Bellport — Water Temperature, Sea Conditions & Trends
This page provides clear and up-to-date information about water temperature for Bellport (New York, 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 Bellport help you plan your visit and choose the best time for swimming.
Current Water Temperature
Water temperature in Bellport in the Atlantic Ocean today is 23°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature ranges from 75°F (23°C) to 79°F (26°C). This is a very comfortable temperature for swimming, and many people can enjoy prolonged stays in the water without feeling cold. The water is pleasantly warm, making it ideal for relaxation and water sports. This temperature range is particularly popular among tourists, as it combines comfort and safety for health.
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 Bellport has risen over the last week and month. Currently, the sea water at this location is slightly warmer than average for this day in previous years.
According to our forecast, Water temperature in Bellport will be 23.3°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 |
|---|---|---|---|
| JUN 27 | 18.5°C | 14.0°C | |
| JUN 28 | 18.8°C | 14.3°C | |
| JUN 29 | 20.4°C | 14.3°C | |
| JUN 30 | 20.5°C | 20.5°C | |
| JUL 1 | 20.8°C | 21.0°C | |
| JUL 2 | 21.4°C | 20.3°C | |
| JUL 3 | 21.2°C | 20.5°C | |
| JUL 4 | 21.0°C | 21.3°C | |
| JUL 5 | 23.0°C | 21.3°C | 23.0°C |
| JUL 6 | 21.0°C | 23.0°C | |
| JUL 7 | 21.5°C | 23.1°C | |
| JUL 8 | 21.8°C | 23.1°C | |
| JUL 9 | 21.5°C | 23.2°C | |
| JUL 10 | 21.8°C | 23.2°C | |
| JUL 11 | 22.0°C | 23.2°C | |
| JUL 12 | 22.0°C | 23.3°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
Bellport is a small village on Long Island’s south shore, fronting the sheltered waters of the Great South Bay. Because the bay is relatively shallow and protected from open-ocean swell, its water temperature follows clear seasonal patterns but can change quickly with weather and tidal flow. Typical winter temperatures from December through February range from about 0°C to 5°C, often too cold for casual swimming. In spring, March through May, waters usually rise into the 5°C–15°C band as air temperatures and sunlight increase. Summer months, June to August, are when the bay is warmest, commonly reaching about 18°C–25°C at peak, with the warmest readings in July and August. In autumn, September to November, temperatures gradually fall, often sitting between roughly 10°C and 20°C before the onset of winter chill. Local conditions such as recent storms, wind direction, or runoff can shift these values by several degrees.
Monthly Water Temperature Range (Min, Max & Average)
| Month | Min | Avg | Max |
|---|---|---|---|
| January | 2°C | 6°C | 11°C |
| February | 2°C | 4°C | 7°C |
| March | 2°C | 5°C | 7°C |
| April | 4°C | 7°C | 12°C |
| May | 8°C | 12°C | 17°C |
| June | 13°C | 18°C | 23°C |
| July | 18°C | 22°C | 26°C |
| August | 21°C | 23°C | 26°C |
| September | 18°C | 21°C | 25°C |
| October | 13°C | 18°C | 22°C |
| November | 9°C | 14°C | 18°C |
| December | 5°C | 9°C | 13°C |
* Click on a month to view detailed water temperature data.
Bellport: Weather Forecast
July 6
July 7
July 8
Location, Beaches & Local Information
Nearby Beaches & Facilities
Ho-Hum Beach Marina
Bellport Beach
Patchogue Beach Club
Sandspit Beach
Smith Point County Park
Corey Creek Park Blue Point Beach
Blue Point Beach
Davis Park Beach
Swimming Conditions
Swimming and beach holiday opportunities around Bellport reflect the bay’s sheltered character and its proximity to larger public beaches within a short drive. The village waterfront and nearby shorelines provide calm, family-friendly spots for swimming, wading and paddle sports when summer temperatures are in the low to mid-20s °C, and lifeguard coverage and facilities vary by location and season. For more extensive sandy ocean beaches, barrier beaches and county parks along the south shore offer broader swimming areas but can have cooler water and stronger currents. Visitors should check local advisories, respect posted safety information, and note that shoulder seasons bring fewer services and cooler water, while midsummer offers the most comfortable conditions for a traditional beach holiday.