Sanya weather in March
In March, Sanya sees average daytime highs of 25°C and overnight lows near 22°C, with 18 mm of rain across 3.8 wet days and about 11.9 hours of daylight. It is the 9th-warmest and 10th-wettest month of the year here.
Highs climb over the month, from about 24°C in the first days to 26°C by the end. The sky is clear or mostly clear about 43% of the time in March, and the air most often feels oppressive.
Daylight stretches from about 11 h 36 min at the start of March to 12 h 06 min by month's end. Set against the rest of the year, March is Sanya's 3rd-clearest and 6th-windiest month. For the whole year in context, see Sanya's year-round climate.
- Daytime high
- 25°
- 9th warmest
- Overnight low
- 22°
- 4th coldest
- Rainfall
- 18 mm
- 3.8 wet days
- Daylight
- 11 h 54 min
- 6:55 AM – 6:48 PM
- Cloud cover
- 48%
- 3rd clearest
- Wind
- 14 km/h
- 6th windiest
- Solar energy
- 5.28 kWh/m²
- Travel score
- 7.9
- out of 10
Sanya is prefecture-level city in Hainan, China.
- Air quality
- Elevated
- PM2.5 15.5 µg/m³ · 2018
- Density
- 537/km²
- people per km²
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in March
Highs climb over the month, from about 24°C in the first days to 26°C by the end.
A typical March day in Sanya reaches about 25°C in the afternoon and slips back to 22°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 27°C. Set against its neighbours, March runs about 2°C warmer than February and about 2°C cooler than April.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 24 | 24 | 24 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 |
| Avg low (°C) | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 23 | 23 | 23 | 23 | 23 | 23 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 24 | 21 |
| 2 | 24 | 21 |
| 3 | 24 | 21 |
| 4 | 25 | 21 |
| 5 | 25 | 21 |
| 6 | 25 | 21 |
| 7 | 25 | 21 |
| 8 | 25 | 21 |
| 9 | 25 | 21 |
| 10 | 25 | 21 |
| 11 | 25 | 21 |
| 12 | 25 | 21 |
| 13 | 25 | 21 |
| 14 | 25 | 22 |
| 15 | 25 | 22 |
| 16 | 25 | 22 |
| 17 | 25 | 22 |
| 18 | 26 | 22 |
| 19 | 26 | 22 |
| 20 | 26 | 22 |
| 21 | 26 | 22 |
| 22 | 26 | 22 |
| 23 | 26 | 22 |
| 24 | 26 | 22 |
| 25 | 26 | 22 |
| 26 | 26 | 23 |
| 27 | 26 | 23 |
| 28 | 26 | 23 |
| 29 | 26 | 23 |
| 30 | 26 | 23 |
| 31 | 26 | 23 |
How March really feels in Sanya
Once humidity and wind are folded in, March averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.
March sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Sanya weather by month
How March compares with the rest of the year at a glance. March is the 9th-warmest and 10th-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 23° / 19° | 12 | 2.3 | 11 | 8.2 |
| Feb | 24° / 19° | 10 | 2.5 | 11.4 | 8.2 |
| Mar | 25° / 22° | 18 | 3.8 | 11.9 | 7.9 |
| Apr | 28° / 24° | 53 | 8.6 | 12.4 | 6.6 |
| May | 29° / 26° | 139 | 19 | 12.8 | 4.3 |
| Jun | 30° / 27° | 212 | 22.2 | 13.1 | 3.4 |
| Jul | 29° / 26° | 280 | 23 | 13 | 3.6 |
| Aug | 29° / 26° | 261 | 24.4 | 12.6 | 3.5 |
| Sep | 29° / 26° | 258 | 22.3 | 12.1 | 3.8 |
| Oct | 28° / 24° | 182 | 14 | 11.6 | 5.7 |
| Nov | 26° / 22° | 54 | 5.6 | 11.1 | 7.5 |
| Dec | 24° / 19° | 26 | 3 | 10.9 | 8.2 |
Cloud cover in March
The sky is clear or mostly clear about 43% of the time in March.
Beyond those clear spells, partly cloudy skies cover about 25% of March, with mostly cloudy or overcast conditions the remaining 31%. Skies tend to cloud over as the month goes on.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 71 | 71 | 72 | 73 | 73 | 73 | 73 | 72 | 73 | 73 | 73 | 72 | 72 | 72 | 70 | 70 | 69 | 68 | 67 | 66 | 65 | 65 | 64 | 64 | 64 | 64 | 64 | 64 | 64 | 64 | 64 |
| Cloudier (%) | 29 | 29 | 28 | 27 | 27 | 27 | 27 | 28 | 27 | 27 | 27 | 28 | 28 | 28 | 30 | 30 | 31 | 32 | 33 | 34 | 35 | 35 | 36 | 36 | 36 | 36 | 36 | 36 | 36 | 36 | 36 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 71 | 29 |
| 2 | 71 | 29 |
| 3 | 72 | 28 |
| 4 | 73 | 27 |
| 5 | 73 | 27 |
| 6 | 73 | 27 |
| 7 | 73 | 27 |
| 8 | 72 | 28 |
| 9 | 73 | 27 |
| 10 | 73 | 27 |
| 11 | 73 | 27 |
| 12 | 72 | 28 |
| 13 | 72 | 28 |
| 14 | 72 | 28 |
| 15 | 70 | 30 |
| 16 | 70 | 30 |
| 17 | 69 | 31 |
| 18 | 68 | 32 |
| 19 | 67 | 33 |
| 20 | 66 | 34 |
| 21 | 65 | 35 |
| 22 | 65 | 35 |
| 23 | 64 | 36 |
| 24 | 64 | 36 |
| 25 | 64 | 36 |
| 26 | 64 | 36 |
| 27 | 64 | 36 |
| 28 | 64 | 36 |
| 29 | 64 | 36 |
| 30 | 64 | 36 |
| 31 | 64 | 36 |
Chance of precipitation in March
Sanya gets around 18 mm of rain over 3.8 wet days in March. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 12% and peaks near 20% on the wettest days. The odds climb toward the end of the month.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 10 | 10 | 11 | 11 | 12 | 13 | 13 | 14 | 15 | 15 | 16 | 17 | 17 | 18 | 18 | 19 | 19 | 20 |
| Rain chance (%) | |
|---|---|
| 1 | 9 |
| 2 | 9 |
| 3 | 9 |
| 4 | 9 |
| 5 | 9 |
| 6 | 9 |
| 7 | 9 |
| 8 | 9 |
| 9 | 9 |
| 10 | 9 |
| 11 | 9 |
| 12 | 9 |
| 13 | 9 |
| 14 | 10 |
| 15 | 10 |
| 16 | 11 |
| 17 | 11 |
| 18 | 12 |
| 19 | 13 |
| 20 | 13 |
| 21 | 14 |
| 22 | 15 |
| 23 | 15 |
| 24 | 16 |
| 25 | 17 |
| 26 | 17 |
| 27 | 18 |
| 28 | 18 |
| 29 | 19 |
| 30 | 19 |
| 31 | 20 |
Humidity in March
Most of March feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, March lands in the oppressive band about 48% of days. Sticky, muggy-or-worse air turns up on roughly 84% of them.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Comfortable (%) | 9 | 8 | 8 | 8 | 7 | 7 | 6 | 6 | 5 | 5 | 4 | 4 | 4 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 |
| Humid (%) | 18 | 18 | 18 | 17 | 17 | 16 | 16 | 15 | 14 | 13 | 12 | 11 | 10 | 10 | 9 | 8 | 7 | 7 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 5 | 5 | 5 | 5 | 5 |
| Muggy (%) | 44 | 44 | 44 | 44 | 44 | 44 | 44 | 43 | 43 | 42 | 42 | 41 | 41 | 40 | 39 | 37 | 36 | 35 | 33 | 31 | 30 | 28 | 27 | 25 | 24 | 23 | 22 | 21 | 20 | 19 | 19 |
| Oppressive (%) | 26 | 27 | 28 | 28 | 29 | 31 | 32 | 34 | 35 | 37 | 39 | 41 | 43 | 45 | 47 | 49 | 52 | 52 | 55 | 57 | 58 | 59 | 60 | 62 | 63 | 64 | 65 | 66 | 67 | 67 | 66 |
| Miserable (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 4 | 4 | 5 | 5 | 5 | 6 | 7 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | Miserable (%) | |
|---|---|---|---|---|---|---|
| 1 | 3 | 9 | 18 | 44 | 26 | 0 |
| 2 | 2 | 8 | 18 | 44 | 27 | 0 |
| 3 | 2 | 8 | 18 | 44 | 28 | 0 |
| 4 | 2 | 8 | 17 | 44 | 28 | 0 |
| 5 | 2 | 7 | 17 | 44 | 29 | 0 |
| 6 | 2 | 7 | 16 | 44 | 31 | 0 |
| 7 | 2 | 6 | 16 | 44 | 32 | 0 |
| 8 | 2 | 6 | 15 | 43 | 34 | 0 |
| 9 | 2 | 5 | 14 | 43 | 35 | 0 |
| 10 | 2 | 5 | 13 | 42 | 37 | 0 |
| 11 | 2 | 4 | 12 | 42 | 39 | 0 |
| 12 | 1 | 4 | 11 | 41 | 41 | 1 |
| 13 | 1 | 4 | 10 | 41 | 43 | 1 |
| 14 | 1 | 3 | 10 | 40 | 45 | 1 |
| 15 | 1 | 3 | 9 | 39 | 47 | 1 |
| 16 | 1 | 3 | 8 | 37 | 49 | 1 |
| 17 | 1 | 3 | 7 | 36 | 52 | 1 |
| 18 | 1 | 3 | 7 | 35 | 52 | 2 |
| 19 | 1 | 3 | 6 | 33 | 55 | 2 |
| 20 | 1 | 3 | 6 | 31 | 57 | 2 |
| 21 | 1 | 3 | 6 | 30 | 58 | 2 |
| 22 | 1 | 3 | 6 | 28 | 59 | 3 |
| 23 | 1 | 3 | 6 | 27 | 60 | 3 |
| 24 | 1 | 3 | 6 | 25 | 62 | 3 |
| 25 | 0 | 3 | 6 | 24 | 63 | 4 |
| 26 | 0 | 3 | 6 | 23 | 64 | 4 |
| 27 | 0 | 3 | 5 | 22 | 65 | 5 |
| 28 | 0 | 3 | 5 | 21 | 66 | 5 |
| 29 | 0 | 3 | 5 | 20 | 67 | 5 |
| 30 | 0 | 3 | 5 | 19 | 67 | 6 |
| 31 | 0 | 3 | 5 | 19 | 66 | 7 |
Wind in March
Winds average 14 km/h in March.
Across March, daily wind ranges from about 13 km/h on the calmest days to 14 km/h at its breeziest. It stays fairly steady from day to day.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 13 | 13 | 13 | 13 |
| Feels | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 14 | light breeze |
| 2 | 14 | light breeze |
| 3 | 14 | light breeze |
| 4 | 14 | light breeze |
| 5 | 14 | light breeze |
| 6 | 14 | light breeze |
| 7 | 14 | light breeze |
| 8 | 14 | light breeze |
| 9 | 14 | light breeze |
| 10 | 14 | light breeze |
| 11 | 14 | light breeze |
| 12 | 14 | light breeze |
| 13 | 14 | light breeze |
| 14 | 14 | light breeze |
| 15 | 14 | light breeze |
| 16 | 14 | light breeze |
| 17 | 14 | light breeze |
| 18 | 14 | light breeze |
| 19 | 14 | light breeze |
| 20 | 14 | light breeze |
| 21 | 14 | light breeze |
| 22 | 14 | light breeze |
| 23 | 14 | light breeze |
| 24 | 14 | light breeze |
| 25 | 14 | light breeze |
| 26 | 14 | light breeze |
| 27 | 14 | light breeze |
| 28 | 13 | light breeze |
| 29 | 13 | light breeze |
| 30 | 13 | light breeze |
| 31 | 13 | light breeze |
Sunrise & sunset in March
Daylight runs from about 11 h 36 min at the start of March to 12 h 06 min by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 30 minutes over March. Sunrise moves from 7:07 AM to 6:43 AM, and sunset from 6:44 PM to 6:51 PM.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 11.6 | 11.6 | 11.6 | 11.7 | 11.7 | 11.7 | 11.7 | 11.7 | 11.7 | 11.8 | 11.8 | 11.8 | 11.8 | 11.8 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 |
| Sunrise (AM) | 7:07 | 7:06 | 7:05 | 7:05 | 7:04 | 7:03 | 7:03 | 7:02 | 7:01 | 7:00 | 6:59 | 6:59 | 6:58 | 6:57 | 6:56 | 6:55 | 6:55 | 6:54 | 6:53 | 6:52 | 6:51 | 6:50 | 6:50 | 6:49 | 6:48 | 6:47 | 6:46 | 6:45 | 6:45 | 6:44 | 6:43 |
| Sunset (PM) | 6:44 | 6:44 | 6:44 | 6:45 | 6:45 | 6:45 | 6:45 | 6:46 | 6:46 | 6:46 | 6:47 | 6:47 | 6:47 | 6:47 | 6:48 | 6:48 | 6:48 | 6:48 | 6:48 | 6:49 | 6:49 | 6:49 | 6:49 | 6:50 | 6:50 | 6:50 | 6:50 | 6:50 | 6:51 | 6:51 | 6:51 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 11.6 | 7:07 | 6:44 |
| 2 | 11.6 | 7:06 | 6:44 |
| 3 | 11.6 | 7:05 | 6:44 |
| 4 | 11.7 | 7:05 | 6:45 |
| 5 | 11.7 | 7:04 | 6:45 |
| 6 | 11.7 | 7:03 | 6:45 |
| 7 | 11.7 | 7:03 | 6:45 |
| 8 | 11.7 | 7:02 | 6:46 |
| 9 | 11.7 | 7:01 | 6:46 |
| 10 | 11.8 | 7:00 | 6:46 |
| 11 | 11.8 | 6:59 | 6:47 |
| 12 | 11.8 | 6:59 | 6:47 |
| 13 | 11.8 | 6:58 | 6:47 |
| 14 | 11.8 | 6:57 | 6:47 |
| 15 | 11.9 | 6:56 | 6:48 |
| 16 | 11.9 | 6:55 | 6:48 |
| 17 | 11.9 | 6:55 | 6:48 |
| 18 | 11.9 | 6:54 | 6:48 |
| 19 | 11.9 | 6:53 | 6:48 |
| 20 | 11.9 | 6:52 | 6:49 |
| 21 | 12.0 | 6:51 | 6:49 |
| 22 | 12.0 | 6:50 | 6:49 |
| 23 | 12.0 | 6:50 | 6:49 |
| 24 | 12.0 | 6:49 | 6:50 |
| 25 | 12.0 | 6:48 | 6:50 |
| 26 | 12.0 | 6:47 | 6:50 |
| 27 | 12.1 | 6:46 | 6:50 |
| 28 | 12.1 | 6:45 | 6:50 |
| 29 | 12.1 | 6:45 | 6:51 |
| 30 | 12.1 | 6:44 | 6:51 |
| 31 | 12.1 | 6:43 | 6:51 |
Solar energy in March
Average shortwave solar energy reaching the ground each day in March, about 5.28 kWh/m².
For context, solar energy here swings from a low near 3.79 kWh/m² to a high of 5.82 kWh/m² in April across the year — March's 5.28 kWh/m² falls in the middle.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 4.9 | 4.9 | 5.0 | 5.0 | 5.0 | 5.1 | 5.1 | 5.1 | 5.2 | 5.2 | 5.2 | 5.2 | 5.2 | 5.3 | 5.3 | 5.3 | 5.3 | 5.3 | 5.3 | 5.3 | 5.4 | 5.4 | 5.4 | 5.4 | 5.4 | 5.4 | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 |
| Level | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 4.9 | Bright |
| 2 | 4.9 | Bright |
| 3 | 5.0 | Bright |
| 4 | 5.0 | Bright |
| 5 | 5.0 | Bright |
| 6 | 5.1 | Bright |
| 7 | 5.1 | Bright |
| 8 | 5.1 | Bright |
| 9 | 5.2 | Bright |
| 10 | 5.2 | Bright |
| 11 | 5.2 | Bright |
| 12 | 5.2 | Bright |
| 13 | 5.2 | Bright |
| 14 | 5.3 | Bright |
| 15 | 5.3 | Bright |
| 16 | 5.3 | Bright |
| 17 | 5.3 | Bright |
| 18 | 5.3 | Bright |
| 19 | 5.3 | Bright |
| 20 | 5.3 | Bright |
| 21 | 5.4 | Bright |
| 22 | 5.4 | Bright |
| 23 | 5.4 | Bright |
| 24 | 5.4 | Bright |
| 25 | 5.4 | Bright |
| 26 | 5.4 | Bright |
| 27 | 5.5 | Bright |
| 28 | 5.5 | Bright |
| 29 | 5.5 | Bright |
| 30 | 5.5 | Bright |
| 31 | 5.5 | Bright |
Hazard calendar for Sanya
In March, Sanya sits inside its pacific typhoon season. The full year is below, with each hazard's peak months called out.
Sanya sits in the Pacific typhoon belt; the season peaks July–October.
Sanya's monsoon runs May–October, when most of the year's rain falls.
Is March a good time to visit Sanya?
Our two travel scores rate March for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
March is one of the better times to visit Sanya for general sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Sanya in March
From March's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In March, Sanya sees daytime highs around 25°C and nights near 22°C. Worth packing: light clothes and sun protection. About 4 days see rain.
Sea temperature near Sanya in March
The nearest coast averages about 24°C in March — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 19 km away) is warmest in June at about 29°C and coldest in February near 23°C.
The water stays above 20°C all year — warm enough for a swim any month.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 23 | 23 | 24 | 26 | 28 | 29 | 29 | 29 | 29 | 28 | 26 | 25 |
| Comfort | Refreshing | Refreshing | Warm | Warm | Tropical | Tropical | Tropical | Tropical | Tropical | Warm | Warm | Warm |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 23 | Refreshing |
| Feb | 23 | Refreshing |
| Mar | 24 | Warm |
| Apr | 26 | Warm |
| May | 28 | Tropical |
| Jun | 29 | Tropical |
| Jul | 29 | Tropical |
| Aug | 29 | Tropical |
| Sep | 29 | Tropical |
| Oct | 28 | Warm |
| Nov | 26 | Warm |
| Dec | 25 | Warm |
UV index in Sanya in March
Clear-sky midday UV in March peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Sanya peaks around August 11 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 16 at about 7 (high).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 8 | 10 | 11 | 11 | 11 | 12 | 13 | 13 | 11 | 10 | 8 | 7 |
| Level | Very high | Very high | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Very high | High |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 8 | Very high |
| Feb | 10 | Very high |
| Mar | 11 | Extreme |
| Apr | 11 | Extreme |
| May | 11 | Extreme |
| Jun | 12 | Extreme |
| Jul | 13 | Extreme |
| Aug | 13 | Extreme |
| Sep | 11 | Extreme |
| Oct | 10 | Very high |
| Nov | 8 | Very high |
| Dec | 7 | High |
Air quality in Sanya in March
Average fine-particle pollution (PM2.5) through the year — so you can see where March falls, not just the annual average.
Air quality in Sanya is worst in December — around 23 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (August, 11 µg/m³).
Seasonal pattern from CAMS reanalysis, scaled to Sanya's WHO annual average of 15.5 µg/m³.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 20 | 19 | 17 | 15 | 11 | 12 | 11 | 11 | 11 | 18 | 18 | 23 |
| Level | Moderate | Moderate | Moderate | Moderate | Good | Good | Good | Good | Good | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 20 | Moderate |
| Feb | 19 | Moderate |
| Mar | 17 | Moderate |
| Apr | 15 | Moderate |
| May | 11 | Good |
| Jun | 12 | Good |
| Jul | 11 | Good |
| Aug | 11 | Good |
| Sep | 11 | Good |
| Oct | 18 | Moderate |
| Nov | 18 | Moderate |
| Dec | 23 | Moderate |
Where is Sanya?
Sanya sits at 18.3°N, 109.5°E, 1 m above sea level, in China. The nearest listed city is An Hải, 278 km away.
Topography around Sanya
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Sanya.
Within 3 km, the terrain around Sanya has only modest variations in elevation — a maximum elevation change of 203 m around an average of 24 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 610 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,775 m.
The land around Sanya is covered by trees (42%), artificial surfaces (32%) and water (22%) within 3 km, water (45%) and trees (41%) within 16 km, and trees (50%) and water (45%) within 80 km.
China travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type A / I
- 220 V · 50 Hz
- Prices
- ≈ 47% of US
- price level, 2025
- GDP per capita
- $13,862
- 2025
- Happiness
- 6.1 / 10
- World Happiness, 2025
- Homicide rate
- 0.5
- per 100k, 2020
- Road deaths
- 17.4
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- Low
- EF EPI 464
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Sanya (18.2543°, 109.5095°, elevation 1 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).