Castries — Water Temperature, Sea Conditions & Trends
This page provides clear and up-to-date information about water temperature for Castries (Saint Lucia). It includes the current water temperature, daily data for the last month presented in a simple chart, and a 7-day forecast. The page also compares today’s value with typical averages for this period, shows usual monthly ranges during the year, and lists nearby beaches with short descriptions. Local weather for the next few days and general details about Castries help you plan your visit and choose the best time for swimming.
Current Water Temperature
Water temperature in Castries in the Caribbean Sea today is 28°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature is above 82°F (28°C). This is very warm water, which may feel almost hot to most people. Swimming in such conditions is perfect for those seeking relaxation and comfort in the water. These waters are often preferred for relaxation in hot weather, as the water temperature does not cool the body significantly. However, it is important to remember that in such warm waters, caution is necessary, as prolonged exposure without rest can lead to overheating.
It is important to note that these swimming tips and recommendations apply only in good weather. When the air temperature is below 68°F (20°C), and sometimes even below 77°F (25°C), swimming can be unpleasant even with relatively high water temperatures.
Water Temperature Chart Over the Last 30 Days
Water temperature in Castries has risen over the last week and month. Currently, the sea water temperature at this location matches the average for this day in previous years.
According to our forecast, Water temperature in Castries will be 27.8°C in the next 7 days. See the table below for daily data for the upcoming week.
Table of Daily Sea Temperature Data
| Date | Current | Average | Forecast |
|---|---|---|---|
| JUN 2 | 27.9°C | 27.8°C | |
| JUN 3 | 28.1°C | 27.8°C | |
| JUN 4 | 27.9°C | 27.8°C | |
| JUN 5 | 28.0°C | 27.8°C | |
| JUN 6 | 28.0°C | 27.8°C | |
| JUN 7 | 28.0°C | 27.8°C | |
| JUN 8 | 28.1°C | 28.3°C | |
| JUN 9 | 28.1°C | 27.8°C | |
| JUN 10 | 28.2°C | 27.8°C | 28.2°C |
| JUN 11 | 28.3°C | 28.1°C | |
| JUN 12 | 28.0°C | 28.1°C | |
| JUN 13 | 28.3°C | 28.0°C | |
| JUN 14 | 27.8°C | 28.0°C | |
| JUN 15 | 28.0°C | 27.9°C | |
| JUN 16 | 27.5°C | 27.8°C | |
| JUN 17 | 27.5°C | 27.8°C |
* Current - Actual water temperature value
** Average - Average water temperature on this day in recent years
*** Forecast - Our water temperature forecast
Actual nearshore water temperatures may fluctuate by several degrees from the reported values, especially following heavy rainfall or extended periods of strong winds. Certain wind patterns can cause colder, deeper waters to rise and replace the sun-warmed surface water, leading to noticeable variations.
Our forecast is based on a proprietary mathematical model that considers real-time water temperature changes, historical trends, key weather patterns, wind strength and direction, and air temperature specific to each region. Additionally, we incorporate data from other resorts to enhance accuracy.
Water temperature data for this location is gathered from various sources, including buoys and satellite sea and ocean surface maps provided by the NOAA agency. We also incorporate data from local authorities in each specific location worldwide to ensure more accurate temperature readings.
Annual Water Temperature Overview by Month
Monthly Water Temp Ranges
Annual Water Temperature Trend
Castries, the capital of Saint Lucia, sits on the island’s northwestern coast and benefits from a warm Caribbean marine climate. Sea temperatures around Castries remain inviting throughout the year, generally ranging from about 26 °C in the coolest months to around 29 °C in the warmest months. During the December to February period, surface waters typically hover near 26–27 °C, while the spring and early summer months see a gradual rise into the high 20s °C. By late summer and early autumn the sea temperature commonly reaches about 28–29 °C, offering consistently pleasant conditions for water activities regardless of season.
Monthly Water Temperature Range (Min, Max & Average)
| Month | Min | Avg | Max |
|---|---|---|---|
| January | 25°C | 27°C | 29°C |
| February | 25°C | 27°C | 28°C |
| March | 25°C | 27°C | 29°C |
| April | 25°C | 27°C | 29°C |
| May | 26°C | 28°C | 30°C |
| June | 26°C | 28°C | 30°C |
| July | 27°C | 28°C | 30°C |
| August | 27°C | 29°C | 30°C |
| September | 27°C | 30°C | 31°C |
| October | 27°C | 29°C | 31°C |
| November | 26°C | 29°C | 31°C |
| December | 25°C | 28°C | 29°C |
* Click on a month to view detailed water temperature data.
Castries: Weather Forecast
June 11
June 12
June 13
June 14
Location, Beaches & Local Information
Nearby Beaches & Facilities
Vigie Beach
Malabar Beach
La Toc
Pointe Seraphine Beach
Choc Beach
Beautiful Secret Beach
Marisule Beach
Choc Bay
Choc Bay Beach
Swimming Conditions
Swimming opportunities around Castries are varied, with protected bays and shallow beaches on the leeward side providing calm, clear water ideal for families and casual swimmers. The sheltered coves afford good visibility for snorkeling over reefs and around rocky points, while some open-coast stretches can present stronger swells and currents better suited to experienced swimmers or surfers. Facilities, boat tours and nearby resorts support easy beach holidays, and water temperatures make it comfortable to swim without a wetsuit year-round. Visitors should still observe local safety advice about tides and weather, and choose sheltered spots during rougher conditions in the rainy and hurricane season. Overall, Castries offers reliable warm water and a range of coastal settings for both relaxed beach days and active swimming.