20-28°C, 100-120mm rain, humidity rising but comfortable, calm seas, fewer crowds). Ideal for Cat Ba Island trips before summer peak.
June-August: Peak summer (28-32°C, 180-300mm rainfall July peak, 80-85% humidity). Warmest, wettest BUT still manageable. Cat Ba Island beaches busiest, Do Son Beach peak domestic tourism.
September-October: Excellent transition (25-28°C, 150-180mm rain declining, humidity dropping, calm seas returning, crowds thinning). Second sweet spot matching April-May quality.
For Cat Ba Island complete guide including ferry schedules and best beaches, see our Cat Ba Island review.
Cool Season: November-March (ACCEPTABLE)
Characteristics:
- Temperature: 15-22°C (cool, occasional cold spells 10-15°C)
- Rainfall: 60-100mm monthly (dry season)
- Humidity: 70-75% (lower than summer)
- Sea conditions: Rougher (northeastern monsoon winds, Cat Ba ferry delays possible)
- Cold spells: Brief periods 10-15°C with drizzle (1-3 day duration)
Months breakdown:
November: Transition cooling (20-25°C, 100mm rain decreasing, pleasant). Good month before winter cold arrives.
December-February: Peak winter (15-22°C, 60-80mm rain, occasional cold spells 10-15°C with drizzle). Coolest, driest BUT cold spells uncomfortable for beach activities. Cat Ba ferry rougher seas (northeastern winds), occasional delays/cancellations.
March: Winter ending (18-24°C, 80mm rain, warming trend). Improving conditions toward April sweet spot.
For Do Son Beach guide including seasonal swimming conditions, see our Do Son Beach review.
Monthly Weather Overview
Winter (Nov-March): 15-22°C cool, 60-100mm rain (dry), occasional cold spells, rough Cat Ba ferry. Best for: City exploration, museums.
Spring (April-May): 20-28°C comfortable, 100-120mm rain, calm seas. Best for: Cat Ba Island, Do Son Beach.
Summer (June-August): 28-32°C warmest, 180-300mm rain (July peak), high humidity. Best for: Beaches IF accepting heat.
Fall (Sept-Oct): 25-28°C pleasant, 150-180mm declining rain, calm seas. Best for: Cat Ba Island, fewer crowds.
Cat Ba Island Ferry Considerations
Cat Ba Island = Hai Phong’s #1 attraction (60km east, 2h ferry Got Pier). Weather directly impacts ferry reliability:
Best ferry conditions (April-October): Calm seas, reliable schedules, minimal delays. Comfortable 2h crossing.
Challenging ferry conditions (November-March): Northeastern monsoon winds create rough seas. Ferry delays possible, occasional cancellations extreme weather. 2h crossing uncomfortable (waves, motion sickness risk).
Ferry booking: → Bookaway
Activities by Season
Warm Season (April-October): Cat Ba Island BEST (calm ferry, beaches, Lan Ha Bay tours), Do Son Beach swimming, city exploration comfortable, outdoor dining pleasant.
For Hai Phong fast food guide including Korean restaurants, see our Hai Phong dining guide.
Cool Season (November-March): City exploration ideal (Opera House, museums, temples comfortable walking), Cat Ba ferry rougher (delays possible), beaches too cool swimming, indoor activities (Somerset Hai Phong, restaurants, shopping).
Practical Tips
Pack April-Oct: Light clothing, rain jacket, sunscreen, beach gear.
Nov-March Pack: Warm layers, jacket, long sleeves, scarf (cold spells).
Booking: April-May/Sept-Oct 1-2 months, June-Aug 2-3 months, Nov-March last-minute OK.
Transportation: Bus Hanoi 120-250k (1.5-2h), Train 50-100k (2.5-3h) → Bookaway
Cat Ba tours: → Klook
Final Verdict: Four-Season Moderate Climate
Hai Phong weather permits year-round visits with seasonal optimization. Unlike southern Vietnam’s extreme dry/wet or central Vietnam’s typhoons, northern Hai Phong offers moderate conditions manageable monsoon, but winter cold spells require preparation.
April-May or Sept-Oct: Optimal temperature (20-28°C), calm Cat Ba ferry, fewer crowds, shoulder pricing.
June-August: Warmest (28-32°C), humid (80-85%), beach swimming ideal, family summer vacation.
Nov-March: Cool (15-22°C), city-focused, avoiding crowds, NOT prioritizing Cat Ba (rough ferry).
Cat Ba consideration: Since Cat Ba = #1 Hai Phong attraction, weather should prioritize ferry reliability. April-October calm seas make Cat Ba accessible. November-March rough seas create delays.
Hai Phong’s moderate subtropical climate offers forgiving conditions year-round. April-May or September-October sweet spots deliver optimal experience (comfortable temperatures, calm ferry, beach activities). Winter acceptable city exploration but skip if Cat Ba Island priority. Unlike extreme weather regions, Hai Phong weather rarely ruins trips strategic timing enhances experience significantly.
Visited Hai Phong different seasons? Cat Ba ferry winter challenges? Share experience!
FAQ
Best time to visit Hai Phong is April-May and September-October (warm 20-28°C comfortable temperatures, moderate rainfall 100-150mm manageable, calm seas ensuring reliable Cat Ba Island ferry, fewer crowds, shoulder season pricing). June-August summer peak warmest (28-32°C) with highest rainfall (180-300mm July) but still acceptable if comfortable humidity and domestic tourist crowds. November-March winter coolest (15-22°C) with occasional cold spells (10-15°C), driest season (60-100mm) but rougher Cat Ba ferry seas (northeastern winds causing delays) and uncomfortable beach swimming.
Hai Phong experiences monsoon rain June-September (peak July 300mm monthly) but NOT extreme like southern Vietnam. Summer monsoon brings 180-300mm monthly concentrated rainfall brief afternoon thunderstorms, NOT all-day downpours. Total annual rainfall 1,600-2,000mm (moderate compared to southern regions’ 2,500mm+). Dry season November-January offers 60-100mm monthly (minimal rain). Key difference: Hai Phong’s subtropical northern climate creates four seasons with moderate monsoon, unlike southern Vietnam’s dramatic dry/wet binary pattern. Rain manageable year-round brief showers, NOT prohibitive
Hai Phong average temperature varies dramatically by season: 15-22°C winter (December-February coolest with occasional cold spells 10-15°C), 20-28°C spring/fall (March-May, September-October comfortable), 28-32°C summer (June-August warmest). Annual average ~24°C but this misleads seasonal range 15-32°C requires different clothing seasons. Northern Vietnam’s subtropical latitude creates genuine four-season climate unlike southern Vietnam’s consistent 26-30°C year-round. Pack warm layers November-March (cold spells common), light clothing April-October (warm to hot).
