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Sea Temperature in Half Moon Bay in September
Complete information on the sea temperature range in the Pacific Ocean in Half Moon Bay in September. Historical daily data. Climate details for September. Tips on swimming conditions and beach relaxation in Half Moon Bay. 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 Half Moon Bay in September
13°C
MINIMUN
15.5°C
AVERAGE
18°C
MAXIMUM
Historical Data of Water Temperature in September in Half Moon Bay
Water Temperature Chart for Pacific Ocean in Half Moon Bay in September
Sea Temperature Table in Half Moon Bay in September Over the Past Years
| Day | 2024 | 2023 | 2022 | Average |
|---|---|---|---|---|
| Sep 1 | 16°C | 17°C | 16°C | 16.0°C |
| Sep 2 | 16°C | 17°C | 14°C | 15.5°C |
| Sep 3 | 16°C | 17°C | 13°C | 15.3°C |
| Sep 4 | 16°C | 17°C | 14°C | 15.8°C |
| Sep 5 | 17°C | 17°C | 15°C | 15.8°C |
| Sep 6 | 18°C | 17°C | 16°C | 16.5°C |
| Sep 7 | 16°C | 17°C | 14°C | 15.3°C |
| Sep 8 | 16°C | 18°C | 14°C | 15.8°C |
| Sep 9 | 16°C | 17°C | 13°C | 15.0°C |
| Sep 10 | 17°C | 17°C | 16°C | 16.0°C |
| Sep 11 | 16°C | 17°C | 14°C | 15.3°C |
| Sep 12 | 16°C | 17°C | 16°C | 15.8°C |
| Sep 13 | 16°C | 17°C | 13°C | 15.0°C |
| Sep 14 | 16°C | 17°C | 16°C | 15.8°C |
| Sep 15 | 16°C | 18°C | 14°C | 15.8°C |
| Sep 16 | 16°C | 17°C | 16°C | 15.8°C |
| Sep 17 | 15°C | 17°C | 14°C | 15.0°C |
| Sep 18 | 17°C | 17°C | 13°C | 15.5°C |
| Sep 19 | 17°C | 17°C | 15°C | 15.8°C |
| Sep 20 | 18°C | 17°C | 15°C | 16.0°C |
| Sep 21 | 17°C | 17°C | 15°C | 15.8°C |
| Sep 22 | 17°C | 17°C | 13°C | 15.5°C |
| Sep 23 | 18°C | 17°C | 15°C | 16.3°C |
| Sep 24 | 17°C | 17°C | 16°C | 16.3°C |
| Sep 25 | 17°C | 18°C | 16°C | 16.3°C |
| Sep 26 | 17°C | 17°C | 16°C | 16.3°C |
| Sep 27 | 17°C | 17°C | 15°C | 16.3°C |
| Sep 28 | 17°C | 17°C | 16°C | 16.5°C |
| Sep 29 | 17°C | 17°C | 13°C | 15.8°C |
Half Moon Bay Climate and Swimming Opportunities in September
23°C
Average Day Air Temperature
14°C
Average Night Air Temperature
6 mm
Precipitation Amount per Month
2 days
Number of Rainy Days
12 hrs
Daylight
per Day
9 hrs
Sunshine
per Day
13 km/h
Average Wind Speed
70%
Average
humidity
Half Moon Bay lies within the California in United States. The average daytime temperature in Half Moon Bay in September is 73°F (23°C), while the nighttime average is 56°F (14°C). There are typically two rainy days during the month, with a total precipitation of 0.2 inches (6 mm). The daylight duration in September in Half Moon Bay is 12 hours, with an average of 9 hours of sunshine per day. The average wind speed in September is 8 mph (13 km/h), and the humidity level is around 70%.
The water temperature in Half Moon Bay in September ranges from 59°F to 61°F (15°C to 16°C). At the beginning of the month, the average temperature is around 61°F (16°C), shifting to 61°F (16°C) by mid-September and reaching 61°F (16°C) in the last ten days. Overall, the average sea temperature in Half Moon Bay for September is 61°F (16°C). Very comfortable swimming conditions. The water is fresh but not too cold, and the air temperature is pleasant.
Sea Temperature in September in Nearby Cities
Frequently Asked Questions About Water Temperatures in September in Half Moon Bay
What is the sea temperature in Half Moon Bay in September?
The water temperature in the Pacific Ocean in Half Moon Bay in September ranges from 59°F to 61°F (15°C to 16°C).
Is it possible to swim in the Pacific Ocean in Half Moon Bay in September?
The average sea temperature in Half Moon Bay in September is 61°F (16°C), and the air temperature is 73°F (23°C), so very comfortable swimming conditions. The water is fresh but not too cold, and the air temperature is pleasant.