Surin Islands Water Temperature
Updated Tue 10:06 (Asia/Bangkok)
Thailand · Forecast updated Sep 22, 2026, 10:06 UTC
Current Sea Temperature
29.0°C
84.2°F
Very warm water
Valid Sep 22, 2026, 10:06 (Asia/Bangkok). Source: stored Open-Meteo marine forecast. Temperature is not a safety rating or snorkel score.
Versus this month's average
0.4°C above
The typical September average is 28.6°C (83.5°F) from the historical baseline.
Recent trend
Holding fairly steady
Seven-day average: 28.9°C, versus 29.0°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 Surin Islands, typical monthly averages range from about 28.5°C (83.3°F) in January to 30.7°C (87.3°F) in May.
Over the past 30 days, the average sea temperature in Surin Islands has been 28.9°C.
Historical baseline (full year)
Northern Hemisphere. Summer is generally June–August; winter is December–February.
Typical monthly sea-surface temperature near Surin Islands, calculated from hourly observations for 2023–2025. This is not this site's forecast archive.
| Month | Typical range | Average |
|---|---|---|
| January | 28.2–28.6°C | 28.5°C / 83.3°F |
| February | 28.8–29.0°C | 28.9°C / 84.0°F |
| March | 29.4–29.9°C | 29.7°C / 85.5°F |
| April | 30.1–31.0°C | 30.5°C / 86.9°F |
| May | 30.0–31.4°C | 30.7°C / 87.3°F |
| June | 29.3–30.3°C | 29.7°C / 85.5°F |
| July | 29.0–29.5°C | 29.3°C / 84.7°F |
| August | 29.1–29.8°C | 29.3°C / 84.7°F |
| September | 28.4–28.8°C | 28.6°C / 83.5°F |
| October | 28.9–29.5°C | 29.2°C / 84.6°F |
| November | 28.4–29.6°C | 29.2°C / 84.6°F |
| December | 28.5–29.1°C | 28.7°C / 83.7°F |
Source: Open-Meteo Marine API, MeteoFrance sea-surface temperature dataset. Nearest sea grid cell (9.46, 97.88). 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.
Surin Islands in January
Typical January water temperature near Surin Islands is 28.5°C (83.3°F), with yearly monthly means from 28.2–28.6°C.
Surin Islands in February
Typical February water temperature near Surin Islands is 28.9°C (84.0°F), with yearly monthly means from 28.8–29.0°C.
Surin Islands in March
Typical March water temperature near Surin Islands is 29.7°C (85.5°F), with yearly monthly means from 29.4–29.9°C.
Surin Islands in April
Typical April water temperature near Surin Islands is 30.5°C (86.9°F), with yearly monthly means from 30.1–31.0°C.
Surin Islands in May
Typical May water temperature near Surin Islands is 30.7°C (87.3°F), with yearly monthly means from 30.0–31.4°C.
Surin Islands in June
Typical June water temperature near Surin Islands is 29.7°C (85.5°F), with yearly monthly means from 29.3–30.3°C.
Surin Islands in July
Typical July water temperature near Surin Islands is 29.3°C (84.7°F), with yearly monthly means from 29.0–29.5°C.
Surin Islands in August
Typical August water temperature near Surin Islands is 29.3°C (84.7°F), with yearly monthly means from 29.1–29.8°C.
Surin Islands in September
Typical September water temperature near Surin Islands is 28.6°C (83.5°F), with yearly monthly means from 28.4–28.8°C.
Surin Islands in October
Typical October water temperature near Surin Islands is 29.2°C (84.6°F), with yearly monthly means from 28.9–29.5°C.
Surin Islands in November
Typical November water temperature near Surin Islands is 29.2°C (84.6°F), with yearly monthly means from 28.4–29.6°C.
Surin Islands in December
Typical December water temperature near Surin Islands is 28.7°C (83.7°F), with yearly monthly means from 28.5–29.1°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 | 29.0°C / 84.2°F | 29.5°C / 85.1°F | 30.4°C / 86.7°F |
| July | 28.9°C / 84.0°F | 29.3°C / 84.8°F | 29.7°C / 85.5°F |
| August | 28.7°C / 83.7°F | 29.0°C / 84.1°F | 29.4°C / 84.9°F |
| September | 28.5°C / 83.3°F | 28.9°C / 84.0°F | 29.3°C / 84.7°F |
Partial coverage: 4 calendar months with records. Profile calculated from 2731 hourly forecast records across 4 monthly periods. This is a growing archive, not a long-term climate normal.
About the water at Surin Islands
Remote Andaman islands with some of Thailand's best shallow coral gardens.
- Area
- Phang Nga
Surin Islands Water Temperature: Common Questions
What is the water temperature in Surin Islands today?
The current sea surface temperature near Surin Islands is 29.0°C (84.2°F). Over the last 30 days, the average has been 28.9°C.
When is the water warmest in Surin Islands?
The water is typically warmest in May, at around 30.7°C (87.3°F) in the 2023–2025 historical baseline.
When is the water coldest in Surin Islands?
The water is typically coldest in January, at around 28.5°C (83.3°F) in the same historical baseline.
Can you swim in Surin Islands today?
At 29.0°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 Surin Islands.
View Snorkel Forecast →