To Sua Water Temperature
Updated Tue 14:55 (Pacific/Apia)
Samoa · Forecast updated Sep 22, 2026, 14:55 UTC · refresh delayed
Current Sea Temperature
27.9°C
82.2°F
Warm water
Valid Sep 22, 2026, 14:55 (Pacific/Apia). Source: stored Open-Meteo marine forecast. Temperature is not a safety rating or snorkel score.
Versus this month's average
Close to average
The typical September average is 28.0°C (82.4°F) from the historical baseline.
Recent trend
Warming by 0.3°C
Seven-day average: 28.0°C, versus 27.8°C in the prior seven days.
What to wear
Warm water
Most people are comfortable in swimwear or a light rash guard.
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 To Sua, typical monthly averages range from about 28.0°C (82.4°F) in September to 30.0°C (86.0°F) in March.
Over the past 30 days, the average sea temperature in To Sua has been 27.5°C.
Historical baseline (full year)
Southern Hemisphere. Summer is generally December–February; winter is June–August.
Typical monthly sea-surface temperature near To Sua, calculated from hourly observations for 2023–2025. This is not this site's forecast archive.
| Month | Typical range | Average |
|---|---|---|
| January | 29.4–30.2°C | 29.8°C / 85.6°F |
| February | 29.7–30.0°C | 29.9°C / 85.8°F |
| March | 29.6–30.6°C | 30.0°C / 86.0°F |
| April | 29.8–30.2°C | 30.0°C / 86.0°F |
| May | 29.2–30.2°C | 29.6°C / 85.3°F |
| June | 28.8–29.1°C | 29.0°C / 84.2°F |
| July | 28.3–28.5°C | 28.4°C / 83.1°F |
| August | 27.6–28.5°C | 28.1°C / 82.6°F |
| September | 27.8–28.3°C | 28.0°C / 82.4°F |
| October | 28.1–28.3°C | 28.2°C / 82.8°F |
| November | 28.5–29.0°C | 28.8°C / 83.8°F |
| December | 29.0–29.8°C | 29.4°C / 84.9°F |
Source: Open-Meteo Marine API, MeteoFrance sea-surface temperature dataset. Nearest sea grid cell (-14.04, -171.46). 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.
To Sua in January
Typical January water temperature near To Sua is 29.8°C (85.6°F), with yearly monthly means from 29.4–30.2°C.
To Sua in February
Typical February water temperature near To Sua is 29.9°C (85.8°F), with yearly monthly means from 29.7–30.0°C.
To Sua in March
Typical March water temperature near To Sua is 30.0°C (86.0°F), with yearly monthly means from 29.6–30.6°C.
To Sua in April
Typical April water temperature near To Sua is 30.0°C (86.0°F), with yearly monthly means from 29.8–30.2°C.
To Sua in May
Typical May water temperature near To Sua is 29.6°C (85.3°F), with yearly monthly means from 29.2–30.2°C.
To Sua in June
Typical June water temperature near To Sua is 29.0°C (84.2°F), with yearly monthly means from 28.8–29.1°C.
To Sua in July
Typical July water temperature near To Sua is 28.4°C (83.1°F), with yearly monthly means from 28.3–28.5°C.
To Sua in August
Typical August water temperature near To Sua is 28.1°C (82.6°F), with yearly monthly means from 27.6–28.5°C.
To Sua in September
Typical September water temperature near To Sua is 28.0°C (82.4°F), with yearly monthly means from 27.8–28.3°C.
To Sua in October
Typical October water temperature near To Sua is 28.2°C (82.8°F), with yearly monthly means from 28.1–28.3°C.
To Sua in November
Typical November water temperature near To Sua is 28.8°C (83.8°F), with yearly monthly means from 28.5–29.0°C.
To Sua in December
Typical December water temperature near To Sua is 29.4°C (84.9°F), with yearly monthly means from 29.0–29.8°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 | 28.2°C / 82.8°F | 28.7°C / 83.7°F | 29.3°C / 84.7°F |
| July | 27.1°C / 80.8°F | 27.6°C / 81.7°F | 28.3°C / 82.9°F |
| August | 26.6°C / 79.9°F | 26.9°C / 80.5°F | 27.4°C / 81.3°F |
| September | 27.0°C / 80.6°F | 27.7°C / 81.8°F | 28.4°C / 83.1°F |
Partial coverage: 4 calendar months with records. Profile calculated from 2735 hourly forecast records across 4 monthly periods. This is a growing archive, not a long-term climate normal.
About the water at To Sua
Famous swimming hole and nearby reef-fringed coast with clear shallows.
- Area
- Upolu
To Sua Water Temperature: Common Questions
What is the water temperature in To Sua today?
The current sea surface temperature near To Sua is 27.9°C (82.2°F). Over the last 30 days, the average has been 27.5°C.
When is the water warmest in To Sua?
The water is typically warmest in March, at around 30.0°C (86.0°F) in the 2023–2025 historical baseline.
When is the water coldest in To Sua?
The water is typically coldest in September, at around 28.0°C (82.4°F) in the same historical baseline.
Can you swim in To Sua today?
At 27.9°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 To Sua.
View Snorkel Forecast →