Weather in Half Moon Bay, United States in May

So you're interested in going to Half Moon Bay, United States in May

May is a very cold and dry time for sunbathing in Half Moon Bay, and not recommended. May is a little too cold to enjoy swimming in Half Moon Bay for any length of time. Consider visiting Half Moon Bay in the months of June, July, August, September, for the best beach weather. Also consider one of our other suggestions for May.

Temperature in Half Moon Bay in May

The average maximum temperature in Half Moon Bay in May is 15°. The average maximum temperature is 14° in the previous month and 16° in the next month.

The average temperature in Half Moon Bay in May is 12°. The average temperature ranges is 11° in the previous month and 13° in the next month.

The average minimum temperature in Half Moon Bay in May is . The minimum temperature is in the previous month and 10° in the next month.

Sunshine in Half Moon Bay in May

The average day light hours per day in Half Moon Bay in May are 14.2 and there are 10.2 hours of sunshine per day on average during May making it a very sunny and pleasant month with long bright days.

The ultraviolet index in Half Moon Bay in May is typically 9.7 during May. An ultraviolet index reading of 8 to 10 indicates a very high risk of harm from unprotected sun exposure. Unprotected skin risks burning in less than 15 minutes. Take extra precautions because unprotected skin and eyes will be damaged and can burn quickly. Tanning will be safest before 10am and after 4pm but only with a good application of sun screen. For those with sensitive skin stay in the shade and wear protective clothing, a wide-brimmed hat, and UV-blocking sunglasses. Generously apply broad spectrum SPF 30+ sunscreen every 2 hours, even on cloudy days. Watch out for relections from water that may increase ultraviolet exposure.

Sea Temperature in Half Moon Bay in May

The average sea water temperature in Half Moon Bay in May is 17.3° which is cool for swimming, shorty wetsuit may help you extend your time in the water.

Rainfall in Half Moon Bay in May

The average total rainfall in Half Moon Bay in May is 0.7cm and on average there are 5.5 rainy days in May making it a dry time to visit the beach.

Humidity in Half Moon Bay in May

The maximum dew point (an indicator of humidity) in Half Moon Bay in May is 11° which is very comfortable. The dew point is 10° in the previous month and 13° in the next month.

The average maximum relative humidity in Half Moon Bay in May is typically 96.3%. The maximum relative humidity is 96.9% in the previous month and 98% in the next month.

The average relative humidity in Half Moon Bay in May is typically 85%. The average relative humidity is 84.1% in the previous month and 88.9% in the next month.

Wind Speed in Half Moon Bay in May

The average maximum wind speed in Half Moon Bay in May is typically 28kmh. The average maximum wind speed is 29kmh in the previous month and 24kmh in the next month.

The average wind speed in Half Moon Bay in May is typically 14kmh. The average wind speed is 14kmh in the previous month and 11kmh in the next month.

The average wind direction in Half Moon Bay in May is from the North West.

Monthly Averages

Suggested Beaches in May

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