Koh Kradan Water Temperature
Updated Tue 11:20 (Asia/Bangkok)
Thailand · Forecast updated Sep 22, 2026, 11:20 UTC
Current Sea Temperature
30.6°C
87.1°F
Very warm water
Valid Sep 22, 2026, 11:20 (Asia/Bangkok). Source: stored Open-Meteo marine forecast. Temperature is not a safety rating or snorkel score.
Versus this month's average
0.7°C above
The typical September average is 29.9°C (85.8°F) from the historical baseline.
Recent trend
Holding fairly steady
Seven-day average: 30.4°C, versus 30.5°C in the prior seven days.
What to wear
Very warm water
Swimwear is usually enough; a rash guard adds sun protection.
Cold tolerance varies. Wind, session length, sunshine, and exertion also affect comfort; temperature alone does not describe sea conditions or replace the snorkel forecast.
Typical Sea Temperature Over the Year
In the historical baseline for Koh Kradan, typical monthly averages range from about 28.9°C (84.0°F) in January to 31.2°C (88.2°F) in May.
Over the past 30 days, the average sea temperature in Koh Kradan has been 30.7°C.
Historical baseline (full year)
Northern Hemisphere. Summer is generally June–August; winter is December–February.
Typical monthly sea-surface temperature near Koh Kradan, calculated from hourly observations for 2023–2025. This is not this site's forecast archive.
| Month | Typical range | Average |
|---|---|---|
| January | 28.7–29.2°C | 28.9°C / 84.0°F |
| February | 29.1–29.3°C | 29.2°C / 84.6°F |
| March | 29.4–30.4°C | 30.0°C / 86.0°F |
| April | 30.6–31.6°C | 31.0°C / 87.8°F |
| May | 30.8–31.7°C | 31.2°C / 88.2°F |
| June | 30.4–30.9°C | 30.7°C / 87.3°F |
| July | 30.2–30.7°C | 30.5°C / 86.9°F |
| August | 30.2–30.7°C | 30.5°C / 86.9°F |
| September | 29.7–30.2°C | 29.9°C / 85.8°F |
| October | 29.7–30.2°C | 30.0°C / 86.0°F |
| November | 28.9–30.1°C | 29.7°C / 85.5°F |
| December | 29.0–29.6°C | 29.2°C / 84.6°F |
Source: Open-Meteo Marine API, MeteoFrance sea-surface temperature dataset. Nearest sea grid cell (7.29, 99.21). Each month is the mean of yearly monthly means; the range is the lowest and highest of those yearly monthly means. Open-Meteo methodology.
Water temperature by month
Each month uses the 2023–2025 baseline. The range is the lowest and highest yearly monthly mean, not an hourly extreme.
Koh Kradan in January
Typical January water temperature near Koh Kradan is 28.9°C (84.0°F), with yearly monthly means from 28.7–29.2°C.
Koh Kradan in February
Typical February water temperature near Koh Kradan is 29.2°C (84.6°F), with yearly monthly means from 29.1–29.3°C.
Koh Kradan in March
Typical March water temperature near Koh Kradan is 30.0°C (86.0°F), with yearly monthly means from 29.4–30.4°C.
Koh Kradan in April
Typical April water temperature near Koh Kradan is 31.0°C (87.8°F), with yearly monthly means from 30.6–31.6°C.
Koh Kradan in May
Typical May water temperature near Koh Kradan is 31.2°C (88.2°F), with yearly monthly means from 30.8–31.7°C.
Koh Kradan in June
Typical June water temperature near Koh Kradan is 30.7°C (87.3°F), with yearly monthly means from 30.4–30.9°C.
Koh Kradan in July
Typical July water temperature near Koh Kradan is 30.5°C (86.9°F), with yearly monthly means from 30.2–30.7°C.
Koh Kradan in August
Typical August water temperature near Koh Kradan is 30.5°C (86.9°F), with yearly monthly means from 30.2–30.7°C.
Koh Kradan in September
Typical September water temperature near Koh Kradan is 29.9°C (85.8°F), with yearly monthly means from 29.7–30.2°C.
Koh Kradan in October
Typical October water temperature near Koh Kradan is 30.0°C (86.0°F), with yearly monthly means from 29.7–30.2°C.
Koh Kradan in November
Typical November water temperature near Koh Kradan is 29.7°C (85.5°F), with yearly monthly means from 28.9–30.1°C.
Koh Kradan in December
Typical December water temperature near Koh Kradan is 29.2°C (84.6°F), with yearly monthly means from 29.0–29.6°C.
Forecast archive (growing)
These values come from hourly forecasts SnorkelForecast has stored. They cover only months with records and do not replace the historical baseline.
| Month | Min | Average | Max |
|---|---|---|---|
| June | 29.8°C / 85.6°F | 30.7°C / 87.3°F | 31.5°C / 88.7°F |
| July | 30.2°C / 86.4°F | 30.7°C / 87.3°F | 31.4°C / 88.5°F |
| August | 30.4°C / 86.7°F | 30.9°C / 87.6°F | 31.5°C / 88.7°F |
| September | 30.1°C / 86.2°F | 30.6°C / 87.1°F | 31.2°C / 88.2°F |
Partial coverage: 4 calendar months with records. Profile calculated from 2732 hourly forecast records across 4 monthly periods. This is a growing archive, not a long-term climate normal.
About the water at Koh Kradan
Andaman island with a long fringing reef snorkelable straight off the sand.
- Area
- Trang
Koh Kradan Water Temperature: Common Questions
What is the water temperature in Koh Kradan today?
The current sea surface temperature near Koh Kradan is 30.6°C (87.1°F). Over the last 30 days, the average has been 30.7°C.
When is the water warmest in Koh Kradan?
The water is typically warmest in May, at around 31.2°C (88.2°F) in the 2023–2025 historical baseline.
When is the water coldest in Koh Kradan?
The water is typically coldest in January, at around 28.9°C (84.0°F) in the same historical baseline.
Can you swim in Koh Kradan today?
At 30.6°C, the water is usually comfortable for swimming and snorkeling.
Full Snorkeling Forecast
See how today's sea temperature, wave height, wind, and tides combine into a detailed snorkeling score for Koh Kradan.
View Snorkel Forecast →