World sea water temperatures

Water temperature in Islip in July

Is it warm enough to swim in Islip in July? Average water temperature in Islip in July is 74.1°F and therefore suitable for comfortable swimming. The warmest sea in Islip in July is 83.7°F, and the coldest is 65.8°F. Average high air temperature in Islip in July is 82°F, and average low temperature is 66°F. To find out the sea temperature today and in the coming days, go to Current sea temperature in Islip

Changes water temperature in Islip in July 2025, 2024

To get an accurate forecast for the water temperature in Islip for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in Islip, the selected years in the table also show the values of the maximum and minimum temperatures on each of the days of July.

You can choose any other years:

Year 1:   Year 2:


Day 2025 2024 Min Max
July 175.4°F73.6°F66.9°F76.8°F
July 274.3°F73.4°F67.1°F76.3°F
July 375.9°F73.4°F66.6°F78.1°F
July 477°F74.5°F67.1°F79.2°F
July 576.6°F75.6°F66.4°F79.3°F
July 677.4°F73.4°F65.8°F79.9°F
July 777.7°F75.7°F67.1°F80.1°F
July 876.8°F76.5°F67.5°F80.8°F
July 977.9°F76.1°F67.3°F83.1°F
July 1076.8°F78.4°F67.3°F82.9°F
July 1178.8°F80.2°F68.2°F81.3°F
July 1279.5°F79°F68.2°F80.8°F
July 1378.8°F81.1°F68.2°F81.1°F
July 1477°F79.3°F68.5°F81.1°F
July 1577.7°F79.9°F68.4°F80.8°F
Day 2025 2024 Min Max
July 1680.6°F81°F68.7°F81°F
July 1780.2°F80.8°F69.6°F80.8°F
July 1881.7°F80.6°F70.2°F81.7°F
July 1980.1°F80.6°F70.5°F80.6°F
July 2080.2°F79.3°F70.2°F81.7°F
July 2180.4°F81.3°F70.3°F82.4°F
July 2279.7°F79.2°F70.3°F83.3°F
July 2378.4°F78.4°F69.6°F82.2°F
July 2477.7°F77.7°F69.3°F80.6°F
July 2578.1°F79.3°F69.3°F80.1°F
July 2678.6°F78.4°F70.3°F81.1°F
July 2777.4°F78.4°F70.9°F82.2°F
July 2877.7°F77.5°F70.9°F82.4°F
July 2978.1°F76.8°F70.9°F83.7°F
July 3080.8°F76.5°F70.9°F81.9°F
July 3180.4°F77.5°F70.9°F81.3°F
Islip water temp chart in July

Average water temperature in Islip in July over a decade

20162017201820192020
72.1°F71.4°F72.9°F79.7°F78.3°F
20212022202320242025
76.6°F76.6°F80.1°F77.9°F78.3°F

Islip sea state in July

Chart comparing the height of waves in Islip in July over the past years. The red line indicates the height of the waves when swimming in the sea is prohibited. To view the current sea conditions, click on the graph.

Waves height in Islip in July

Weather and climate in Islip in July

This data display average monthly climate indicators in Islip in July based on our historical weather readings over a period of ten years. In addition to temperature, we include data on the number of rainy and sunny days so you can have all the information about your destination before your trip

  • Average HIGH temperature82°F
  • Average LOW temperature66°F
  • Average rainfall days9 days
  • Average rainfall86mm/3.4''

Islip water temperature during other months:

You can also view information about water temperature for other months by clicking on the month button below

Where is the warm sea water in July?

Want to know where the water temperature in July is good for swimming? Select the continent of interest, the day of the month and the required water temperature

Region
Date (day and month)
Water temperature: min 60°F
 Average temperature  Maximum temperature

Temperature in neighboring cities

The nearest locations with the average water temperature in July. In addition, the maximum and minimum water temperatures for that month, recorded over the last decade, are shown

AvrMinMax
New York City73.6°F67.8°F78.8°F
Great River73.9°F65.7°F83.7°F
Bay Shore73.4°F65.8°F82.4°F
Babylon73.4°F66°F82.2°F
Great South Bay73.2°F65.7°F82.2°F
West Sayville73.6°F65.5°F83.1°F
Kismet72.5°F65.8°F81°F
Democrat Point72.9°F66°F81°F
Saltaire72.5°F65.8°F81°F
Oak Beach72.9°F66°F81°F

Long Island photo gallery

  • Long Island
  • Long Island
  • Long Island
  • Port Jefferson Ferry - Port Jefferson harbor

If you have interesting photos of this place, you can upload them here. Photos will be available to all users after verification by the moderator.

Vote for Long Island best beach

Current rating: (0 votes cast)

If you know this place (Islip) and want to leave your comment or rate it, then fill out the following form.

Your rating for this place:

Does this place have a "Blue Flag" award [1], are there rip currents and what type of beach is it, sand or pebble:

Is the beach a dog-friendly place, child friendly or a nudist beach?


Your comments for this place (water quality, crowds, facilities, activities, lifeguards, service etc.):



[1] - The "Blue Flag" is awarded to beaches which fulfill a number of criteria, including: the quality of the bathing water, which must be in accordance with the relevant European Union Directive environmental education and information and beach area management and safety.

Get widget or API for your website

Our report for Islip is compiled using satellite data together with in-situ observations to get the most reliable daily data of sea surface temperatures, surf forecasts, current temperatures and weather forecasts.

Contact us: admin@seatemperature.info
privacy policy