Fort Caswell — Water Temperature, Sea Conditions & Trends
This page provides clear and up-to-date information about water temperature for Fort Caswell (North Carolina, 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 Fort Caswell help you plan your visit and choose the best time for swimming.
Current Water Temperature
Water temperature in Fort Caswell in the Atlantic Ocean today is 70°F.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature ranges from 68°F (20°C) to 74°F (23°C). The water is warm and pleasant for swimming, and in this range, one can stay in the water for extended periods without the risk of hypothermia. This is the ideal temperature for relaxation, swimming, and water sports. Families with children, as well as outdoor enthusiasts, will enjoy swimming and time spent in the water. For most people, this is the optimal temperature for a comfortable beach experience.
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 Fort Caswell has risen over the last week and month. Currently, the sea water at this location is slightly cooler than average for this day in previous years.
According to our forecast, Water temperature in Fort Caswell will be 74°F 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 |
|---|---|---|---|
| MAY 10 | 69°F | 70°F | |
| MAY 11 | 69°F | 71°F | |
| MAY 12 | 68°F | 69°F | |
| MAY 13 | 70°F | 69°F | |
| MAY 14 | 70°F | 71°F | |
| MAY 15 | 70°F | 70°F | |
| MAY 16 | 70°F | 71°F | |
| MAY 17 | 70°F | 73°F | |
| MAY 18 | 70°F | 73°F | 70°F |
| MAY 19 | 73°F | 71°F | |
| MAY 20 | 73°F | 71°F | |
| MAY 21 | 74°F | 72°F | |
| MAY 22 | 73°F | 72°F | |
| MAY 23 | 74°F | 73°F | |
| MAY 24 | 75°F | 73°F | |
| MAY 25 | 76°F | 74°F |
* 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
Fort Caswell sits on the western tip of Oak Island at the mouth of the Cape Fear River, facing the Atlantic Ocean. Water temperatures in the area follow a clear seasonal pattern: winter months typically see nearshore sea surface temperatures around 8–14°C, spring brings a steady rise to roughly 12–20°C, summer is warmest with common readings of 23–28°C, and autumn cools gradually to about 18–24°C. Shallow nearshore waters will warm and cool faster than offshore waters, and river outflow and tides can produce local variations, so conditions at the shoreline can differ from broader regional averages on any given day.
Monthly Water Temperature Range (Min, Max & Average)
| Month | Min | Avg | Max |
|---|---|---|---|
| January | 50°F | 56°F | 64°F |
| February | 50°F | 54°F | 63°F |
| March | 52°F | 56°F | 63°F |
| April | 57°F | 63°F | 72°F |
| May | 64°F | 71°F | 81°F |
| June | 70°F | 78°F | 82°F |
| July | 79°F | 81°F | 86°F |
| August | 79°F | 83°F | 86°F |
| September | 73°F | 80°F | 86°F |
| October | 66°F | 75°F | 82°F |
| November | 59°F | 65°F | 73°F |
| December | 52°F | 58°F | 66°F |
* Click on a month to view detailed water temperature data.
Fort Caswell: Weather Forecast
May 20
May 21
May 22
Location, Beaches & Local Information
Nearby Beaches & Facilities
Caswell Beach
Beach At Bald Head Harbor Entrance
Caswell Beach Public Access #2
Waterfront Park
Bald Head Island Beach
Dutchman Inlet Park
Oak Island Beach
Oak Island Pier
Bay Beach
Swimming Conditions
Swimming and beach holidays around Fort Caswell are driven by those seasonal temperatures and by local beach conditions. The sandy shores adjacent to the fort and nearby Caswell Beach and Oak Island are popular for family outings, wading, ocean swimming and surface water sports when temperatures are highest in late spring through early fall; water above about 20°C is generally comfortable for most swimmers. Visitors should be mindful of changing currents, tides and occasional rip currents at the inlet, and jellyfish or cooler upwelled water can occur sporadically. Lifeguard coverage and amenities are more likely during the summer season, so checking local advisories and weather before entering the water will help ensure a safer beach experience.