Falmouth — Water Temperature, Sea Conditions & Trends
This page provides clear and up-to-date information about water temperature for Falmouth (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 Falmouth help you plan your visit and choose the best time for swimming.
Current Water Temperature
Water temperature in Falmouth in the Atlantic Ocean today is 18°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 Falmouth 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 Falmouth will be 17.3°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 |
|---|---|---|---|
| AUG 9 | 19.2°C | 17.5°C | |
| AUG 10 | 19.0°C | 17.8°C | |
| AUG 11 | 19.3°C | 17.8°C | |
| AUG 12 | 18.8°C | 18.3°C | |
| AUG 13 | 19.3°C | 18.5°C | |
| AUG 14 | 19.2°C | 18.3°C | |
| AUG 15 | 18.7°C | 18.3°C | |
| AUG 16 | 18.2°C | 18.3°C | |
| AUG 17 | 18.0°C | 18.5°C | 18.0°C |
| AUG 18 | 17.5°C | 17.9°C | |
| AUG 19 | 17.3°C | 17.8°C | |
| AUG 20 | 16.8°C | 17.7°C | |
| AUG 21 | 17.3°C | 17.6°C | |
| AUG 22 | 17.3°C | 17.5°C | |
| AUG 23 | 17.0°C | 17.4°C | |
| AUG 24 | 17.0°C | 17.3°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
Falmouth, Maine, sits along the sheltered shores of Casco Bay and features a mix of rocky coastline, ledges and small sandy coves. Sea surface temperatures here reflect the strong seasonal swing of the Gulf of Maine: winter lows generally sit around 0–3°C, spring brings a gradual warming to roughly 2–10°C, summer peaks typically between 12–20°C with July and August usually the warmest, and autumn cools the water back to approximately 7–15°C. Tidal ranges and local topography influence how cold or warm a specific waterfront spot feels on any given day, with shallow, protected inlets warming more quickly in summer than exposed, deeper areas. Weather patterns and occasional warm spells can push summer surface temperatures toward the upper end of the range.
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 | 4°C | 6°C |
| April | 2°C | 5°C | 8°C |
| May | 4°C | 9°C | 13°C |
| June | 8°C | 12°C | 16°C |
| July | 12°C | 15°C | 19°C |
| August | 13°C | 17°C | 21°C |
| September | 12°C | 16°C | 19°C |
| October | 8°C | 13°C | 17°C |
| November | 7°C | 10°C | 14°C |
| December | 3°C | 8°C | 11°C |
* Click on a month to view detailed water temperature data.
Falmouth: Weather Forecast
August 18
August 19
August 20
August 21
Location, Beaches & Local Information
Nearby Beaches & Facilities
Martin Point Trail
Broad Cove Reserve
East End Beach
Fowler Beach
West Shore Sandy Beach
Andrews Beach
Sandy Point Bridge
Willard Beach
Littlejohn
Swimming Conditions
Swimming and beach holidays in Falmouth suit visitors who appreciate a New England shoreline that combines scenic views with seasonal bathing. In summer the milder sea makes swimming and wading comfortable for many, especially in sheltered coves and around small islands accessible by short boat trips or causeways; water activities such as kayaking and paddleboarding are also popular. Because water is often cool outside mid-summer, many swimmers prefer short swims or wetsuits during cooler months and should pay attention to tides and currents near rocky sections. Beachgoers will find that sandier pockets, picnic spots and nearby walking trails make Falmouth a pleasant base for a seaside break, with the ideal swimming window concentrated in July and August when surface temperatures are highest.