Railay Sea Temperature
Thailand · Forecast updated Jul 15, 2026, 06:23 UTC · refresh delayed
Current Sea Temperature
30.5°C
86.9°F
Very warm water
Versus this month's average
Close to average
The July average in our archive is 30.4°C (86.6°F).
Recent trend
Holding fairly steady
Seven-day average: 30.4°C, versus 30.3°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 mean the sea is safe.
Sea Surface Temperature Over the Year
In the data collected for Railay, monthly averages range from about 30.4°C (86.6°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 | 30.4°C / 86.6°F | 30.8°C / 87.4°F |
Profile calculated from 1071 hourly forecast records across 2 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 30.5°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 30.4°C (86.6°F).
Can you swim in Railay today?
Yes — at 30.5°C the water is warm enough for comfortable 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 →