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Sea Temperature in Port Jefferson in September
© Sharon H
Complete information on the sea temperature range in the Atlantic Ocean in Port Jefferson in September. Historical daily data. Climate details for September. Tips on swimming conditions and beach relaxation in Port Jefferson. We find every spot where you can swim and tell you what the water temperature is there today and throughout the year.
Water Temperature Range in Port Jefferson in September
18°C
MINIMUN
21.5°C
AVERAGE
25°C
MAXIMUM
Historical Data of Water Temperature in September in Port Jefferson
Water Temperature Chart for Atlantic Ocean in Port Jefferson in September
Sea Temperature Table in Port Jefferson in September Over the Past Years
| Day | 2024 | 2023 | 2022 | Average |
|---|---|---|---|---|
| Sep 1 | 23°C | 23°C | 21°C | 22.3°C |
| Sep 2 | 24°C | 23°C | 21°C | 22.5°C |
| Sep 3 | 22°C | 22°C | 21°C | 22.0°C |
| Sep 4 | 22°C | 23°C | 21°C | 22.3°C |
| Sep 5 | 22°C | 23°C | 20°C | 21.8°C |
| Sep 6 | 23°C | 24°C | 21°C | 22.3°C |
| Sep 7 | 23°C | 23°C | 21°C | 22.0°C |
| Sep 8 | 22°C | 23°C | 21°C | 21.8°C |
| Sep 9 | 23°C | 23°C | 20°C | 21.8°C |
| Sep 10 | 24°C | 23°C | 20°C | 22.0°C |
| Sep 11 | 22°C | 23°C | 20°C | 21.3°C |
| Sep 12 | 23°C | 22°C | 20°C | 21.5°C |
| Sep 13 | 23°C | 22°C | 20°C | 21.3°C |
| Sep 14 | 23°C | 23°C | 20°C | 21.8°C |
| Sep 15 | 24°C | 22°C | 21°C | 22.0°C |
| Sep 16 | 23°C | 22°C | 21°C | 22.0°C |
| Sep 17 | 23°C | 22°C | 21°C | 21.8°C |
| Sep 18 | 24°C | 21°C | 22°C | 22.0°C |
| Sep 19 | 23°C | 21°C | 22°C | 21.8°C |
| Sep 20 | 23°C | 21°C | 21°C | 21.5°C |
| Sep 21 | 24°C | 20°C | 21°C | 21.5°C |
| Sep 22 | 23°C | 20°C | 20°C | 21.0°C |
| Sep 23 | 24°C | 19°C | 20°C | 21.0°C |
| Sep 24 | 23°C | 19°C | 20°C | 20.8°C |
| Sep 25 | 24°C | 20°C | 21°C | 21.5°C |
| Sep 26 | 23°C | 19°C | 21°C | 20.5°C |
| Sep 27 | 23°C | 19°C | 21°C | 20.5°C |
| Sep 28 | 23°C | 20°C | 21°C | 20.8°C |
| Sep 29 | 22°C | 20°C | 21°C | 20.5°C |
Port Jefferson Climate and Swimming Opportunities in September
24°C
Average Day Air Temperature
14°C
Average Night Air Temperature
98 mm
Precipitation Amount per Month
9 days
Number of Rainy Days
12 hrs
Daylight
per Day
7 hrs
Sunshine
per Day
14 km/h
Average Wind Speed
75%
Average
humidity
Port Jefferson lies within the New York in United States. The average daytime temperature in Port Jefferson in September is 75°F (24°C), while the nighttime average is 57°F (14°C). There are typically nine rainy days during the month, with a total precipitation of 3.8 inches (98 mm). The daylight duration in September in Port Jefferson is 12 hours, with an average of 7 hours of sunshine per day. The average wind speed in September is 9 mph (14 km/h), and the humidity level is around 75%.
The water temperature in Port Jefferson in September ranges from 68°F to 73°F (20°C to 23°C). At the beginning of the month, the average temperature is around 72°F (22°C), shifting to 72°F (22°C) by mid-September and reaching 70°F (21°C) in the last ten days. Overall, the average sea temperature in Port Jefferson for September is 72°F (22°C). Optimal swimming conditions. The water is warm, and the air is comfortable for drying off and sunbathing.
Sea Temperature in September in Nearby Cities
Frequently Asked Questions About Water Temperatures in September in Port Jefferson
What is the sea temperature in Port Jefferson in September?
The water temperature in the Atlantic Ocean in Port Jefferson in September ranges from 68°F to 73°F (20°C to 23°C).
Is it possible to swim in the Atlantic Ocean in Port Jefferson in September?
The average sea temperature in Port Jefferson in September is 72°F (22°C), and the air temperature is 75°F (24°C), so optimal swimming conditions. The water is warm, and the air is comfortable for drying off and sunbathing.