Colonial Beach — Water Temperature, Sea Conditions & Trends
This page provides clear and up-to-date information about water temperature for Colonial Beach (Virginia, 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 Colonial Beach help you plan your visit and choose the best time for swimming.
Current Water Temperature
Water temperature in Colonial Beach in the Atlantic Ocean today is 21°C.
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 Colonial Beach today is lower than both a week ago and a month ago. Currently, the sea water temperature at this location matches the average for this day in previous years.
According to our forecast, Water temperature in Colonial Beach will be 19.9°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 |
|---|---|---|---|
| OCT 5 | 21.4°C | 22.0°C | |
| OCT 6 | 21.4°C | 22.0°C | |
| OCT 7 | 21.0°C | 22.0°C | |
| OCT 8 | 20.7°C | 21.8°C | |
| OCT 9 | 20.5°C | 22.0°C | |
| OCT 10 | 20.2°C | 21.5°C | |
| OCT 11 | 20.5°C | 21.8°C | |
| OCT 12 | 20.2°C | 21.0°C | |
| OCT 13 | 20.5°C | 20.5°C | 20.5°C |
| OCT 14 | 21.3°C | 20.4°C | |
| OCT 15 | 20.5°C | 20.3°C | |
| OCT 16 | 20.8°C | 20.2°C | |
| OCT 17 | 20.5°C | 20.1°C | |
| OCT 18 | 20.0°C | 20.1°C | |
| OCT 19 | 19.5°C | 20.0°C | |
| OCT 20 | 19.3°C | 19.9°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
Colonial Beach, Virginia, sits on the Potomac River where the river broadens into a tidal estuary, so water temperatures reflect both seasonal air temperatures and tidal influence. In winter the river typically cools to around 1–8°C, with the coldest conditions in January and February. Spring brings a steady rise, with waters commonly between 8–18°C by April and May as shallows warm more quickly. Peak summer temperatures usually occur in July and August, when surface readings often reach 20–27°C, providing the most comfortable conditions for casual swimming. During autumn the water cools again, generally falling into the 10–20°C range through September and October as shorter days and cooler nights reduce warming; short-term weather, wind and freshwater inflows can cause noticeable swings around these averages.
Monthly Water Temperature Range (Min, Max & Average)
| Month | Min | Avg | Max |
|---|---|---|---|
| January | 3°C | 6°C | 11°C |
| February | 2°C | 6°C | 9°C |
| March | 4°C | 8°C | 12°C |
| April | 8°C | 13°C | 17°C |
| May | 10°C | 17°C | 23°C |
| June | 17°C | 23°C | 27°C |
| July | 22°C | 27°C | 30°C |
| August | 24°C | 27°C | 30°C |
| September | 21°C | 24°C | 30°C |
| October | 15°C | 20°C | 24°C |
| November | 8°C | 14°C | 19°C |
| December | 4°C | 8°C | 14°C |
* Click on a month to view detailed water temperature data.
Colonial Beach: Weather Forecast
October 14
October 15
October 16
Location, Beaches & Local Information
Nearby Beaches & Facilities
Colonial Beach
South Colonial Beach
George Washington Birthplace National Monument
Swimming Conditions
Swimming and beach holidays in Colonial Beach are centered on the town’s sandy shoreline and designated waterfront spots that capitalize on the estuary’s gentle gradients. The warmest months offer the best conditions for bathing, while shoulder seasons suit more active water pursuits such as kayaking, paddleboarding and boating when the water is cooler. Visitors should be aware of boat traffic, tidal currents and variable clarity in estuarine waters and check local advisories before entering. During summer the main public waterfront typically provides seasonal amenities and services, making it suitable for family outings, sunbathing and short swims; for those seeking extended water time, nearby marinas and launch points also support a broader range of recreational water activities that complement a beach-centered stay.