Anse Chastanet Water Temperature
Updated Fri 05:56 (America/St_Lucia)
Saint Lucia · Forecast updated Sep 25, 2026, 05:56 UTC
Current Sea Temperature
29.7°C
85.5°F
Very warm water
Valid Sep 25, 2026, 05:56 (America/St_Lucia). Source: stored Open-Meteo marine forecast. Temperature is not a safety rating or snorkel score.
Versus this month's average
0.5°C below
The typical September average is 30.2°C (86.4°F) from the historical baseline.
Recent trend
Holding fairly steady
Seven-day average: 29.6°C, versus 29.5°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 Anse Chastanet, typical monthly averages range from about 27.2°C (81.0°F) in February to 30.2°C (86.4°F) in September.
Over the past 30 days, the average sea temperature in Anse Chastanet has been 29.5°C.
Historical baseline (full year)
Northern Hemisphere. Summer is generally June–August; winter is December–February.
Typical monthly sea-surface temperature near Anse Chastanet, calculated from hourly observations for 2023–2025. This is not this site's forecast archive.
| Month | Typical range | Average |
|---|---|---|
| January | 26.9–28.0°C | 27.6°C / 81.7°F |
| February | 26.5–27.9°C | 27.2°C / 81.0°F |
| March | 26.8–28.2°C | 27.5°C / 81.5°F |
| April | 27.2–28.6°C | 27.9°C / 82.2°F |
| May | 28.0–29.0°C | 28.5°C / 83.3°F |
| June | 28.1–29.1°C | 28.7°C / 83.7°F |
| July | 28.6–29.3°C | 28.9°C / 84.0°F |
| August | 29.2–29.9°C | 29.6°C / 85.3°F |
| September | 29.9–30.5°C | 30.2°C / 86.4°F |
| October | 29.7–30.4°C | 30.1°C / 86.2°F |
| November | 28.8–29.7°C | 29.2°C / 84.6°F |
| December | 27.9–28.7°C | 28.3°C / 82.9°F |
Source: Open-Meteo Marine API, MeteoFrance sea-surface temperature dataset. Nearest sea grid cell (13.88, -61.12). 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.
Anse Chastanet in January
Typical January water temperature near Anse Chastanet is 27.6°C (81.7°F), with yearly monthly means from 26.9–28.0°C.
Anse Chastanet in February
Typical February water temperature near Anse Chastanet is 27.2°C (81.0°F), with yearly monthly means from 26.5–27.9°C.
Anse Chastanet in March
Typical March water temperature near Anse Chastanet is 27.5°C (81.5°F), with yearly monthly means from 26.8–28.2°C.
Anse Chastanet in April
Typical April water temperature near Anse Chastanet is 27.9°C (82.2°F), with yearly monthly means from 27.2–28.6°C.
Anse Chastanet in May
Typical May water temperature near Anse Chastanet is 28.5°C (83.3°F), with yearly monthly means from 28.0–29.0°C.
Anse Chastanet in June
Typical June water temperature near Anse Chastanet is 28.7°C (83.7°F), with yearly monthly means from 28.1–29.1°C.
Anse Chastanet in July
Typical July water temperature near Anse Chastanet is 28.9°C (84.0°F), with yearly monthly means from 28.6–29.3°C.
Anse Chastanet in August
Typical August water temperature near Anse Chastanet is 29.6°C (85.3°F), with yearly monthly means from 29.2–29.9°C.
Anse Chastanet in September
Typical September water temperature near Anse Chastanet is 30.2°C (86.4°F), with yearly monthly means from 29.9–30.5°C.
Anse Chastanet in October
Typical October water temperature near Anse Chastanet is 30.1°C (86.2°F), with yearly monthly means from 29.7–30.4°C.
Anse Chastanet in November
Typical November water temperature near Anse Chastanet is 29.2°C (84.6°F), with yearly monthly means from 28.8–29.7°C.
Anse Chastanet in December
Typical December water temperature near Anse Chastanet is 28.3°C (82.9°F), with yearly monthly means from 27.9–28.7°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 | 27.9°C / 82.2°F | 28.2°C / 82.7°F | 28.5°C / 83.3°F |
| July | 28.1°C / 82.6°F | 28.4°C / 83.1°F | 29.1°C / 84.4°F |
| August | 28.3°C / 82.9°F | 29.0°C / 84.3°F | 29.8°C / 85.6°F |
| September | 29.1°C / 84.4°F | 29.5°C / 85.1°F | 30.1°C / 86.2°F |
Partial coverage: 4 calendar months with records. Profile calculated from 2798 hourly forecast records across 4 monthly periods. This is a growing archive, not a long-term climate normal.
About the water at Anse Chastanet
Marine-reserve reef beneath the Pitons, snorkelable straight off the beach.
- Area
- Soufrière
Anse Chastanet Water Temperature: Common Questions
What is the water temperature in Anse Chastanet today?
The current sea surface temperature near Anse Chastanet is 29.7°C (85.5°F). Over the last 30 days, the average has been 29.5°C.
When is the water warmest in Anse Chastanet?
The water is typically warmest in September, at around 30.2°C (86.4°F) in the 2023–2025 historical baseline.
When is the water coldest in Anse Chastanet?
The water is typically coldest in February, at around 27.2°C (81.0°F) in the same historical baseline.
Can you swim in Anse Chastanet today?
At 29.7°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 Anse Chastanet.
View Snorkel Forecast →