Railay Sea Temperature
Updated Sat 13:34 (Asia/Bangkok)
Thailand · Forecast updated Aug 8, 2026, 13:34 UTC
Current Sea Temperature
30.7°C
87.3°F
Very warm water
Versus this month's average
Close to average
The August average in our archive is 30.7°C (87.3°F).
Recent trend
Warming by 0.4°C
Seven-day average: 30.8°C, versus 30.4°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.
Sea Surface Temperature Over the Year
In the data collected for Railay, monthly averages range from about 30.5°C (86.9°F) in July to 30.7°C (87.2°F) in June.
Over the past 30 days, the average sea temperature in Railay has been 30.7°C.
Monthly Water Temperature Averages
| Month | Min | Average | Max |
|---|---|---|---|
| June | 29.7°C / 85.5°F | 30.7°C / 87.2°F | 31.4°C / 88.5°F |
| July | 29.9°C / 85.8°F | 30.5°C / 86.9°F | 31.3°C / 88.3°F |
| August | 30.1°C / 86.2°F | 30.7°C / 87.3°F | 31.2°C / 88.2°F |
Profile calculated from 1654 hourly forecast records across 3 monthly periods. This is a growing archive, not a long-term climate normal.
About the water at Railay
Limestone peninsula with sheltered bays and reef around the cliffs.
- Area
- Krabi
Railay Water Temperature: Common Questions
What is the sea temperature in Railay today?
The current sea surface temperature in Railay is 30.7°C. Over the last 30 days, the average has been 30.7°C.
When is the water warmest in Railay?
The warmest monthly average in the Railay archive is June, at around 30.7°C (87.2°F).
When is the water coldest in Railay?
The coldest monthly average in the archive is July, at around 30.5°C (86.9°F).
Can you swim in Railay today?
At 30.7°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 Railay.
View Snorkel Forecast →