Rockport — Water Temperature, Sea Conditions & Trends
This page provides clear and up-to-date information about water temperature for Rockport (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 Rockport help you plan your visit and choose the best time for swimming.
Current Water Temperature
Water temperature in Rockport in the Atlantic Ocean today is 13°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 Rockport 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 Rockport will be 11.7°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 | 10.1°C | 10.0°C | |
| JUN 7 | 11.3°C | 10.5°C | |
| JUN 8 | 11.4°C | 10.5°C | |
| JUN 9 | 11.0°C | 11.0°C | |
| JUN 10 | 10.8°C | 11.0°C | |
| JUN 11 | 11.3°C | 10.3°C | |
| JUN 12 | 11.4°C | 12.0°C | |
| JUN 13 | 13.5°C | 12.0°C | |
| JUN 14 | 12.7°C | 12.0°C | 12.7°C |
| JUN 15 | 10.5°C | 12.6°C | |
| JUN 16 | 10.8°C | 12.4°C | |
| JUN 17 | 11.3°C | 12.3°C | |
| JUN 18 | 11.5°C | 12.1°C | |
| JUN 19 | 11.5°C | 12.0°C | |
| JUN 20 | 12.0°C | 11.8°C | |
| JUN 21 | 12.0°C | 11.7°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
Rockport, Maine sits on the mid-coast along Penobscot Bay, where the influence of the Gulf of Maine keeps coastal waters relatively cool year-round. Typical surface temperatures follow a clear seasonal pattern: in winter months the water usually ranges from about 0 °C to 4 °C, and during spring it warms gradually into the 2 °C to 10 °C range. By early summer temperatures are often between 10 °C and 14 °C, with the warmest conditions in July and August when surface readings most commonly reach 14 °C to 18 °C. In autumn the sea cools back down, generally sitting between 8 °C and 14 °C, and by late fall it returns toward single digits. Local weather, currents and occasional heat spells can shift these values modestly, but the water remains notably colder than southern coastal areas.
Monthly Water Temperature Range (Min, Max & Average)
| Month | Min | Avg | Max |
|---|---|---|---|
| January | 2°C | 5°C | 7°C |
| February | 1°C | 3°C | 6°C |
| March | 1°C | 3°C | 6°C |
| April | 2°C | 5°C | 7°C |
| May | 4°C | 7°C | 11°C |
| June | 8°C | 11°C | 14°C |
| July | 11°C | 14°C | 17°C |
| August | 13°C | 15°C | 18°C |
| September | 12°C | 14°C | 17°C |
| October | 8°C | 13°C | 16°C |
| November | 7°C | 11°C | 14°C |
| December | 3°C | 7°C | 11°C |
* Click on a month to view detailed water temperature data.
Rockport: Weather Forecast
June 15
June 16
June 17
June 18
Location, Beaches & Local Information
Nearby Beaches & Facilities
Laite Memorial Beach
South End Beach
Owls Head State Park
Swimming Conditions
Swimming and beach holidays around Rockport reflect those temperature patterns, so peak swimming is concentrated in the brief warm window of midsummer. Sheltered coves and small sandy stretches offer pleasant, if cool, bathing in July and August, while rockier shorelines and exposed points are better suited to quick dips, shore wading, or watersports like kayaking and paddleboarding. Many visitors combine short swims with boating or island excursions, and wetsuits are common for longer swims or for late‑season outings. Tides and localized currents can affect safety and comfort, so swimmers tend to favor calm bays and supervised spots during the warmest weeks; outside that period the coast is more popular for sightseeing, coastal walks and shoreline recreation than for prolonged bathing.