Sea Temperature in Half Moon Bay in May

Complete information on the sea temperature range in the Pacific Ocean in Half Moon Bay in May. Historical daily data. Climate details for May. 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 May

50°F

MINIMUN

56°F

AVERAGE

63°F

MAXIMUM

Historical Data of Water Temperature in May in Half Moon Bay

Water Temperature Chart for Pacific Ocean in Half Moon Bay in May

Sea Temperature Table in Half Moon Bay in May Over the Past Years

Day	2024	2023	2022	Average
May 1	61°C	57°C	50°C	55°C
May 2	54°C	59°C	50°C	54°C
May 3	54°C	59°C	50°C	54°C
May 4	55°C	57°C	52°C	55°C
May 5	55°C	59°C	52°C	55°C
May 6	54°C	57°C	52°C	54°C
May 7	55°C	55°C	52°C	54°C
May 8	55°C	57°C	52°C	55°C
May 9	59°C	57°C	52°C	55°C
May 10	59°C	59°C	54°C	57°C
May 11	61°C	59°C	54°C	56°C
May 12	59°C	59°C	54°C	56°C
May 13	59°C	59°C	54°C	56°C
May 14	57°C	59°C	54°C	56°C
May 15	59°C	61°C	54°C	57°C
May 16	59°C	61°C	55°C	58°C
May 17	57°C	61°C	55°C	57°C
May 18	59°C	63°C	55°C	58°C
May 19	59°C	63°C	55°C	58°C
May 20	57°C	59°C	55°C	56°C
May 21	59°C	59°C	55°C	57°C
May 22	57°C	59°C	57°C	57°C
May 23	59°C	59°C	57°C	58°C
May 24	59°C	57°C	57°C	57°C
May 25	59°C	57°C	57°C	57°C
May 26	59°C	59°C	57°C	57°C
May 27	59°C	59°C	57°C	57°C
May 28	55°C	59°C	59°C	57°C
May 29	55°C	61°C	59°C	57°C
May 30	54°C	61°C	59°C	57°C

Half Moon Bay Climate and Swimming Opportunities in May

66°F

Average Day Air Temperature

52°F

Average Night Air Temperature

1 in

Precipitation Amount per Month

3 days

Number of Rainy Days

14 hrs

Daylight
per Day

11 hrs

Sunshine
per Day

10 mph

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 May is 67°F (19°C), while the nighttime average is 52°F (11°C). There are typically three rainy days during the month, with a total precipitation of 0.8 inches (21 mm). The daylight duration in May in Half Moon Bay is 14 hours, with an average of 11 hours of sunshine per day. The average wind speed in May is 11 mph (17 km/h), and the humidity level is around 70%.

The water temperature in Half Moon Bay in May ranges from 54°F to 57°F (12°C to 14°C). At the beginning of the month, the average temperature is around 54°F (12°C), shifting to 57°F (14°C) by mid-May and reaching 57°F (14°C) in the last ten days. Overall, the average sea temperature in Half Moon Bay for May is 55°F (13°C). Ideal conditions for a refreshing swim, though some may still find it a bit cool.

Sea Temperature in May in Nearby Cities

Frequently Asked Questions About Water Temperatures in May in Half Moon Bay

What is the sea temperature in Half Moon Bay in May?

The water temperature in the Pacific Ocean in Half Moon Bay in May ranges from 54°F to 57°F (12°C to 14°C).

Is it possible to swim in the Pacific Ocean in Half Moon Bay in May?

The average sea temperature in Half Moon Bay in May is 55°F (13°C), and the air temperature is 67°F (19°C), so ideal conditions for a refreshing swim, though some may still find it a bit cool.