What is the Ocean Viewing Index (OVI) for Chaweng Beach?

OVI is a 0-100 composite score combining sea color, water clarity, visibility, sea conditions, sunlight and water quality to help you decide if the sea is worth seeing today.

Chaweng Beach

Surat Thani, ThailandAsia/Bangkok

Ocean View Index

68Good

Next tide

—

Sunrise / Sunset

23:23 – 11:37

Local time

01:14

Koh Samui's longest and liveliest beach, Chaweng unfurls seven kilometres of white sand embraced by coconut palms.

Ocean Viewing Index

Updated · Sep 8, 2026 18:14

Reference time: local noon · 12:30 (Asia/Bangkok)

Estimated

Good

Good conditions. Worth a visit.

Sub-Index Breakdown

Six dimensions feed the overall Ocean Viewing Index.

Sea Color
Vivid turquoise / azure · hue
80.7
Clarity
Very clear (below 1.5 NTU) · NTU
100
Visibility
Under 8 m · m
21.1
Sea State
Calm, glassy (0-1) · Beaufort
100
Lighting
Low / harsh light · lux
44
Water Quality
index
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Weather Forecast

7-day marine weather forecast from Open-Meteo model.

TodaySep 8

Rain

33°25°

4.0 m/s

6.8mm

WedSep 9

Thunderstorm

32°25°

3.2 m/s

13.8mm

ThuSep 10

Rain

30°25°

3.5 m/s

25.2mm

FriSep 11

Thunderstorm

27°24°

3.8 m/s

51.3mm

SatSep 12

Rain

27°25°

4.8 m/s

37.5mm

SunSep 13

Rain

26°24°

4.7 m/s

37.7mm

MonSep 14

Rain

27°25°

5.8 m/s

19.1mm

Visibility: 19 km·Cloud: 88%

48-Hour Hourly Forecast

Hour-by-hour marine weather for the next 48 hours.

Now28°40.2

01:0029°4—

02:0030°4—

03:0031°5—

04:0032°5—

05:0032°5—

06:0033°4—

07:0033°50.5

08:0032°50.4

09:0031°60.1

10:0031°5—

11:0029°6—

12:0029°5—

13:0029°50.1

14:0029°40.1

15:0028°40.1

16:0028°40.2

17:0028°40.2

18:0027°40.2

19:0025°23.1

20:0025°11.1

21:0026°20.4

22:0026°30.1

23:0026°2—

00:0027°4—

01:0027°30.2

02:0028°40.5

03:0029°3—

04:0031°3—

05:0031°3—

06:0032°4—

07:0032°40.1

08:0028°32.4

09:0027°31.3

10:0027°30.1

11:0027°3—

12:0027°30.1

13:0027°30.2

14:0027°20.1

15:0026°30.7

16:0026°30.5

17:0026°40.5

18:0026°40.9

19:0026°20.7

20:0026°30.2

21:0026°30.1

22:0025°32.6

23:0025°42.6

7-Day OVI Trend

Forecast ocean viewing conditions for the coming week.

Best on Wed: Viewing conditions are Excellent; aim for the golden hour just after sunrise or before sunset. Great for snorkeling and photography.

High & Low Tides Today

Times and heights of today's high and low water.

Spring TideCoefficient: 116.4 / 120Higher coefficient means larger tide range; 120 is the largest spring, 20 the smallest neap.

Time	Type	Height
No tide extremes recorded today.

48-Hour OVI Trend

Hour-by-hour ocean viewing outlook for the next 48 hours, dampened by rainfall.

Today's Tide Summary

A quick look at the day's high and low water.

Nearby Beaches

Other beaches closest to Chaweng Beach.

218 km away

Ao Nang Beach

Krabi, Thailand

266 km away

Patong Beach

Phuket, Thailand

272 km away

Kata Beach

Phuket, Thailand

338 km away

Hua Hin Beach

Prachuap Khiri Khan, Thailand

Frequently asked questions

What is the Ocean Viewing Index (OVI) for Chaweng Beach?: OVI is a 0-100 composite score combining sea color, water clarity, visibility, sea conditions, sunlight and water quality to help you decide if the sea is worth seeing today.

Essential Information

Coordinates: 9.5333°, 100.0667°
Timezone: Asia/Bangkok
Region & Country: Surat Thani, Thailand

Data sources

Tides: UHSLC / FES2022b · Weather: NOAA GFS · Sea color: NASA MODIS/VIIRS