Month-specific sea-surface temperature · Saint Lucia

Anse Chastanet Sea Temperature in March

27.5°C

81.5°F

In March, sea-surface temperature near Anse Chastanet has a historical monthly average of 27.5°C. This is not the reading for any particular holiday date.

Across 2023–2025, the lowest and highest yearly March monthly means were 26.8–28.2°C. These are not daily extremes.

Previous month

February · 27.2°C

Change into March: +0.3°C

Next month

April · 27.9°C

Change into next month: +0.4°C

Can you swim or snorkel in Anse Chastanet in March?

At 27.5°C our temperature-only guide describes the water as warm water. Comfort depends on your cold tolerance, immersion time and wind. A historical average cannot determine whether conditions are safe on any given day.

Do you need a wetsuit?

Most people are comfortable in swimwear or a light rash guard.

Which beach should you choose?

Look for a beach sheltered from the actual forecast waves and wind on your visit. Exposure, currents and entry conditions vary even where water temperatures are similar. Follow local warnings.

Check the current waves, wind and snorkeling forecast →

A live forecast does not predict a future March. Check again close to your trip.

Anse Chastanet Sea Temperature: All 12 Months

Choose a month for available historical evidence, month comparisons and swim guidance. Missing history is clearly marked and never presented as a long-term normal.

January 27.6°C February 27.2°C March 27.5°C April 27.9°C May 28.5°C June 28.7°C July 28.9°C August 29.6°C September 30.2°C October 30.1°C November 29.2°C December 28.3°C

Data source and limitations

Source: Open-Meteo Marine API, MeteoFrance sea-surface temperature; 2023–2025. Marine model grid near 13.86, -61.08. Based on 3 yearly monthly means and 2232 recorded samples. Source methodology.

Modelled sea-surface temperatures do not establish underwater visibility, wildlife, calm currents or safe entry.