Stock Island — Water Temperature, Sea Conditions & Trends
This page provides clear and up-to-date information about water temperature for Stock Island (Florida, United States). 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 Stock Island help you plan your visit and choose the best time for swimming.
Current Water Temperature
Water temperature in Stock Island in the Gulf of America today is 29°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 Stock Island has fallen over the last month but risen over the last 7 days. Currently, the sea water temperature at this location matches the average for this day in previous years.
According to our forecast, Water temperature in Stock Island will be 28.4°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 6 | 29.9°C | 28.0°C | |
| JUN 7 | 29.3°C | 28.3°C | |
| JUN 8 | 29.1°C | 28.3°C | |
| JUN 9 | 28.9°C | 28.3°C | |
| JUN 10 | 28.8°C | 28.5°C | |
| JUN 11 | 28.9°C | 28.8°C | |
| JUN 12 | 28.9°C | 28.8°C | |
| JUN 13 | 29.2°C | 28.5°C | |
| JUN 14 | 29.1°C | 28.5°C | 29.1°C |
| JUN 15 | 28.5°C | 29.0°C | |
| JUN 16 | 28.8°C | 28.9°C | |
| JUN 17 | 28.3°C | 28.8°C | |
| JUN 18 | 28.5°C | 28.7°C | |
| JUN 19 | 28.3°C | 28.6°C | |
| JUN 20 | 28.3°C | 28.5°C | |
| JUN 21 | 28.8°C | 28.4°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
Stock Island, a small island adjacent to Key West in the lower Florida Keys, sits in subtropical waters that remain relatively warm year-round. Sea temperatures around Stock Island typically range from about 23–25 °C in the coolest winter months to roughly 28–31 °C during the peak of summer. Spring sees a steady rise with waters commonly between 24–27 °C, while autumn temperatures usually linger in the mid-to-high 20s °C as the ocean slowly cools. Local conditions can vary with winds, tides and weather systems, and shallow bays and channels around the island can warm or cool slightly faster than open-ocean readings, but overall the surrounding waters are milder compared with most continental U.S. coastal areas.
Monthly Water Temperature Range (Min, Max & Average)
| Month | Min | Avg | Max |
|---|---|---|---|
| January | 19°C | 22°C | 26°C |
| February | 19°C | 23°C | 26°C |
| March | 20°C | 24°C | 27°C |
| April | 22°C | 26°C | 28°C |
| May | 24°C | 27°C | 31°C |
| June | 26°C | 29°C | 31°C |
| July | 27°C | 30°C | 34°C |
| August | 28°C | 31°C | 33°C |
| September | 27°C | 30°C | 32°C |
| October | 25°C | 29°C | 30°C |
| November | 22°C | 26°C | 29°C |
| December | 21°C | 24°C | 27°C |
* Click on a month to view detailed water temperature data.
Stock Island: Weather Forecast
June 15
June 16
June 17
June 18
Location, Beaches & Local Information
Nearby Beaches & Facilities
Boca Chica Beach
Smathers Beach
Higgs Beach
Rest Beach Park
Harvey Rest Beach Park
South Beach
Simonton Beach
Geiger Beach
Sunset Key Beach
Swimming Conditions
Swimming and beach recreation around Stock Island are attractive for visitors seeking warm, calm water and easy access to marine activities. While the island itself is more known for marinas, fishing and small waterfront parks than long sandy beaches, it offers plenty of opportunities to wade, swim from boat launches and enjoy nearby sandy stretches on adjacent Key West. The protected bays and flats are well suited to snorkelling, paddleboarding and casual swimming, with seagrass and coral habitats close by for exploration on calm days. Water clarity and comfort are generally excellent in summer and autumn, and many visitors combine swimming with boat trips, guided snorkel tours or short rides to sandy beaches a few minutes away.