When winter chills the landscapes of Russia, Central Asia, and northern China, the Hainan Sea stays warm, calm, and inviting. With sea temperatures ranging from 23°C to 26°C, Hainan becomes the ideal destination for those seeking both relaxation and tropical adventure between October and March.
Whether you’re in the mood to surf, snorkel, sail, or simply soak in the sunshine, here’s how to make the most of the Hainan Sea during its best season — the dry winter months.
1. Surfing the Winter Swells
Best Surf Spots: Houhai Beach, Riyue Bay, Shimei Bay
Surf Season: November to March
Sea Temperature: 23–25°C
Why Go: Hainan’s east coast receives steady and consistent swells during winter, making it ideal for beginners and experienced surfers alike. Wetsuits are optional but recommended for January and February.
Tip: Surf schools are available with English, Russian, and Chinese-speaking instructors.
2. Snorkeling & Diving in Tropical Waters
Best Spots: Wuzhizhou Island, Boundary Island, West Island
Best Months: October to March Sea Temperature: 24–26°C (Oct–Nov), 23–24°C (Dec–Feb)
Why Go: Clear visibility, vibrant coral reefs, and tropical marine life await. Water remains swimmable even in winter, especially on sunny days. Tip: Short wetsuits are available for rent at most dive centers.
3. Yacht Cruises & Sunset Sailing
Best Locations: Sanya Bay, Yalong Bay, Clearwater Bay Sea Temperature: 24–25°C
Experience: Enjoy champagne sunsets, swim in open waters, and capture panoramic views of Hainan’s tropical coastline. Tip: Book a private sailing tour for a romantic or VIP experience.
4. Jet Skiing, Banana Boats & Flyboarding
Available At: Dadonghai, Sanya Bay, Wuzhizhou Island
Sea Temperature: 23–25°C Why Go: Enjoy high-energy water fun in comfortably warm water. Ideal for adrenaline seekers and beach groups. Tip: Many activity centers offer packages for groups or families.
5. Island Hopping & Day Tours
Must-Visit Islands: Wuzhizhou, West Island, Nanwan Monkey Island Sea Temperature: 24°C (Nov), 23°C (Jan)
Why Go: Discover marine parks, local wildlife, and scenic boat rides. Dry season brings calm seas, perfect for smooth sailing and scenic views. Tip: Join small group tours to enjoy a mix of nature, culture, and relaxation.
6. Coastal Wellness & Ocean Meditation
Wellness Spots: Yalong Bay, Shimei Bay, Clearwater Bay Conditions: Ideal for sunrise yoga and paddleboard meditation
Why Go: Even if you’re not swimming daily in January, the ocean air and scenery provide powerful wellness benefits. Tip: Many beach resorts offer morning wellness classes and guided meditation.
7. Sea Culture & Traditional Fishing
Cultural Harbors: Yazhou Port, Lingshui, Bo’ao Why Go: Experience traditional Hainanese fishing life—join locals at sea, learn net-casting, and enjoy your catch with a seaside BBQ. Tip: Combine this experience with a visit to a fishing village or seafood market.
Hainan Sea Temperatures – Month by Month
| Month | Avg Air Temp | Sea Temp | What to Expect |
|---|---|---|---|
| October | 26–30°C | ~26°C | Excellent visibility, warm water |
| November | 24–28°C | ~25°C | Ideal for all water sports |
| December | 22–27°C | ~24°C | Comfortable for snorkeling & sailing |
| January | 20–26°C | ~23°C | Cooler air, great for surfing |
| February | 21–27°C | ~23–24°C | Great for tours, wetsuits optional |
| March | 23–29°C | ~25°C | Warm water returns, perfect conditions |
Good to know: Even in January, Hainan’s sea is warmer than many southern European beaches in summer!
Summary: Winter Activities on the Hainan Sea
| Activity | Sea Temp Comfort | Best Months | Recommended For |
|---|---|---|---|
| Surfing | ★★★★☆ (23–25°C) | Nov–Mar | Active travelers |
| Snorkeling & Diving | ★★★★★ (24–26°C) | Oct–Feb | Couples, families |
| Yacht Sailing | ★★★★★ (24–25°C) | All | Luxury holiday-goers |
| Jet Ski & Water Fun | ★★★★☆ (23–25°C) | Oct–Mar | Friends, groups |
| Island Day Trips | ★★★★☆ (23–24°C) | Oct–Mar | Nature lovers, all ages |
| Wellness Activities | ★★★★★ (Beachfront) | Oct–Mar | Yoga & retreats |
| Fishing Tours | ★★★★★ | Oct–Mar | Cultural explorers |
Final Thoughts
From surfing glassy waves to sailing into fiery sunsets, the Hainan Sea is your tropical playground all winter long. With warm water temperatures, consistent sunshine, and endless water activities, even January feels like summer here.
Whether you’re chasing adrenaline or inner peace, Hainan’s ocean delivers a world-class beach holiday — no winter coat required.