Blue Hill — Water Temperature, Sea Conditions & Trends
This page provides clear and up-to-date information about water temperature for Blue Hill (Maine, 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 Blue Hill help you plan your visit and choose the best time for swimming.
Current Water Temperature
Water temperature in Blue Hill in the Atlantic Ocean today is 14°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
⚠️ As of today, the minimum water temperature ranges from 54°F (12°C) to 60°F (15°C). The water is significantly warmer, and swimming becomes possible for most people. However, caution may still be required for prolonged stays in the water, as extended exposure can cause discomfort. This is a suitable temperature range for short swims and for those accustomed to cooler water. For more comfortable swimming, it is recommended to use proper gear.
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 Blue Hill rose over the last 30 days but fell over the last week. Currently, the sea water temperature at this location matches the average for this day in previous years.
According to our forecast, Water temperature in Blue Hill will be 13.6°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 |
|---|---|---|---|
| JUL 15 | 16.1°C | 13.8°C | |
| JUL 16 | 16.1°C | 14.0°C | |
| JUL 17 | 15.7°C | 13.5°C | |
| JUL 18 | 15.4°C | 14.0°C | |
| JUL 19 | 15.1°C | 14.0°C | |
| JUL 20 | 14.4°C | 13.8°C | |
| JUL 21 | 14.4°C | 14.0°C | |
| JUL 22 | 14.2°C | 13.5°C | |
| JUL 23 | 14.2°C | 13.5°C | 14.2°C |
| JUL 24 | 13.8°C | 14.1°C | |
| JUL 25 | 14.0°C | 14.0°C | |
| JUL 26 | 13.5°C | 14.0°C | |
| JUL 27 | 14.3°C | 13.9°C | |
| JUL 28 | 13.5°C | 13.8°C | |
| JUL 29 | 13.5°C | 13.7°C | |
| JUL 30 | 14.5°C | 13.6°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
Blue Hill, located on the shores of Blue Hill Bay in coastal Maine, is characterized by a mix of exposed rocky coastline and sheltered inlets that influence local water conditions. The ocean here reflects the broader Gulf of Maine pattern: winter surface temperatures are cold, commonly around -1 to 4 °C, while spring sees a steady rise to roughly 2 to 10 °C. By early summer waters typically reach about 10 to 14 °C, with the warmest period in July and August when sheltered spots and shallow bays can climb to roughly 14 to 18 °C. In autumn the surface cools again, generally falling between 8 and 14 °C depending on weather and tidal mixing. Local readings can vary day to day with wind, tides and freshwater runoff, so these seasonal bands are typical rather than exact.
Monthly Water Temperature Range (Min, Max & Average)
| Month | Min | Avg | Max |
|---|---|---|---|
| January | 2°C | 5°C | 8°C |
| February | 1°C | 3°C | 6°C |
| March | 1°C | 3°C | 5°C |
| April | 3°C | 5°C | 7°C |
| May | 5°C | 8°C | 11°C |
| June | 7°C | 11°C | 14°C |
| July | 11°C | 13°C | 17°C |
| August | 12°C | 15°C | 18°C |
| September | 11°C | 14°C | 18°C |
| October | 8°C | 13°C | 16°C |
| November | 7°C | 10°C | 14°C |
| December | 5°C | 7°C | 11°C |
* Click on a month to view detailed water temperature data.
Blue Hill: Weather Forecast
July 24
July 25
July 26
July 27
Location, Beaches & Local Information
Swimming Conditions
Swimming and beach holidays around Blue Hill are modest and often oriented toward appreciation of coastal scenery rather than long warm-water bathing seasons. There are small public beaches, tidal flats and protected coves that offer entry points for short swims, wading and water activities such as kayaking and paddleboarding; however, the water is cool even in summer and many visitors opt for wetsuits or brief dips rather than extended immersion. The rocky shorelines provide scenic picnic and tidepooling opportunities, and sheltered coves warm more quickly than open bay waters. Swimmers should be mindful of tidal currents, variable underfoot conditions and quickly changing temperatures; the most comfortable window for recreational swimming is typically mid-July through August when surface temperatures are at their seasonal peak.