Rehoboth Beach — Water Temperature, Sea Conditions & Trends
This page provides clear and up-to-date information about water temperature for Rehoboth Beach (Delaware, 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 Rehoboth Beach help you plan your visit and choose the best time for swimming.
Current Water Temperature
Water temperature in Rehoboth Beach in the Atlantic Ocean today is 20°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
⚠️ As of today, the minimum water temperature ranges from 65°F (18°C) to 68°F (20°C). This is already quite warm water, which is ideal for most people. Swimming becomes comfortable, and prolonged stays in the water do not cause discomfort. This temperature is perfect for family trips and for those who prefer warmer water. It is also comfortable for water sports such as surfing or swimming.
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 Rehoboth Beach 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 Rehoboth Beach will be 19.8°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 1 | 16.7°C | 16.8°C | |
| JUN 2 | 16.5°C | 17.0°C | |
| JUN 3 | 16.8°C | 17.0°C | |
| JUN 4 | 17.0°C | 17.8°C | |
| JUN 5 | 17.3°C | 17.8°C | |
| JUN 6 | 17.6°C | 18.8°C | |
| JUN 7 | 18.0°C | 18.3°C | |
| JUN 8 | 19.0°C | 19.5°C | |
| JUN 9 | 19.7°C | 19.5°C | 19.7°C |
| JUN 10 | 18.8°C | 19.7°C | |
| JUN 11 | 19.0°C | 19.7°C | |
| JUN 12 | 19.5°C | 19.8°C | |
| JUN 13 | 19.3°C | 19.8°C | |
| JUN 14 | 19.8°C | 19.8°C | |
| JUN 15 | 20.0°C | 19.8°C | |
| JUN 16 | 20.3°C | 19.8°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
Rehoboth Beach, on Delaware’s Atlantic coast, is known for its broad sandy shoreline and relatively moderate ocean temperatures for the Mid‑Atlantic. Sea surface conditions vary markedly through the year: in winter months the water is typically cold, often between about 1 °C and 7 °C. Spring brings a steady warming, with typical temperatures rising from roughly 6 °C in early spring to around 12–15 °C by late May. Summer is the warmest season, when average temperatures commonly range from about 18 °C to 24 °C, with the warmest weeks often in July and August. In autumn the ocean cools again, generally falling from roughly 18 °C in September to around 10–13 °C by November. These ranges depend on short‑term weather patterns and tidal influences, so daily conditions may vary.
Monthly Water Temperature Range (Min, Max & Average)
| Month | Min | Avg | Max |
|---|---|---|---|
| January | 1°C | 5°C | 8°C |
| February | 2°C | 4°C | 7°C |
| March | 3°C | 6°C | 10°C |
| April | 4°C | 9°C | 14°C |
| May | 8°C | 15°C | 19°C |
| June | 15°C | 20°C | 25°C |
| July | 19°C | 23°C | 26°C |
| August | 20°C | 25°C | 28°C |
| September | 18°C | 22°C | 27°C |
| October | 14°C | 19°C | 23°C |
| November | 9°C | 14°C | 18°C |
| December | 4°C | 8°C | 12°C |
* Click on a month to view detailed water temperature data.
Rehoboth Beach: Weather Forecast
June 11
June 12
June 13
Location, Beaches & Local Information
Nearby Beaches & Facilities
Rehoboth Beach
Deauville Beach
Whiskey Beach
Henlopen Acres
Gordons Pond State Park Area
Dewey Beach
Indian Beach
Towers Beach
Herring Point
Swimming Conditions
Swimming and beach holidays at Rehoboth are centered on the summer months when water temperatures are most comfortable for prolonged bathing. Many visitors swim, wade, and take part in family beach activities from late June through early September, when lifeguard coverage and beach services are most reliably available. Outside peak summer the water can be brisk and many beachgoers choose to stay onshore or use wetsuits for longer swims. The long, gradual slope of the beach makes for easy entry, and seasonal facilities, rental shops, and nearby accommodations support a classic seaside holiday experience focused on sun, sand, and swimming when the ocean temperatures are at their warmest.