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Sea Temperature in Portsmouth in September
Complete information on the sea temperature range in the Atlantic Ocean in Portsmouth in September. Historical daily data. Climate details for September. Tips on swimming conditions and beach relaxation in Portsmouth. 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 Portsmouth in September
72°F
MINIMUN
78°F
AVERAGE
84°F
MAXIMUM
Historical Data of Water Temperature in September in Portsmouth
Water Temperature Chart for Atlantic Ocean in Portsmouth in September
Sea Temperature Table in Portsmouth in September Over the Past Years
| Day | 2024 | 2023 | 2022 | Average |
|---|---|---|---|---|
| Sep 1 | 82°C | 81°C | 77°C | 80°C |
| Sep 2 | 81°C | 82°C | 75°C | 79°C |
| Sep 3 | 79°C | 81°C | 77°C | 78°C |
| Sep 4 | 81°C | 82°C | 77°C | 80°C |
| Sep 5 | 79°C | 84°C | 75°C | 78°C |
| Sep 6 | 79°C | 82°C | 77°C | 78°C |
| Sep 7 | 79°C | 82°C | 77°C | 78°C |
| Sep 8 | 79°C | 82°C | 75°C | 78°C |
| Sep 9 | 79°C | 82°C | 75°C | 78°C |
| Sep 10 | 79°C | 81°C | 75°C | 78°C |
| Sep 11 | 77°C | 81°C | 75°C | 77°C |
| Sep 12 | 77°C | 81°C | 75°C | 77°C |
| Sep 13 | 77°C | 82°C | 75°C | 78°C |
| Sep 14 | 77°C | 81°C | 75°C | 77°C |
| Sep 15 | 77°C | 81°C | 77°C | 77°C |
| Sep 16 | 79°C | 81°C | 77°C | 78°C |
| Sep 17 | 77°C | 81°C | 75°C | 77°C |
| Sep 18 | 81°C | 79°C | 75°C | 77°C |
| Sep 19 | 79°C | 81°C | 75°C | 78°C |
| Sep 20 | 77°C | 77°C | 75°C | 76°C |
| Sep 21 | 77°C | 79°C | 75°C | 76°C |
| Sep 22 | 77°C | 75°C | 75°C | 75°C |
| Sep 23 | 77°C | 77°C | 75°C | 76°C |
| Sep 24 | 77°C | 73°C | 75°C | 75°C |
| Sep 25 | 77°C | 73°C | 75°C | 74°C |
| Sep 26 | 77°C | 72°C | 75°C | 74°C |
| Sep 27 | 75°C | 72°C | 75°C | 74°C |
| Sep 28 | 77°C | 73°C | 75°C | 75°C |
| Sep 29 | 75°C | 73°C | 73°C | 74°C |
Portsmouth Climate and Swimming Opportunities in September
77°F
Average Day Air Temperature
64°F
Average Night Air Temperature
4 in
Precipitation Amount per Month
9 days
Number of Rainy Days
12 hrs
Daylight
per Day
8 hrs
Sunshine
per Day
9 mph
Average Wind Speed
76%
Average
humidity
Portsmouth lies within the Virginia in United States. The average daytime temperature in Portsmouth in September is 78°F (25°C), while the nighttime average is 65°F (18°C). There are typically nine rainy days during the month, with a total precipitation of 4.4 inches (112 mm). The daylight duration in September in Portsmouth is 12 hours, with an average of 8 hours of sunshine per day. The average wind speed in September is 9 mph (14 km/h), and the humidity level is around 76%.
The water temperature in Portsmouth in September ranges from 73°F to 81°F (23°C to 27°C). At the beginning of the month, the average temperature is around 79°F (26°C), shifting to 77°F (25°C) by mid-September and reaching 75°F (24°C) in the last ten days. Overall, the average sea temperature in Portsmouth for September is 77°F (25°C). Perfect swimming weather — warm water and hot air make for an enjoyable and relaxing experience.
Sea Temperature in September in Nearby Cities
Frequently Asked Questions About Water Temperatures in September in Portsmouth
What is the sea temperature in Portsmouth in September?
The water temperature in the Atlantic Ocean in Portsmouth in September ranges from 73°F to 81°F (23°C to 27°C).
Is it possible to swim in the Atlantic Ocean in Portsmouth in September?
The average sea temperature in Portsmouth in September is 77°F (25°C), and the air temperature is 78°F (25°C), so perfect swimming weather — warm water and hot air make for an enjoyable and relaxing experience.